range-diff:
```
1: 4ad89a3f1a ! 1: 879565c99a diff: implement config.diff.renames=copies-harder
@@ Commit message
This allows specifying that 'git log -p', 'git diff', etc should always act
as if '-C --find-copies-harder' was passed. - I've found this especially useful for certain types of repository (like
+ 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.
+ 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: diff.renames::
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
-+ detect copies, as well. If set to "copies-harder", Git will try harder
-+ to detect copies. 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
+- 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:: ## Documentation/config/status.txt ##
@@ Documentation/config/status.txt: status.renames::
@@ Documentation/config/status.txt: status.renames::
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 try harder to detect copies.
++ 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::
@@ diff.c: int git_config_rename(const char *var, const char *value)
+ if (!strcasecmp(value, "copies-harder"))
+ return DIFF_DETECT_COPY_HARDER;
if (!strcasecmp(value, "copies") || !strcasecmp(value, "copy"))
-- return DIFF_DETECT_COPY;
-+ return DIFF_DETECT_COPY;
-+
+ return DIFF_DETECT_COPY;
return git_config_bool(var,value) ? DIFF_DETECT_RENAME : 0;
- }
-
@@ diff.c: 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) {
++ 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;
+ }
@@ diff.c: static int diff_opt_find_copies(const struct option *opt,
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)
++ 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;
@@ diffcore-rename.c: 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)
++ 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) {
@@ diffcore-rename.c: void diffcore_rename_extended(struct diff_options *options,
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);
++ 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)
-: ---------- > 2: eda1e07ac2 diff: whitespace cleanup
```Sam James (2):
diff: implement config.diff.renames=copies-harder
diff: whitespace cleanup
Documentation/config/diff.txt | 8 +++++---
Documentation/config/status.txt | 4 +++-
diff.c | 14 +++++++++++---
diff.h | 1 +
diffcore-rename.c | 6 ++++--
merge-ort.c | 2 +-
merge-recursive.c | 2 +-
7 files changed, 26 insertions(+), 11 deletions(-)
Sam James