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2015-09-06am: match --signoff to the original scripted versionLibravatar Junio C Hamano2-2/+77
Linus noticed that the recently reimplemented "git am -s" defines the trailer block too rigidly, resulting in an unnecessary blank line between the existing sign-offs and his new sign-off. An e-mail submission sent to Linus in real life ends with mixture of sign-offs and commentaries, e.g. title here message here Signed-off-by: Original Author <original@auth.or> [rv: tweaked frotz and nitfol] Signed-off-by: Re Viewer <rv@ew.er> Signed-off-by: Other Reviewer <other@rev.ewer> --- patch here Because the reimplementation reused append_signoff() helper that is used by other codepaths, which is unaware that people intermix such comments with their sign-offs in the trailer block, such a message was judged to end with a non-trailer, resulting in an extra blank line before adding a new sign-off. The original scripted version of "git am" used a lot looser definition, i.e. "if and only if there is no line that begins with Signed-off-by:, add a blank line before adding a new sign-off". For the upcoming release, stop using the append_signoff() in "git am" and reimplement the looser definition used by the scripted version to use only in "git am" to fix this regression in "am" while avoiding new regressions to other users of append_signoff(). In the longer term, we should look into loosening append_signoff() so that other codepaths that add a new sign-off behave the same way as "git am -s", but that is a task for post-release. Reported-by: Linus Torvalds <torvalds@linux-foundation.org> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2015-08-12am: let --signoff override --no-signoffLibravatar Paul Tan2-3/+45
After resolving a conflicting patch, a user may wish to sign off the patch to declare that the patch has been modified. As such, the user will expect that running "git am --signoff --continue" will append the signoff to the commit message. However, the --signoff option is only taken into account during the mail-parsing stage. If the --signoff option is set, then the signoff will be appended to the commit message. Since the mail-parsing stage comes before the patch application stage, the --signoff option, if provided on the command-line when resuming, will have no effect at all. We cannot move the append_signoff() call to the patch application stage as the applypatch-msg hook and interactive mode, which run before patch application, may expect the signoff to be there. Fix this by taking note if the user explictly set the --signoff option on the command-line, and append the signoff to the commit message when resuming if so. Signed-off-by: Paul Tan <pyokagan@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2015-08-12am: let command-line options override saved optionsLibravatar Paul Tan2-4/+94
When resuming, git-am mistakenly ignores command-line options. For instance, when a patch fails to apply with "git am patch", subsequently running "git am --3way" would not cause git-am to fall back on attempting a threeway merge. This occurs because by default the --3way option is saved as "false", and the saved am options are loaded after the command-line options are parsed, thus overwriting the command-line options when resuming. Fix this by moving the am_load() function call before parse_options(), so that command-line options will override the saved am options. The purpose of supporting this use case is to enable users to "wiggle" that one conflicting patch. As such, it is expected that the command-line options do not affect subsequent applied patches. Implement this by calling am_load() once we apply the conflicting patch successfully. Noticed-by: Junio C Hamano <gitster@pobox.com> Helped-by: Junio C Hamano <gitster@pobox.com> Helped-by: Jeff King <peff@peff.net> Signed-off-by: Paul Tan <pyokagan@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2015-08-12test_terminal: redirect child process' stdin to a ptyLibravatar Paul Tan1-4/+28
