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2012-05-25Merge branch 'hv/submodule-alt-odb' into maintLibravatar Junio C Hamano1-0/+1
When a submodule repository uses alternate object store mechanism, some commands that were started from the superproject did not notice it and failed with "No such object" errors. The subcommands of "git submodule" command that recursed into the submodule in a separate process were OK; only the ones that cheated and peeked directly into the submodule's repository from the primary process were affected. By Heiko Voigt * hv/submodule-alt-odb: teach add_submodule_odb() to look for alternates
2012-05-14teach add_submodule_odb() to look for alternatesLibravatar Heiko Voigt1-0/+1
Since we allow to link other object databases when loading a submodules database we should also load possible alternates. Signed-off-by: Heiko Voigt <hvoigt@hvoigt.net> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2012-05-11Merge branch 'ct/advise-push-default' into maintLibravatar Junio C Hamano1-1/+2
The cases "git push" fails due to non-ff can be broken into three categories; each case is given a separate advise message. By Christopher Tiwald (2) and Jeff King (1) * ct/advise-push-default: Fix httpd tests that broke when non-ff push advice changed clean up struct ref's nonfastforward field push: Provide situational hints for non-fast-forward errors
2012-04-26Merge branch 'jk/run-command-eacces' into maintLibravatar Junio C Hamano1-0/+2
When PATH contains an unreadable directory, alias expansion code did not kick in, and failed with an error that said "git-subcmd" was not found. By Jeff King (1) and Ramsay Jones (1) * jk/run-command-eacces: run-command: treat inaccessible directories as ENOENT compat/mingw.[ch]: Change return type of exec functions to int
2012-04-26Merge branch 'jk/diff-no-rename-empty' into maintLibravatar Junio C Hamano1-0/+13
Rename detection logic used to match two empty files as renames during merge-recursive, leading unnatural mismerges. By Jeff King * jk/diff-no-rename-empty: merge-recursive: don't detect renames of empty files teach diffcore-rename to optionally ignore empty content make is_empty_blob_sha1 available everywhere drop casts from users EMPTY_TREE_SHA1_BIN
2012-04-26Merge branch 'jc/commit-hook-authorship' into maintLibravatar Junio C Hamano1-0/+16
"git commit --author=$name" did not tell the name that was being recorded in the resulting commit to hooks, even though it does do so when the end user overrode the authorship via the "GIT_AUTHOR_NAME" environment variable. * jc/commit-hook-authorship: commit: pass author/committer info to hooks t7503: does pre-commit-hook learn authorship? ident.c: add split_ident_line() to parse formatted ident line
2012-04-05run-command: treat inaccessible directories as ENOENTLibravatar Jeff King1-0/+2
When execvp reports EACCES, it can be one of two things: 1. We found a file to execute, but did not have permissions to do so. 2. We did not have permissions to look in some directory in the $PATH. In the former case, we want to consider this a permissions problem and report it to the user as such (since getting this for something like "git foo" is likely a configuration error). In the latter case, there is a good chance that the inaccessible directory does not contain anything of interest. Reporting "permission denied" is confusing to the user (and prevents our usual "did you mean...?" lookup). It also prevents git from trying alias lookup, since we do so only when an external command does not exist (not when it exists but has an error). This patch detects EACCES from execvp, checks whether we are in case (2), and if so converts errno to ENOENT. This behavior matches that of "bash" (but not of simpler shells that use execvp more directly, like "dash"). Test stolen from Junio. Signed-off-by: Jeff King <peff@peff.net> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2012-03-26clean up struct ref's nonfastforward fieldLibravatar Jeff King1-4/+1
Each ref structure contains a "nonfastforward" field which is set during push to show whether the ref rewound history. Originally this was a single bit, but it was changed in f25950f (push: Provide situational hints for non-fast-forward errors) to an enum differentiating a non-ff of the current branch versus another branch. However, we never actually set the member according to the enum values, nor did we ever read it expecting anything but a boolean value. But we did use the side effect of declaring the enum constants to store those values in a totally different integer variable. The code as-is isn't buggy, but the enum declaration inside "struct ref" is somewhat misleading. Let's convert nonfastforward back into a single bit, and then define the NON_FF_* constants closer to where they would be used (they are returned via the "int *nonfastforward" parameter to transport_push, so we can define them there). Signed-off-by: Jeff King <peff@peff.net> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2012-03-23make is_empty_blob_sha1 available everywhereLibravatar Jeff King1-0/+13
