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2011-08-04revert: Save data for continuing after conflict resolutionLibravatar Ramkumar Ramachandra1-4/+130
Ever since v1.7.2-rc1~4^2~7 (revert: allow cherry-picking more than one commit, 2010-06-02), a single invocation of "git cherry-pick" or "git revert" can perform picks of several individual commits. To implement features like "--continue" to continue the whole operation, we will need to store some information about the state and the plan at the beginning. Introduce a ".git/sequencer/head" file to store this state, and ".git/sequencer/todo" file to store the plan. The head file contains the SHA-1 of the HEAD before the start of the operation, and the todo file contains an instruction sheet whose format is inspired by the format of the "rebase -i" instruction sheet. As a result, a typical todo file looks like: pick 8537f0e submodule add: test failure when url is not configured pick 4d68932 submodule add: allow relative repository path pick f22a17e submodule add: clean up duplicated code pick 59a5775 make copy_ref globally available Since SHA-1 hex is abbreviated using an find_unique_abbrev(), it is unambiguous. This does not guarantee that there will be no ambiguity when more objects are added to the repository. These two files alone are not enough to implement a "--continue" that remembers the command-line options specified; later patches in the series save them too. These new files are unrelated to the existing .git/CHERRY_PICK_HEAD, which will still be useful while committing after a conflict resolution. Inspired-by: Christian Couder <chriscool@tuxfamily.org> Helped-by: Junio C Hamano <gitster@pobox.com> Helped-by: Jonathan Nieder <jrnieder@gmail.com> Signed-off-by: Ramkumar Ramachandra <artagnon@gmail.com> Signed-off-by: Jonathan Nieder <jrnieder@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2011-08-04revert: Don't create invalid replay_opts in parse_argsLibravatar Ramkumar Ramachandra1-11/+27
The "--ff" command-line option cannot be used with some other command-line options. However, parse_args still parses these incompatible options into a replay_opts structure for use by the rest of the program. Although pick_commits, the current gatekeeper to the cherry-pick machinery, checks the validity of the replay_opts structure before before starting its operation, there will be multiple entry points to the cherry-pick machinery in future. To futureproof the code and catch these errors in one place, make sure that an invalid replay_opts structure is not created by parse_args in the first place. We still check the replay_opts structure for validity in pick_commits, but this is an assert() now to emphasize that it's the caller's responsibility to get it right. Inspired-by: Christian Couder <chriscool@tuxfamily.org> Mentored-by: Jonathan Nieder <jrnieder@gmail.com> Helped-by: Junio C Hamano <gitster@pobox.com> Signed-off-by: Ramkumar Ramachandra <artagnon@gmail.com> Signed-off-by: Jonathan Nieder <jrnieder@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2011-08-04revert: Separate cmdline parsing from functional codeLibravatar Ramkumar Ramachandra1-7/+7
Currently, revert_or_cherry_pick sets up a default git config, parses command-line arguments, before preparing to pick commits. This makes for a bad API as the central worry of callers is to assert whether or not a conflict occured while cherry picking. The current API is like: if (revert_or_cherry_pick(argc, argv, opts) < 0) print "Something failed, we're not sure what" Simplify and rename revert_or_cherry_pick to pick_commits so that it only has the responsibility of setting up the revision walker and picking commits in a loop. Transfer the remaining work to its callers. Now, the API is simplified as: if (parse_args(argc, argv, opts) < 0) print "Can't parse arguments" if (pick_commits(opts) < 0) print "Error encountered in picking machinery" Later in the series, pick_commits will also serve as the starting point for continuing a cherry-pick or revert. Inspired-by: Christian Couder <chriscool@tuxfamily.org> Helped-by: Jonathan Nieder <jrnieder@gmail.com> Signed-off-by: Ramkumar Ramachandra <artagnon@gmail.com> Signed-off-by: Jonathan Nieder <jrnieder@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2011-08-04revert: Introduce struct to keep command-line optionsLibravatar Ramkumar Ramachandra1-88/+113