When resuming, git-am detects if we are trying to feed it patches or not by checking if stdin is a TTY. However, the test library redirects stdin to /dev/null. This makes it difficult, for instance, to test the behavior of "git am -3" when resuming, as git-am will think we are trying to feed it patches and error out. Support this use case by extending test-terminal.perl to create a pseudo-tty for the child process' standard input as well. Note that due to the way the code is structured, the child's stdin pseudo-tty will be closed when we finish reading from our stdin. This means that in the common case, where our stdin is attached to /dev/null, the child's stdin pseudo-tty will be closed immediately. Some operations like isatty(), which git-am uses, require the file descriptor to be open, and hence if the success of the command depends on such functions, test_terminal's stdin should be redirected to a source with large amount of data to ensure that the child's stdin is not closed, e.g. test_terminal git am --3way </dev/zero Cc: Jonathan Nieder <jrnieder@gmail.com> Cc: Jeff King <peff@peff.net> Signed-off-by: Paul Tan <pyokagan@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2015-08-04git-am: add am.threeWay config variableLibravatar Remi Lespinet4-2/+34
Add the am.threeWay configuration variable to use the -3 or --3way option of git am by default. When am.threeway is set and not desired for a specific git am command, the --no-3way option can be used to override it. Signed-off-by: Remi Lespinet <remi.lespinet@ensimag.grenoble-inp.fr> Signed-off-by: Paul Tan <pyokagan@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2015-08-04builtin-am: remove redirection to git-am.shLibravatar Paul Tan4-22/+1
At the beginning of the rewrite of git-am.sh to C, in order to not break existing test scripts that depended on a functional git-am, a redirection to git-am.sh was introduced that would activate if the environment variable _GIT_USE_BUILTIN_AM was not defined. Now that all of git-am.sh's functionality has been re-implemented in builtin/am.c, remove this redirection, and retire git-am.sh into contrib/examples/. Signed-off-by: Paul Tan <pyokagan@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2015-08-04builtin-am: check for valid committer identLibravatar Paul Tan1-0/+3
When commit_tree() is called, if the user does not have an explicit committer ident configured, it will attempt to construct a default committer ident based on the user's and system's info (e.g. gecos field, hostname etc.) However, if a default committer ident is unable to be constructed, commit_tree() will die(), but at this point of git-am's execution, there will already be changes made to the index and work tree. This can be confusing to new users, and as such since d64e6b0 (Keep Porcelainish from failing by broken ident after making changes., 2006-02-18) git-am.sh will check to see if the committer ident has been configured, or a default one can be constructed, before even starting to apply patches. Re-implement this in builtin/am.c. Signed-off-by: Paul Tan <pyokagan@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2015-08-04builtin-am: implement legacy -b/--binary optionLibravatar Paul Tan1-0/+7
The -b/--binary option was initially implemented in 087b674 (git-am: --binary; document --resume and --binary., 2005-11-16). The option will pass the --binary flag to git-apply to allow it to apply binary patches. However, in 2b6eef9 (Make apply --binary a no-op., 2006-09-06), --binary was been made a no-op in git-apply. Following that, since cb3a160 (git-am: ignore --binary option, 2008-08-09), the --binary option in git-am is ignored as well. In 6c15a1c (am: officially deprecate -b/--binary option, 2012-03-13), the --binary option was tweaked to its present behavior: when set, the message: The -b/--binary option has been a no-op for long time, and it will be removed. Please do not use it anymore. will be printed. Re-implement this in builtin/am.c. Signed-off-by: Paul Tan <pyokagan@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2015-08-04builtin-am: implement -i/--interactiveLibravatar Paul Tan1-1/+104
Since d1c5f2a (Add git-am, applymbox replacement., 2005-10-07), git-am.sh supported the --interactive mode. After parsing the patch mail and extracting the patch, commit message and authorship info, an interactive session will begin that allows the user to choose between: * applying the patch * applying the patch and all subsequent patches (by disabling interactive mode in subsequent patches) * skipping the patch * editing the commit message Since f89ad67 (Add [v]iew patch in git-am interactive., 2005-10-25), git-am.sh --interactive also supported viewing the patch to be applied. When --resolved-ing in --interactive mode, we need to take care to update the patch with the contents of the index, such that the correct patch will be displayed when the patch is viewed in interactive mode. Re-implement the above in builtin/am.c Signed-off-by: Paul Tan <pyokagan@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2015-08-04builtin-am: support and auto-detect mercurial patchesLibravatar Paul Tan1-1/+73