The read-cache implementation defines this static function, but it is a generally useful concept in git. Let's give the empty blob the same treatment as the empty tree, providing both hex and binary forms of the sha1. Signed-off-by: Jeff King <peff@peff.net> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2012-03-19push: Provide situational hints for non-fast-forward errorsLibravatar Christopher Tiwald1-2/+6
Pushing a non-fast-forward update to a remote repository will result in an error, but the hint text doesn't provide the correct resolution in every case. Give better resolution advice in three push scenarios: 1) If you push your current branch and it triggers a non-fast-forward error, you should merge remote changes with 'git pull' before pushing again. 2) If you push to a shared repository others push to, and your local tracking branches are not kept up to date, the 'matching refs' default will generate non-fast-forward errors on outdated branches. If this is your workflow, the 'matching refs' default is not for you. Consider setting the 'push.default' configuration variable to 'current' or 'upstream' to ensure only your current branch is pushed. 3) If you explicitly specify a ref that is not your current branch or push matching branches with ':', you will generate a non-fast-forward error if any pushed branch tip is out of date. You should checkout the offending branch and merge remote changes before pushing again. Teach transport.c to recognize these scenarios and configure push.c to hint for them. If 'git push's default behavior changes or we discover more scenarios, extension is easy. Standardize on the advice API and add three new advice variables, 'pushNonFFCurrent', 'pushNonFFDefault', and 'pushNonFFMatching'. Setting any of these to 'false' will disable their affiliated advice. Setting 'pushNonFastForward' to false will disable all three, thus preserving the config option for users who already set it, but guaranteeing new users won't disable push advice accidentally. Based-on-patch-by: Junio C Hamano <gitster@pobox.com> Signed-off-by: Christopher Tiwald <christiwald@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2012-03-11ident.c: add split_ident_line() to parse formatted ident lineLibravatar Junio C Hamano1-0/+16
The commit formatting logic format_person_part() in pretty.c implements the logic to split an author/committer ident line into its parts, intermixed with logic to compute its output using these piece it computes. Separate the former out to a helper function split_ident_line() so that other codepath can use the same logic, and rewrite the function using the helper function. Signed-off-by: Junio C Hamano <gitster@pobox.com>
2012-03-06Merge branch 'jh/threadable-symlink-check'Libravatar Junio C Hamano1-0/+2
By Jared Hance * jh/threadable-symlink-check: Add threaded versions of functions in symlinks.c.
2012-03-02Add threaded versions of functions in symlinks.c.Libravatar Jared Hance1-0/+2
check_leading_path() and has_dirs_only_path() both always use the default cache, which could be a caveat for adding parallelism (which is a concern and even a GSoC proposal). Reimplement these two in terms of new threaded_check_leading_path() and threaded_has_dirs_only_path() that take their own copy of the cache. Signed-off-by: Jared Hance <jaredhance@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2012-02-23Merge branch 'jk/config-include'Libravatar Junio C Hamano1-1/+10
* jk/config-include: : An assignment to the include.path pseudo-variable causes the named file : to be included in-place when Git looks up configuration variables. config: add include directive config: eliminate config_exclusive_filename config: stop using config_exclusive_filename config: provide a version of git_config with more options config: teach git_config_rename_section a file argument config: teach git_config_set_multivar_in_file a default path config: copy the return value of prefix_filename t1300: add missing &&-chaining docs/api-config: minor clarifications docs: add a basic description of the config API
2012-02-21Merge branch 'jk/git-dir-lookup' into maintLibravatar Junio C Hamano1-0/+1
* jk/git-dir-lookup: standardize and improve lookup rules for external local repos
2012-02-21Merge branch 'zj/term-columns' into maintLibravatar Junio C Hamano1-0/+1
