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2013-04-05submodule: print graph output next to submodule logLibravatar John Keeping1-4/+9
When running "git log -p --submodule=log", the submodule log is not indented by the graph output, although all other lines are. Fix this by prepending the current line prefix to each line of the submodule log. Signed-off-by: John Keeping <john@keeping.me.uk> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2013-03-22submodule: clarify logic in show_submodule_summaryLibravatar Jeff King1-7/+6
There are two uses of the "left" and "right" commit variables that make it hard to be sure what values they have (both for the reader, and for gcc, which wrongly complains that they might be used uninitialized). The function starts with a cascading if statement, checking that the input sha1s exist, and finally working up to preparing a revision walk. We only prepare the walk if the cascading conditional did not find any problems, which we check by seeing whether it set the "message" variable or not. It's simpler and more obvious to just add a condition to the end of the cascade. Later, we check the same "message" variable when deciding whether to clear commit marks on the left/right commits; if it is set, we presumably never started the walk. This is wrong, though; we might have started the walk and munged commit flags, only to encounter an error afterwards. We should always clear the flags on left/right if they exist, whether the walk was successful or not. Signed-off-by: Jeff King <peff@peff.net> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2013-01-23submodule: simplify memory handling in config parsingLibravatar Jeff King1-16/+14
We keep a strbuf for the name of the submodule, even though we only ever add one string to it. Let's just use xmemdupz instead, which is slightly more efficient and makes it easier to follow what is going on. Unfortunately, we still end up having to deal with some memory ownership issues in some code branches, as we have to allocate the string in order to do a string list lookup, and then only sometimes want to hand ownership of that string over to the string_list. Still, making that explicit in the code (as opposed to sometimes detaching the strbuf, and then always releasing it) makes it a little more obvious what is going on. Signed-off-by: Jeff King <peff@peff.net> Reviewed-by: Jonathan Nieder <jrnieder@gmail.com> Acked-by: Jens Lehmann <Jens.Lehmann@web.de> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2013-01-23submodule: use parse_config_key when parsing configLibravatar Jeff King1-9/+10
This makes the code a lot simpler to read by dropping a whole bunch of constant offsets. As a bonus, it means we also feed the whole config variable name to our error functions: [before] $ git -c submodule.foo.fetchrecursesubmodules=bogus checkout fatal: bad foo.fetchrecursesubmodules argument: bogus [after] $ git -c submodule.foo.fetchrecursesubmodules=bogus checkout fatal: bad submodule.foo.fetchrecursesubmodules argument: bogus Signed-off-by: Jeff King <peff@peff.net> Reviewed-by: Jonathan Nieder <jrnieder@gmail.com> Acked-by: Jens Lehmann <Jens.Lehmann@web.de> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2012-11-18submodule: display summary header in boldLibravatar Ramkumar Ramachandra1-4/+4
Currently, 'git diff --submodule' displays output with a bold diff header for non-submodules. So this part is in bold: diff --git a/file1 b/file1 index 30b2f6c..2638038 100644 --- a/file1 +++ b/file1 For submodules, the header looks like this: Submodule submodule1 012b072..248d0fd: Unfortunately, it's easy to miss in the output because it's not bold. Change this. Signed-off-by: Ramkumar Ramachandra <artagnon@gmail.com> Acked-by: Jeff King <peff@peff.net> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2012-10-29Merge branch 'jl/submodule-rm'Libravatar Jeff King1-0/+80
"git rm submodule" cannot blindly remove a submodule directory as its working tree may have local changes, and worse yet, it may even have its repository embedded in it. Teach it some special cases where it is safe to remove a submodule, specifically, when there is no local changes in the submodule working tree, and its repository is not embedded in its working tree but is elsewhere and uses the gitfile mechanism to point at it. * jl/submodule-rm: submodule: teach rm to remove submodules unless they contain a git directory
2012-09-29submodule: teach rm to remove submodules unless they contain a git directoryLibravatar Jens Lehmann1-0/+80