Since 0cfd112 (am: preliminary support for hg patches, 2011-08-29), git-am.sh could convert mercurial patches to an RFC2822 mail patch suitable for parsing with git-mailinfo, and queue them in the state directory for application. Since 15ced75 (git-am foreign patch support: autodetect some patch formats, 2009-05-27), git-am.sh was able to auto-detect mercurial patches by checking if the file begins with the line: # HG changeset patch Re-implement the above in builtin/am.c. Helped-by: Stefan Beller <sbeller@google.com> Signed-off-by: Paul Tan <pyokagan@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2015-08-04builtin-am: support and auto-detect StGit series filesLibravatar Paul Tan1-1/+58
Since c574e68 (git-am foreign patch support: StGIT support, 2009-05-27), git-am.sh is able to read a single StGit series file and, for each StGit patch listed in the file, convert the StGit patch into a RFC2822 mail patch suitable for parsing with git-mailinfo, and queue them in the state directory for applying. Since 15ced75 (git-am foreign patch support: autodetect some patch formats, 2009-05-27), git-am.sh is able to auto-detect StGit series files by checking to see if the file starts with the string: # This series applies on GIT commit Re-implement the above in builtin/am.c. Signed-off-by: Paul Tan <pyokagan@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2015-08-04builtin-am: support and auto-detect StGit patchesLibravatar Paul Tan1-1/+131
Since c574e68 (git-am foreign patch support: StGIT support, 2009-05-27), git-am.sh supported converting StGit patches into RFC2822 mail patches that can be parsed with git-mailinfo. Implement this by introducing two functions in builtin/am.c: stgit_patch_to_mail() and split_mail_conv(). stgit_patch_to_mail() is a callback function for split_mail_conv(), and contains the logic for converting an StGit patch into an RFC2822 mail patch. split_mail_conv() implements the logic to go through each file in the `paths` list, reading from stdin where specified, and calls the callback function to write the converted patch to the corresponding output file in the state directory. This interface should be generic enough to support other foreign patch formats in the future. Since 15ced75 (git-am foreign patch support: autodetect some patch formats, 2009-05-27), git-am.sh is able to auto-detect StGit patches. Re-implement this in builtin/am.c. Helped-by: Eric Sunshine <sunshine@sunshineco.com> Signed-off-by: Paul Tan <pyokagan@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2015-08-04builtin-am: rerere supportLibravatar Paul Tan1-0/+25
git-am.sh will call git-rerere at the following events: * "git rerere" when a three-way merge fails to record the conflicted automerge results. Since 8389b52 (git-rerere: reuse recorded resolve., 2006-01-28) * Since cb6020b (Teach --[no-]rerere-autoupdate option to merge, revert and friends, 2009-12-04), git-am.sh supports the --[no-]rerere-autoupdate option as well, and would pass it to git-rerere. * "git rerere" when --resolved, to record the hand resolution. Since f131dd4 (rerere: record (or avoid misrecording) resolved, skipped or aborted rebase/am, 2006-12-08) * "git rerere clear" when --skip-ing. Since f131dd4 (rerere: record (or avoid misrecording) resolved, skipped or aborted rebase/am, 2006-12-08) * "git rerere clear" when --abort-ing. Since 3e5057a (git am --abort, 2008-07-16) Re-implement the above in builtin/am.c. Signed-off-by: Paul Tan <pyokagan@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2015-08-04builtin-am: invoke post-applypatch hookLibravatar Paul Tan1-0/+2
Since d1c5f2a (Add git-am, applymbox replacement., 2005-10-07), git-am.sh will invoke the post-applypatch hook after the patch is applied and a commit is made. The exit code of the hook is ignored. Re-implement this in builtin/am.c. Signed-off-by: Paul Tan <pyokagan@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2015-08-04builtin-am: invoke pre-applypatch hookLibravatar Paul Tan1-0/+3
Since d1c5f2a (Add git-am, applymbox replacement., 2005-10-07), git-am.sg will invoke the pre-applypatch hook after applying the patch to the index, but before a commit is made. Should the hook exit with a non-zero status, git am will exit. Re-implement this in builtin/am.c. Signed-off-by: Paul Tan <pyokagan@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2015-08-04builtin-am: invoke applypatch-msg hookLibravatar Paul Tan1-0/+24
