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2021-04-28subtree: be stricter about validating flagsLibravatar Luke Shumaker2-25/+175
Don't silently ignore a flag that's invalid for a given subcommand. The user expected it to do something; we should tell the user that they are mistaken, instead of surprising the user. It could be argued that this change might break existing users. I'd argue that those existing users are already broken, and they just don't know it. Let them know that they're broken. Signed-off-by: Luke Shumaker <lukeshu@datawire.io> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2021-04-28subtree: push: allow specifying a local rev other than HEADLibravatar Luke Shumaker3-13/+47
'git subtree split' lets you specify a rev other than HEAD. 'git push' lets you specify a mapping between a local thing and a remot ref. So smash those together, and have 'git subtree push' let you specify which local thing to run split on and push the result of that split to the remote ref. Signed-off-by: Luke Shumaker <lukeshu@datawire.io> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2021-04-28subtree: allow 'split' flags to be passed to 'push'Libravatar Luke Shumaker3-12/+223
'push' does a 'split' internally, but it doesn't pass flags through to the 'split'. This is silly, if you need to pass flags to 'split', then it means that you can't use 'push'! So, have 'push' accept 'split' flags, and pass them through to 'split'. Add tests for this by copying split's tests with minimal modification. Signed-off-by: Luke Shumaker <lukeshu@datawire.io> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2021-04-28subtree: allow --squash to be used with --rejoinLibravatar Luke Shumaker3-24/+96
Besides being a genuinely useful thing to do, this also just makes sense and harmonizes which flags may be used when. `git subtree split --rejoin` amounts to "automatically go ahead and do a `git subtree merge` after doing the main `git subtree split`", so it's weird and arbitrary that you can't pass `--squash` to `git subtree split --rejoin` like you can `git subtree merge`. It's weird that `git subtree split --rejoin` inherits `git subtree merge`'s `--message` but not `--squash`. Reconcile the situation by just having `split --rejoin` actually just call `merge` internally (or call `add` instead, as appropriate), so it can get access to the full `merge` behavior, including `--squash`. Signed-off-by: Luke Shumaker <lukeshu@datawire.io> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2021-04-28subtree: give the docs a once-overLibravatar Luke Shumaker3-93/+87
Just went through the docs looking for anything inaccurate or that can be improved. In the '-h' text, in the man page synopsis, and in the man page description: Normalize the ordering of the list of sub-commands: 'add', 'merge', 'split', 'pull', 'push'. This allows us to kinda separate the lower-level add/merge/split from the higher-level pull/push. '-h' text: - correction: Indicate that split's arg is optional. - clarity: Emphasize that 'pull' takes the 'add'/'merge' flags. man page: - correction: State that all subcommands take options (it seemed to indicate that only 'split' takes any options other than '-P'). - correction: 'split' only guarantees that the results are identical if the flags are identical. - correction: The flag is named '--ignore-joins', not '--ignore-join'. - completeness: Clarify that 'push' always operates on HEAD, and that 'split' operates on HEAD if no local commit is given. - clarity: In the description, when listing commands, repeat what their arguments are. This way the reader doesn't need to flip back and forth between the command description and the synopsis and the full description to understand what's being said. - clarity: In the <variables> used to give command arguments, give slightly longer, descriptive names. Like <local-commit> instead of just <commit>. - clarity: Emphasize that 'pull' takes the 'add'/'merge' flags. - style: In the synopsis, list options before the subcommand. This makes things line up and be much more readable when shown non-monospace (such as in `make html`), and also more closely matches other man pages (like `git-submodule.txt`). - style: Use the correct syntax for indicating the options ([<options>] instead of [OPTIONS]). - style: In the synopsis, separate 'pull' and 'push' from the other lower-level commands. I think this helps readability. - style: Code-quote things in prose that seem like they should be code-quoted, like '.gitmodules', flags, or full commands. - style: Minor wording improvements, like more consistent mood (many of the command descriptions start in the imperative mood and switch to the indicative mode by the end). That sort of thing. - style: Capitalize "ID". - style: Remove the "This option is only valid for XXX command" remarks from each option, and instead rely on the section headings. - style: Since that line is getting edited anyway, switch "behaviour" to American "behavior". - style: Trim trailing whitespace. `todo`: - style: Trim trailing whitespace. Signed-off-by: Luke Shumaker <lukeshu@datawire.io> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2021-04-28subtree: have $indent actually affect indentationLibravatar Luke Shumaker1-18/+24
