@@ -131,9 +131,11 @@ diff.renames::
Whether and how Git detects renames. If set to "false",
rename detection is disabled. If set to "true", basic rename
detection is enabled. If set to "copies" or "copy", Git will
- detect copies, as well. Defaults to true. Note that this
- affects only 'git diff' Porcelain like linkgit:git-diff[1] and
- linkgit:git-log[1], and not lower level commands such as
+ detect copies, as well. If set to "copies-harder", Git will spend extra
+ cycles to find more copies even in unmodified paths, see
+ '--find-copies-harder' in linkgit:git-diff[1]. Defaults to true.
+ Note that this affects only 'git diff' Porcelain like linkgit:git-diff[1]
+ and linkgit:git-log[1], and not lower level commands such as
linkgit:git-diff-files[1].
diff.suppressBlankEmpty::
@@ -33,7 +33,9 @@ status.renames::
Whether and how Git detects renames in linkgit:git-status[1] and
linkgit:git-commit[1] . If set to "false", rename detection is
disabled. If set to "true", basic rename detection is enabled.
- If set to "copies" or "copy", Git will detect copies, as well.
+ If set to "copies" or "copy", Git will detect copies, as well. If set
+ to "copies-harder", Git will spend extra cycles to find more copies even
+ in unmodified paths, see '--find-copies-harder' in linkgit:git-diff[1].
Defaults to the value of diff.renames.
status.showStash::
@@ -204,6 +204,8 @@ int git_config_rename(const char *var, const char *value)
{
if (!value)
return DIFF_DETECT_RENAME;
+ if (!strcasecmp(value, "copies-harder"))
+ return DIFF_DETECT_COPY_HARDER;
if (!strcasecmp(value, "copies") || !strcasecmp(value, "copy"))
return DIFF_DETECT_COPY;
return git_config_bool(var,value) ? DIFF_DETECT_RENAME : 0;
@@ -4848,8 +4850,12 @@ void diff_setup_done(struct diff_options *options)
else
options->flags.diff_from_contents = 0;
- if (options->flags.find_copies_harder)
+ /* Just fold this in as it makes the patch-to-git smaller */
+ if (options->flags.find_copies_harder ||
+ options->detect_rename == DIFF_DETECT_COPY_HARDER) {
+ options->flags.find_copies_harder = 1;
options->detect_rename = DIFF_DETECT_COPY;
+ }
if (!options->flags.relative_name)
options->prefix = NULL;
@@ -5280,7 +5286,8 @@ static int diff_opt_find_copies(const struct option *opt,
if (*arg != 0)
return error(_("invalid argument to %s"), opt->long_name);
- if (options->detect_rename == DIFF_DETECT_COPY)
+ if (options->detect_rename == DIFF_DETECT_COPY ||
+ options->detect_rename == DIFF_DETECT_COPY_HARDER)
options->flags.find_copies_harder = 1;
else
options->detect_rename = DIFF_DETECT_COPY;
@@ -555,6 +555,7 @@ int git_config_rename(const char *var, const char *value);
#define DIFF_DETECT_RENAME 1
#define DIFF_DETECT_COPY 2
+#define DIFF_DETECT_COPY_HARDER 3
#define DIFF_PICKAXE_ALL 1
#define DIFF_PICKAXE_REGEX 2
@@ -299,7 +299,8 @@ static int find_identical_files(struct hashmap *srcs,
}
/* Give higher scores to sources that haven't been used already */
score = !source->rename_used;
- if (source->rename_used && options->detect_rename != DIFF_DETECT_COPY)
+ if (source->rename_used && options->detect_rename != DIFF_DETECT_COPY &&
+ options->detect_rename != DIFF_DETECT_COPY_HARDER)
continue;
score += basename_same(source, target);
if (score > best_score) {
@@ -1405,7 +1406,8 @@ void diffcore_rename_extended(struct diff_options *options,
trace2_region_enter("diff", "setup", options->repo);
info.setup = 0;
assert(!dir_rename_count || strmap_empty(dir_rename_count));
- want_copies = (detect_rename == DIFF_DETECT_COPY);
+ want_copies = (detect_rename == DIFF_DETECT_COPY ||
+ detect_rename == DIFF_DETECT_COPY_HARDER);
if (dirs_removed && (break_idx || want_copies))
BUG("dirs_removed incompatible with break/copy detection");
if (break_idx && relevant_sources)
@@ -4788,7 +4788,7 @@ static void merge_start(struct merge_options *opt, struct merge_result *result)
* sanity check them anyway.
*/
assert(opt->detect_renames >= -1 &&
- opt->detect_renames <= DIFF_DETECT_COPY);
+ opt->detect_renames <= DIFF_DETECT_COPY_HARDER);
assert(opt->verbosity >= 0 && opt->verbosity <= 5);
assert(opt->buffer_output <= 2);
assert(opt->obuf.len == 0);
@@ -3704,7 +3704,7 @@ static int merge_start(struct merge_options *opt, struct tree *head)
assert(opt->branch1 && opt->branch2);
assert(opt->detect_renames >= -1 &&
- opt->detect_renames <= DIFF_DETECT_COPY);
+ opt->detect_renames <= DIFF_DETECT_COPY_HARDER);
assert(opt->detect_directory_renames >= MERGE_DIRECTORY_RENAMES_NONE &&
opt->detect_directory_renames <= MERGE_DIRECTORY_RENAMES_TRUE);
assert(opt->rename_limit >= -1);
This patch adds a config value for 'diff.renames' called 'copies-harder' which make it so '-C -C' is in effect always passed for 'git log -p', 'git diff', etc. This allows specifying that 'git log -p', 'git diff', etc should always act as if '-C --find-copies-harder' was passed. It has proven this especially useful for certain types of repository (like Gentoo's ebuild repositories) because files are often copies of a previous version: Suppose a directory 'sys-devel/gcc' contains recipes for building GCC, with one file for each supported upstream branch: gcc-13.x.build.recipe gcc-12.x.build.recipe gcc-11.x.build.recipe gcc-10.x.build.recipe gcc-13.x.build.recipe was started as a copy of gcc-12.x.build.recipe (which was started as a copy of gcc-11.x.build.recipe, etc.). Previous versions are kept around to support parallel installation of multiple versions. Being able to easily observe the diff relative to other recipes within the directory has been a quality of life improvement for such repo layouts. Signed-off-by: Sam James <sam@gentoo.org> --- Documentation/config/diff.txt | 8 +++++--- Documentation/config/status.txt | 4 +++- diff.c | 11 +++++++++-- diff.h | 1 + diffcore-rename.c | 6 ++++-- merge-ort.c | 2 +- merge-recursive.c | 2 +- 7 files changed, 24 insertions(+), 10 deletions(-)