Currently using "git rm" on a submodule - populated or not - fails with this error: fatal: git rm: '<submodule path>': Is a directory This made sense in the past as there was no way to remove a submodule without possibly removing unpushed parts of the submodule's history contained in its .git directory too, so erroring out here protected the user from possible loss of data. But submodules cloned with a recent git version do not contain the .git directory anymore, they use a gitfile to point to their git directory which is safely stored inside the superproject's .git directory. The work tree of these submodules can safely be removed without losing history, so let's teach git to do so. Using rm on an unpopulated submodule now removes the empty directory from the work tree and the gitlink from the index. If the submodule's directory is missing from the work tree, it will still be removed from the index. Using rm on a populated submodule using a gitfile will apply the usual checks for work tree modification adapted to submodules (unless forced). For a submodule that means that the HEAD is the same as recorded in the index, no tracked files are modified and no untracked files that aren't ignored are present in the submodules work tree (ignored files are deemed expendable and won't stop a submodule's work tree from being removed). That logic has to be applied in all nested submodules too. Using rm on a submodule which has its .git directory inside the work trees top level directory will just error out like it did before to protect the repository, even when forced. In the future git could either provide a message informing the user to convert the submodule to use a gitfile or even attempt to do the conversion itself, but that is not part of this change. Signed-off-by: Jens Lehmann <Jens.Lehmann@web.de> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2012-09-11Merge branch 'jk/argv-array'Libravatar Junio C Hamano1-15/+16
Use argv-array API in "git fetch" implementation. * jk/argv-array: submodule: use argv_array instead of hand-building arrays fetch: use argv_array instead of hand-building arrays argv-array: fix bogus cast when freeing array argv-array: add pop function
2012-09-11Merge branch 'jc/merge-bases'Libravatar Junio C Hamano1-6/+6
Optimise the "merge-base" computation a bit, and also update its users that do not need the full merge-base information to call a cheaper subset. * jc/merge-bases: reduce_heads(): reimplement on top of remove_redundant() merge-base: "--is-ancestor A B" get_merge_bases_many(): walk from many tips in parallel in_merge_bases(): use paint_down_to_common() merge_bases_many(): split out the logic to paint history in_merge_bases(): omit unnecessary redundant common ancestor reduction http-push: use in_merge_bases() for fast-forward check receive-pack: use in_merge_bases() for fast-forward check in_merge_bases(): support only one "other" commit
2012-09-02submodule: use argv_array instead of hand-building arraysLibravatar Jens Lehmann1-15/+16
fetch_populated_submodules() allocates the full argv array it uses to recurse into the submodules from the number of given options plus the six argv values it is going to add. It then initializes it with those values which won't change during the iteration and copies the given options into it. Inside the loop the two argv values different for each submodule get replaced with those currently valid. However, this technique is brittle and error-prone (as the comment to explain the magic number 6 indicates), so let's replace it with an argv_array. Instead of replacing the argv values, push them to the argv_array just before the run_command() call (including the option separating them) and pop them from the argv_array right after that. Signed-off-by: Jens Lehmann <Jens.Lehmann@web.de> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2012-08-27in_merge_bases(): support only one "other" commitLibravatar Junio C Hamano1-6/+6
In early days of its life, I planned to make it possible to compute "is a commit contained in all of these other commits?" with this function, but it turned out that no caller needed it. Just make it take two commit objects and add a comment to say what these two functions do. Signed-off-by: Junio C Hamano <gitster@pobox.com>
2012-08-22Merge branch 'tr/void-diff-setup-done'Libravatar Junio C Hamano1-2/+1
Remove unnecessary code. * tr/void-diff-setup-done: diff_setup_done(): return void
2012-08-03diff_setup_done(): return voidLibravatar Thomas Rast1-2/+1
