diff options
Diffstat (limited to 'Documentation')
30 files changed, 867 insertions, 363 deletions
diff --git a/Documentation/RelNotes/1.7.4.2.txt b/Documentation/RelNotes/1.7.4.2.txt index afb387161b..ef4ce1fcd3 100644 --- a/Documentation/RelNotes/1.7.4.2.txt +++ b/Documentation/RelNotes/1.7.4.2.txt @@ -7,6 +7,15 @@ Fixes since v1.7.4.1 * Many documentation updates to match "git cmd -h" output and the git-cmd manual page. + * We used to keep one file descriptor open for each and every packfile + that we have a mmap window on it (read: "in use"), even when for very + tiny packfiles. We now close the file descriptor early when the entire + packfile fits inside one mmap window. + + * "git bisect visualize" tried to run "gitk" in windowing + environments even when "gitk" is not installed, resulting in a + strange error message. + * "git clone /no/such/path" did not fail correctly. * "git commit" did not correctly error out when the user asked to use a @@ -34,8 +43,15 @@ Fixes since v1.7.4.1 to update the upstream branch it forked from is now called "upstream". The old name "tracking" is and will be supported. + * "git submodule update" used to honor the --merge/--rebase option (or + corresponding configuration variables) even for a newly cloned + subproject, which made no sense (so/submodule-no-update-first-time). + * gitweb's "highlight" interface mishandled tabs. + * gitweb didn't understand timezones with GMT offset that is not + multiple of a whole hour. + * gitweb had a few forward-incompatible syntactic constructs and also used incorrect variable when showing the file mode in a diff. diff --git a/Documentation/RelNotes/1.7.4.3.txt b/Documentation/RelNotes/1.7.4.3.txt new file mode 100644 index 0000000000..02a3d5bdf6 --- /dev/null +++ b/Documentation/RelNotes/1.7.4.3.txt @@ -0,0 +1,32 @@ +Git v1.7.4.3 Release Notes +========================== + +Fixes since v1.7.4.2 +-------------------- + + * "git apply" used to confuse lines updated by previous hunks as lines + that existed before when applying a hunk, contributing misapplication + of patches with offsets. + + * "git branch --track" (and "git checkout --track --branch") used to + allow setting up a random non-branch that does not make sense to follow + as the "upstream". The command correctly diagnoses it as an error. + + * "git checkout $other_branch" silently removed untracked symbolic links + in the working tree that are in the way in order to check out paths + under it from the named branch. + + * "git cvsimport" did not bail out immediately when the cvs server cannot + be reached, spewing unnecessary error messages that complain about the + server response that it never got. + + * "git diff --quiet" did not work very well with the "--diff-filter" + option. + + * "git grep -n" lacked a long-hand synonym --line-number. + + * "git stash apply" reported the result of its operation by running + "git status" from the top-level of the working tree; it should (and + now does) run it from the user's working directory. + +And other minor fixes and documentation updates. diff --git a/Documentation/RelNotes/1.7.4.4.txt b/Documentation/RelNotes/1.7.4.4.txt new file mode 100644 index 0000000000..ff06e04a58 --- /dev/null +++ b/Documentation/RelNotes/1.7.4.4.txt @@ -0,0 +1,35 @@ +Git v1.7.4.4 Release Notes +========================== + +Fixes since v1.7.4.3 +-------------------- + + * Compilation of sha1_file.c on BSD platforms were broken due to our + recent use of getrlimit() without including <sys/resource.h>. + + * "git config" did not diagnose incorrect configuration variable names. + + * "git format-patch" did not wrap a long subject line that resulted from + rfc2047 encoding. + + * "git instaweb" should work better again with plackup. + + * "git log --max-count=4 -Sfoobar" now shows 4 commits that changes the + number of occurrences of string "foobar"; it used to scan only for 4 + commits and then emitted only matching ones. + + * "git log --first-parent --boundary $c^..$c" segfaulted on a merge. + + * "git pull" into an empty branch should have behaved as if + fast-forwarding from emptiness to the version being pulled, with + the usual protection against overwriting untracked files. + + * "git submodule" that is run while a merge in the superproject is in + conflicted state tried to process each conflicted submodule up to + three times. + + * "git status" spent all the effort to notice racily-clean index entries + but didn't update the index file to help later operations go faster in + some cases. + +And other minor fixes and documentation updates. diff --git a/Documentation/RelNotes/1.7.5.txt b/Documentation/RelNotes/1.7.5.txt index bb0eb40af4..b1b25133eb 100644 --- a/Documentation/RelNotes/1.7.5.txt +++ b/Documentation/RelNotes/1.7.5.txt @@ -10,15 +10,24 @@ Updates since v1.7.4 * Various vcs-svn enhancements. + * Various git-gui updates (0.14.0). + * Update to more modern HP-UX port. + * The codebase is getting prepared for i18n/l10n; no translated + strings nor translation mechanism in the code yet, but the strings + are being marked for l10n. + + * The bash completion script can now complete symmetric difference + for "git diff" command, e.g. "git diff ...bra<TAB>". + + * The default minimum length of abbreviated and unique object names + can now be configured by setting the core.abbrev configuration + variable. + * "git apply -v" reports offset lines when the patch does not apply at the exact location recorded in the diff output. - * "git branch --track" (and "git checkout --track --branch") used to - allow setting up a random non-branch that does not make sense to follow - as the "upstream". The command correctly diagnoses it as an error. - * "git config" used to be also known as "git repo-config", but the old name is now officially deprecated. @@ -40,12 +49,43 @@ Updates since v1.7.4 reached, without spewing unnecessary error messages that complain about the server response it never got. + * "git fetch" vs "git upload-pack" transfer learned 'no-done' + protocol extension to save one round-trip after the content + negotiation is done. This saves one HTTP RPC, reducing the overall + latency for a trivial fetch. + + * "git fetch" can be told to recursively fetch submodules on-demand. + + * "git grep -f <filename>" learned to treat "-" as "read from the + standard input stream". + * "git grep --no-index" did not honor pathspecs correctly, returning paths outside the specified area. + * "git init" learned the --separate-git-dir option to allow the git + directory for a new repository created elsewhere and linked via the + gitdir mechanism. This is primarily to help submodule support later + to switch between a branch of superproject that has the submodule + and another that does not. + * "git log" type commands now understand globbing pathspecs. You can say "git log -- '*.txt'" for example. + * "git log" family of commands learned --cherry and --cherry-mark + options that can be used to view two diverged branches while omitting + or highlighting equivalent changes that appear on both sides of a + symmetric difference (e.g. "log --cherry A...B"). + + * A lazy "git merge" that didn't say what to merge used to be an error. + When run on a branch that has an upstream defined, however, the command + now merges from the configured upstream. + + * "git mergetool" learned how to drive "beyond compare 3" as well. + + * "git rerere forget" without pathspec used to forget all the saved + conflicts that relate to the current merge; it now requires you to + give it pathspecs. + * "git rev-list --objects $revs -- $pathspec" now limits the objects listed in its output properly with the pathspec, in preparation for narrow clones. @@ -54,16 +94,16 @@ Updates since v1.7.4 "tracking" is used as the push.default semantics or there is no remote configured yet. + * A possible value to the "push.default" configuration variable, + 'tracking', gained a synonym that more naturally describes what it + does, 'upstream'. + * "git rerere" learned a new subcommand "remaining" that is similar to "status" and lists the paths that had conflicts which are known to rerere, but excludes the paths that have already been marked as resolved in the index from its output. "git mergetool" has been updated to use this facility. - * A possible value to the "push.default" configuration variable, - 'tracking', gained a synonym that more naturally describes what it - does, 'upstream'. - Also contains various documentation updates. @@ -73,25 +113,26 @@ Fixes since v1.7.4 All of the fixes in the v1.7.4.X maintenance series are included in this release, unless otherwise noted. - * We used to keep one file descriptor open for each and every packfile - that we have a mmap window on it (read: "in use"), even when for very - tiny packfiles. We now close the file descriptor early when the entire - packfile fits inside one mmap window. - - * "git apply" used to confuse lines updated by previous hunks as lines - that existed before when applying a hunk, contributing misapplication - of patches with offsets. + * "git fetch" from a client that is mostly following the remote + needlessly told all of its refs to the server for both