The current code uses a set of file-scope static variables to tell the cherry-pick/ revert machinery how to replay the changes, and initializes them by parsing the command-line arguments. In later steps in this series, we would like to introduce an API function that calls into this machinery directly and have a way to tell it what to do. Hence, introduce a structure to group these variables, so that the API can take them as a single replay_options parameter. The only exception is the variable "me" -- remove it since it not an independent option, and can be inferred from the action. Unfortunately, this patch introduces a minor regression. Parsing strategy-option violates a C89 rule: Initializers cannot refer to variables whose address is not known at compile time. Currently, this rule is violated by some other parts of Git as well, and it is possible to get GCC to report these instances using the "-std=c89 -pedantic" option. Inspired-by: Christian Couder <chriscool@tuxfamily.org> Mentored-by: Jonathan Nieder <jrnieder@gmail.com> Helped-by: Junio C Hamano <gitster@pobox.com> Signed-off-by: Ramkumar Ramachandra <artagnon@gmail.com> Signed-off-by: Jonathan Nieder <jrnieder@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2011-08-04revert: Eliminate global "commit" variableLibravatar Ramkumar Ramachandra1-11/+11
Functions which act on commits currently rely on a file-scope static variable to be set before they're called. Consequently, the API and corresponding callsites are ugly and unclear. Remove this variable and change their API to accept the commit to act on as additional argument so that the callsites change from looking like commit = prepare_a_commit(); act_on_commit(); to looking like commit = prepare_a_commit(); act_on_commit(commit); This change is also in line with our long-term goal of exposing some of these functions through a public API. Inspired-by: Christian Couder <chriscool@tuxfamily.org> Helped-by: Junio C Hamano <gitster@pobox.com> Signed-off-by: Ramkumar Ramachandra <artagnon@gmail.com> Signed-off-by: Jonathan Nieder <jrnieder@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2011-08-04revert: Rename no_replay to record_originLibravatar Ramkumar Ramachandra1-4/+4
The "-x" command-line option is used to record the name of the original commits being picked in the commit message. The variable corresponding to this option is named "no_replay" for historical reasons; the name is especially confusing because the term "replay" is used to describe what cherry-pick does (for example, in the documentation of the "--mainline" option). So, give the variable corresponding to the "-x" command-line option a better name: "record_origin". Mentored-by: Jonathan Nieder <jrnieder@gmail.com> Signed-off-by: Ramkumar Ramachandra <artagnon@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2011-08-04revert: Don't check lone argument in get_encodingLibravatar Ramkumar Ramachandra1-3/+0
The only place get_encoding uses the global "commit" variable is when writing an error message explaining that its lone argument was NULL. Since the function's only caller ensures that a NULL argument isn't passed, we can remove this check with two beneficial consequences: 1. Since the function doesn't use the global "commit" variable any more, it won't need to change when we eliminate the global variable later in the series. 2. Translators no longer need to localize an error message that will never be shown. Suggested-by: Junio C Hamano <gitster@pobox.com> Mentored-by: Jonathan Nieder <jrnieder@gmail.com> Signed-off-by: Ramkumar Ramachandra <artagnon@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2011-08-04revert: Simplify and inline add_message_to_msgLibravatar Ramkumar Ramachandra1-14/+14
The add_message_to_msg function has some dead code, an unclear API, only one callsite. While it originally intended fill up an empty commit message with the commit object name while picking, it really doesn't do this -- a bug introduced in v1.5.1-rc1~65^2~2 (Make git-revert & git-cherry-pick a builtin, 2007-03-01). Today, tests in t3505-cherry-pick-empty.sh indicate that not filling up an empty commit message is the desired behavior. Re-implement and inline the function accordingly, with a beneficial side-effect: don't dereference a NULL pointer when the commit doesn't have a delimeter after the header. Helped-by: Junio C Hamano <gitster@pobox.com> Mentored-by: Jonathan Nieder <jrnieder@gmail.com> Signed-off-by: Ramkumar Ramachandra <artagnon@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2011-08-04advice: Introduce error_resolve_conflictLibravatar Ramkumar Ramachandra1-9/+0