diff_setup_done() has historically returned an error code, but lost the last nonzero return in 943d5b7 (allow diff.renamelimit to be set regardless of -M/-C, 2006-08-09). The callers were in a pretty confused state: some actually checked for the return code, and some did not. Let it return void, and patch all callers to take this into account. This conveniently also gets rid of a handful of different(!) error messages that could never be triggered anyway. Note that the function can still die(). Signed-off-by: Thomas Rast <trast@student.ethz.ch> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2012-05-23Merge branch 'hv/submodule-alt-odb'Libravatar Junio C Hamano1-0/+3
When peeking into object stores of submodules, the code forgot that they might borrow objects from alternate object stores on their own. 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/+3
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>
2012-03-30push: teach --recurse-submodules the on-demand optionLibravatar Heiko Voigt1-0/+48
When using this option git will search for all submodules that have changed in the revisions to be send. It will then try to push the currently checked out branch of each submodule. This helps when a user has finished working on a change which involves submodules and just wants to push everything in one go. Signed-off-by: Fredrik Gustafsson <iveqy@iveqy.com> Mentored-by: Jens Lehmann <Jens.Lehmann@web.de> Mentored-by: Heiko Voigt <hvoigt@hvoigt.net> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2012-03-30Refactor submodule push check to use string list instead of integerLibravatar Heiko Voigt1-12/+11
This allows us to tell the user which submodules have not been pushed. Additionally this is helpful when we want to automatically try to push submodules that have not been pushed. Signed-off-by: Heiko Voigt <hvoigt@hvoigt.net> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2012-03-30Teach revision walking machinery to walk multiple times sequenciallyLibravatar Heiko Voigt1-0/+2
Previously it was not possible to iterate revisions twice using the revision walking api. We add a reset_revision_walk() which clears the used flags. This allows us to do multiple sequencial revision walks. We add the appropriate calls to the existing submodule machinery doing revision walks. This is done to avoid surprises if future code wants to call these functions more than once during the processes lifetime. Signed-off-by: Heiko Voigt <hvoigt@hvoigt.net> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2011-12-17submodule: use diff_tree_combined_merge() instead of diff_tree_combined()Libravatar René Scharfe1-11/+3
Use diff_tree_combined_merge() instead of open-coding it. Signed-off-by: René Scharfe <rene.scharfe@lsrfire.ath.cx> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2011-12-17use struct sha1_array in diff_tree_combined()Libravatar René Scharfe1-9/+5
Maintaining an array of hashes is easier using sha1_array than open-coding it. This patch also fixes a leak of the SHA1 array in diff_tree_combined_merge(). Signed-off-by: René Scharfe <rene.scharfe@lsrfire.ath.cx> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2011-12-13Merge branch 'jl/submodule-status-failure-report'Libravatar Junio C Hamano1-2/+2
* jl/submodule-status-failure-report: diff/status: print submodule path when looking for changes fails
2011-12-08diff/status: print submodule path when looking for changes failsLibravatar Jens Lehmann1-2/+2
diff and status run "git status --porcelain" inside each populated submodule to see if it contains changes (unless told not to do so via config or command line option). When that fails, e.g. due to a corrupt submodule .git directory, it just prints "git status --porcelain failed" or "Could not run git status --porcelain" without giving the user a clue where that happened. Add '"in submodule %s", path' to these error strings to tell the user where exactly the problem occurred. Reported-by: Seth Robertson <in-gitvger@baka.org> Signed-off-by: Jens Lehmann <Jens.Lehmann@web.de> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2011-12-05Merge branch 'ab/clang-lints'Libravatar Junio C Hamano1-1/+1
* ab/clang-lints: cast variable in call to free() in builtin/diff.c and submodule.c apply: get rid of useless x < 0 comparison on a size_t type
2011-11-06cast variable in call to free() in builtin/diff.c and submodule.cLibravatar Ævar Arnfjörð Bjarmason1-1/+1