* zj/term-columns: pager: find out the terminal width before spawning the pager
2012-02-20Merge branch 'zj/decimal-width'Libravatar Junio C Hamano1-0/+1
* zj/decimal-width: make lineno_width() from blame reusable for others Conflicts: cache.h pager.c
2012-02-20Merge branch 'zj/term-columns'Libravatar Junio C Hamano1-0/+1
* zj/term-columns: pager: find out the terminal width before spawning the pager
2012-02-17config: add include directiveLibravatar Jeff King1-1/+10
It can be useful to split your ~/.gitconfig across multiple files. For example, you might have a "main" file which is used on many machines, but a small set of per-machine tweaks. Or you may want to make some of your config public (e.g., clever aliases) while keeping other data back (e.g., your name or other identifying information). Or you may want to include a number of config options in some subset of your repos without copying and pasting (e.g., you want to reference them from the .git/config of participating repos). This patch introduces an include directive for config files. It looks like: [include] path = /path/to/file This is syntactically backwards-compatible with existing git config parsers (i.e., they will see it as another config entry and ignore it unless you are looking up include.path). The implementation provides a "git_config_include" callback which wraps regular config callbacks. Callers can pass it to git_config_from_file, and it will transparently follow any include directives, passing all of the discovered options to the real callback. Include directives are turned on automatically for "regular" git config parsing. This includes calls to git_config, as well as calls to the "git config" program that do not specify a single file (e.g., using "-f", "--global", etc). They are not turned on in other cases, including: 1. Parsing of other config-like files, like .gitmodules. There isn't a real need, and I'd rather be conservative and avoid unnecessary incompatibility or confusion. 2. Reading single files via "git config". This is for two reasons: a. backwards compatibility with scripts looking at config-like files. b. inspection of a specific file probably means you care about just what's in that file, not a general lookup for "do we have this value anywhere at all". If that is not the case, the caller can always specify "--includes". 3. Writing files via "git config"; we want to treat include.* variables as literal items to be copied (or modified), and not expand them. So "git config --unset-all foo.bar" would operate _only_ on .git/config, not any of its included files (just as it also does not operate on ~/.gitconfig). Signed-off-by: Jeff King <peff@peff.net> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2012-02-17config: eliminate config_exclusive_filenameLibravatar Jeff King1-2/+0
This is a magic global variable that was intended as an override to the usual git-config lookup process. Once upon a time, you could specify GIT_CONFIG to any git program, and it would look only at that file. This turned out to be confusing and cause a lot of bugs for little gain. As a result, dc87183 (Only use GIT_CONFIG in "git config", not other programs, 2008-06-30) took this away for all callers except git-config. Since git-config no longer uses it either, the variable can just go away. As the diff shows, nobody was setting to anything except NULL, so we can just replace any sites where it was read with NULL. Signed-off-by: Jeff King <peff@peff.net> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2012-02-17config: provide a version of git_config with more optionsLibravatar Jeff King1-0/+1
Callers may want to provide a specific version of a file in which to look for config. Right now this can be done by setting the magic global config_exclusive_filename variable. By providing a version of git_config that takes a filename, we can take a step towards making this magic global go away. Furthermore, by providing a more "advanced" interface, we now have a a natural place to add new options for callers like git-config, which care about tweaking the specifics of config lookup, without disturbing the large number of "simple" users (i.e., every other part of git). The astute reader of this patch may notice that the logic for handling config_exclusive_filename was taken out of git_config_early, but added into git_config. This means that git_config_early will no longer respect config_exclusive_filename. That's OK, because the only other caller of git_config_early is check_repository_format_gently, but the only function which sets config_exclusive_filename is cmd_config, which does not call check_repository_format_gently (and if it did, it would have been a bug, anyway, as we would be checking the repository format in the wrong file). Signed-off-by: Jeff King <peff@peff.net> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2012-02-17config: teach git_config_rename_section a file argumentLibravatar Jeff King1-0/+1