Currently, the $indent variable is just used to track how deeply we're nested, and the debug log is indented by things like debug " foo" That is: The indentation-level is hard-coded. It used to be that the code couldn't recurse, so the indentation level could be known statically, so it made sense to just hard-code it in the output. However, since 315a84f9aa ("subtree: use commits before rejoins for splits", 2018-09-28), it can now recurse, and the debug log is misleading. So fix that. Indent according to $indent. Signed-off-by: Luke Shumaker <lukeshu@datawire.io> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2021-04-28subtree: don't let debug and progress output clashLibravatar Luke Shumaker1-1/+21
Currently, debug output (triggered by passing '-d') and progress output stomp on each other. The debug output is just streamed as lines to stderr, and the progress output is sent to stderr as '%s\r'. When writing to a file, it is awkward to read and difficult to distinguish between the debug output and a progress line. When writing to a terminal the debug lines hide progress lines. So, when '-d' has been passed, spit out progress as 'progress: %s\n', instead of as '%s\r', so that it can be detected, and so that the debug lines don't overwrite the progress when written to a terminal. Signed-off-by: Luke Shumaker <lukeshu@datawire.io> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2021-04-28subtree: add comments and sanity checksLibravatar Luke Shumaker1-3/+61
For each function in subtree, add a usage comment saying what the arguments are, and add an `assert` checking the number of arguments. In figuring out each thing's arguments in order to write those comments and assertions, it turns out that find_existing_splits is written as if it takes multiple 'revs', but it is in fact only ever passed a single 'rev': unrevs="$(find_existing_splits "$dir" "$rev")" || exit $? So go ahead and codify that by documenting and asserting that it takes exactly two arguments, one dir and one rev. Signed-off-by: Luke Shumaker <lukeshu@datawire.io> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2021-04-28subtree: remove duplicate checkLibravatar Luke Shumaker1-4/+0
`cmd_add` starts with a check that the directory doesn't yet exist. However, the `main` function performs the exact same check before calling `cmd_add`. So remove the check from `cmd_add`. Signed-off-by: Luke Shumaker <lukeshu@datawire.io> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2021-04-28subtree: parse revs in individual cmd_ functionsLibravatar Luke Shumaker1-38/+24
The main argument parser goes ahead and tries to parse revs to make things simpler for the sub-command implementations. But, it includes enough special cases for different sub-commands. And it's difficult having having to think about "is this info coming from an argument, or a global variable?". So the main argument parser's effort to make things "simpler" ends up just making it more confusing and complicated. Begone with the 'revs' global variable; parse 'rev=$(...)' as needed in individual 'cmd_*' functions. Begone with the 'default' global variable. Its would-be value is knowable just from which function we're in. Begone with the 'ensure_single_rev' function. Its functionality can be achieved by passing '--verify' to 'git rev-parse'. Signed-off-by: Luke Shumaker <lukeshu@datawire.io> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2021-04-28subtree: use "^{commit}" instead of "^0"Libravatar Luke Shumaker1-2/+2
They are synonyms. Both are used in the file. ^{commit} is clearer, so "standardize" on that. Signed-off-by: Luke Shumaker <lukeshu@datawire.io> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2021-04-28subtree: don't fuss with PATHLibravatar Luke Shumaker1-2/+16