sides to + compute the set of objects that need to be transferred efficiently, + instead of stopping when the server heard enough. In a project with + many tags, this turns out to be extremely wasteful, especially over + the smart HTTP transport (sp/maint-{upload,fetch}-pack-stop-early~1). - * "git checkout $other_branch" silently removed untracked symbolic links - in the working tree that are in the way in order to check out paths - under it from the named branch (js/checkout-untracked-symlink). + * "git fetch" run from a repository that uses the same repository as + its alternate object store as the repository it is fetching from + did not tell the server that it already has access to objects + reachable from the refs in their common alternate object store, + causing it to fetch unnecessary objects (jc/maint-fetch-alt). - * "git submodule update" used to honor the --merge/--rebase option (or - corresponding configuration variables) even for a newly cloned - subproject, which made no sense (so/submodule-no-update-first-time). + * "git remote add --mirror" created a configuration that is suitable for + doing both a mirror fetch and a mirror push at the same time, which + made little sense. We now warn and require the command line to specify + either --mirror=fetch or --mirror=push. --- exec >/var/tmp/1 -O=v1.7.4.1-291-g01de349 +O=v1.7.5-rc1 echo O=$(git describe 'master') git shortlog --no-merges ^maint ^$O master diff --git a/Documentation/config.txt b/Documentation/config.txt index 701fba92dc..750c86d4f5 100644 --- a/Documentation/config.txt +++ b/Documentation/config.txt @@ -62,7 +62,7 @@ Internal whitespace within a variable value is retained verbatim. The values following the equals sign in variable assign are all either a string, an integer, or a boolean. Boolean values may be given as yes/no, -0/1, true/false or on/off. Case is not significant in boolean values, when +1/0, true/false or on/off. Case is not significant in boolean values, when converting value to the canonical form using '--bool' type specifier; 'git config' will ensure that the output is "true" or "false". @@ -320,7 +320,7 @@ core.worktree:: Set the path to the root of the working tree. This can be overridden by the GIT_WORK_TREE environment variable and the '--work-tree' command line option. - The value can an absolute path or relative to the path to + The value can be an absolute path or relative to the path to the .git directory, which is either specified by --git-dir or GIT_DIR, or automatically discovered. If --git-dir or GIT_DIR is specified but none of @@ -558,6 +558,12 @@ core.sparseCheckout:: Enable "sparse checkout" feature. See section "Sparse checkout" in linkgit:git-read-tree[1] for more information. +core.abbrev:: + Set the length object names are abbreviated to. If unspecified, + many commands abbreviate to 7 hexdigits, which may not be enough + for abbreviated object names to stay unique for sufficiently long + time. + add.ignore-errors:: add.ignoreErrors:: Tells 'git add' to continue adding files when some files cannot be @@ -891,9 +897,13 @@ diff.wordRegex:: characters are *ignorable* whitespace. fetch.recurseSubmodules:: - A boolean value which changes the behavior for fetch and pull, the - default is to not recursively fetch populated submodules unless - configured otherwise. + This option can be either set to a boolean value or to 'on-demand'. + Setting it to a boolean changes the behavior of fetch and pull to + unconditionally recurse into submodules when set to true or to not + recurse at all when set to false. When set to 'on-demand' (the default + value), fetch and pull will only recurse into a populated submodule + when its superproject retrieves a commit that updates the submodule's + reference. fetch.unpackLimit:: If the number of objects fetched over the git native @@ -1092,6 +1102,12 @@ All gitcvs variables except for 'gitcvs.usecrlfattr' and is one of "ext" and "pserver") to make them apply only for the given access method. +grep.lineNumber:: + If set to true, enable '-n' option by default. + +grep.extendedRegexp:: + If set to true, enable '--extended-regexp' option by default. + gui.commitmsgwidth:: Defines how wide the commit message window is in the linkgit:git-gui[1]. "75" is the default. @@ -1811,7 +1827,7 @@ submodule.<name>.update:: linkgit:git-submodule[1] and linkgit:gitmodules[5] for details. submodule.<name>.fetchRecurseSubmodules:: - This option can be used to enable/disable recursive fetching of this + This option can be used to control recursive fetching of this submodule. It can be overridden by using the --[no-]recurse-submodules command line option to "git fetch" and "git pull". This setting will override that from in the linkgit:gitmodules[5] diff --git a/Documentation/fetch-options.txt b/Documentation/fetch-options.txt index f37276e5ad..39d326abc6 100644 --- a/Documentation/fetch-options.txt +++ b/Documentation/fetch-options.txt @@ -65,14 +65,33 @@ ifndef::git-pull[] specified with the remote.<name>.tagopt setting. See linkgit:git-config[1]. ---[no-]recurse-submodules:: - This option controls if new commits of all populated submodules should - be fetched too (see linkgit:git-config[1] and linkgit:gitmodules[5]). +--recurse-submodules[=yes|on-demand|no]:: + This option controls if and under what conditions new commits of + populated submodules should be fetched too. It can be used as a + boolean option to completely disable recursion when set to 'no' or to + unconditionally recurse into all populated submodules when set to + 'yes', which is the default when this option is used without any + value. Use 'on-demand' to only recurse into a populated submodule + when the superproject retrieves a commit that updates the submodule's + reference to a commit that isn't already in the local submodule + clone. + +--no-recurse-submodules:: + Disable recursive fetching of submodules (this has the same effect as + using the '--recurse-submodules=no' option). --submodule-prefix=<path>:: Prepend <path> to paths printed in informative messages such as "Fetching submodule foo". This option is used internally when recursing over submodules. + +--recurse-submodules-default=[yes|on-demand]:: + This option is used internally to temporarily provide a + non-negative default value for the --recurse-submodules + option. All other methods of configuring fetch's submodule + recursion (such as settings in linkgit:gitmodules[5] and + linkgit:git-config[1]) override this option, as does + specifying --[no-]recurse-submodules directly. endif::git-pull[] -u:: diff --git a/Documentation/git-am.txt b/Documentation/git-am.txt index 621b720091..6b1b5af64e 100644 --- a/Documentation/git-am.txt +++ b/Documentation/git-am.txt @@ -173,9 +173,9 @@ aborts in the middle. You can recover from this in one of two ways: the index file to bring it into a state that the patch should have produced. Then run the command with the '--resolved' option. -The command refuses to process new mailboxes while the `.git/rebase-apply` -directory exists, so if you decide to start over from scratch, -run `rm -f -r .git/rebase-apply` before running the command with mailbox +The command refuses to process new mailboxes until the current +operation is finished, so if you decide to start over from scratch, +run `git am --abort` before running the command with mailbox names. Before any patches are applied, ORIG_HEAD is set to the tip of the diff --git a/Documentation/git-bisect.txt b/Documentation/git-bisect.txt index a1e47d6798..7b7bafba0c 100644 --- a/Documentation/git-bisect.txt +++ b/Documentation/git-bisect.txt @@ -241,7 +241,12 @@ exit(3) manual page), as the value is chopped with "& 0377". The special exit code 125 should be used when the current source code cannot be tested. If the script exits with this code, the current -revision will be skipped (see `git bisect skip` above). +revision will be skipped (see `git bisect skip` above). 125 was chosen +as the highest sensible value to use for this purpose, because 126 and 127 +are used by POSIX shells to signal specific error status (127 is for +command not found, 126 is for command found but not executable---these +details do not matter, as they are normal errors in the script, as far as +"bisect run" is concerned). You may often find that during a bisect session you want to have temporary modifications (e.g. s/#define DEBUG 0/#define DEBUG 1/ in a @@ -274,53 +279,68 @@ $ git bisect start HEAD origin -- # HEAD is bad, origin is good $ git bisect run make test # "make test" builds and tests ------------ -* Automatically bisect a broken test suite: +* Automatically bisect a broken test case: + ------------ $ cat ~/test.sh #!