Both of these free() calls are freeing a "const unsigned char (*)[20]" type while free() expects a "void *". This results in the following warning under clang 2.9: builtin/diff.c:185:7: warning: passing 'const unsigned char (*)[20]' to parameter of type 'void *' discards qualifiers free(parent); ^~~~~~ submodule.c:394:7: warning: passing 'const unsigned char (*)[20]' to parameter of type 'void *' discards qualifiers free(parents); ^~~~~~~ This free()-ing without a cast was added by Jim Meyering to builtin/diff.c in v1.7.6-rc3~4 and later by Fredrik Gustafsson in submodule.c in v1.7.7-rc1~25^2. Signed-off-by: Ævar Arnfjörð Bjarmason <avarab@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2011-10-13submodule: Search for merges only at end of recursive mergeLibravatar Brad King1-1/+5
The submodule merge search is not useful during virtual merges because the results cannot be used automatically. Furthermore any suggestions made by the search may apply to commits different than HEAD:sub and MERGE_HEAD:sub, thus confusing the user. Skip searching for submodule merges during a virtual merge such as that between B and C while merging the heads of: B---BC / \ / A X \ / \ C---CB Run the search only when the recursion level is zero (!o->call_depth). This fixes known breakage tested in t7405-submodule-merge. Signed-off-by: Brad King <brad.king@kitware.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2011-10-05Merge branch 'jk/argv-array'Libravatar Junio C Hamano1-35/+6
* jk/argv-array: run_hook: use argv_array API checkout: use argv_array API bisect: use argv_array API quote: provide sq_dequote_to_argv_array refactor argv_array into generic code quote.h: fix bogus comment add sha1_array API docs
2011-10-05Merge branch 'jk/maint-fetch-submodule-check-fix'Libravatar Junio C Hamano1-5/+72
* jk/maint-fetch-submodule-check-fix: fetch: avoid quadratic loop checking for updated submodules
2011-09-14refactor argv_array into generic codeLibravatar Jeff King1-35/+6
The submodule code recently grew generic code to build a dynamic argv array. Many other parts of the code can reuse this, too, so let's make it generically available. There are two enhancements not found in the original code: 1. We now handle the NULL-termination invariant properly, even when no strings have been pushed (before, you could have an empty, NULL argv). This was not a problem for the submodule code, which always pushed at least one argument, but was not sufficiently safe for generic code. 2. There is a formatted variant of the "push" function. This is a convenience function which was not needed by the submodule code, but will make it easier to port other users to the new code. Signed-off-by: Jeff King <peff@peff.net> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2011-09-12fetch: avoid quadratic loop checking for updated submodulesLibravatar Jeff King1-5/+72
Recent versions of git can be slow to fetch repositories with a large number of refs (or when they already have a large number of refs). For example, GitHub makes pull-requests available as refs, which can lead to a large number of available refs. This slowness goes away when submodule recursion is turned off: $ git ls-remote git://github.com/rails/rails.git | wc -l 3034 [this takes ~10 seconds of CPU time to complete] git fetch --recurse-submodules=no \ git://github.com/rails/rails.git "refs/*:refs/*" [this still isn't done after 10 _minutes_ of pegging the CPU] git fetch \ git://github.com/rails/rails.git "refs/*:refs/*" You can produce a quicker and simpler test case like this: doit() { head=`git rev-parse HEAD` for i in `seq 1 $1`; do echo $head refs/heads/ref$i done >.git/packed-refs echo "==> $1" rm -rf dest git init -q --bare dest && (cd dest && time git.compile fetch -q .. refs/*:refs/*) } rm -rf repo git init -q repo && cd repo && >file && git add file && git commit -q -m one doit 100 doit 200 doit 400 doit 800 doit 1600 doit 3200 Which yields timings like: # refs seconds of CPU 100 0.06 200 0.24 400 0.95 800 3.39 1600 13.66 3200 54.09 Notice that although the number of refs doubles in each trial, the CPU time spent quadruples. The problem is that the submodule recursion code works something like: - for each ref we fetch - for each commit in git rev-list $new_sha1 --not --all - add modified submodules to list - fetch any newly referenced submodules But that means if we fetch N refs, we start N revision walks. Worse, because we use "--all", the number of refs we must process that constitute "--all" keeps growing, too. And you end up doing O(N^2) ref resolutions. Instead, this patch structures the code like this: - for each sha1 we already have - add $old_sha1 to list $old - for each ref we fetch - add $new_sha1 to list $new - for each commit in git rev-list $new --not $old - add modified submodules to list - fetch any newly referenced submodules This yields timings like: # refs seconds of CPU 100 0.00 200 0.04 400 0.04 800 0.10 1600 0.21 3200 0.39 Note that the amount of effort doubles as the number of refs doubles. Similarly, the fetch of rails.git takes about as much time as it does with --recurse-submodules=no. Signed-off-by: Jeff King <peff@peff.net> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2011-09-12Sync with 1.7.6.3Libravatar Junio C Hamano1-0/+4