Enable future callers to report a conflict and not die immediately by introducing a new function called error_resolve_conflict. Re-implement die_resolve_conflict as a call to error_resolve_conflict followed by a call to die. Consequently, the message printed by die_resolve_conflict changes from fatal: 'commit' is not possible because you have unmerged files. Please, fix them up in the work tree ... ... to error: 'commit' is not possible because you have unmerged files. hint: Fix them up in the work tree ... hint: ... fatal: Exiting because of an unresolved conflict. Hints are printed using the same advise function introduced in v1.7.3-rc0~26^2~3 (Introduce advise() to print hints, 2010-08-11). Inspired-by: Christian Couder <chistian.couder@gmail.com> Helped-by: Jonathan Nieder <jrnieder@gmail.com> Reviewed-by: Jonathan Nieder <jrnieder@gmail.com> Signed-off-by: Ramkumar Ramachandra <artagnon@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2011-06-20plug a few coverity-spotted leaksLibravatar Jim Meyering3-1/+6
Signed-off-by: Jim Meyering <meyering@redhat.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2011-06-19Merge branch 'maint'Libravatar Junio C Hamano1-1/+1
* maint: builtin/gc.c: add missing newline in message
2011-06-19builtin/gc.c: add missing newline in messageLibravatar Andreas Schwab1-1/+1
Signed-off-by: Andreas Schwab <schwab@linux-m68k.org> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2011-06-08Merge branch 'maint'Libravatar Junio C Hamano1-2/+4
* maint: fetch: do not leak a refspec
2011-06-08fetch: do not leak a refspecLibravatar Jim Meyering1-2/+4
Signed-off-by: Jim Meyering <meyering@redhat.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2011-06-06Merge branch 'bc/maint-status-z-to-use-porcelain'Libravatar Junio C Hamano1-3/+4
* bc/maint-status-z-to-use-porcelain: builtin/commit.c: set status_format _after_ option parsing t7508: demonstrate status's failure to use --porcelain format with -z Conflicts: builtin/commit.c
2011-05-31Merge branch 'jk/format-patch-am'Libravatar Junio C Hamano8-28/+25
* jk/format-patch-am: format-patch: preserve subject newlines with -k clean up calling conventions for pretty.c functions pretty: add pp_commit_easy function for simple callers mailinfo: always clean up rfc822 header folding t: test subject handling in format-patch / am pipeline Conflicts: builtin/branch.c builtin/log.c commit.h
2011-05-31Merge branch 'jc/log-quiet-fix'Libravatar Junio C Hamano1-0/+2
* jc/log-quiet-fix: log: --quiet should serve as synonym to -s
2011-05-31Merge branch 'jk/maint-remote-mirror-safer'Libravatar Junio C Hamano1-2/+2
* jk/maint-remote-mirror-safer: remote: allow "-t" with fetch mirrors
2011-05-31Merge branch 'jl/read-tree-m-dry-run'Libravatar Junio C Hamano1-1/+2
* jl/read-tree-m-dry-run: Teach read-tree the -n|--dry-run option unpack-trees: add the dry_run flag to unpack_trees_options
2011-05-31Merge branch 'ab/i18n-fixup' into maintLibravatar Junio C Hamano4-20/+32
* ab/i18n-fixup: (24 commits) i18n: use test_i18n{cmp,grep} in t7600, t7607, t7611 and t7811 i18n: use test_i18n{grep,cmp} in t7508 i18n: use test_i18ngrep in t7506 i18n: use test_i18ngrep and test_i18ncmp in t7502 i18n: use test_i18ngrep in t7501 i18n: use test_i18ncmp in t7500 i18n: use test_i18ngrep in t7201 i18n: use test_i18ncmp and test_i18ngrep in t7102 and t7110 i18n: use test_i18ncmp and test_i18ngrep in t5541, t6040, t6120, t7004, t7012 and t7060 i18n: use test_i18ncmp and test_i18ngrep in t3700, t4001 and t4014 i18n: use test_i18ncmp and test_i18ngrep in t3203, t3501 and t3507 i18n: use test_i18ngrep in t2020, t2204, t3030, and t3200 i18n: use test_i18ngrep in lib-httpd and t2019 i18n: do not overuse C_LOCALE_OUTPUT (grep) i18n: use test_i18ncmp in t1200 and t2200 i18n: .git file is not a human readable message (t5601) i18n: do not overuse C_LOCALE_OUTPUT i18n: mark init-db messages for translation i18n: mark checkout plural warning for translation i18n: mark checkout --detach messages for translation ...