/bin/sh -make || exit 125 # this skips broken builds -make test # "make test" runs the test suite -$ git bisect start v1.3 v1.1 -- # v1.3 is bad, v1.1 is good +make || exit 125 # this skips broken builds +~/check_test_case.sh # does the test case pass? +$ git bisect start HEAD HEAD~10 -- # culprit is among the last 10 $ git bisect run ~/test.sh ------------ + Here we use a "test.sh" custom script. In this script, if "make" fails, we skip the current commit. +"check_test_case.sh" should "exit 0" if the test case passes, +and "exit 1" otherwise. + -It is safer to use a custom script outside the repository to prevent -interactions between the bisect, make and test processes and the -script. -+ -"make test" should "exit 0", if the test suite passes, and -"exit 1" otherwise. +It is safer if both "test.sh" and "check_test_case.sh" are +outside the repository to prevent interactions between the bisect, +make and test processes and the scripts. -* Automatically bisect a broken test case: +* Automatically bisect with temporary modifications (hot-fix): + ------------ $ cat ~/test.sh #!/bin/sh -make || exit 125 # this skips broken builds -~/check_test_case.sh # does the test case passes ? -$ git bisect start HEAD HEAD~10 -- # culprit is among the last 10 -$ git bisect run ~/test.sh + +# tweak the working tree by merging the hot-fix branch +# and then attempt a build +if git merge --no-commit hot-fix && + make +then + # run project specific test and report its status + ~/check_test_case.sh + status=$? +else + # tell the caller this is untestable + status=125 +fi + +# undo the tweak to allow clean flipping to the next commit +git reset --hard + +# return control +exit $status ------------ + -Here "check_test_case.sh" should "exit 0" if the test case passes, -and "exit 1" otherwise. -+ -It is safer if both "test.sh" and "check_test_case.sh" scripts are -outside the repository to prevent interactions between the bisect, -make and test processes and the scripts. +This applies modifications from a hot-fix branch before each test run, +e.g. in case your build or test environment changed so that older +revisions may need a fix which newer ones have already. (Make sure the +hot-fix branch is based off a commit which is contained in all revisions +which you are bisecting, so that the merge does not pull in too much, or +use `git cherry-pick` instead of `git merge`.) -* Automatically bisect a broken test suite: +* Automatically bisect a broken test case: + ------------ $ git bisect start HEAD HEAD~10 -- # culprit is among the last 10 $ git bisect run sh -c "make || exit 125; ~/check_test_case.sh" ------------ + -Does the same as the previous example, but on a single line. +This shows that you can do without a run script if you write the test +on a single line. SEE ALSO -------- diff --git a/Documentation/git-difftool.txt b/Documentation/git-difftool.txt index a5d9c121f1..590f410abf 100644 --- a/Documentation/git-difftool.txt +++ b/Documentation/git-difftool.txt @@ -31,8 +31,8 @@ OPTIONS --tool=<tool>:: Use the diff tool specified by <tool>. Valid merge tools are: - kdiff3, kompare, tkdiff, meld, xxdiff, emerge, vimdiff, gvimdiff, - ecmerge, diffuse, opendiff, p4merge and araxis. + araxis, bc3, diffuse, emerge, ecmerge, gvimdiff, kdiff3, + kompare, meld, opendiff, p4merge, tkdiff, vimdiff and xxdiff. + If a diff tool is not specified, 'git difftool' will use the configuration variable `diff.tool`. If the diff --git a/Documentation/git-fetch.txt b/Documentation/git-fetch.txt index 7146f6ba0b..67d221467d 100644 --- a/Documentation/git-fetch.txt +++ b/Documentation/git-fetch.txt @@ -76,6 +76,15 @@ The `pu` branch will be updated even if it is does not fast-forward, because it is prefixed with a plus sign; `tmp` will not be. +BUGS +---- +Using --recurse-submodules can only fetch new commits in already checked +out submodules right now. When e.g. upstream added a new submodule in the +just fetched commits of the superproject the submodule itself can not be +fetched, making it impossible to check out that submodule later without +having to do a fetch again. This is expected to be fixed in a future git +version. + SEE ALSO -------- linkgit:git-pull[1] diff --git a/Documentation/git-filter-branch.txt b/Documentation/git-filter-branch.txt index 03c76c717a..9dc1f2a947 100644 --- a/Documentation/git-filter-branch.txt +++ b/Documentation/git-filter-branch.txt @@ -361,7 +361,7 @@ git filter-branch --index-filter \ 'git ls-files -s | sed "s-\t\"*-&newsubdir/-" | GIT_INDEX_FILE=$GIT_INDEX_FILE.new \ git update-index --index-info && - mv $GIT_INDEX_FILE.new $GIT_INDEX_FILE' HEAD + mv "$GIT_INDEX_FILE.new" "$GIT_INDEX_FILE"' HEAD --------------------------------------------------------------- diff --git a/Documentation/git-grep.txt b/Documentation/git-grep.txt index d4d425ea30..d7523b3e45 100644 --- a/Documentation/git-grep.txt +++ b/Documentation/git-grep.txt @@ -31,6 +31,16 @@ Look for specified patterns in the tracked files in the work tree, blobs registered in the index file, or blobs in given tree objects. +CONFIGURATION +------------- + +grep.lineNumber:: + If set to true, enable '-n' option by default. + +grep.extendedRegexp:: + If set to true, enable '--extended-regexp' option by default. + + OPTIONS ------- --cached:: @@ -93,6 +103,7 @@ OPTIONS as a regex). -n:: +--line-number:: Prefix the line number to matching lines. -l:: diff --git a/Documentation/git-log.txt b/Documentation/git-log.txt index 7fb842334f..2c84028838 100644 --- a/Documentation/git-log.txt +++ b/Documentation/git-log.txt @@ -25,6 +25,7 @@ OPTIONS -<n>:: Limits the number of commits to show. + Note that this is a commit limiting option, see below. <since>..<until>:: Show only commits between the named two commits. When @@ -72,16 +73,16 @@ produced by --stat etc. to be prefixed with "\-- " to separate them from options or refnames. +include::rev-list-options.txt[] + +include::pretty-formats.txt[] + Common diff options -~~~~~~~~~~~~~~~~~~~ +------------------- :git-log: 1 include::diff-options.txt[] -include::rev-list-options.txt[] - -include::pretty-formats.txt[] - include::diff-generate-patch.txt[] Examples diff --git a/Documentation/git-merge.txt b/Documentation/git-merge.txt index fb4c05b83f..e2e6aba17e 100644 --- a/Documentation/git-merge.txt +++ b/Documentation/git-merge.txt @@ -11,7 +11,7 @@ SYNOPSIS [verse] 'git merge' [-n] [--stat] [--no-commit] [--squash] [-s <strategy>] [-X <strategy-option>] - [--[no-]rerere-autoupdate] [-m <msg>] <commit>... + [--[no-]rerere-autoupdate] [-m <msg>] [<commit>...] 'git merge' <msg> HEAD <commit>... 'git merge' --abort @@ -95,8 +95,13 @@ commit or stash your changes before running 'git merge'. <commit>...:: Commits, usually other branch heads, to merge into our branch. - You need at least one <commit>. Specifying more than one - <commit> obviously means you are trying an Octopus. + Specifying more than one commit will create a merge with + more than two parents (affectionately called an Octopus merge). ++ +If no commit is given from the command line, and if `merge.defaultToUpstream` +configuration variable is set, merge the remote tracking branches +that the current branch is configured to use as its upstream. +See also the configuration section of this manual page. PRE-MERGE CHECKS diff --git a/Documentation/git-mergetool.txt b/Documentation/git-mergetool.txt index 1834adba75..8c79ae8d2a 100644 --- a/Documentation/git-mergetool.txt +++ b/Documentation/git-mergetool.txt @@ -26,8 +26,8 @@ OPTIONS --tool=<tool>:: Use the merge resolution program specified by <tool>. Valid merge tools are: - kdiff3, tkdiff, meld, xxdiff, emerge, vimdiff, gvimdiff, ecmerge, - diffuse, tortoisemerge, opendiff, p4merge and araxis. + araxis, bc3, diffuse, ecmerge, emerge, gvimdiff, kdiff3, + meld, opendiff, p4merge, tkdiff, tortoisemerge, vimdiff and xxdiff. + If a merge resolution program is not specified, 'git mergetool' will use the configuration variable `merge.tool`. If the diff --git a/Documentation/git-pack-objects.txt b/Documentation/git-pack-objects.txt index a51071e524..08c89d221c 100644 --- a/Documentation/git-pack-objects.txt +++ b/Documentation/git-pack-objects.txt @@ -190,15 +190,20 @@ self-contained. Use `git index-pack --fix-thin` (see linkgit:git-index-pack[1]) to restore the self-contained property. --delta-base-offset:: - A packed archive can express base object of a delta as - either 20-byte object name or as an offset in the - stream, but older version of git does not understand the + A packed archive can express the base object of a delta as + either a 20-byte object name or as an offset in the + stream, but ancient versions of git don't understand the latter. By default, 'git pack-objects' only uses the former format for better compatibility. This option allows the command to use the latter format for compactness. Depending on the average delta chain length, this option typically shrinks the resulting packfile by 3-5 per-cent. ++ +Note: Porcelain commands such as `git gc` (see linkgit:git-gc[1]), +`git repack` (see linkgit:git-repack[1]) pass this option by default +in modern git when they put objects in your repository into pack files. +So does `git bundle` (see linkgit:git-bundle[1]) when it creates a bundle. --threads=<n>:: Specifies the number of threads to spawn when searching for best diff --git a/Documentation/git-pull.txt b/Documentation/git-pull.txt index c2a7f103ee..14609cbd4d 100644 --- a/Documentation/git-pull.txt +++ b/Documentation/git-pull.txt @@ -84,7 +84,7 @@ must be given before the options meant for 'git fetch'. --verbose:: Pass --verbose to git-fetch and git-merge. ---[no-]recurse-submodules:: +--[no-]recurse-submodules[=yes|on-demand|no]:: This