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2011-09-12Merge branch 'jl/maint-fetch-submodule-check-fix' into maintLibravatar Junio C Hamano1-0/+4
* jl/maint-fetch-submodule-check-fix: fetch: skip on-demand checking when no submodules are configured
2011-09-09fetch: skip on-demand checking when no submodules are configuredLibravatar Jens Lehmann1-0/+4
It makes no sense to do the - possibly very expensive - call to "rev-list <new-ref-sha1> --not --all" in check_for_new_submodule_commits() when there aren't any submodules configured. Leave check_for_new_submodule_commits() early when no name <-> path mappings for submodules are found in the configuration. To make that work reading the configuration had to be moved further up in cmd_fetch(), as doing that after the actual fetch of the superproject was too late. Reported-by: Martin Fick <mfick@codeaurora.org> Signed-off-by: Jens Lehmann <Jens.Lehmann@web.de> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2011-09-02Merge branch 'fg/submodule-ff-check-before-push'Libravatar Junio C Hamano1-0/+108
* fg/submodule-ff-check-before-push: push: Don't push a repository with unpushed submodules
2011-08-28Merge branch 'nd/maint-clone-gitdir'Libravatar Junio C Hamano1-3/+3
* nd/maint-clone-gitdir: clone: allow to clone from .git file read_gitfile_gently(): rename misnamed function to read_gitfile()
2011-08-22read_gitfile_gently(): rename misnamed function to read_gitfile()Libravatar Junio C Hamano1-3/+3
The function was not gentle at all to the callers and died without giving them a chance to deal with possible errors. Rename it to read_gitfile(), and update all the callers. As no existing caller needs a true "gently" variant, we do not bother adding one at this point. Signed-off-by: Junio C Hamano <gitster@pobox.com>
2011-08-20push: Don't push a repository with unpushed submodulesLibravatar Fredrik Gustafsson1-0/+108
When working with submodules it is easy to forget to push a submodule to the server but pushing a super-project that contains a commit for that submodule. The result is that the superproject points at a submodule commit that is not available on the server. This adds the option --recurse-submodules=check to push. When using this option git will check that all submodule commits that are about to be pushed are present on a remote of the submodule. To be able to use a combined diff, disabling a diff callback has been removed from combined-diff.c. Signed-off-by: Fredrik Gustafsson <iveqy@iveqy.com> Mentored-by: Jens Lehmann <Jens.Lehmann@web.de> Mentored-by: Heiko Voigt <hvoigt@hvoigt.net> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2011-08-01Merge branch 'jl/maint-fetch-recursive-fix' into maintLibravatar Junio C Hamano1-0/+1
* jl/maint-fetch-recursive-fix: fetch: Also fetch submodules in subdirectories in on-demand mode
2011-07-13Merge branch 'jl/maint-fetch-recursive-fix'Libravatar Junio C Hamano1-0/+1
* jl/maint-fetch-recursive-fix: fetch: Also fetch submodules in subdirectories in on-demand mode
2011-06-20fetch: Also fetch submodules in subdirectories in on-demand modeLibravatar Jens Lehmann1-0/+1
When on-demand mode was active examining the new commits just fetched in the superproject (to check if they record commits for submodules which are not downloaded yet) wasn't done recursively. Because of that fetch did not recursively fetch submodules living in subdirectories even when it should have. Fix that by adding the RECURSIVE flag to the diff_options used to check the new commits and avoid future regressions in this area by moving a submodule in t5526 into a subdirectory. Signed-off-by: Jens Lehmann <Jens.Lehmann@web.de> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2011-05-14Submodules: Don't parse .gitmodules when it contains, merge conflictsLibravatar Jens Lehmann1-2/+29