Since d1c5f2a (Add git-am, applymbox replacement., 2005-10-07), git-am.sh will invoke the applypatch-msg hooks just after extracting the patch message. If the applypatch-msg hook exits with a non-zero status, git-am.sh abort before even applying the patch to the index. Re-implement this in builtin/am.c. Signed-off-by: Paul Tan <pyokagan@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2015-08-04builtin-am: support automatic notes copyingLibravatar Paul Tan1-0/+60
Since eb2151b (rebase: support automatic notes copying, 2010-03-12), git-am.sh supported automatic notes copying in --rebasing mode by invoking "git notes copy" once it has finished applying all the patches. Re-implement this feature in builtin/am.c. Signed-off-by: Paul Tan <pyokagan@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2015-08-04builtin-am: invoke post-rewrite hookLibravatar Paul Tan1-0/+55
Since 96e1948 (rebase: invoke post-rewrite hook, 2010-03-12), git-am.sh will invoke the post-rewrite hook after it successfully finishes applying all the queued patches. To do this, when parsing a mail to extract its patch and metadata, in --rebasing mode git-am.sh will also store the original commit ID in the $state_dir/original-commit file. Once it applies and commits the patch, the original commit ID, and the new commit ID, will be appended to the $state_dir/rewritten file. Once all of the queued mail have been processed, git-am.sh will then invoke the post-rewrite hook with the contents of the $state_dir/rewritten file. Re-implement this in builtin/am.c. Signed-off-by: Paul Tan <pyokagan@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2015-08-04builtin-am: implement -S/--gpg-sign, commit.gpgsignLibravatar Paul Tan1-1/+10
Since 3b4e395 (am: add the --gpg-sign option, 2014-02-01), git-am.sh supported the --gpg-sign option, and would pass it to git-commit-tree, thus GPG-signing the commit object. Re-implement this option in builtin/am.c. git-commit-tree would also sign the commit by default if the commit.gpgsign setting is true. Since we do not run commit-tree, we re-implement this behavior by handling the commit.gpgsign setting ourselves. Helped-by: Stefan Beller <sbeller@google.com> Signed-off-by: Paul Tan <pyokagan@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2015-08-04builtin-am: implement --committer-date-is-author-dateLibravatar Paul Tan1-0/+8
Since 3f01ad6 (am: Add --committer-date-is-author-date option, 2009-01-22), git-am.sh implemented the --committer-date-is-author-date option, which tells git-am to use the timestamp recorded in the email message as both author and committer date. Re-implement this option in builtin/am.c. Signed-off-by: Paul Tan <pyokagan@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2015-08-04builtin-am: implement --ignore-dateLibravatar Paul Tan1-1/+5
Since a79ec62 (git-am: Add --ignore-date option, 2009-01-24), git-am.sh supported the --ignore-date option, and would use the current timestamp instead of the one provided in the patch if the option was set. Re-implement this option in builtin/am.c. Signed-off-by: Paul Tan <pyokagan@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2015-08-04builtin-am: pass git-apply's options to git-applyLibravatar Paul Tan1-0/+45
git-am.sh recognizes some of git-apply's options, and would pass them to git-apply: * --whitespace, since 8c31cb8 (git-am: --whitespace=x option., 2006-02-28) * -C, since 67dad68 (add -C[NUM] to git-am, 2007-02-08) * -p, since 2092a1f (Teach git-am to pass -p option down to git-apply, 2007-02-11) * --directory, since b47dfe9 (git-am: add --directory=<dir> option, 2009-01-11) * --reject, since b80da42 (git-am: implement --reject option passed to git-apply, 2009-01-23) * --ignore-space-change, --ignore-whitespace, since 86c91f9 (git apply: option to ignore whitespace differences, 2009-08-04) * --exclude, since 77e9e49 (am: pass exclude down to apply, 2011-08-03) * --include, since 58725ef (am: support --include option, 2012-03-28) * --reject, since b80da42 (git-am: implement --reject option passed to git-apply, 2009-01-23) Re-implement support for these options in builtin/am.c. Signed-off-by: Paul Tan <pyokagan@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2015-08-04builtin-am: implement --[no-]scissorsLibravatar Paul Tan1-0/+48
