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![Elijah Newren](/assets/img/avatar_default.png)
On Mac's HFS where git sets core.precomposeUnicode to true automatically by git init/clone, when a user creates a simple unicode refname (in NFC format) such as españa: $ git branch españa different commands would display the branch name differently. For example, git branch, git log --decorate, and git fast-export all used 65 73 70 61 c3 b1 61 (or "espa\xc3\xb1a") (NFC form) while show-ref would use 65 73 70 61 6e cc 83 61 (or "espan\xcc\x83a") (NFD form). A stress test for git filter-repo was tripped up by this inconsistency, though digging in I found that the problems could compound; for example, if the user ran $ git pack-refs --all and then tried to check out the branch, they would be met with: $ git checkout españa error: pathspec 'españa' did not match any file(s) known to git $ git checkout españa -- fatal: invalid reference: españa $ git branch españa * master Note that the user could run the `git branch` command first and copy and paste the `españa` portion of the output and still see the same two errors. Also, if the user added --no-prune to the pack-refs command, then they would see three branches: master, españa, and españa (those last two are NFC vs. NFD forms, even if they render the same). Further, if the user had the `españa` branch checked out before running `git pack-refs --all`, the user would be greeted with (note that I'm trimming trailing output with an ellipsis): $ git rev-parse HEAD fatal: ambiguous argument 'HEAD': unknown revision or path... $ git status On branch españa No commits yet... Or worse, if the user didn't check this stuff first, running `git commit` will create a new commit with all changes of all of history being squashed into it. In addition to pack-refs, one could also get into this state with upload-pack or anything that calls either pack-refs or upload-pack (e.g. gc or clone). Add code in a few places (pack-refs, show-ref, upload-pack) to check and honor the setting of core.precomposeUnicode to avoid these bugs. Signed-off-by: Elijah Newren <newren@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
25 lines
724 B
C
25 lines
724 B
C
#include "builtin.h"
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#include "config.h"
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#include "parse-options.h"
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#include "refs.h"
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#include "repository.h"
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static char const * const pack_refs_usage[] = {
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N_("git pack-refs [<options>]"),
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NULL
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};
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int cmd_pack_refs(int argc, const char **argv, const char *prefix)
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{
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unsigned int flags = PACK_REFS_PRUNE;
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struct option opts[] = {
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OPT_BIT(0, "all", &flags, N_("pack everything"), PACK_REFS_ALL),
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OPT_BIT(0, "prune", &flags, N_("prune loose refs (default)"), PACK_REFS_PRUNE),
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OPT_END(),
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};
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git_config(git_default_config, NULL);
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if (parse_options(argc, argv, prefix, opts, pack_refs_usage, 0))
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usage_with_options(pack_refs_usage, opts);
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return refs_pack_refs(get_main_ref_store(the_repository), flags);
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}
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