option controls if new commits of all populated submodules should be fetched too (see linkgit:git-config[1] and linkgit:gitmodules[5]). That might be necessary to get the data needed for merging submodule @@ -220,6 +220,15 @@ If you tried a pull which resulted in a complex conflicts and would want to start over, you can recover with 'git reset'. +BUGS +---- +Using --recurse-submodules can only fetch new commits in already checked +out submodules right now. When e.g. upstream added a new submodule in the +just fetched commits of the superproject the submodule itself can not be +fetched, making it impossible to check out that submodule later without +having to do a fetch again. This is expected to be fixed in a future git +version. + SEE ALSO -------- linkgit:git-fetch[1], linkgit:git-merge[1], linkgit:git-config[1] diff --git a/Documentation/git-remote.txt b/Documentation/git-remote.txt index 37bd3e5388..528f34a131 100644 --- a/Documentation/git-remote.txt +++ b/Documentation/git-remote.txt @@ -10,7 +10,7 @@ SYNOPSIS -------- [verse] 'git remote' [-v | --verbose] -'git remote add' [-t <branch>] [-m <master>] [-f] [--tags|--no-tags] [--mirror] <name> <url> +'git remote add' [-t <branch>] [-m <master>] [-f] [--tags|--no-tags] [--mirror=<fetch|push>] <name> <url> 'git remote rename' <old> <new> 'git remote rm' <name> 'git remote set-head' <name> (-a | -d | <branch>) @@ -67,11 +67,14 @@ multiple branches without grabbing all branches. With `-m <master>` option, `$GIT_DIR/remotes/<name>/HEAD` is set up to point at remote's `<master>` branch. See also the set-head command. + -In mirror mode, enabled with `\--mirror`, the refs will not be stored -in the 'refs/remotes/' namespace, but in 'refs/heads/'. This option -only makes sense in bare repositories. If a remote uses mirror -mode, furthermore, `git push` will always behave as if `\--mirror` -was passed. +When a fetch mirror is created with `\--mirror=fetch`, the refs will not +be stored in the 'refs/remotes/' namespace, but rather everything in +'refs/' on the remote will be directly mirrored into 'refs/' in the +local repository. This option only makes sense in bare repositories, +because a fetch would overwrite any local commits. ++ +When a push mirror is created with `\--mirror=push`, then `git push` +will always behave as if `\--mirror` was passed. 'rename':: diff --git a/Documentation/git-rerere.txt b/Documentation/git-rerere.txt index 161ecad2a9..52db1d80cf 100644 --- a/Documentation/git-rerere.txt +++ b/Documentation/git-rerere.txt @@ -7,7 +7,7 @@ git-rerere - Reuse recorded resolution of conflicted merges SYNOPSIS -------- -'git rerere' ['clear'|'forget' [<pathspec>]|'diff'|'status'|'gc'] +'git rerere' ['clear'|'forget' <pathspec>|'diff'|'status'|'gc'] DESCRIPTION ----------- @@ -43,7 +43,7 @@ will automatically invoke this command. 'forget' <pathspec>:: This resets the conflict resolutions which rerere has recorded for the current -conflict in <pathspec>. The <pathspec> is optional. +conflict in <pathspec>. 'diff':: diff --git a/Documentation/git-rev-list.txt b/Documentation/git-rev-list.txt index 5ce4d7fd0b..415f4f0b30 100644 --- a/Documentation/git-rev-list.txt +++ b/Documentation/git-rev-list.txt @@ -16,6 +16,10 @@ SYNOPSIS [ \--sparse ] [ \--merges ] [ \--no-merges ] + [ \--min-parents=<number> ] + [ \--no-min-parents ] + [ \--max-parents=<number> ] + [ \--no-max-parents ] [ \--first-parent ] [ \--remove-empty ] [ \--full-history ] @@ -31,6 +35,9 @@ SYNOPSIS [ \--parents ] [ \--timestamp ] [ \--left-right ] + [ \--left-only ] + [ \--right-only ] + [ \--cherry-mark ] [ \--cherry-pick ] [ \--encoding[=<encoding>] ] [ \--(author|committer|grep)=<pattern> ] diff --git a/Documentation/git-submodule.txt b/Documentation/git-submodule.txt index 3a5aa01435..1a16ff6044 100644 --- a/Documentation/git-submodule.txt +++ b/Documentation/git-submodule.txt @@ -101,9 +101,10 @@ status:: currently checked out commit for each submodule, along with the submodule path and the output of 'git describe' for the SHA-1. Each SHA-1 will be prefixed with `-` if the submodule is not - initialized and `+` if the currently checked out submodule commit + initialized, `+` if the currently checked out submodule commit does not match the SHA-1 found in the index of the containing - repository. This command is the default command for 'git submodule'. + repository and `U` if the submodule has merge conflicts. + This command is the default command for 'git submodule'. + If '--recursive' is specified, this command will recurse into nested submodules, and show their status as well. diff --git a/Documentation/git-svn.txt b/Documentation/git-svn.txt index ea8fafd18a..4aa6404f4e 100644 --- a/Documentation/git-svn.txt +++ b/Documentation/git-svn.txt @@ -648,6 +648,16 @@ svn-remote.<name>.rewriteUUID:: where the original UUID is not available via either useSvmProps or useSvnsyncProps. +svn-remote.<name>.pushurl:: + + Similar to git's 'remote.<name>.pushurl', this key is designed + to be used in cases where 'url' points to an SVN repository + via a read-only transport, to provide an alternate read/write + transport. It is assumed that both keys point to the same + repository. Unlike 'commiturl', 'pushurl' is a base path. If + either 'commiturl' or 'pushurl' could be used, 'commiturl' + takes precedence. + svn.brokenSymlinkWorkaround:: This disables potentially expensive checks to workaround broken symlinks checked into SVN by broken clients. Set this diff --git a/Documentation/git-tag.txt b/Documentation/git-tag.txt index 61263fa329..d82f62120a 100644 --- a/Documentation/git-tag.txt +++ b/Documentation/git-tag.txt @@ -165,13 +165,12 @@ You can test which tag you have by doing which should return 0123456789abcdef.. if you have the new version. -Sorry for inconvenience. +Sorry for the inconvenience. ------------ Does this seem a bit complicated? It *should* be. There is no -way that it would be correct to just "fix" it behind peoples -backs. People need to know that their tags might have been -changed. +way that it would be correct to just "fix" it automatically. +People need to know that their tags might have been changed. On Automatic following @@ -189,9 +188,10 @@ the toplevel but not limited to them. Mere mortals when pulling from each other do not necessarily want to automatically get private anchor point tags from the other person. -You would notice "please pull" messages on the mailing list says -repo URL and branch name alone. This is designed to be easily -cut&pasted to a 'git fetch' command line: +Often, "please pull" messages on the mailing list just provide +two pieces of information: a repo URL and a branch name; this +is designed to be easily cut&pasted at the end of a 'git fetch' +command line: ------------ Linus, please pull from @@ -207,14 +207,14 @@ becomes: $ git pull git://git..../proj.git master ------------ -In such a case, you do not want to automatically follow other's -tags. +In such a case, you do not want to automatically follow the other +person's tags. -One important aspect of git is it is distributed, and being -distributed largely means there is no inherent "upstream" or +One important aspect of git is its distributed nature, which +largely means there is no inherent "upstream" or "downstream" in the system. On the face of it, the above example might seem to indicate that the tag namespace is owned -by upper echelon of people and tags only flow downwards, but +by the upper echelon of people and that tags only flow downwards, but that is not the case. It only shows that the usage pattern determines who are interested in whose tags. @@ -232,7 +232,7 @@ this case. It may well be that among networking people, they may want to exchange the tags internal to their group, but in that workflow -they are most likely tracking with each other's progress by +they are most likely tracking each other's progress by having remote-tracking branches. Again, the heuristic to automatically follow such tags is a good thing. @@ -242,21 +242,21 @@ On Backdating Tags If you have imported some changes from another VCS and would like to add tags for major releases of your work, it is useful to be able -to specify the date to embed inside of the tag object. The data in +to specify the date to embed inside of the tag object; such data in the tag object affects, for example, the ordering of tags in the gitweb interface. To set the date used in future tag objects, set the environment -variable GIT_COMMITTER_DATE to one or more of the date and time. The -date and time can be specified in a number of ways; the most common -is "YYYY-MM-DD HH:MM". +variable GIT_COMMITTER_DATE (see the later discussion of possible +values; the most common form is "YYYY-MM-DD HH:MM"). -An example follows. +For example: ------------ $ GIT_COMMITTER_DATE="2006-10-02 10:31" git tag -s v1.0.1 ------------ +include::date-formats.txt[] SEE ALSO -------- diff --git a/Documentation/git.txt b/Documentation/git.txt index 5e57f6995a..7df49ea0d2 100644 --- a/Documentation/git.txt +++ b/Documentation/git.txt @@ -44,9 +44,12 @@ unreleased) version of git, that is available from 'master' branch of the `git.git` repository. Documentation for older releases are available here: -* link:v1.7.4.1/git.html[documentation for release 1.7.4.1] +* link:v1.7.4.4/git.html[documentation for release 1.7.4.4] * release notes for + link:RelNotes/1.7.4.4.txt[1.7.4.4], + link:RelNotes/1.7.4.3.txt[1.7.4.3], + link:RelNotes/1.7.4.2.txt[1.7.4.2], link:RelNotes/1.7.4.1.txt[1.7.4.1], link:RelNotes/1.7.4.txt[1.7.4]. diff --git a/Documentation/gitmodules.txt b/Documentation/gitmodules.txt index 15a2186559..4040941e55 100644 --- a/Documentation/gitmodules.txt +++ b/Documentation/gitmodules.txt @@ -45,12 +45,12 @@ submodule.