[PATCH 7/8] setup_tree_pathspec(): interpret '^' as negative pathspec
From: Nguyễn Thái Ngọc Duy <hidden>
Date: 2016-06-15 22:49:31
Subsystem:
the rest · Maintainer:
Linus Torvalds
This patch does preparation work for tree exclusion in tree_entry_interesting(). '^' has similar meaning to '!' in gitexcludes. '!' is not used because bash does not like arguments with a leading '!'. Eventually, "git diff -- foo ^foo/bar" should show differences in foo, except foo/bar. If "git diff -- ^foo" is given, then it implies everything except foo, which could surprise users that "bar" in "git diff -- bar ^foo" has no effect at all. NOTE: pathspec in diff machinery is also used by ce_path_match() and read_index_preload(), which currently do not understand '^' at all. Signed-off-by: Nguyễn Thái Ngọc Duy <redacted> --- tree-walk.c | 28 ++++++++++++++++++++++++++++ tree-walk.h | 3 +++ 2 files changed, 31 insertions(+), 0 deletions(-)
diff --git a/tree-walk.c b/tree-walk.c
index e7041d7..a2f4a00 100644
--- a/tree-walk.c
+++ b/tree-walk.c@@ -479,7 +479,35 @@ int setup_tree_pathspec(const char **paths, struct tree_pathspec_list *ps) for (i=0; i < ps->nr; i++) { struct tree_pathspec *exc = ps->info+i; exc->path = ps->paths[i]; + if (*exc->path == '^') { + exc->path++; + exc->to_exclude = 1; + } exc->pathlen = strlen(exc->path); + if (exc->to_exclude) { + int j, found = 0; + + for (j = i-1; j >= 0; j--) { + int len = strlen(ps->info[j].path); + if (len < exc->pathlen && + !strncmp(ps->info[j].path, exc->path, len) && + exc->path[len] == '/') { + ps->info[j].has_sub_pathspec = 1; + found = 1; + } + } + + /* + * If a negative pathspec has nothing to + * negate from, include everything so it can + * negate from that. This way is not + * perfect. You may be surprised to find out + * "^Documentation t" does not take "t" into + * account at all + */ + if (!found) + ps->include_by_default = 1; + } } return 0; }
diff --git a/tree-walk.h b/tree-walk.h
index bb55656..6be1e6c 100644
--- a/tree-walk.h
+++ b/tree-walk.h@@ -16,9 +16,12 @@ struct tree_desc { struct tree_pathspec_list { const char **paths; int nr; + int include_by_default:1; struct tree_pathspec { const char *path; int pathlen; + int to_exclude:1; + int has_sub_pathspec:1; } *info; };
--
1.7.1.rc1.70.g13aff