2011-05-31Merge branch 'jc/rename-degrade-cc-to-c' into maintLibravatar Junio C Hamano3-4/+21
* jc/rename-degrade-cc-to-c: diffcore-rename: fall back to -C when -C -C busts the rename limit diffcore-rename: record filepair for rename src diffcore-rename: refactor "too many candidates" logic builtin/diff.c: remove duplicated call to diff_result_code()
2011-05-30Merge branch 'mk/grep-pcre'Libravatar Junio C Hamano1-9/+43
* mk/grep-pcre: git-grep: Fix problems with recently added tests git-grep: Update tests (mainly for -P) Makefile: Pass USE_LIBPCRE down in GIT-BUILD-OPTIONS git-grep: update tests now regexp type is "last one wins" git-grep: do not die upon -F/-P when grep.extendedRegexp is set. git-grep: Bail out when -P is used with -F or -E grep: Add basic tests configure: Check for libpcre git-grep: Learn PCRE grep: Extract compile_regexp_failed() from compile_regexp() grep: Fix a typo in a comment grep: Put calls to fixmatch() and regmatch() into patmatch() contrib/completion: --line-number to git grep Documentation: Add --line-number to git-grep synopsis
2011-05-29Merge branch 'jc/notes-batch-removal'Libravatar Junio C Hamano2-22/+43
* jc/notes-batch-removal: show: --ignore-missing notes remove: --stdin reads from the standard input notes remove: --ignore-missing notes remove: allow removing more than one
2011-05-29Merge branch 'jk/haves-from-alternate-odb'Libravatar Junio C Hamano2-4/+14
* jk/haves-from-alternate-odb: receive-pack: eliminate duplicate .have refs bisect: refactor sha1_array into a generic sha1 list refactor refs_from_alternate_cb to allow passing extra data
2011-05-28log: --quiet should serve as synonym to -sLibravatar Junio C Hamano1-0/+2
The previous commit simply hijacked --quiet and essentially made it into a no-op. Instead, take it as a cue that the end user wants to omit the patch output from commands that default to show patches, e.g. "show". Signed-off-by: Junio C Hamano <gitster@pobox.com>
2011-05-26format-patch: preserve subject newlines with -kLibravatar Jeff King1-0/+1
In older versions of git, we used rfc822 header folding to indicate that the original subject line had multiple lines in it. But since a1f6baa (format-patch: wrap long header lines, 2011-02-23), we now use header folding whenever there is a long line. This means that "git am" cannot trust header folding as a sign from format-patch that newlines should be preserved. Instead, format-patch needs to signal more explicitly that the newlines are significant. This patch does so by rfc2047-encoding the newlines in the subject line. No changes are needed on the "git am" end; it already decodes the newlines properly. Signed-off-by: Jeff King <peff@peff.net> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2011-05-26clean up calling conventions for pretty.c functionsLibravatar Jeff King4-13/+17
We have a pretty_print_context representing the parameters for a pretty-print session, but we did not use it uniformly. As a result, functions kept growing more and more arguments. Let's clean this up in a few ways: 1. All pretty-print pp_* functions now take a context. This lets us reduce the number of arguments to these functions, since we were just passing around the context values separately. 2. The context argument now has a cmit_fmt field, which was passed around separately. That's one less argument per function. 3. The context argument always comes first, which makes calling a little more uniform. This drops lines from some callers, and adds lines in a few places (because we need an extra line to set the context's fmt field). Overall, we don't save many lines, but the lines that are there are a lot simpler and more readable. Signed-off-by: Jeff King <peff@peff.net> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2011-05-26pretty: add pp_commit_easy function for simple callersLibravatar Jeff King5-12/+5
Many callers don't actually care about the pretty print context at all; let's just give them a simple way of pretty-printing a commit without having to create a context struct. Signed-off-by: Jeff King <peff@peff.net> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2011-05-26mailinfo: always clean up rfc822 header foldingLibravatar Jeff King1-1/+1
Without the "-k" option, mailinfo will convert a folded subject header like: Subject: this is a subject that doesn't fit on one line into a single line. With "-k", however, we assumed that these newlines were significant and represented something that the sending side would want us to preserve. For messages created by format-patch, this assumption was broken by a1f6baa (format-patch: wrap long header lines, 2011-02-23). For messages sent by arbitrary MUAs, this was probably never a good assumption to make, as they may have been folding subjects in accordance with rfc822's line length recommendations all along. This patch now joins folded lines with a single whitespace character. This treats header folding purely as a syntactic feature of the transport mechanism, not as something that format-patch is trying to tell us about the original subject. Signed-off-by: Jeff King <peff@peff.net> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2011-05-26remote: allow "-t" with fetch mirrorsLibravatar Jeff King1-2/+2