<name>.update:: the '--merge' or '--rebase' options. submodule.<name>.fetchRecurseSubmodules:: - This option can be used to enable/disable recursive fetching of this + This option can be used to control recursive fetching of this submodule. If this option is also present in the submodules entry in .git/config of the superproject, the setting there will override the one found in .gitmodules. Both settings can be overridden on the command line by using the - "--[no-]recurse-submodules" option to "git fetch" and "git pull".. + "--[no-]recurse-submodules" option to "git fetch" and "git pull". submodule.<name>.ignore:: Defines under what circumstances "git status" and the diff family show diff --git a/Documentation/merge-config.txt b/Documentation/merge-config.txt index 1e5c22c5e5..8920258baa 100644 --- a/Documentation/merge-config.txt +++ b/Documentation/merge-config.txt @@ -6,6 +6,16 @@ merge.conflictstyle:: a `>>>>>>>` marker. An alternate style, "diff3", adds a `|||||||` marker and the original text before the `=======` marker. +merge.defaultToUpstream:: + If merge is called without any commit argument, merge the upstream + branches configured for the current branch by using their last + observed values stored in their remote tracking branches. + The values of the `branch.<current branch>.merge` that name the + branches at the remote named by `branch.<current branch>.remote` + are consulted, and then they are mapped via `remote.<remote>.fetch` + to their corresponding remote tracking branches, and the tips of + these tracking branches are merged. + merge.log:: In addition to branch names, populate the log message with at most the specified number of one-line descriptions from the @@ -33,10 +43,10 @@ merge.stat:: merge.tool:: Controls which merge resolution program is used by - linkgit:git-mergetool[1]. Valid built-in values are: "kdiff3", - "tkdiff", "meld", "xxdiff", "emerge", "vimdiff", "gvimdiff", - "diffuse", "ecmerge", "tortoisemerge", "p4merge", "araxis" and - "opendiff". Any other value is treated is custom merge tool + linkgit:git-mergetool[1]. Valid built-in values are: "araxis", + "bc3", "diffuse", "ecmerge", "emerge", "gvimdiff", "kdiff3", "meld", + "opendiff", "p4merge", "tkdiff", "tortoisemerge", "vimdiff" + and "xxdiff". Any other value is treated is custom merge tool and there must be a corresponding mergetool.<tool>.cmd option. merge.verbosity:: diff --git a/Documentation/merge-options.txt b/Documentation/merge-options.txt index e33e0f8e11..b613d4ed08 100644 --- a/Documentation/merge-options.txt +++ b/Documentation/merge-options.txt @@ -75,9 +75,17 @@ option can be used to override --squash. ifndef::git-pull[] -q:: --quiet:: - Operate quietly. + Operate quietly. Implies --no-progress. -v:: --verbose:: Be verbose. + +--progress:: +--no-progress:: + Turn progress on/off explicitly. If neither is specified, + progress is shown if standard error is connected to a terminal. + Note that not all merge strategies may support progress + reporting. + endif::git-pull[] diff --git a/Documentation/rev-list-options.txt b/Documentation/rev-list-options.txt index 9c47ad885b..73111bb051 100644 --- a/Documentation/rev-list-options.txt +++ b/Documentation/rev-list-options.txt @@ -1,164 +1,10 @@ -Commit Formatting -~~~~~~~~~~~~~~~~~ - -ifdef::git-rev-list[] -Using these options, linkgit:git-rev-list[1] will act similar to the -more specialized family of commit log tools: linkgit:git-log[1], -linkgit:git-show[1], and linkgit:git-whatchanged[1] -endif::git-rev-list[] - -include::pretty-options.txt[] - ---relative-date:: - - Synonym for `--date=relative`. - ---date=(relative|local|default|iso|rfc|short|raw):: - - Only takes effect for dates shown in human-readable format, such - as when using "--pretty". `log.date` config variable sets a default - value for log command's --date option. -+ -`--date=relative` shows dates relative to the current time, -e.g. "2 hours ago". -+ -`--date=local` shows timestamps in user's local timezone. -+ -`--date=iso` (or `--date=iso8601`) shows timestamps in ISO 8601 format. -+ -`--date=rfc` (or `--date=rfc2822`) shows timestamps in RFC 2822 -format, often found in E-mail messages. -+ -`--date=short` shows only date but not time, in `YYYY-MM-DD` format. -+ -`--date=raw` shows the date in the internal raw git format `%s %z` format. -+ -`--date=default` shows timestamps in the original timezone -(either committer's or author's). - -ifdef::git-rev-list[] ---header:: - - Print the contents of the commit in raw-format; each record is - separated with a NUL character. -endif::git-rev-list[] - ---parents:: - - Print also the parents of the commit (in the form "commit parent..."). - Also enables parent rewriting, see 'History Simplification' below. - ---children:: - - Print also the children of the commit (in the form "commit child..."). - Also enables parent rewriting, see 'History Simplification' below. - -ifdef::git-rev-list[] ---timestamp:: - Print the raw commit timestamp. -endif::git-rev-list[] - ---left-right:: - - Mark which side of a symmetric diff a commit is reachable from. - Commits from the left side are prefixed with `<` and those from - the right with `>`. If combined with `--boundary`, those - commits are prefixed with `-`. -+ -For example, if you have this topology: -+ ------------------------------------------------------------------------ - y---b---b branch B - / \ / - / . - / / \ - o---x---a---a branch A ------------------------------------------------------------------------ -+ -you would get an output like this: -+ ------------------------------------------------------------------------ - $ git rev-list --left-right --boundary --pretty=oneline A...B - - >bbbbbbb... 3rd on b - >bbbbbbb... 2nd on b - <aaaaaaa... 3rd on a - <aaaaaaa... 2nd on a - -yyyyyyy... 1st on b - -xxxxxxx... 1st on a ------------------------------------------------------------------------ - ---graph:: - - Draw a text-based graphical representation of the commit history - on the left hand side of the output. This may cause extra lines - to be printed in between commits, in order for the graph history - to be drawn properly. -+ -This enables parent rewriting, see 'History Simplification' below. -+ -This implies the '--topo-order' option by default, but the -'--date-order' option may also be specified. - -ifdef::git-rev-list[] ---count:: - Print a number stating how many commits would have been - listed, and suppress all other output. When used together - with '--left-right', instead print the counts for left and - right commits, separated by a tab. -endif::git-rev-list[] - - -ifndef::git-rev-list[] -Diff Formatting -~~~~~~~~~~~~~~~ - -Below are listed options that control the formatting of diff output. -Some of them are specific to linkgit:git-rev-list[1], however other diff -options may be given. See linkgit:git-diff-files[1] for more options. - --c:: - - With this option, diff output for a merge commit - shows the differences from each of the parents to the merge result - simultaneously instead of showing pairwise diff between a parent - and the result one at a time. Furthermore, it lists only files - which were modified from all parents. - ---cc:: - - This flag implies the '-c' options and further compresses the - patch output by omitting uninteresting hunks whose contents in - the parents have only two variants and the merge result picks - one of them without modification. - --m:: - - This flag makes the merge commits show the full diff like - regular commits; for each merge parent, a separate log entry - and diff is generated. An exception is that only diff against - the first parent is shown when '--first-parent' option is given; - in that case, the output represents the changes the merge - brought _into_ the then-current branch. - --r:: - - Show recursive diffs. - --t:: - - Show the tree objects in the diff output. This implies '-r'. - --s:: - Suppress diff output. -endif::git-rev-list[] - Commit Limiting ~~~~~~~~~~~~~~~ Besides specifying a range of commits that should be listed using the special notations explained in the description, additional commit -limiting may be applied. +limiting may be applied. Note that they are applied before commit +ordering and formatting options, such as '--reverse'. -- @@ -226,11 +72,26 @@ endif::git-rev-list[] --merges:: - Print only merge commits. + Print only merge commits. This is exactly the same as `--min-parents=2`. --no-merges:: - Do not print commits with more than one parent. + Do not print commits with more than one parent. This is + exactly the same as `--max-parents=1`. + +--min-parents=<number>:: +--max-parents=<number>:: +--no-min-parents:: +--no-max-parents:: + + Show only commits which have at least (or at most) that many + commits. In particular, `--max-parents=1` is the same as `--no-merges`, + `--min-parents=2` is the same as `--merges`. `--max-parents=0` + gives all root commits and `--min-parents=3` all octopus merges. ++ +`--no-min-parents` and `--no-max-parents` reset these limits (to no limit) +again. Equivalent forms are `--min-parents=0` (any commit has 0 or more +parents) and `--max-parents=-1` (negative numbers denote no upper limit). --first-parent:: Follow only the first parent commit upon seeing a merge @@ -305,6 +166,11 @@ ifdef::git-rev-list[] to /dev/null as the output does not have to be formatted. endif::git-rev-list[] +--cherry-mark:: + + Like `--cherry-pick` (see below) but mark equivalent commits + with `=` rather than omitting them, and inequivalent ones with `+`. + --cherry-pick:: Omit any commit that introduces the same change as @@ -313,12 +179,33 @@ endif::git-rev-list[] + For example, if you have two branches, `A` and `B`, a usual way to list all commits on only one side of them is with -`--left-right`, like the example above in the description of -that option. It however shows the commits that were cherry-picked +`--left-right` (see the example below in the description of +the `--left-right` option). It however shows the commits that were cherry-picked from the other branch (for example, "3rd on b" may be cherry-picked from branch A). With this option, such pairs of commits are excluded from the output. +--left-only:: +--right-only:: + + List only commits on the respective side of a symmetric range, + i.e. only those which would be marked `<` resp. `>` by + `--left-right`. ++ +For example, `--cherry-pick --right-only A...B` omits those +commits from `B` which are in `A` or are patch-equivalent to a commit in +`A`. In other words, this lists the `{plus}` commits from `git cherry A B`. +More precisely, `--cherry-pick --right-only --no-merges` gives the exact +list. + +--cherry:: + + A synonym for `--right-only --cherry-mark --no-merges`; useful to + limit the output to the commits on our side and mark those that + have been applied to the other side of a forked history with + `git log --cherry upstream...mybranch`, similar to + `git cherry upstream mybranch`. + -g:: --walk-reflogs:: @@ -735,3 +622,158 @@ These options are mostly targeted for packing of git repositories. --do-walk:: Overrides a previous --no-walk. + +Commit Formatting +~~~~~~~~~~~~~~~~~ + +ifdef::git-rev-list[] +Using these options, linkgit:git-rev-list[1] will act similar to the +more specialized family of commit log tools: linkgit:git-log[1], +linkgit:git-show[1], and linkgit:git-whatchanged[1] +endif::git-rev-list[] + +include::pretty-options.txt[] + +--relative-date:: + + Synonym for `--date=relative`. + +--date=(relative|local|default|iso|rfc|short|raw):: + + Only takes effect for dates shown in human-readable format, such + as when using "--pretty". `log.date` config variable sets a default + value for log command's --date option. ++ +`--date=relative` shows dates relative to the current time, +e.g. "2 hours ago". ++ +`--date=local` shows timestamps in user's local timezone. ++ +`--date=iso` (or `--date=iso8601`) shows timestamps in ISO 8601 format. ++ +`--date=rfc` (or `--date=rfc2822`) shows timestamps in RFC 2822 +format, often found in E-mail messages. ++ +`--date=short` shows only date but not time, in `YYYY-MM-DD` format. ++ +`--date=raw` shows the date in the internal raw git format `%s %z` format. ++ +`--date=default` shows timestamps in the original timezone +(either committer's or author's). + +ifdef::git-rev-list[] +--header:: + + Print the contents of the commit in raw-format; each record is + separated with a NUL character. +endif::git-rev-list[] + +--parents:: + + Print also the parents of the commit (in the form "commit parent..."). + Also enables parent rewriting, see 'History Simplification' below. + +--children:: + + Print also the children of the commit (in the form "commit child..."). + Also enables parent rewriting, see 'History Simplification' below. + +ifdef::git-rev-list[] +--timestamp:: + Print the raw commit timestamp. +endif::git-rev-list[] + +--left-right:: + + Mark which side of a symmetric diff a commit is reachable from. + Commits from the left side are prefixed with `<` and those from + the right with `>`. If combined with `--boundary`, those + commits are prefixed with `-`. ++ +For example, if you have this topology: ++ +----------------------------------------------------------------------- + y---b---b branch B + / \ / + / . + / / \ + o---x---a---a branch A +----------------------------------------------------------------------- ++ +you would get an output like this: ++ +----------------------------------------------------------------------- + $ git rev-list --left-right --boundary --pretty=oneline A...B + + >bbbbbbb... 3rd on b + >bbbbbbb... 2nd on b + <aaaaaaa... 3rd on a + <aaaaaaa... 2nd on a + -yyyyyyy... 1st on b + -xxxxxxx... 1st on a +----------------------------------------------------------------------- + +--graph:: + + Draw a text-based graphical representation of the commit history + on the left hand side of the output. This may cause extra lines + to be printed in between commits, in order for the graph history + to be drawn properly. ++ +This enables parent rewriting, see 'History Simplification' below. ++ +This implies the '--topo-order' option by default, but the +'--date-order' option may also be specified. + +ifdef::git-rev-list[] +--count:: + Print a number stating how many commits would have been + listed, and suppress all other output. When used together + with '--left-right', instead print the counts for left and + right commits, separated by a tab. +endif::git-rev-list[] + + +ifndef::git-rev-list[] +Diff Formatting +~~~~~~~~~~~~~~~ + +Below are listed options that control the formatting of diff output. +Some of them are specific to linkgit:git-rev-list[1], however other diff +options may be given. See linkgit:git-diff-files[1] for more options. + +-c:: + + With this option, diff output for a merge commit + shows the differences from each of the parents to the merge result + simultaneously instead of showing pairwise diff between a parent + and the result one at a time. Furthermore, it lists only files + which were modified from all parents. + +--cc:: + + This flag implies the '-c' options and further compresses the + patch output by omitting uninteresting hunks whose contents in + the parents have only two variants and the merge result picks + one of them without modification. + +-m:: + + This flag makes the merge commits show the full diff like + regular commits; for each merge parent, a separate log entry + and diff is generated. An exception is that only diff against + the first parent is shown when '--first-parent' option is given; + in that case, the output represents the changes the merge + brought _into_ the then-current branch. + +-r:: + + Show recursive diffs. + +-t:: + + Show the tree objects in the diff output. This implies '-r'. + +-s:: + Suppress diff output. +endif::git-rev-list[] diff --git a/Documentation/revisions.txt b/Documentation/revisions.txt index 04fceee253..b290b617d4 100644 --- a/Documentation/revisions.txt +++ b/Documentation/revisions.txt @@ -1,147 +1,163 @@ SPECIFYING REVISIONS -------------------- -A revision parameter typically, but not necessarily, names a -commit object. They use what is called an 'extended SHA1' +A revision parameter '<rev>' typically, but not necessarily, names a +commit object. It uses what is called an 'extended SHA1' syntax. Here are various ways to spell object names. The -ones listed near the end of this list are to name trees and +ones listed near the end of this list name trees and blobs contained in a commit. -* The full SHA1 object name (40-byte hexadecimal string), or - a substring of such that is unique within the repository. +'<sha1>', e.g. 'dae86e1950b1277e545cee180551750029cfe735', 'dae86e':: + The full SHA1 object name (40-byte hexadecimal string), or + a leading substring that is unique within the repository. E.g. dae86e1950b1277e545cee180551750029cfe735 and dae86e both - name the same commit object if there are no other object in + name the same commit object if there is no other object in your repository whose object name starts with dae86e. -* An output from 'git describe'; i.e. a closest tag, optionally +'<describeOutput>', e.g. 'v1.7.4.2-679-g3bee7fb':: + Output from `git describe`; i.e. a closest tag, optionally followed by a dash and a number of commits, followed by a dash, a - `g`, and an abbreviated object name. + 'g', and an abbreviated object name. -* A symbolic ref name. E.g. 'master' typically means the commit - object referenced by refs/heads/master. If you - happen to have both heads/master and tags/master, you can +'<refname>', e.g. 'master', 'heads/master', 'refs/heads/master':: + A symbolic ref name. E.g. 