The other config-writing functions (git_config_set and git_config_set_multivar) each have an -"in_file" version to write a specific file. Let's add one for rename_section, with the eventual goal of moving away from the magic config_exclusive_filename global. Signed-off-by: Jeff King <peff@peff.net> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2012-02-14make lineno_width() from blame reusable for othersLibravatar Zbigniew Jędrzejewski-Szmek1-0/+1
builtin/blame.c has a helper function to compute how many columns we need to show a line-number, whose implementation is reusable as a more generic helper function to count the number of columns necessary to show any cardinal number. Rename it to decimal_width(), move it to pager.c and export it for use by future callers. Signed-off-by: Zbigniew Jędrzejewski-Szmek <zbyszek@in.waw.pl> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2012-02-14Merge branch 'jk/git-dir-lookup'Libravatar Junio C Hamano1-0/+1
* jk/git-dir-lookup: standardize and improve lookup rules for external local repos
2012-02-13pager: find out the terminal width before spawning the pagerLibravatar Zbigniew Jędrzejewski-Szmek1-0/+1
term_columns() checks for terminal width via ioctl(2) on the standard output, but we spawn the pager too early for this check to be useful. The effect of this buglet can be observed by opening a wide terminal and running "git -p help --all", which still shows 80-column output, while "git help --all" uses the full terminal width. Run the check before we spawn the pager to fix this. While at it, move term_columns() to pager.c and export it from cache.h so that callers other than the help subsystem can use it. Signed-off-by: Zbigniew Jędrzejewski-Szmek <zbyszek@in.waw.pl> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2012-02-02standardize and improve lookup rules for external local reposLibravatar Jeff King1-0/+1
When you specify a local repository on the command line of clone, ls-remote, upload-pack, receive-pack, or upload-archive, or in a request to git-daemon, we perform a little bit of lookup magic, doing things like looking in working trees for .git directories and appending ".git" for bare repos. For clone, this magic happens in get_repo_path. For everything else, it happens in enter_repo. In both cases, there are some ambiguous or confusing cases that aren't handled well, and there is one case that is not handled the same by both methods. This patch tries to provide (and test!) standard, sensible lookup rules for both code paths. The intended changes are: 1. When looking up "foo", we have always preferred a working tree "foo" (containing "foo/.git" over the bare "foo.git". But we did not prefer a bare "foo" over "foo.git". With this patch, we do so. 2. We would select directories that existed but didn't actually look like git repositories. With this patch, we make sure a selected directory looks like a git repo. Not only is this more sensible in general, but it will help anybody who is negatively affected by change (1) negatively (e.g., if they had "foo.git" next to its separate work tree "foo", and expect to keep finding "foo.git" when they reference "foo"). 3. The enter_repo code path would, given "foo", look for "foo.git/.git" (i.e., do the ".git" append magic even for a repo with working tree). The clone code path did not; with this patch, they now behave the same. In the unlikely case of a working tree overlaying a bare repo (i.e., a ".git" directory _inside_ a bare repo), we continue to treat it as a working tree (prefering the "inner" .git over the bare repo). This is mainly because the combination seems nonsensical, and I'd rather stick with existing behavior on the off chance that somebody is relying on it. Signed-off-by: Jeff King <peff@peff.net> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2012-01-08server_supports(): parse feature list more carefullyLibravatar Junio C Hamano1-0/+1
We have been carefully choosing feature names used in the protocol extensions so that the vocabulary does not contain a word that is a substring of another word, so it is not a real problem, but we have recently added "quiet" feature word, which would mean we cannot later add some other word with "quiet" (e.g. "quiet-push"), which is awkward. Let's make sure that we can eventually be able to do so by teaching the clients and servers that feature words consist of non whitespace letters. This parser also allows us to later add features with parameters e.g. "feature=1.5" (parameter values need to be quoted for whitespaces, but we will worry about the detauls when we do introduce them). Signed-off-by: Junio C Hamano <gitster@pobox.com> Signed-off-by: Clemens Buchacher <drizzd@aon.at> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2011-12-22Merge branch 'jk/git-prompt'Libravatar Junio C Hamano1-1/+0