Scripts needing to fuss with with adding $(git --exec-prefix) PATH before loading git-sh-setup is a thing of the past. As far as I can tell, it's been a thing of the past since since Git v1.2.0 (2006-02-12), or more specifically, since 77cb17e940 (Exec git programs without using PATH, 2006-01-10). However, it stuck around in contrib scripts and in third-party scripts for long enough that it wasn't unusual to see. Originally `git subtree` didn't fuss with PATH, but when people (including the original subtree author) had problems, because it was a common thing to see, it seemed that having subtree fuss with PATH was a reasonable solution. Here is an abridged history of fussing with PATH in subtree: 2987e6add3 (Add explicit path of git installation by 'git --exec-path', Gianluca Pacchiella, 2009-08-20) As pointed out by documentation, the correct use of 'git-sh-setup' is using $(git --exec-path) to avoid problems with not standard installations. -. git-sh-setup +. $(git --exec-path)/git-sh-setup 33aaa697a2 (Improve patch to use git --exec-path: add to PATH instead, Avery Pennarun, 2009-08-26) If you (like me) are using a modified git straight out of its source directory (ie. without installing), then --exec-path isn't actually correct. Add it to the PATH instead, so if it is correct, it'll work, but if it's not, we fall back to the previous behaviour. -. $(git --exec-path)/git-sh-setup +PATH=$(git --exec-path):$PATH +. git-sh-setup 9c632ea29c ((Hopefully) fix PATH setting for msysgit, Avery Pennarun, 2010-06-24) Reported by Evan Shaw. The problem is that $(git --exec-path) includes a 'git' binary which is incompatible with the one in /usr/bin; if you run it, it gives you an error about libiconv2.dll. +OPATH=$PATH PATH=$(git --exec-path):$PATH . git-sh-setup +PATH=$OPATH # apparently needed for some versions of msysgit df2302d774 (Another fix for PATH and msysgit, Avery Pennarun, 2010-06-24) Evan Shaw tells me the previous fix didn't work. Let's use this one instead, which he says does work. This fix is kind of wrong because it will run the "correct" git-sh-setup *after* the one in /usr/bin, if there is one, which could be weird if you have multiple versions of git installed. But it works on my Linux and his msysgit, so it's obviously better than what we had before. -OPATH=$PATH -PATH=$(git --exec-path):$PATH +PATH=$PATH:$(git --exec-path) . git-sh-setup -PATH=$OPATH # apparently needed for some versions of msysgit First of all, I disagree with Gianluca's reading of the documentation: - I haven't gone back to read what the documentation said in 2009, but in my reading of the 2021 documentation is that it includes "$(git --exec-path)/" in the synopsis for illustrative purposes, not to say it's the proper way. - After being executed by `git`, the git exec path should be the very first entry in PATH, so it shouldn't matter. - None of the scripts that are part of git do it that way. But secondly, the root reason for fussing with PATH seems to be that Avery didn't know that he needs to set GIT_EXEC_PATH if he's going to use git from the source directory without installing. And finally, Evan's issue is clearly just a bug in msysgit. I assume that msysgit has since fixed the issue, and also msysgit has been deprecated for 6 years now, so let's drop the workaround for it. So, remove the line fussing with PATH. However, since subtree *is* in 'contrib/' and it might get installed in funny ways by users after-the-fact, add a sanity check to the top of the script, checking that it is installed correctly. Signed-off-by: Luke Shumaker <lukeshu@datawire.io> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2021-04-28subtree: use "$*" instead of "$@" as appropriateLibravatar Luke Shumaker1-3/+3
"$*" is for when you want to concatenate the args together, whitespace-separated; and "$@" is for when you want them to be separate strings. There are several places in subtree that erroneously use $@ when concatenating args together into an error message. For instance, if the args are argv[1]="dead" and argv[2]="beef", then the line die "You must provide exactly one revision. Got: '$@'" surely intends to call 'die' with the argument argv[1]="You must provide exactly one revision. Got: 'dead beef'" however, because the line used $@ instead of $*, it will actually call 'die' with the arguments argv[1]="You must provide exactly one revision. Got: 'dead" argv[2]="beef'" This isn't a big deal, because 'die' concatenates its arguments together anyway (using "$*"). But that doesn't change the fact that it was a mistake to use $@ instead of $*, even though in the end $@ still ended up doing the right thing. Signed-off-by: Luke Shumaker <lukeshu@datawire.io> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2021-04-28subtree: use more explicit variable names for cmdline argsLibravatar Luke Shumaker1-66/+66