'master' typically means the commit + object referenced by 'refs/heads/master'. If you + happen to have both 'heads/master' and 'tags/master', you can explicitly say 'heads/master' to tell git which one you mean. - When ambiguous, a `<name>` is disambiguated by taking the + When ambiguous, a '<name>' is disambiguated by taking the first match in the following rules: - . if `$GIT_DIR/<name>` exists, that is what you mean (this is usually - useful only for `HEAD`, `FETCH_HEAD`, `ORIG_HEAD`, `MERGE_HEAD` - and `CHERRY_PICK_HEAD`); + . If '$GIT_DIR/<name>' exists, that is what you mean (this is usually + useful only for 'HEAD', 'FETCH_HEAD', 'ORIG_HEAD', 'MERGE_HEAD' + and 'CHERRY_PICK_HEAD'); - . otherwise, `refs/<name>` if exists; + . otherwise, 'refs/<name>' if it exists; - . otherwise, `refs/tags/<name>` if exists; + . otherwise, 'refs/tags/<refname>' if it exists; - . otherwise, `refs/heads/<name>` if exists; + . otherwise, 'refs/heads/<name>' if it exists; - . otherwise, `refs/remotes/<name>` if exists; + . otherwise, 'refs/remotes/<name>' if it exists; - . otherwise, `refs/remotes/<name>/HEAD` if exists. + . otherwise, 'refs/remotes/<name>/HEAD' if it exists. + -HEAD names the commit your changes in the working tree is based on. -FETCH_HEAD records the branch you fetched from a remote repository -with your last 'git fetch' invocation. -ORIG_HEAD is created by commands that moves your HEAD in a drastic -way, to record the position of the HEAD before their operation, so that -you can change the tip of the branch back to the state before you ran -them easily. -MERGE_HEAD records the commit(s) you are merging into your branch -when you run 'git merge'. -CHERRY_PICK_HEAD records the commit you are cherry-picking -when you run 'git cherry-pick'. +'HEAD' names the commit on which you based the changes in the working tree. +'FETCH_HEAD' records the branch which you fetched from a remote repository +with your last `git fetch` invocation. +'ORIG_HEAD' is created by commands that move your 'HEAD' in a drastic +way, to record the position of the 'HEAD' before their operation, so that +you can easily change the tip of the branch back to the state before you ran +them. +'MERGE_HEAD' records the commit(s) which you are merging into your branch +when you run `git merge`. +'CHERRY_PICK_HEAD' records the commit which you are cherry-picking +when you run `git cherry-pick`. + -Note that any of the `refs/*` cases above may come either from -the `$GIT_DIR/refs` directory or from the `$GIT_DIR/packed-refs` file. +Note that any of the 'refs/*' cases above may come either from +the '$GIT_DIR/refs' directory or from the '$GIT_DIR/packed-refs' file. -* A ref followed by the suffix '@' with a date specification +'<refname>@\{<date>\}', e.g. 'master@\{yesterday\}', 'HEAD@\{5 minutes ago\}':: + A ref followed by the suffix '@' with a date specification enclosed in a brace pair (e.g. '\{yesterday\}', '\{1 month 2 weeks 3 days 1 hour 1 - second ago\}' or '\{1979-02-26 18:30:00\}') to specify the value + second ago\}' or '\{1979-02-26 18:30:00\}') specifies the value of the ref at a prior point in time. This suffix may only be used immediately following a ref name and the ref must have an - existing log ($GIT_DIR/logs/<ref>). Note that this looks up the state + existing log ('$GIT_DIR/logs/<ref>'). Note that this looks up the state of your *local* ref at a given time; e.g., what was in your local - `master` branch last week. If you want to look at commits made during - certain times, see `--since` and `--until`. + 'master' branch last week. If you want to look at commits made during + certain times, see '--since' and '--until'. -* A ref followed by the suffix '@' with an ordinal specification - enclosed in a brace pair (e.g. '\{1\}', '\{15\}') to specify +'<refname>@\{<n>\}', e.g. 'master@\{1\}':: + A ref followed by the suffix '@' with an ordinal specification + enclosed in a brace pair (e.g. '\{1\}', '\{15\}') specifies the n-th prior value of that ref. For example 'master@\{1\}' is the immediate prior value of 'master' while 'master@\{5\}' is the 5th prior value of 'master'. This suffix may only be used immediately following a ref name and the ref must have an existing - log ($GIT_DIR/logs/<ref>). + log ('$GIT_DIR/logs/<refname>'). -* You can use the '@' construct with an empty ref part to get at a - reflog of the current branch. For example, if you are on the - branch 'blabla', then '@\{1\}' means the same as 'blabla@\{1\}'. +'@\{<n>\}', e.g. '@\{1\}':: + You can use the '@' construct with an empty ref part to get at a + reflog entry of the current branch. For example, if you are on + branch 'blabla' then '@\{1\}' means the same as 'blabla@\{1\}'. -* The special construct '@\{-<n>\}' means the <n>th branch checked out +'@\{-<n>\}', e.g. '@\{-1\}':: + The construct '@\{-<n>\}' means the <n>th branch checked out before the current one. -* The suffix '@\{upstream\}' to a ref (short form 'ref@\{u\}') refers to - the branch the ref is set to build on top of. Missing ref defaults +'<refname>@\{upstream\}', e.g. 'master@\{upstream\}', '@\{u\}':: + The suffix '@\{upstream\}' to a ref (short form '<refname>@\{u\}') refers to + the branch the ref is set to build on top of. A missing ref defaults to the current branch. -* A suffix '{caret}' to a revision parameter (e.g. 'HEAD{caret}') means the first parent of +'<rev>{caret}', e.g. 'HEAD{caret}, v1.5.1{caret}0':: + A suffix '{caret}' to a revision parameter means the first parent of that commit object. '{caret}<n>' means the <n>th parent (i.e. - 'rev{caret}' - is equivalent to 'rev{caret}1'). As a special rule, - 'rev{caret}0' means the commit itself and is used when 'rev' is the + '<rev>{caret}' + is equivalent to '<rev>{caret}1'). As a special rule, + '<rev>{caret}0' means the commit itself and is used when '<rev>' is the object name of a tag object that refers to a commit object. -* A suffix '{tilde}<n>' to a revision parameter means the commit +'<rev>{tilde}<n>', e.g. 'master{tilde}3':: + A suffix '{tilde}<n>' to a revision parameter means the commit object that is the <n>th generation grand-parent of the named - commit object, following only the first parent. I.e. rev~3 is - equivalent to rev{caret}{caret}{caret} which is equivalent to - rev{caret}1{caret}1{caret}1. See below for a illustration of + commit object, following only the first parents. I.e. '<rev>{tilde}3' is + equivalent to '<rev>{caret}{caret}{caret}' which is equivalent to + '<rev>{caret}1{caret}1{caret}1'. See below for an illustration of the usage of this form. -* A suffix '{caret}' followed by an object type name enclosed in - brace pair (e.g. `v0.99.8{caret}\{commit\}`) means the object +'<rev>{caret}\{<type>\}', e.g. 'v0.99.8{caret}\{commit\}':: + A suffix '{caret}' followed by an object type name enclosed in + brace pair means the object could be a tag, and dereference the tag recursively until an object of that type is found or the object cannot be - dereferenced anymore (in which case, barf). `rev{caret}0` - introduced earlier is a short-hand for `rev{caret}\{commit\}`. + dereferenced anymore (in which case, barf). '<rev>{caret}0' + is a short-hand for '<rev>{caret}\{commit\}'. -* A suffix '{caret}' followed by an empty brace pair - (e.g. `v0.99.8{caret}\{\}`) means the object could be a tag, +'<rev>{caret}\{\}', e.g. 'v0.99.8{caret}\{\}':: + A suffix '{caret}' followed by an empty brace pair + means the object could be a tag, and dereference the tag recursively until a non-tag object is found. -* A suffix '{caret}' to a revision parameter followed by a brace - pair that contains a text led by a slash (e.g. `HEAD^{/fix nasty bug}`): - this is the same as `:/fix nasty bug` syntax below except that +'<rev>{caret}\{/<text>\}', e.g. 'HEAD^{/fix nasty bug}':: + A suffix '{caret}' to a revision parameter, followed by a brace + pair that contains a text led by a slash, + is the same as the ':/fix nasty bug' syntax below except that it returns the youngest matching commit which is reachable from - the ref before '{caret}'. + the '<rev>' before '{caret}'. -* A colon, followed by a slash, followed by a text (e.g. `:/fix nasty bug`): this names +':/<text>', e.g. ':/fix nasty bug':: + A colon, followed by a slash, followed by a text, names a commit whose commit message matches the specified regular expression. This name returns the youngest matching commit which is reachable from any ref. If the commit message starts with a - '!', you have to repeat that; the special sequence ':/!', - followed by something else than '!' is reserved for now. + '!' you have to repeat that; the special sequence ':/!', + followed by something else than '!', is reserved for now. The regular expression can match any part of the commit message. To - match messages starting with a string, one can use e.g. `:/^foo`. + match messages starting with a string, one can use e.g. ':/^foo'. -* A suffix ':' followed by a path (e.g. `HEAD:README`); this names the blob or tree +'<rev>:<path>', e.g. 