Since 017678b (am/mailinfo: Disable scissors processing by default, 2009-08-26), git-am supported the --[no-]scissors option, passing it to git-mailinfo. Re-implement support for this option in builtin/am.c. Since the default setting of --scissors in git-mailinfo can be configured with mailinfo.scissors (and perhaps through other settings in the future), to be safe we make an explicit distinction between SCISSORS_UNSET, SCISSORS_TRUE and SCISSORS_FALSE. Signed-off-by: Paul Tan <pyokagan@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2015-08-04builtin-am: support --keep-cr, am.keepcrLibravatar Paul Tan1-6/+23
Since ad2c928 (git-am: Add command line parameter `--keep-cr` passing it to git-mailsplit, 2010-02-27), git-am.sh supported the --keep-cr option and would pass it to git-mailsplit. Since e80d4cb (git-am: Add am.keepcr and --no-keep-cr to override it, 2010-02-27), git-am.sh supported the am.keepcr config setting, which controls whether --keep-cr is on by default. Re-implement the above in builtin/am.c. Signed-off-by: Paul Tan <pyokagan@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2015-08-04builtin-am: implement --[no-]message-id, am.messageidLibravatar Paul Tan1-0/+13
Since a078f73 (git-am: add --message-id/--no-message-id, 2014-11-25), git-am.sh supported the --[no-]message-id options, and the "am.messageid" setting which specifies the default option. --[no-]message-id tells git-am whether or not the -m option should be passed to git-mailinfo. Re-implement this option in builtin/am.c. Signed-off-by: Paul Tan <pyokagan@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2015-08-04builtin-am: implement -k/--keep, --keep-non-patchLibravatar Paul Tan1-0/+50
Since d1c5f2a (Add git-am, applymbox replacement., 2005-10-07), git-am.sh supported the -k/--keep option to pass the -k option to git-mailsplit. Since f7e5ea1 (am: learn passing -b to mailinfo, 2012-01-16), git-am.sh supported the --keep-non-patch option to pass the -b option to git-mailsplit. Re-implement these two options in builtin/am.c. Signed-off-by: Paul Tan <pyokagan@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2015-08-04builtin-am: implement -u/--utf8Libravatar Paul Tan1-0/+11
Since d1c5f2a (Add git-am, applymbox replacement., 2005-10-07), git-am.sh supported the -u,--utf8 option. If set, the -u option will be passed to git-mailinfo to re-code the commit log message and authorship in the charset specified by i18n.commitencoding. If unset, the -n option will be passed to git-mailinfo, which disables the re-encoding. Since d84029b (--utf8 is now default for 'git-am', 2007-01-08), --utf8 is specified by default in git-am.sh. Re-implement the above in builtin/am.c. Signed-off-by: Paul Tan <pyokagan@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2015-08-04builtin-am: handle stray state directoryLibravatar Paul Tan1-0/+17
Should git-am terminate unexpectedly between the point where the state directory is created, but the "next" and "last" files are not written yet, a stray state directory will be left behind. As such, since b141f3c (am: handle stray $dotest directory, 2013-06-15), git-am.sh explicitly recognizes such a stray directory, and allows the user to remove it with am --abort. Re-implement this feature in builtin/am.c. Signed-off-by: Paul Tan <pyokagan@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2015-08-04builtin-am: bypass git-mailinfo when --rebasingLibravatar Paul Tan1-1/+133
Since 5e835ca (rebase: do not munge commit log message, 2008-04-16), git am --rebasing no longer gets the commit log message from the patch, but reads it directly from the commit identified by the "From " header line. Since 43c2325 (am: use get_author_ident_from_commit instead of mailinfo when rebasing, 2010-06-16), git am --rebasing also gets the author name, email and date directly from the commit. Since 0fbb95d (am: don't call mailinfo if $rebasing, 2012-06-26), git am --rebasing does not use git-mailinfo to get the patch body, but rather generates it directly from the commit itself. The above 3 commits introduced a separate parse_mail() code path in git-am.sh's --rebasing mode that bypasses git-mailinfo. Re-implement this code path in builtin/am.c as parse_mail_rebase(). Signed-off-by: Paul Tan <pyokagan@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2015-08-04builtin-am: implement --rebasing modeLibravatar Paul Tan1-4/+26