* jk/git-prompt: contrib: add credential helper for OS X Keychain Makefile: OS X has /dev/tty Makefile: linux has /dev/tty credential: use git_prompt instead of git_getpass prompt: use git_terminal_prompt add generic terminal prompt function refactor git_getpass into generic prompt function move git_getpass to its own source file imap-send: don't check return value of git_getpass imap-send: avoid buffer overflow Conflicts: Makefile
2011-12-20Merge branch 'mh/ref-api'Libravatar Junio C Hamano1-2/+2
* mh/ref-api: add_ref(): take a (struct ref_entry *) parameter create_ref_entry(): extract function from add_ref() repack_without_ref(): remove temporary resolve_gitlink_ref_recursive(): change to work with struct ref_cache Pass a (ref_cache *) to the resolve_gitlink_*() helper functions resolve_gitlink_ref(): improve docstring get_ref_dir(): change signature refs: change signatures of get_packed_refs() and get_loose_refs() is_dup_ref(): extract function from sort_ref_array() add_ref(): add docstring parse_ref_line(): add docstring is_refname_available(): remove the "quiet" argument clear_ref_array(): rename from free_ref_array() refs: rename parameters result -> sha1 refs: rename "refname" variables struct ref_entry: document name member Conflicts: cache.h refs.c
2011-12-19Merge branch 'jk/fetch-no-tail-match-refs'Libravatar Junio C Hamano1-2/+1
* jk/fetch-no-tail-match-refs: connect.c: drop path_match function fetch-pack: match refs exactly t5500: give fully-qualified refs to fetch-pack drop "match" parameter from get_remote_heads
2011-12-19Merge branch 'nd/resolve-ref'Libravatar Junio C Hamano1-1/+2
* nd/resolve-ref: Rename resolve_ref() to resolve_ref_unsafe() Convert resolve_ref+xstrdup to new resolve_refdup function revert: convert resolve_ref() to read_ref_full()
2011-12-16Merge branch 'jc/stream-to-pack'Libravatar Junio C Hamano1-0/+2
* jc/stream-to-pack: bulk-checkin: replace fast-import based implementation csum-file: introduce sha1file_checkpoint finish_tmp_packfile(): a helper function create_tmp_packfile(): a helper function write_pack_header(): a helper function Conflicts: pack.h
2011-12-13connect.c: drop path_match functionLibravatar Jeff King1-1/+0
This function was used for comparing local and remote ref names during fetch (which makes it a candidate for "most confusingly named function of the year"). It no longer has any callers, so let's get rid of it. Signed-off-by: Jeff King <peff@peff.net> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2011-12-13drop "match" parameter from get_remote_headsLibravatar Jeff King1-1/+1
The get_remote_heads function reads the list of remote refs during git protocol session. It dates all the way back to def88e9 (Commit first cut at "git-fetch-pack", 2005-07-04). At that time, the idea was to come up with a list of refs we were interested in, and then filter the list as we got it from the remote side. Later, 1baaae5 (Make maximal use of the remote refs, 2005-10-28) stopped filtering at the get_remote_heads layer, letting us use the non-matching refs to find common history. As a result, all callers now simply pass an empty match list (and any future callers will want to do the same). So let's drop these now-useless parameters. Signed-off-by: Jeff King <peff@peff.net> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2011-12-13Rename resolve_ref() to resolve_ref_unsafe()Libravatar Nguyễn Thái Ngọc Duy1-1/+1
resolve_ref() may return a pointer to a shared buffer and can be overwritten by the next resolve_ref() calls. Callers need to pay attention, not to keep the pointer when the next call happens. Rename with "_unsafe" suffix to warn developers (or reviewers) before introducing new call sites. This patch is generated using the following command git grep -l 'resolve_ref(' -- '*.[ch]'|xargs sed -i 's/resolve_ref(/resolve_ref_unsafe(/g' Signed-off-by: Nguyễn Thái Ngọc Duy <pclouds@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2011-12-13Convert resolve_ref+xstrdup to new resolve_refdup functionLibravatar Nguyễn Thái Ngọc Duy1-0/+1
Signed-off-by: Nguyễn Thái Ngọc Duy <pclouds@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2011-12-12move git_getpass to its own source fileLibravatar Jeff King1-1/+0