'HEAD:README', ':README', 'master:./README':: + A suffix ':' followed by a path names the blob or tree at the given path in the tree-ish object named by the part before the colon. - ':path' (with an empty part before the colon, e.g. `:README`) + ':path' (with an empty part before the colon) is a special case of the syntax described next: content recorded in the index at the given path. - A path starting with './' or '../' is relative to current working directory. - The given path will be converted to be relative to working tree's root directory. + A path starting with './' or '../' is relative to the current working directory. + The given path will be converted to be relative to the working tree's root directory. This is most useful to address a blob or tree from a commit or tree that has - the same tree structure with the working tree. + the same tree structure as the working tree. -* A colon, optionally followed by a stage number (0 to 3) and a - colon, followed by a path (e.g. `:0:README`); this names a blob object in the - index at the given path. Missing stage number (and the colon - that follows it, e.g. `:README`) names a stage 0 entry. During a merge, stage +':<n>:<path>', e.g. ':0:README', ':README':: + A colon, optionally followed by a stage number (0 to 3) and a + colon, followed by a path, names a blob object in the + index at the given path. A missing stage number (and the colon + that follows it) names a stage 0 entry. During a merge, stage 1 is the common ancestor, stage 2 is the target branch's version (typically the current branch), and stage 3 is the version from - the branch being merged. + the branch which is being merged. Here is an illustration, by Jon Loeliger. Both commit nodes B and C are parents of commit node A. Parent commits are ordered @@ -175,31 +191,31 @@ G H I J SPECIFYING RANGES ----------------- -History traversing commands such as 'git log' operate on a set +History traversing commands such as `git log` operate on a set of commits, not just a single commit. To these commands, specifying a single revision with the notation described in the previous section means the set of commits reachable from that commit, following the commit ancestry chain. -To exclude commits reachable from a commit, a prefix `{caret}` -notation is used. E.g. `{caret}r1 r2` means commits reachable -from `r2` but exclude the ones reachable from `r1`. +To exclude commits reachable from a commit, a prefix '{caret}' +notation is used. E.g. '{caret}r1 r2' means commits reachable +from 'r2' but exclude the ones reachable from 'r1'. This set operation appears so often that there is a shorthand -for it. When you have two commits `r1` and `r2` (named according +for it. When you have two commits 'r1' and 'r2' (named according to the syntax explained in SPECIFYING REVISIONS above), you can ask for commits that are reachable from r2 excluding those that are reachable -from r1 by `{caret}r1 r2` and it can be written as `r1..r2`. +from r1 by '{caret}r1 r2' and it can be written as 'r1..r2'. -A similar notation `r1\...r2` is called symmetric difference -of `r1` and `r2` and is defined as -`r1 r2 --not $(git merge-base --all r1 r2)`. +A similar notation 'r1\...r2' is called symmetric difference +of 'r1' and 'r2' and is defined as +'r1 r2 --not $(git merge-base --all r1 r2)'. It is the set of commits that are reachable from either one of -`r1` or `r2` but not from both. +'r1' or 'r2' but not from both. Two other shorthands for naming a set that is formed by a commit -and its parent commits exist. The `r1{caret}@` notation means all -parents of `r1`. `r1{caret}!` includes commit `r1` but excludes +and its parent commits exist. The 'r1{caret}@' notation means all +parents of 'r1'. 'r1{caret}!' includes commit 'r1' but excludes all of its parents. Here are a handful of examples: diff --git a/Documentation/technical/index-format.txt b/Documentation/technical/index-format.txt new file mode 100644 index 0000000000..7b233ca196 --- /dev/null +++ b/Documentation/technical/index-format.txt @@ -0,0 +1,185 @@ +GIT index format +================ + += The git index file has the following format + + All binary numbers are in network byte order. Version 2 is described + here unless stated otherwise. + + - A 12-byte header consisting of + + 4-byte signature: + The signature is { 'D', 'I', 'R', 'C' } (stands for "dircache") + + 4-byte version number: + The current supported versions are 2 and 3. + + 32-bit number of index entries. + + - A number of sorted index entries (see below). + + - Extensions + + Extensions are identified by signature. Optional extensions can + be ignored if GIT does not understand them. + + GIT currently supports cached tree and resolve undo extensions. + + 4-byte extension signature. If the first byte is 'A'..'Z' the + extension is optional and can be ignored. + + 32-bit size of the extension + + Extension data + + - 160-bit SHA-1 over the content of the index file before this + checksum. + +== Index entry + + Index entries are sorted in ascending order on the name field, + interpreted as a string of unsigned bytes (i.e. memcmp() order, no + localization, no special casing of directory separator '/'). Entries + with the same name are sorted by their stage field. + + 32-bit ctime seconds, the last time a file's metadata changed + this is stat(2) data + + 32-bit ctime nanosecond fractions + this is stat(2) data + + 32-bit mtime seconds, the last time a file's data changed + this is stat(2) data + + 32-bit mtime nanosecond fractions + this is stat(2) data + + 32-bit dev + this is stat(2) data + + 32-bit ino + this is stat(2) data + + 32-bit mode, split into (high to low bits) + + 4-bit object type + valid values in binary are 1000 (regular file), 1010 (symbolic link) + and 1110 (gitlink) + + 3-bit unused + + 9-bit unix permission. Only 0755 and 0644 are valid for regular files. + Symbolic links and gitlinks have value 0 in this field. + + 32-bit uid + this is stat(2) data + + 32-bit gid + this is stat(2) data + + 32-bit file size + This is the on-disk size from stat(2), truncated to 32-bit. + + 160-bit SHA-1 for the represented object + + A 16-bit 'flags' field split into (high to low bits) + + 1-bit assume-valid flag + + 1-bit extended flag (must be zero in version 2) + + 2-bit stage (during merge) + + 12-bit name length if the length is less than 0xFFF; otherwise 0xFFF + is stored in this field. + + (Version 3) A 16-bit field, only applicable if the "extended flag" + above is 1, split into (high to low bits). + + 1-bit reserved for future + + 1-bit skip-worktree flag (used by sparse checkout) + + 1-bit intent-to-add flag (used by "git add -N") + + 13-bit unused, must be zero + + Entry path name (variable length) relative to top level directory + (without leading slash). '/' is used as path separator. The special + path components ".", ".." and ".git" (without quotes) are disallowed. + Trailing slash is also disallowed. + + The exact encoding is undefined, but the '.' and '/' characters + are encoded in 7-bit ASCII and the encoding cannot contain a NUL + byte (iow, this is a UNIX pathname). + + 1-8 nul bytes as necessary to pad the entry to a multiple of eight bytes + while keeping the name NUL-terminated. + +== Extensions + +=== Cached tree + + Cached tree extension contains pre-computed hashes for trees that can + be derived from the index. It helps speed up tree object generation + from index for a new commit. + + When a path is updated in index, the path must be invalidated and + removed from tree cache. + + The signature for this extension is { 'T', 'R', 'E', 'E' }. + + A series of entries fill the entire extension; each of which + consists of: + + - NUL-terminated path component (relative to its parent directory); + + - ASCII decimal number of entries in the index that is covered by the + tree this entry represents (entry_count); + + - A space (ASCII 32); + + - ASCII decimal number that represents the number of subtrees this + tree has; + + - A newline (ASCII 10); and + + - 160-bit object name for the object that would result from writing + this span of index as a tree. + + An entry can be in an invalidated state and is represented by having -1 + in the entry_count field. + + The entries are written out in the top-down, depth-first order. The + first entry represents the root level of the repository, followed by the + first subtree---let's call this A---of the root level (with its name + relative to the root level), followed by the first subtree of A (with + its name relative to A), ... + +=== Resolve undo + + A conflict is represented in the index as a set of higher stage entries. + When a conflict is resolved (e.g. with "git add path"), these higher + stage entries will be removed and a stage-0 entry with proper resoluton + is added. + + When these higher stage entries are removed, they are saved in the + resolve undo extension, so that conflicts can be recreated (e.g. with + "git checkout -m"), in case users want to redo a conflict resolution + from scratch. + + The signature for this extension is { 'R', 'E', 'U', 'C' }. + + A series of entries fill the entire extension; each of which + consists of: + + - NUL-terminated pathname the entry describes (relative to the root of + the repository, i.e. full pathname); + + - Three NUL-terminated ASCII octal numbers, entry mode of entries in + stage 1 to 3 (a missing stage is represented by "0" in this field); + and + + - At most three 160-bit object names of the entry in stages from 1 to 3 + (nothing is written for a missing stage). + |