From 8894d5358095a08c2f700a87ce9fdefb0b6eb61b Mon Sep 17 00:00:00 2001 From: Clemens Buchacher Date: Sat, 30 Jul 2011 19:13:47 +0200 Subject: [PATCH] commit: allow partial commits with relative paths In order to do partial commits, git-commit overlays a tree on the cache and checks pathspecs against the result. Currently, the overlaying is done using "prefix" which prevents relative pathspecs with ".." and absolute pathspec from matching when they refer to files not under "prefix" and absent from the index, but still in the tree (i.e. files staged for removal). The point of providing a prefix at all is performance optimization. If we say there is no common prefix for the files of interest, then we have to read the entire tree into the index. But even if we cannot use the working directory as a prefix, we can still figure out if there is a common prefix for all given paths, and use that instead. The pathspec_prefix() routine from ls-files.c does exactly that. Any use of global variables is removed from pathspec_prefix() so that it can be called from commit.c. Reported-by: Reuben Thomas Analyzed-by: Michael J Gruber Signed-off-by: Clemens Buchacher Signed-off-by: Junio C Hamano --- builtin/commit.c | 6 ++++-- builtin/ls-files.c | 38 ++------------------------------------ cache.h | 1 + setup.c | 32 ++++++++++++++++++++++++++++++++ 4 files changed, 39 insertions(+), 38 deletions(-) diff --git a/builtin/commit.c b/builtin/commit.c index e1af9b19f..cb738574f 100644 --- a/builtin/commit.c +++ b/builtin/commit.c @@ -256,8 +256,10 @@ static int list_paths(struct string_list *list, const char *with_tree, ; m = xcalloc(1, i); - if (with_tree) - overlay_tree_on_cache(with_tree, prefix); + if (with_tree) { + const char *max_prefix = pathspec_prefix(prefix, pattern); + overlay_tree_on_cache(with_tree, max_prefix); + } for (i = 0; i < active_nr; i++) { struct cache_entry *ce = active_cache[i]; diff --git a/builtin/ls-files.c b/builtin/ls-files.c index 15701233e..0e98bff0c 100644 --- a/builtin/ls-files.c +++ b/builtin/ls-files.c @@ -276,41 +276,6 @@ static void prune_cache(const char *prefix) active_nr = last; } -static const char *pathspec_prefix(const char *prefix) -{ - const char **p, *n, *prev; - unsigned long max; - - if (!pathspec) { - max_prefix_len = prefix ? strlen(prefix) : 0; - return prefix; - } - - prev = NULL; - max = PATH_MAX; - for (p = pathspec; (n = *p) != NULL; p++) { - int i, len = 0; - for (i = 0; i < max; i++) { - char c = n[i]; - if (prev && prev[i] != c) - break; - if (!c || c == '*' || c == '?') - break; - if (c == '/') - len = i+1; - } - prev = n; - if (len < max) { - max = len; - if (!max) - break; - } - } - - max_prefix_len = max; - return max ? xmemdupz(prev, max) : NULL; -} - static void strip_trailing_slash_from_submodules(void) { const char **p; @@ -576,7 +541,8 @@ int cmd_ls_files(int argc, const char **argv, const char *cmd_prefix) strip_trailing_slash_from_submodules(); /* Find common prefix for all pathspec's */ - max_prefix = pathspec_prefix(prefix); + max_prefix = pathspec_prefix(prefix, pathspec); + max_prefix_len = max_prefix ? strlen(max_prefix) : 0; /* Treat unmatching pathspec elements as errors */ if (pathspec && error_unmatch) { diff --git a/cache.h b/cache.h index e11cf6ab1..553a6ebd4 100644 --- a/cache.h +++ b/cache.h @@ -426,6 +426,7 @@ extern void set_git_work_tree(const char *tree); #define ALTERNATE_DB_ENVIRONMENT "GIT_ALTERNATE_OBJECT_DIRECTORIES" extern const char **get_pathspec(const char *prefix, const char **pathspec); +extern const char *pathspec_prefix(const char *prefix, const char **pathspec); extern void setup_work_tree(void); extern const char *setup_git_directory_gently(int *); extern const char *setup_git_directory(void); diff --git a/setup.c b/setup.c index ce87900ce..699fcf096 100644 --- a/setup.c +++ b/setup.c @@ -264,6 +264,38 @@ const char **get_pathspec(const char *prefix, const char **pathspec) return pathspec; } +const char *pathspec_prefix(const char *prefix, const char **pathspec) +{ + const char **p, *n, *prev; + unsigned long max; + + if (!pathspec) + return prefix ? xmemdupz(prefix, strlen(prefix)) : NULL; + + prev = NULL; + max = PATH_MAX; + for (p = pathspec; (n = *p) != NULL; p++) { + int i, len = 0; + for (i = 0; i < max; i++) { + char c = n[i]; + if (prev && prev[i] != c) + break; + if (!c || c == '*' || c == '?') + break; + if (c == '/') + len = i+1; + } + prev = n; + if (len < max) { + max = len; + if (!max) + break; + } + } + + return max ? xmemdupz(prev, max) : NULL; +} + /* * Test if it looks like we're at a git directory. * We want to see: -- 2.26.2