Commands like "git status", "git diff" and "git fetch" would fail when the .gitmodules file contained merge conflicts because the config parser would call die() when hitting the conflict markers: "fatal: bad config file line <n> in <path>/.gitmodules" While this behavior was on the safe side, it is really unhelpful to the user to have commands like status and diff fail, as these are needed to find out what's going on. And the error message is only mildly helpful, as it points to the right file but doesn't mention that it is unmerged. Users of git gui were not shown any conflicts at all when this happened. Improve the situation by checking if the index records .gitmodules as unmerged. When that is the case we can't make any assumptions about the configuration to be found there after the merge conflict is resolved by the user, so assume that all recursion is disabled unless .git/config or the global config say otherwise. As soon as the merge conflict is resolved and the .gitmodules file has been staged subsequent commands again honor any configuration done there. Signed-off-by: Jens Lehmann <Jens.Lehmann@web.de> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2011-04-04Merge branch 'jl/submodule-fetch-on-demand'Libravatar Junio C Hamano1-12/+140
* jl/submodule-fetch-on-demand: fetch/pull: Describe --recurse-submodule restrictions in the BUGS section submodule update: Don't fetch when the submodule commit is already present fetch/pull: Don't recurse into a submodule when commits are already present Submodules: Add 'on-demand' value for the 'fetchRecurseSubmodule' option config: teach the fetch.recurseSubmodules option the 'on-demand' value fetch/pull: Add the 'on-demand' value to the --recurse-submodules option fetch/pull: recurse into submodules when necessary Conflicts: builtin/fetch.c submodule.c
2011-03-22Fix sparse warningsLibravatar Stephen Boyd1-3/+3
Fix warnings from 'make check'. - These files don't include 'builtin.h' causing sparse to complain that cmd_* isn't declared: builtin/clone.c:364, builtin/fetch-pack.c:797, builtin/fmt-merge-msg.c:34, builtin/hash-object.c:78, builtin/merge-index.c:69, builtin/merge-recursive.c:22 builtin/merge-tree.c:341, builtin/mktag.c:156, builtin/notes.c:426 builtin/notes.c:822, builtin/pack-redundant.c:596, builtin/pack-refs.c:10, builtin/patch-id.c:60, builtin/patch-id.c:149, builtin/remote.c:1512, builtin/remote-ext.c:240, builtin/remote-fd.c:53, builtin/reset.c:236, builtin/send-pack.c:384, builtin/unpack-file.c:25, builtin/var.c:75 - These files have symbols which should be marked static since they're only file scope: submodule.c:12, diff.c:631, replace_object.c:92, submodule.c:13, submodule.c:14, trace.c:78, transport.c:195, transport-helper.c:79, unpack-trees.c:19, url.c:3, url.c:18, url.c:104, url.c:117, url.c:123, url.c:129, url.c:136, thread-utils.c:21, thread-utils.c:48 - These files redeclare symbols to be different types: builtin/index-pack.c:210, parse-options.c:564, parse-options.c:571, usage.c:49, usage.c:58, usage.c:63, usage.c:72 - These files use a literal integer 0 when they really should use a NULL pointer: daemon.c:663, fast-import.c:2942, imap-send.c:1072, notes-merge.c:362 While we're in the area, clean up some unused #includes in builtin files (mostly exec_cmd.h). Signed-off-by: Stephen Boyd <bebarino@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2011-03-16diff --submodule: split into bite-sized piecesLibravatar Jonathan Nieder1-42/+61
Introduce two functions: - prepare_submodule_summary prepares the revision walker to list changes in a submodule. That is, it: * finds merge bases between the commits pointed to this path from before ("left") and after ("right") the change; * checks whether this is a fast-forward or fast-backward; * prepares a revision walk to list commits in the symmetric difference between the commits at each endpoint. It returns nonzero on error. - print_submodule_summary runs the revision walk and saves the result to a strbuf in --left-right format. The goal is just readability. No functional change intended. Signed-off-by: Jonathan Nieder <jrnieder@gmail.com> Acked-by: Jens Lehmann <Jens.Lehmann@web.de> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2011-03-09fetch/pull: Don't recurse into a submodule when commits are already presentLibravatar Jens Lehmann1-1/+28
When looking for submodules where new commits have been recorded in the superproject ignore those cases where the submodules commits are already present locally. This can happen e.g. when the submodule has been rewound to an earlier state. Then there is no need to fetch the submodule again as the commit recorded in the newly fetched superproject commit has already been fetched earlier into the submodule. Signed-off-by: Jens Lehmann <Jens.Lehmann@web.de> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2011-03-09Submodules: Add 'on-demand' value for the 'fetchRecurseSubmodule' optionLibravatar Jens Lehmann1-2/+7