This is currently in connect.c, but really has nothing to do with the git protocol itself. Let's make a new source file all about prompting the user, which will make it cleaner to refactor. Signed-off-by: Jeff King <peff@peff.net> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2011-12-12refs: rename "refname" variablesLibravatar Michael Haggerty1-3/+3
Try to consistently use the variable name "refname" when referring to a string that names a reference. Signed-off-by: Michael Haggerty <mhagger@alum.mit.edu> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2011-12-09Merge branch 'nd/resolve-ref'Libravatar Junio C Hamano1-0/+2
* nd/resolve-ref: Copy resolve_ref() return value for longer use Convert many resolve_ref() calls to read_ref*() and ref_exists() Conflicts: builtin/fmt-merge-msg.c builtin/merge.c refs.c
2011-12-09Merge branch 'jc/pull-signed-tag'Libravatar Junio C Hamano1-1/+1
* jc/pull-signed-tag: commit-tree: teach -m/-F options to read logs from elsewhere commit-tree: update the command line parsing commit: teach --amend to carry forward extra headers merge: force edit and no-ff mode when merging a tag object commit: copy merged signed tags to headers of merge commit merge: record tag objects without peeling in MERGE_HEAD merge: make usage of commit->util more extensible fmt-merge-msg: Add contents of merged tag in the merge message fmt-merge-msg: package options into a structure fmt-merge-msg: avoid early returns refs DWIMmery: use the same rule for both "git fetch" and others fetch: allow "git fetch $there v1.0" to fetch a tag merge: notice local merging of tags and keep it unwrapped fetch: do not store peeled tag object names in FETCH_HEAD Split GPG interface into its own helper library Conflicts: builtin/fmt-merge-msg.c builtin/merge.c
2011-12-01bulk-checkin: replace fast-import based implementationLibravatar Junio C Hamano1-0/+2
This extends the earlier approach to stream a large file directly from the filesystem to its own packfile, and allows "git add" to send large files directly into a single pack. Older code used to spawn fast-import, but the new bulk-checkin API replaces it. Signed-off-by: Junio C Hamano <gitster@pobox.com>
2011-11-13Convert many resolve_ref() calls to read_ref*() and ref_exists()Libravatar Nguyễn Thái Ngọc Duy1-0/+2
resolve_ref() may return a pointer to a static buffer, which is not safe for long-term use because if another resolve_ref() call happens, the buffer may be changed. Many call sites though do not care about this buffer. They simply check if the return value is NULL or not. Convert all these call sites to new wrappers to reduce resolve_ref() calls from 57 to 34. If we change resolve_ref() prototype later on to avoid passing static buffer out, this helps reduce changes. Signed-off-by: Nguyễn Thái Ngọc Duy <pclouds@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2011-11-07refs DWIMmery: use the same rule for both "git fetch" and othersLibravatar Junio C Hamano1-1/+1
"git log frotz" can DWIM to "refs/remotes/frotz/HEAD", but in the remote access context, "git fetch frotz" to fetch what the other side happened to have fetched from what it calls 'frotz' (which may not have any relation to what we consider is 'frotz') the last time would not make much sense, so the fetch rules table did not include "refs/remotes/%.*s/HEAD". When the user really wants to, "git fetch $there remotes/frotz/HEAD" would let her do so anyway, so this is not about safety or security; it merely is about confusion avoidance and discouraging meaningless usage. Specifically, it is _not_ about ambiguity avoidance. A name that would become ambiguous if we use the same rules table for both fetch and local rev-parse would be ambiguous locally at the remote side. So for the same reason as we added rule to allow "git fetch $there v1.0" instead of "git fetch $there tags/v1.0" in the previous commit, here is a bit longer rope for the users, which incidentally simplifies our code. Signed-off-by: Junio C Hamano <gitster@pobox.com>
2011-10-26cache.h: put single NUL at end of struct cache_entryLibravatar René Scharfe1-1/+1
Since in-memory index entries are allocated individually now, the variable slack at the end meant to provide an eight byte alignment is not needed anymore. Have a single NUL instead. This saves zero to seven bytes for an entry, depending on its filename length. Signed-off-by: Rene Scharfe <rene.scharfe@lsrfire.ath.cx> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2011-10-26read-cache.c: allocate index entries individuallyLibravatar René Scharfe1-1/+0