Since 3041c32 (am: --rebasing, 2008-03-04), git-am.sh supported the --rebasing option, which is used internally by git-rebase to tell git-am that it is being used for its purpose. It would create the empty file $state_dir/rebasing to help "completion" scripts tell if the ongoing operation is am or rebase. As of 0fbb95d (am: don't call mailinfo if $rebasing, 2012-06-26), --rebasing also implies --3way as well. Since a1549e1 (am: return control to caller, for housekeeping, 2013-05-12), git-am.sh would only clean up the state directory when it is not --rebasing, instead deferring cleanup to git-rebase.sh. Re-implement the above in builtin/am.c. Signed-off-by: Paul Tan <pyokagan@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2015-08-04builtin-am: implement --3wayLibravatar Paul Tan1-4/+150
Since d1c5f2a (Add git-am, applymbox replacement., 2005-10-07), git-am.sh supported the --3way option, and if set, would attempt to do a 3-way merge if the initial patch application fails. Since 5d86861 (am -3: list the paths that needed 3-way fallback, 2012-03-28), in a 3-way merge git-am.sh would list the paths that needed 3-way fallback, so that the user can review them more carefully to spot mismerges. Re-implement the above in builtin/am.c. Signed-off-by: Paul Tan <pyokagan@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2015-08-04cache-tree: introduce write_index_as_tree()Libravatar Paul Tan2-12/+18
A caller may wish to write a temporary index as a tree. However, write_cache_as_tree() assumes that the index was read from, and will write to, the default index file path. Introduce write_index_as_tree() which removes this limitation by allowing the caller to specify its own index_state and index file path. Signed-off-by: Paul Tan <pyokagan@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2015-08-04builtin-am: implement -s/--signoffLibravatar Paul Tan1-0/+12
Since d1c5f2a (Add git-am, applymbox replacement., 2005-10-07), git-am supported the --signoff option which will append a signoff at the end of the commit messsage. Re-implement this feature in parse_mail() by calling append_signoff() if the option is set. Signed-off-by: Paul Tan <pyokagan@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2015-08-04builtin-am: exit with user friendly message on failureLibravatar Paul Tan1-4/+26
Since ced9456 (Give the user a hint for how to continue in the case that git-am fails because it requires user intervention, 2006-05-02), git-am prints additional information on how the user can re-invoke git-am to resume patch application after resolving the failure. Re-implement this through the die_user_resolve() function. Since cc12005 (Make git rebase interactive help match documentation., 2006-05-13), git-am supports the --resolvemsg option which is used by git-rebase to override the message printed out when git-am fails. Re-implement this option. Signed-off-by: Paul Tan <pyokagan@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2015-08-04builtin-am: implement -q/--quietLibravatar Paul Tan1-3/+28
Since 0e987a1 (am, rebase: teach quiet option, 2009-06-16), git-am supported the --quiet option, and when told to be quiet, would only speak on failure. Re-implement this by introducing the say() function, which works like fprintf_ln(), but would only write to the stream when state->quiet is false. Signed-off-by: Paul Tan <pyokagan@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2015-08-04builtin-am: reject patches when there's a session in progressLibravatar Paul Tan1-0/+15
Since d1c5f2a (Add git-am, applymbox replacement., 2005-10-07), git-am would error out if the user gave it mbox(s) on the command-line, but there was a session in progress. Since c95b138 (Fix git-am safety checks, 2006-09-15), git-am would detect if the user attempted to feed it a mbox via stdin, by checking if stdin is not a tty and there is no resume command given. Re-implement the above two safety checks. Signed-off-by: Paul Tan <pyokagan@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2015-08-04builtin-am: implement --abortLibravatar Paul Tan1-3/+100
Since 3e5057a (git am --abort, 2008-07-16), git-am supported the --abort option that will rewind HEAD back to the original commit. Re-implement this through am_abort(). Since 7b3b7e3 (am --abort: keep unrelated commits since the last failure and warn, 2010-12-21), to prevent commits made since the last failure from being lost, git-am will not rewind HEAD back to the original commit if HEAD moved since the last failure. Re-implement this through safe_to_abort(). Helped-by: Stefan Beller <sbeller@google.com> Signed-off-by: Paul Tan <pyokagan@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2015-08-04builtin-am: implement --skipLibravatar Paul Tan1-2/+121
