A common workflow in large projects is to chdir into a subdirectory of
interest and only do work there:
cd src
vi foo.c
make test
git add -u
git commit
The upcoming change to 'git add -u' behavior would not affect such a
workflow: when the only changes present are in the current directory,
'git add -u' will add all changes, and whether that happens via an
implicit "." or implicit ":/" parameter is an unimportant
implementation detail.
The warning about use of 'git add -u' with no pathspec is annoying
because it seemingly serves no purpose in this case. So suppress the
warning unless there are changes outside the cwd that are not being
added.
A previous version of this patch ran two I/O-intensive diff-files
passes: one to find changes outside the cwd, and another to find
changes to add to the index within the cwd. This version runs one
full-tree diff and decides for each change whether to add it or warn
and suppress it in update_callback. As a result, even on very large
repositories "git add -u" will not be significantly slower than the
future default behavior ("git add -u :/"), and the slowdown relative
to "git add -u ." should be a useful clue to users of such
repositories to get into the habit of explicitly passing '.'.
Signed-off-by: Jonathan Nieder <jrnieder@xxxxxxxxx>
Acked-by: Jeff King <peff@xxxxxxxx>
Improved-by: Junio C Hamano <gitster@xxxxxxxxx>
---
This is the interesting one.
Changes since v1:
* run only one diff-files pass, as explained in the log message
* use strncmp_icase, not match_pathspec, to check if paths are
under cwd
* expand log message with performance implications
* summarized Peff's review with an Ack. I hope that's ok.
Thanks for your help getting this into good shape.
builtin/add.c | 43 +++++++++++++++++++++++++++++++++++++++----
1 file changed, 39 insertions(+), 4 deletions(-)
diff --git a/builtin/add.c b/builtin/add.c
index a424e69..4d8d441 100644
--- a/builtin/add.c
+++ b/builtin/add.c
@@ -26,6 +26,8 @@ static int take_worktree_changes;
struct update_callback_data {
int flags;
int add_errors;
+ const char *implicit_dot;
+ size_t implicit_dot_len;
};
static const char *option_with_implicit_dot;
@@ -94,10 +96,27 @@ static void update_callback(struct diff_queue_struct *q,
{
int i;
struct update_callback_data *data = cbdata;
+ const char *implicit_dot = data->implicit_dot;
+ size_t implicit_dot_len = data->implicit_dot_len;
for (i = 0; i < q->nr; i++) {
struct diff_filepair *p = q->queue[i];
const char *path = p->one->path;
+
+ /*
+ * Check if "git add -A" or "git add -u" was run from a
+ * subdirectory with a modified file outside that directory,
+ * and warn if so.
+ *
+ * "git add -u" will behave like "git add -u :/" instead of
+ * "git add -u ." in the future. This warning prepares for
+ * that change.
+ */
+ if (implicit_dot &&
+ strncmp_icase(path, implicit_dot, implicit_dot_len)) {
+ warn_pathless_add();
+ continue;
+ }
switch (fix_unmerged_status(p, data)) {
default:
die(_("unexpected diff status %c"), p->status);
@@ -121,17 +140,30 @@ static void update_callback(struct diff_queue_struct *q,
}
}
+#define ADD_CACHE_IMPLICIT_DOT 32
int add_files_to_cache(const char *prefix, const char **pathspec, int flags)
{
struct update_callback_data data;
struct rev_info rev;
+
+ memset(&data, 0, sizeof(data));
+ data.flags = flags & ~ADD_CACHE_IMPLICIT_DOT;
+ if ((flags & ADD_CACHE_IMPLICIT_DOT) && prefix) {
+ /*
+ * Check for modified files throughout the worktree so
+ * update_callback has a chance to warn about changes
+ * outside the cwd.
+ */
+ data.implicit_dot = prefix;
+ data.implicit_dot_len = strlen(prefix);
+ pathspec = NULL;
+ }
+
init_revisions(&rev, prefix);
setup_revisions(0, NULL, &rev, NULL);
init_pathspec(&rev.prune_data, pathspec);
rev.diffopt.output_format = DIFF_FORMAT_CALLBACK;
rev.diffopt.format_callback = update_callback;
- data.flags = flags;
- data.add_errors = 0;
rev.diffopt.format_callback_data = &data;
rev.max_count = 0; /* do not compare unmerged paths with stage #2 */
run_diff_files(&rev, DIFF_RACY_IS_MODIFIED);
@@ -371,6 +403,7 @@ int cmd_add(int argc, const char **argv, const char *prefix)
int add_new_files;
int require_pathspec;
char *seen = NULL;
+ int implicit_dot = 0;
git_config(add_config, NULL);
@@ -400,10 +433,11 @@ int cmd_add(int argc, const char **argv, const char *prefix)
}
if (option_with_implicit_dot && !argc) {
static const char *here[2] = { ".", NULL };
- if (prefix)
+ if (prefix && addremove)
warn_pathless_add();
argc = 1;
argv = here;
+ implicit_dot = 1;
}
add_new_files = !take_worktree_changes && !refresh_only;
@@ -416,7 +450,8 @@ int cmd_add(int argc, const char **argv, const char *prefix)
(intent_to_add ? ADD_CACHE_INTENT : 0) |
(ignore_add_errors ? ADD_CACHE_IGNORE_ERRORS : 0) |
(!(addremove || take_worktree_changes)
- ? ADD_CACHE_IGNORE_REMOVAL : 0));
+ ? ADD_CACHE_IGNORE_REMOVAL : 0)) |
+ (implicit_dot ? ADD_CACHE_IMPLICIT_DOT : 0);
if (require_pathspec && argc == 0) {
fprintf(stderr, _("Nothing specified, nothing added.\n"));
--
1.8.2.rc3
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