The code to estimate the in-memory size of the index based on its on-disk representation is subtly wrong for certain architecture-dependent struct layouts. Instead of fixing it, replace the code to keep the index entries in a single large block of memory and allocate each entry separately instead. This is both simpler and more flexible, as individual entries can now be freed. Actually using that added flexibility is left for a later patch. Suggested-by: Junio C Hamano <gitster@pobox.com> Signed-off-by: Rene Scharfe <rene.scharfe@lsrfire.ath.cx> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2011-10-21Merge branch 'jk/maint-pack-objects-compete-with-delete'Libravatar Junio C Hamano1-0/+1
* jk/maint-pack-objects-compete-with-delete: downgrade "packfile cannot be accessed" errors to warnings pack-objects: protect against disappearing packs
2011-10-21Merge branch 'ph/transport-with-gitfile'Libravatar Junio C Hamano1-1/+1
* ph/transport-with-gitfile: Fix is_gitfile() for files too small or larger than PATH_MAX to be a gitfile Add test showing git-fetch groks gitfiles Teach transport about the gitfile mechanism Learn to handle gitfiles in enter_repo enter_repo: do not modify input
2011-10-17Merge branch 'bc/attr-ignore-case'Libravatar Junio C Hamano1-0/+1
* bc/attr-ignore-case: attr.c: respect core.ignorecase when matching attribute patterns attr: read core.attributesfile from git_default_core_config builtin/mv.c: plug miniscule memory leak cleanup: use internal memory allocation wrapper functions everywhere attr.c: avoid inappropriate access to strbuf "buf" member Conflicts: transport-helper.c
2011-10-17Merge branch 'jk/name-hash-dirent'Libravatar Junio C Hamano1-0/+1
* jk/name-hash-dirent: fix phantom untracked files when core.ignorecase is set
2011-10-14pack-objects: protect against disappearing packsLibravatar Jeff King1-0/+1
It's possible that while pack-objects is running, a simultaneously running prune process might delete a pack that we are interested in. Because we load the pack indices early on, we know that the pack contains our item, but by the time we try to open and map it, it is gone. Since c715f78, we already protect against this in the normal object access code path, but pack-objects accesses the packs at a lower level. In the normal access path, we call find_pack_entry, which will call find_pack_entry_one on each pack index, which does the actual lookup. If it gets a hit, we will actually open and verify the validity of the matching packfile (using c715f78's is_pack_valid). If we can't open it, we'll issue a warning and pretend that we didn't find it, causing us to go on to the next pack (or on to loose objects). Furthermore, we will cache the descriptor to the opened packfile. Which means that later, when we actually try to access the object, we are likely to still have that packfile opened, and won't care if it has been unlinked from the filesystem. Notice the "likely" above. If there is another pack access in the interim, and we run out of descriptors, we could close the pack. And then a later attempt to access the closed pack could fail (we'll try to re-open it, of course, but it may have been deleted). In practice, this doesn't happen because we tend to look up items and then access them immediately. Pack-objects does not follow this code path. Instead, it accesses the packs at a much lower level, using find_pack_entry_one directly. This means we skip the is_pack_valid check, and may end up with the name of a packfile, but no open descriptor. We can add the same is_pack_valid check here. Unfortunately, the access patterns of pack-objects are not quite as nice for keeping lookup and object access together. We look up each object as we find out about it, and the only later when writing the packfile do we necessarily access it. Which means that the opened packfile may be closed in the interim. In practice, however, adding this check still has value, for three reasons. 1. If you have a reasonable number of packs and/or a reasonable file descriptor limit, you can keep all of your packs open simultaneously. If this is the case, then the race is impossible to trigger. 2. Even if you can't keep all packs open at once, you may end up keeping the deleted one open (i.e., you may get lucky). 3. The race window is shortened. You may notice early that the pack is gone, and not try to access it. Triggering the problem without this check means deleting the pack any time after we read the list of index files, but before we access the looked-up objects. Triggering it with this check means deleting the pack means deleting the pack after we do a lookup (and successfully access the packfile), but before we access the object. Which is a smaller window. Acked-by: Nicolas Pitre <nico@fluxnic.net> Signed-off-by: Jeff King <peff@peff.net> Signed-off-by: Junio C Hamano <gitster@pobox.com>