Commit 13fc2c1 (remote: disallow some nonsensical option combinations, 2011-03-30) made it impossible to use "remote add -t foo --mirror". The argument was that specifying specific branches is useless because: 1. Push mirrors do not want a refspec at all. 2. The point of fetch mirroring is to use a broad refspec like "refs/*", but using "-t" overrides that. Point (1) is valid; "-t" with push mirrors is useless. But point (2) ignored another side effect of using --mirror: it fetches the refs directly into the refs/ namespace as they are found upstream, instead of placing them in a separate-remote layout. So 13fc2c1 was overly constrictive, and disallowed reasonable specific-branch mirroring, like: git remote add -t heads/foo -t heads/bar --mirror=fetch which makes the local "foo" and "bar" branches direct mirrors of the remote, but does not fetch anything else. This patch restores the original behavior, but only for fetch mirrors. Signed-off-by: Jeff King <peff@peff.net> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2011-05-26Merge branch 'jk/fetch-mark-complete-optimization'Libravatar Junio C Hamano1-2/+4
* jk/fetch-mark-complete-optimization: fetch: avoid repeated commits in mark_complete
2011-05-26Merge branch 'jk/cherry-pick-root-with-resolve' into maintLibravatar Junio C Hamano2-5/+11
* jk/cherry-pick-root-with-resolve: t3503: test cherry picking and reverting root commits revert: allow reverting a root commit cherry-pick: handle root commits with external strategies
2011-05-26Merge branch 'jk/git-connection-deadlock-fix' into maintLibravatar Junio C Hamano1-0/+2
* jk/git-connection-deadlock-fix: test core.gitproxy configuration send-pack: avoid deadlock on git:// push with failed pack-objects connect: let callers know if connection is a socket connect: treat generic proxy processes like ssh processes Conflicts: connect.c
2011-05-26Merge branch 'js/maint-send-pack-stateless-rpc-deadlock-fix' into maintLibravatar Junio C Hamano1-2/+7
* js/maint-send-pack-stateless-rpc-deadlock-fix: sideband_demux(): fix decl-after-stmt send-pack: unbreak push over stateless rpc send-pack: avoid deadlock when pack-object dies early
2011-05-25Merge branch 'jc/bigfile'Libravatar Junio C Hamano2-2/+6
* jc/bigfile: Bigfile: teach "git add" to send a large file straight to a pack index_fd(): split into two helper functions index_fd(): turn write_object and format_check arguments into one flag
2011-05-25Merge branch 'js/log-abbrev-commit-config'Libravatar Junio C Hamano1-9/+18
* js/log-abbrev-commit-config: Add log.abbrevCommit config variable "git log -h": typofix misspelled 'suppress'
2011-05-25Merge branch 'maint'Libravatar Junio C Hamano2-2/+2
* maint: init/clone: remove short option -L and document --separate-git-dir
2011-05-25Teach read-tree the -n|--dry-run optionLibravatar Jens Lehmann1-1/+2
The option can be used to check if read-tree with the same set of other options like "-m" and "-u" would succeed without actually changing either the index or the working tree. The relevant tests in the t10?? range were extended to do a read-tree -n before the real read-tree to make sure neither the index nor any local files were changed with -n and the same exit code as without -n is returned. The helper functions added for that purpose reside in the new t/lib-read-tree.sh file. The only exception is #13 in t1004 ("unlinking an un-unlink-able symlink"). As this is an issue of wrong directory permissions it is not detected with -n. Signed-off-by: Jens Lehmann <Jens.Lehmann@web.de> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2011-05-25init/clone: remove short option -L and document --separate-git-dirLibravatar Nguyen Thai Ngoc Duy2-2/+2
Signed-off-by: Nguyễn Thái Ngọc Duy <pclouds@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2011-05-23Merge branch 'ms/ls-remote-exit-with-status'Libravatar Junio C Hamano1-2/+9
* ms/ls-remote-exit-with-status: ls-remote: the --exit-code option reports "no matching refs"
2011-05-23Merge branch 'mg/config-symbolic-constants'Libravatar Junio C Hamano1-1/+6
* mg/config-symbolic-constants: config: Give error message when not changing a multivar config: define and document exit codes
2011-05-23Merge branch 'jc/magic-pathspec'Libravatar Junio C Hamano1-7/+1