Since d1c5f2a (Add git-am, applymbox replacement., 2005-10-07), git-am supported resuming from a failed patch application by skipping the current patch. Re-implement this feature by introducing am_skip(). Helped-by: Stefan Beller <sbeller@google.com> Signed-off-by: Paul Tan <pyokagan@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2015-08-04builtin-am: don't parse mail when resumingLibravatar Paul Tan1-9/+25
Since 271440e (git-am: make it easier after fixing up an unapplicable patch., 2005-10-25), when "git am" is run again after being paused, the current mail message will not be re-parsed, but instead the contents of the state directory's patch, msg and author-script files will be used as-is instead. Re-implement this in builtin/am.c. Signed-off-by: Paul Tan <pyokagan@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2015-08-04builtin-am: implement --resolved/--continueLibravatar Paul Tan1-1/+71
Since 0c15cc9 (git-am: --resolved., 2005-11-16), git-am supported resuming from a failed patch application. The user will manually apply the patch, and the run git am --resolved which will then commit the resulting index. Re-implement this feature by introducing am_resolve(). Since it makes no sense for the user to run am --resolved when there is no session in progress, we error out in this case. Signed-off-by: Paul Tan <pyokagan@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2015-08-04builtin-am: refuse to apply patches if index is dirtyLibravatar Paul Tan1-0/+45
Since d1c5f2a (Add git-am, applymbox replacement., 2005-10-07), git-am will refuse to apply patches if the index is dirty. Re-implement this behavior in builtin/am.c. Signed-off-by: Paul Tan <pyokagan@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2015-08-04builtin-am: implement committing applied patchLibravatar Paul Tan1-4/+51
Implement do_commit(), which commits the index which contains the results of applying the patch, along with the extracted commit message and authorship information. Since 29b6754 (am: remove rebase-apply directory before gc, 2010-02-22), git gc --auto is also invoked to pack the loose objects that are created from making the commits. Signed-off-by: Paul Tan <pyokagan@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2015-08-04builtin-am: apply patch with git-applyLibravatar Paul Tan1-1/+71
Implement applying the patch to the index using git-apply. If a file is unchanged but stat-dirty, git-apply may erroneously fail to apply patches, thinking that they conflict with a dirty working tree. As such, since 2a6f08a (am: refresh the index at start and --resolved, 2011-08-15), git-am will refresh the index before applying patches. Re-implement this behavior. Helped-by: Junio C Hamano <gitster@pobox.com> Signed-off-by: Paul Tan <pyokagan@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2015-08-04builtin-am: extract patch and commit info with git-mailinfoLibravatar Paul Tan1-0/+317
For the purpose of applying the patch and committing the results, implement extracting the patch data, commit message and authorship from an e-mail message using git-mailinfo. git-mailinfo is run as a separate process, but ideally in the future, we should be be able to access its functionality directly without spawning a new process. Helped-by: Junio C Hamano <gitster@pobox.com> Helped-by: Jeff King <peff@peff.net> Helped-by: Johannes Schindelin <johannes.schindelin@gmx.de> Signed-off-by: Paul Tan <pyokagan@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2015-08-04builtin-am: auto-detect mbox patchesLibravatar Paul Tan1-0/+109
Since 15ced75 (git-am foreign patch support: autodetect some patch formats, 2009-05-27), git-am.sh is able to autodetect mbox, stgit and mercurial patches through heuristics. Re-implement support for autodetecting mbox/maildir files in builtin/am.c. RFC 2822 requires that lines are terminated by "\r\n". To support this, implement strbuf_getline_crlf(), which will remove both '\n' and "\r\n" from the end of the line. Helped-by: Junio C Hamano <gitster@pobox.com> Helped-by: Eric Sunshine <sunshine@sunshineco.com> Helped-by: Johannes Schindelin <johannes.schindelin@gmx.de> Signed-off-by: Paul Tan <pyokagan@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2015-08-04builtin-am: split out mbox/maildir patches with git-mailsplitLibravatar Paul Tan1-3/+104