Make it painfully obvious when reading the code which variables are direct parsings of command line arguments. Signed-off-by: Luke Shumaker <lukeshu@datawire.io> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2021-04-28subtree: use git-sh-setup's `say`Libravatar Luke Shumaker1-15/+7
subtree currently defines its own `say` implementation, rather than using git-sh-setups's implementation. Change that, don't re-invent the wheel. Signed-off-by: Luke Shumaker <lukeshu@datawire.io> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2021-04-28subtree: use `git merge-base --is-ancestor`Libravatar Luke Shumaker1-15/+1
Instead of writing a slow `rev_is_descendant_of_branch $a $b` function in shell, just use the fast `git merge-base --is-ancestor $b $a`. Signed-off-by: Luke Shumaker <lukeshu@datawire.io> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2021-04-28subtree: drop support for git < 1.7Libravatar Luke Shumaker1-15/+4
Suport for Git versions older than 1.7.0 (older than February 2010) was nice to have when git-subtree lived out-of-tree. But now that it lives in git.git, it's not necessary to keep around. While it's technically in contrib, with the standard 'git' packages for common systems (including Arch Linux and macOS) including git-subtree, it seems vanishingly likely to me that people are separately installing git-subtree from git.git alongside an older 'git' install (although it also seems vanishingly likely that people are still using >11 year old git installs). Not that there's much reason to remove it either, it's not much code, and none of my changes depend on a newer git (to my knowledge, anyway; I'm not actually testing against older git). I just figure it's an easy piece of fat to trim, in the journey to making the whole thing easier to hack on. "Ignore space change" is probably helpful when viewing this diff. Signed-off-by: Luke Shumaker <lukeshu@datawire.io> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2021-04-28subtree: more consistent error propagationLibravatar Luke Shumaker1-14/+14
Ensure that every $(subshell) that calls a function (as opposed to an external executable) is followed by `|| exit $?`. Similarly, ensure that every `cmd | while read; do ... done` loop is followed by `|| exit $?`. Both of those constructs mean that it can miss `die` calls, and keep running when it shouldn't. Signed-off-by: Luke Shumaker <lukeshu@datawire.io> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2021-04-28subtree: don't have loose code outside of a functionLibravatar Luke Shumaker1-120/+125
Shove all of the loose code inside of a main() function. This comes down to personal preference more than anything else. A preference that I've developed over years of maintaining large Bash scripts, but still a mere personal preference. In this specific case, it's also moving the `set -- -h`, the `git rev-parse --parseopt`, and the `. git-sh-setup` to be closer to all the rest of the argument parsing, which is a readability win on its own, IMO. "Ignore space change" is probably helpful when viewing this diff. Signed-off-by: Luke Shumaker <lukeshu@datawire.io> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2021-04-28subtree: t7900: add porcelain tests for 'pull' and 'push'Libravatar Luke Shumaker1-0/+127
The 'pull' and 'push' subcommands deserve their own sections in the tests. Add some basic tests for them. Signed-off-by: Luke Shumaker <lukeshu@datawire.io> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2021-04-28subtree: t7900: add a test for the -h flagLibravatar Luke Shumaker1-0/+7
It's a dumb test, but it's surprisingly easy to break. Signed-off-by: Luke Shumaker <lukeshu@datawire.io> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2021-04-28subtree: t7900: rename last_commit_message to last_commit_subjectLibravatar Luke Shumaker1-13/+13
t7900-subtree.sh defines a helper function named last_commit_message. However, it only returns the subject line of the commit message, not the entire commit message. So rename it, to make the name less confusing. Signed-off-by: Luke Shumaker <lukeshu@datawire.io> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2021-04-28subtree: t7900: fix 'verify one file change per commit'Libravatar Luke Shumaker1-40/+6