Now the behavior of fetch and pull can be configured to the recently added 'on-demand' mode separately for each submodule too. Signed-off-by: Jens Lehmann <Jens.Lehmann@web.de> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2011-03-09config: teach the fetch.recurseSubmodules option the 'on-demand' valueLibravatar Jens Lehmann1-1/+1
To enable the user to change the default behavior of "git fetch" and "git pull" regarding submodule recursion add the new "on-demand" value which has just been added to the "--recurse-submodules" command line option. Signed-off-by: Jens Lehmann <Jens.Lehmann@web.de> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2011-03-09fetch/pull: Add the 'on-demand' value to the --recurse-submodules optionLibravatar Jens Lehmann1-2/+6
Until now the --recurse-submodules option could only be used to either fetch all populated submodules recursively or to disable recursion completely. As fetch and pull now by default just fetch those submodules for which new commits have been fetched in the superproject, a command line option to enforce that behavior is needed to be able to override configuration settings. Signed-off-by: Jens Lehmann <Jens.Lehmann@web.de> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2011-03-09fetch/pull: recurse into submodules when necessaryLibravatar Jens Lehmann1-7/+99
To be able to access all commits of populated submodules referenced by the superproject it is sufficient to only then let "git fetch" recurse into a submodule when the new commits fetched in the superproject record new commits for it. Having these commits present is extremely useful when using the "--submodule" option to "git diff" (which is what "git gui" and "gitk" do since 1.6.6), as all submodule commits needed for creating a descriptive output can be accessed. Also merging submodule commits (added in 1.7.3) depends on the submodule commits in question being present to work. Last but not least this enables disconnected operation when using submodules, as all commits necessary for a successful "git submodule update -N" will have been fetched automatically. So we choose this mode as the default for fetch and pull. Before a new or changed ref from upstream is updated in update_local_ref() "git rev-list <new-sha1> --not --branches --remotes" is used to determine all newly fetched commits. These are then walked and diffed against their parent(s) to see if a submodule has been changed. If that is the case, its path is stored to be fetched after the superproject fetch is completed. Using the "--recurse-submodules" or the "--no-recurse-submodules" option disables the examination of the fetched refs because the result will be ignored anyway. There is currently no infrastructure for storing deleted and new submodules in the .git directory of the superproject. That's why fetch and pull for now only fetch submodules that are already checked out and are not renamed. In t7403 the "--no-recurse-submodules" argument had to be added to "git pull" to avoid failure because of the moved upstream submodule repo. Thanks-to: Jonathan Nieder <jrnieder@gmail.com> Thanks-to: Heiko Voigt <hvoigt@hvoigt.net> Signed-off-by: Jens Lehmann <Jens.Lehmann@web.de> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2010-12-09fetch_populated_submodules(): document dynamic allocationLibravatar Junio C Hamano1-1/+2
... while fixing a miscounting. Signed-off-by: Junio C Hamano <gitster@pobox.com>
2010-11-12Submodules: Add the "fetchRecurseSubmodules" config optionLibravatar Jens Lehmann1-2/+18
The new boolean "fetchRecurseSubmodules" config option controls the behavior for "git fetch" and "git pull". It specifies if these commands should recurse into submodules and fetch new commits there too and can be set separately for each submodule. In the .gitmodules file "submodule.<name>.fetchRecurseSubmodules" entries are read before looking for them in .git/config. Thus settings found in .git/config will override those from .gitmodules, thereby allowing the user to ignore settings given by the remote side while also letting upstream set reasonable defaults for those users who don't have special needs. This configuration can be overridden by the command line option "--[no-]recurse-submodules" of "git fetch" and "git pull". Signed-off-by: Jens Lehmann <Jens.Lehmann@web.de> Signed-off-by: Junio C Hamano <gitster@pobox.com>