* jc/magic-pathspec: setup.c: Fix some "symbol not declared" sparse warnings t3703: Skip tests using directory name ":" on Windows revision.c: leave a note for "a lone :" enhancement t3703, t4208: add test cases for magic pathspec rev/path disambiguation: further restrict "misspelled index entry" diag fix overslow :/no-such-string-ever-existed diagnostics fix overstrict :<path> diagnosis grep: use get_pathspec() correctly pathspec: drop "lone : means no pathspec" from get_pathspec() Revert "magic pathspec: add ":(icase)path" to match case insensitively" magic pathspec: add ":(icase)path" to match case insensitively magic pathspec: futureproof shorthand form magic pathspec: add tentative ":/path/from/top/level" pathspec support
2011-05-23Merge branch 'jk/blame-line-porcelain'Libravatar Junio C Hamano1-10/+23
* jk/blame-line-porcelain: blame: add --line-porcelain output format blame: refactor porcelain output add tests for various blame formats
2011-05-19Merge branch 'jc/replacing'Libravatar Junio C Hamano1-2/+2
* jc/replacing: read_sha1_file(): allow selective bypassing of replacement mechanism inline lookup_replace_object() calls read_sha1_file(): get rid of read_sha1_file_repl() madness t6050: make sure we test not just commit replacement Declare lookup_replace_object() in cache.h, not in commit.h Conflicts: environment.c
2011-05-19Merge branch 'ms/tagname-does-not-begin-with-dash'Libravatar Junio C Hamano1-8/+18
* ms/tagname-does-not-begin-with-dash: tag: disallow '-' as tag name
2011-05-19Merge branch 'jk/git-connection-deadlock-fix'Libravatar Junio C Hamano1-0/+2
* jk/git-connection-deadlock-fix: test core.gitproxy configuration send-pack: avoid deadlock on git:// push with failed pack-objects connect: let callers know if connection is a socket connect: treat generic proxy processes like ssh processes Conflicts: connect.c
2011-05-19Merge branch 'js/maint-send-pack-stateless-rpc-deadlock-fix'Libravatar Junio C Hamano1-2/+2
* js/maint-send-pack-stateless-rpc-deadlock-fix: sideband_demux(): fix decl-after-stmt
2011-05-19Merge branch 'jk/cherry-pick-root-with-resolve'Libravatar Junio C Hamano2-5/+11
* jk/cherry-pick-root-with-resolve: t3503: test cherry picking and reverting root commits revert: allow reverting a root commit cherry-pick: handle root commits with external strategies
2011-05-19receive-pack: eliminate duplicate .have refsLibravatar Jeff King1-3/+13
When receiving a push, we advertise ref tips from any alternate repositories, in case that helps the client send a smaller pack. Since these refs don't actually exist in the destination repository, we don't transmit the real ref names, but instead use the pseudo-ref ".have". If your alternate has a large number of duplicate refs (for example, because it is aggregating objects from many related repositories, some of which will have the same tags and branch tips), then we will send each ".have $sha1" line multiple times. This is a pointless waste of bandwidth, as we are simply repeating the same fact to the client over and over. This patch eliminates duplicate .have refs early on. It does so efficiently by sorting the complete list and skipping duplicates. This has the side effect of re-ordering the .have lines by ascending sha1; this isn't a problem, though, as the original order was meaningless. There is a similar .have system in fetch-pack, but it does not suffer from the same problem. For each alternate ref we consider in fetch-pack, we actually open the object and mark it with the SEEN flag, so duplicates are automatically culled. Signed-off-by: Jeff King <peff@peff.net> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2011-05-19refactor refs_from_alternate_cb to allow passing extra dataLibravatar Jeff King2-2/+2
The foreach_alt_odb function triggers a callback for each alternate object db we have, with room for a single void pointer as data. Currently, we always call refs_from_alternate_cb as the callback function, and then pass another callback (to receive each ref individually) as the void pointer. This has two problems: 1. C technically forbids stuffing a function pointer into a "void *". In practice, this probably doesn't matter on any architectures git runs on, but it never hurts to follow the letter of the law. 2. There is no room for an extra data pointer. Indeed, the alternate_ref_fn that refs_from_alternate_cb calls takes a void* for data, but we always pass it NULL. Instead, let's properly stuff our function pointer into a data struct, which also leaves room for an extra caller-supplied data pointer. And to keep things simple for existing callers, let's make a for_each_alternate_ref function that takes care of creating the extra struct. Signed-off-by: Jeff King <peff@peff.net> Signed-off-by: Junio C Hamano <gitster@pobox.com>