As far as I can tell, this test isn't actually testing anything, because someone forgot to tack on `--name-only` to `git log`. This seems to have been the case since the test was first written, back in fa16ab36ad ("test.sh: make sure no commit changes more than one file at a time.", 2009-04-26), unless `git log` used to do that by default and didn't need the flag back then? Convincing myself that it's not actually testing anything was tricky, the code is a little hard to reason about. It can be made a lot simpler if instead of trying to parse all of the info from a single `git log`, we're OK calling `git log` from inside of a loop. And it's my opinion that tests are not the place for clever optimized code. So, fix and simplify the test, so that it's actually testing something and is simpler to reason about. Signed-off-by: Luke Shumaker <lukeshu@datawire.io> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2021-04-28subtree: t7900: delete some dead codeLibravatar Luke Shumaker1-11/+1
Signed-off-by: Luke Shumaker <lukeshu@datawire.io> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2021-04-28subtree: t7900: use 'test' for string equalityLibravatar Luke Shumaker1-36/+24
t7900-subtree.sh defines its own `check_equal A B` function, instead of just using `test A = B` like all of the other tests. Don't be special, get rid of `check_equal` in favor of `test`. Signed-off-by: Luke Shumaker <lukeshu@datawire.io> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2021-04-28subtree: t7900: comment subtree_test_create_repoLibravatar Luke Shumaker1-6/+8
It's unclear what the purpose of t7900-subtree.sh's `subtree_test_create_repo` helper function is. It wraps test-lib.sh's, `test_create_repo` but follows that up by setting log.date=relative. Why does it set log.date=relative? My first guess was that at one point the tests required that, but no longer do, and that the function is now vestigial. I even wrote a patch to get rid of it and was moments away from `git send-email`ing it. However, by chance when looking for something else in the history, I discovered the true reason, from e7aac44ed2 (contrib/subtree: ignore log.date configuration, 2015-07-21). It's testing that setting log.date=relative doesn't break `git subtree`, as at one point in the past that did break `git subtree`. So, add a comment about this, to avoid future such confusion. And while at it, go ahead and (1) touch up the function to avoid a pointless subshell and (2) update the one test that didn't use it. Signed-off-by: Luke Shumaker <lukeshu@datawire.io> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2021-04-28subtree: t7900: use consistent formattingLibravatar Luke Shumaker1-35/+35
The formatting in t7900-subtree.sh isn't even consistent throughout the file. Fix that; make it consistent throughout the file. Signed-off-by: Luke Shumaker <lukeshu@datawire.io> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2021-04-28subtree: t7900: use test-lib.sh's test_countLibravatar Luke Shumaker1-336/+300
Use test-lib.sh's `test_count`, instead instead of having t7900-subtree.sh do its own book-keeping with `subtree_test_count` that has to be explicitly incremented by calling `next_test`. Signed-off-by: Luke Shumaker <lukeshu@datawire.io> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2021-04-28subtree: t7900: update for having the default branch name be 'main'Libravatar Luke Shumaker1-58/+59
Most of the tests had been converted to support `GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME=main`, but `contrib/subtree/t/` hadn't. Convert it. Most of the mentions of 'master' can just be replaced with 'HEAD'. Signed-off-by: Luke Shumaker <lukeshu@datawire.io> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2020-08-24Merge branch 'dl/subtree-docs'Libravatar Junio C Hamano1-3/+3
Doc updates for subtree (in contrib/) * dl/subtree-docs: contrib/subtree: document 'push' does not take '--squash' contrib/subtree: fix "unsure" for --message in the document
2020-08-18contrib/subtree: document 'push' does not take '--squash'Libravatar Danny Lin1-2/+2
git subtree push does not support --squash, as previously illustrated in 6ccc71a9 (contrib/subtree: there's no push --squash, 2015-05-07) Signed-off-by: Danny Lin <danny0838@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2020-08-18contrib/subtree: fix "unsure" for --message in the documentLibravatar Danny Lin1-1/+1
Revise the documentation and remove previous "unsure" after making sure that --message supports only 'add', 'merge', 'pull', and 'split --rejoin'. Signed-off-by: Danny Lin <danny0838@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2020-08-03Revert "contrib: subtree: adjust test to change in fmt-merge-msg"Libravatar Emily Shaffer1-4/+2