git-am.sh supports mbox, stgit and mercurial patches. Re-implement support for splitting out mbox/maildirs using git-mailsplit, while also implementing the framework required to support other patch formats in the future. Re-implement support for the --patch-format option (since a5a6755 (git-am foreign patch support: introduce patch_format, 2009-05-27)) to allow the user to choose between the different patch formats. Helped-by: Junio C Hamano <gitster@pobox.com> Signed-off-by: Paul Tan <pyokagan@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2015-08-04builtin-am: implement patch queue mechanismLibravatar Paul Tan1-0/+177
git-am applies a series of patches. If the process terminates abnormally, we want to be able to resume applying the series of patches. This requires the session state to be saved in a persistent location. Implement the mechanism of a "patch queue", represented by 2 integers -- the index of the current patch we are applying and the index of the last patch, as well as its lifecycle through the following functions: * am_setup(), which will set up the state directory $GIT_DIR/rebase-apply. As such, even if the process exits abnormally, the last-known state will still persist. * am_load(), which is called if there is an am session in progress, to load the last known state from the state directory so we can resume applying patches. * am_run(), which will do the actual patch application. After applying a patch, it calls am_next() to increment the current patch index. The logic for applying and committing a patch is not implemented yet. * am_destroy(), which is finally called when we successfully applied all the patches in the queue, to clean up by removing the state directory and its contents. Helped-by: Junio C Hamano <gitster@pobox.com> Helped-by: Stefan Beller <sbeller@google.com> Helped-by: Johannes Schindelin <johannes.schindelin@gmx.de> Signed-off-by: Paul Tan <pyokagan@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2015-08-04builtin-am: implement skeletal builtin amLibravatar Paul Tan4-0/+37
For the purpose of rewriting git-am.sh into a C builtin, implement a skeletal builtin/am.c that redirects to $GIT_EXEC_PATH/git-am if the environment variable _GIT_USE_BUILTIN_AM is not defined. Since in the Makefile git-am.sh takes precedence over builtin/am.c, $GIT_EXEC_PATH/git-am will contain the shell script git-am.sh, and thus this allows us to fall back on the functional git-am.sh when running the test suite for tests that depend on a working git-am implementation. Since git-am.sh cannot handle any environment modifications by setup_git_directory(), "am" is declared with no setup flags in git.c. On the other hand, to re-implement git-am.sh in builtin/am.c, we need to run all the git dir and work tree setup logic that git.c typically does for us. As such, we work around this temporarily by copying the logic in git.c's run_builtin(), which is roughly: prefix = setup_git_directory(); trace_repo_setup(prefix); setup_work_tree(); This redirection should be removed when all the features of git-am.sh have been re-implemented in builtin/am.c. Helped-by: Junio C Hamano <gitster@pobox.com> Signed-off-by: Paul Tan <pyokagan@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2015-08-04wrapper: implement xfopen()Libravatar Paul Tan2-0/+22
A common usage pattern of fopen() is to check if it succeeded, and die() if it failed: FILE *fp = fopen(path, "w"); if (!fp) die_errno(_("could not open '%s' for writing"), path); Implement a wrapper function xfopen() for the above, so that we can save a few lines of code and make the die() messages consistent. Helped-by: Jeff King <peff@peff.net> Helped-by: Johannes Schindelin <johannes.schindelin@gmx.de> Helped-by: Junio C Hamano <gitster@pobox.com> Signed-off-by: Paul Tan <pyokagan@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2015-08-04wrapper: implement xopen()Libravatar Paul Tan2-0/+36
A common usage pattern of open() is to check if it was successful, and die() if it was not: int fd = open(path, O_WRONLY | O_CREAT, 0777); if (fd < 0) die_errno(_("Could not open '%s' for writing."), path); Implement a wrapper function xopen() that does the above so that we can save a few lines of code, and make the die() messages consistent. Helped-by: Torsten Bögershausen <tboegi@web.de> Helped-by: Jeff King <peff@peff.net> Helped-by: Johannes Schindelin <johannes.schindelin@gmx.de> Helped-by: Junio C Hamano <gitster@pobox.com> Signed-off-by: Paul Tan <pyokagan@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>