This reverts commit 508fd8e8baf3e18ee40b2cf0b8899188a8506d07. In 6e6029a8 (fmt-merge-msg: allow merge destination to be omitted again) we get back the behavior where merges against 'master', by default, do not include "into 'master'" at the end of the merge message. This test fix is no longer needed. Signed-off-by: Emily Shaffer <emilyshaffer@google.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2020-06-30contrib: subtree: adjust test to change in fmt-merge-msgLibravatar Đoàn Trần Công Danh1-2/+4
We're starting to stop treating `master' specially in fmt-merge-msg. Adjust the test to reflect that change. Signed-off-by: Đoàn Trần Công Danh <congdanhqx@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2020-04-08subtree: fix build with AsciiDoctor 2Libravatar Johannes Schindelin1-2/+4
This is a (late) companion for f6461b82b93 (Documentation: fix build with Asciidoctor 2, 2019-09-15). Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2019-03-12contrib/subtree: ensure only one rev is providedLibravatar Denton Liu1-12/+12
While looking at the inline help for git-subtree.sh, I noticed that git subtree split --prefix=<prefix> <commit...> was given as an option. However, it only really makes sense to provide one revision because of the way the commits are forwarded to rev-parse so change "<commit...>" to "<commit>" to reflect this. In addition, check the arguments to ensure that only one rev is provided for all subcommands that accept a commit. Signed-off-by: Denton Liu <liu.denton@gmail.com> Acked-by: Avery Pennarun <apenwarr@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2018-10-30Merge branch 'ch/subtree-build'Libravatar Junio C Hamano1-0/+4
Build update for "git subtree" (in contrib/) documentation pages. * ch/subtree-build: Revert "subtree: make install targets depend on build targets" subtree: make install targets depend on build targets subtree: add build targets 'man' and 'html'
2018-10-18Revert "subtree: make install targets depend on build targets"Libravatar Junio C Hamano1-3/+3
This reverts commit 744f7c4c314dc0e7816ac05520e8358c8318187a. These targets do depend on the fact that each prereq is explicitly listed via their use of $^, which I failed to notice, and broke the build.
2018-10-16subtree: make install targets depend on build targetsLibravatar Christian Hesse1-3/+3
Now that we have build targets let the install targets depend on them. Also make the targets phony. Signed-off-by: Christian Hesse <mail@eworm.de> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2018-10-12subtree: performance improvement for finding unexpected parent commitsLibravatar Roger Strain1-1/+1
After testing a previous patch at larger scale, a performance issue was detected when using git show to locate parent revisions, with a single run of the git show command taking 2 seconds or longer in a complex repo. When the command is required tens or hundreds of times in a run of the script, the additional wait time is unaccepatable. Replacing the command with git rev-parse resulted in significantly increased performance, with the command in question returning instantly. Signed-off-by: Roger Strain <rstrain@swri.org> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2018-10-10subtree: add build targets 'man' and 'html'Libravatar Christian Hesse1-0/+4
We have targets 'install-man' and 'install-html', let's add build targets as well. Signed-off-by: Christian Hesse <mail@eworm.de> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2018-10-07subtree: improve decision on merges kept in splitLibravatar Strain, Roger L1-2/+19
When multiple identical parents are detected for a commit being considered for copying, explicitly check whether one is the common merge base between the commits. If so, the other commit can be used as the identical parent; if not, a merge must be performed to maintain history. In some situations two parents of a merge commit may appear to both have identical subtree content with each other and the current commit. However, those parents can potentially come from different commit graphs. Previous behavior would simply select one of the identical parents to serve as the replacement for this commit, based on the order in which they were processed. New behavior compares the merge base between the commits to determine if a new merge commit is necessary to maintain history despite the identical content. Signed-off-by: Strain, Roger L <roger.strain@swri.org> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2018-10-07subtree: use commits before rejoins for splitsLibravatar Strain, Roger L1-6/+20
Adds recursive evaluation of parent commits which were not part of the initial commit list when performing a split. Split expects all relevant commits to be reachable from the target commit but not reachable from any previous rejoins. However, a branch could be based on a commit prior to a rejoin, then later merged back into the current code. In this case, a parent to the commit will not be present in the initial list of commits, trigging an "incorrect order" warning. Previous behavior was to consider that commit to have no parent, creating an original commit containing all subtree content. This commit is not present in an existing subtree commit graph, changing commit hashes and making pushing to a subtree repo impossible. New behavior will recursively check these unexpected parent commits to track them back to either an earlier rejoin, or a true original commit. The generated synthetic commits will properly match previously-generated commits, allowing successful pushing to a prior subtree repo. Signed-off-by: Strain, Roger L <roger.strain@swri.org> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2018-10-07subtree: make --ignore-joins pay attention to addsLibravatar Strain, Roger L1-7/+7
Changes the behavior of --ignore-joins to always consider a subtree add commit, and ignore only splits and squashes. The --ignore-joins option is documented to ignore prior --rejoin commits. However, it additionally ignored subtree add commits generated when a subtree was initially added to a repo. Due to the logic which determines whether a commit is a mainline commit or a subtree commit (namely, the presence or absence of content in the subtree prefix) this causes commits before the initial add to appear to be part of the subtree. An --ignore-joins split would therefore consider those commits part of the subtree history and include them at the beginning of the synthetic history, causing the resulting hashes to be incorrect for all later commits. Signed-off-by: Strain, Roger L <roger.strain@swri.org> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2018-10-07subtree: refactor split of a commit into standalone methodLibravatar Strain, Roger L1-36/+42
In a particularly complex repo, subtree split was not creating compatible splits for pushing back to a separate repo. Addressing one of the issues requires recursive handling of parent commits that were not initially considered by the algorithm. This commit makes no functional changes, but relocates the code to be called recursively into a new method to simply comparisons of later commits. Signed-off-by: Strain, Roger L <roger.strain@swri.org> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2018-07-30subtree test: simplify preparation of expected resultsLibravatar Jonathan Nieder1-89/+30
This mixture of quoting, pipes, and here-docs to produce expected results in shell variables is difficult to follow. Simplify by using simpler constructs that write output to files instead. Noticed because without this patch, t/chainlint is not able to understand the script in order to validate that its subshells use an unbroken &&-chain, causing "make -C contrib/subtree test" to fail with error: bug in the test script: broken &&-chain or run-away HERE-DOC: in t7900.21. Signed-off-by: Jonathan Nieder <jrnieder@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2018-07-30subtree test: add missing && to &&-chainLibravatar Jonathan Nieder1-1/+1
Detected using t/chainlint. Signed-off-by: Jonathan Nieder <jrnieder@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2018-03-08Merge branch 'sg/subtree-signed-commits'Libravatar Junio C Hamano1-6/+6
"git subtree" script (in contrib/) scripted around "git log", whose output got affected by end-user configuration like log.showsignature * sg/subtree-signed-commits: subtree: fix add and pull for GPG-signed commits
2018-02-23subtree: fix add and pull for GPG-signed commitsLibravatar Stephen R Guglielmo1-6/+6
If log.showsignature is true (or --show-signature is passed) while performing a `subtree add` or `subtree pull`, the command fails. toptree_for_commit() calls `log` and passes the output to `commit-tree`. If this output shows the GPG signature data, `commit-tree` throws a fatal error. This commit fixes the issue by adding --no-show-signature to `log` calls in a few places, as well as using the more appropriate `rev-parse` instead where possible. Signed-off-by: Stephen R Guglielmo <srg@guglielmo.us> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2018-02-14Correct mispellings of ".gitmodule" to ".gitmodules"Libravatar Robert P. J. Day1-1/+1
There are a small number of misspellings, ".gitmodule", scattered throughout the code base, correct them ... no apparent functional changes. Signed-off-by: Robert P. J. Day <rpjday@crashcourse.ca> Signed-off-by: Junio C Hamano <gitster@pobox.com>