return NULL;
}
+static int similarity_index(struct diff_filepair *p)
+{
+ return p->score * 100 / MAX_SCORE;
+}
+
+static void fill_metainfo(struct strbuf *msg,
+ const char *name,
+ const char *other,
+ struct diff_filespec *one,
+ struct diff_filespec *two,
+ struct diff_options *o,
+ struct diff_filepair *p)
+{
+ strbuf_init(msg, PATH_MAX * 2 + 300);
+ switch (p->status) {
+ case DIFF_STATUS_COPIED:
+ strbuf_addf(msg, "similarity index %d%%", similarity_index(p));
+ strbuf_addstr(msg, "\ncopy from ");
+ quote_c_style(name, msg, NULL, 0);
+ strbuf_addstr(msg, "\ncopy to ");
+ quote_c_style(other, msg, NULL, 0);
+ strbuf_addch(msg, '\n');
+ break;
+ case DIFF_STATUS_RENAMED:
+ strbuf_addf(msg, "similarity index %d%%", similarity_index(p));
+ strbuf_addstr(msg, "\nrename from ");
+ quote_c_style(name, msg, NULL, 0);
+ strbuf_addstr(msg, "\nrename to ");
+ quote_c_style(other, msg, NULL, 0);
+ strbuf_addch(msg, '\n');
+ break;
+ case DIFF_STATUS_MODIFIED:
+ if (p->score) {
+ strbuf_addf(msg, "dissimilarity index %d%%\n",
+ similarity_index(p));
+ break;
+ }
+ /* fallthru */
+ default:
+ /* nothing */
+ ;
+ }
+ if (one && two && hashcmp(one->sha1, two->sha1)) {
+ int abbrev = DIFF_OPT_TST(o, FULL_INDEX) ? 40 : DEFAULT_ABBREV;
+
+ if (DIFF_OPT_TST(o, BINARY)) {
+ mmfile_t mf;
+ if ((!fill_mmfile(&mf, one) && diff_filespec_is_binary(one)) ||
+ (!fill_mmfile(&mf, two) && diff_filespec_is_binary(two)))
+ abbrev = 40;
+ }
+ strbuf_addf(msg, "index %.*s..%.*s",
+ abbrev, sha1_to_hex(one->sha1),
+ abbrev, sha1_to_hex(two->sha1));
+ if (one->mode == two->mode)
+ strbuf_addf(msg, " %06o", one->mode);
+ strbuf_addch(msg, '\n');
+ }
+ if (msg->len)
+ strbuf_setlen(msg, msg->len - 1);
+}
+
static void run_diff_cmd(const char *pgm,
const char *name,
const char *other,
const char *attr_path,
struct diff_filespec *one,
struct diff_filespec *two,
- const char *xfrm_msg,
+ struct strbuf *msg,
struct diff_options *o,
- int complete_rewrite)
+ struct diff_filepair *p)
{
+ const char *xfrm_msg = NULL;
+ int complete_rewrite = (p->status == DIFF_STATUS_MODIFIED) && p->score;
+
+ if (msg) {
+ fill_metainfo(msg, name, other, one, two, o, p);
+ xfrm_msg = msg->len ? msg->buf : NULL;
+ }
+
if (!DIFF_OPT_TST(o, ALLOW_EXTERNAL))
pgm = NULL;
else {
hashclr(one->sha1);
}
-static int similarity_index(struct diff_filepair *p)
-{
- return p->score * 100 / MAX_SCORE;
-}
-
static void strip_prefix(int prefix_length, const char **namep, const char **otherp)
{
/* Strip the prefix but do not molest /dev/null and absolute paths */
{
const char *pgm = external_diff();
struct strbuf msg;
- char *xfrm_msg;
struct diff_filespec *one = p->one;
struct diff_filespec *two = p->two;
const char *name;
const char *other;
const char *attr_path;
- int complete_rewrite = 0;
name = p->one->path;
other = (strcmp(name, p->two->path) ? p->two->path : NULL);
if (DIFF_PAIR_UNMERGED(p)) {
run_diff_cmd(pgm, name, NULL, attr_path,
- NULL, NULL, NULL, o, 0);
+ NULL, NULL, NULL, o, p);
return;
}
diff_fill_sha1_info(one);
diff_fill_sha1_info(two);
- strbuf_init(&msg, PATH_MAX * 2 + 300);
- switch (p->status) {
- case DIFF_STATUS_COPIED:
- strbuf_addf(&msg, "similarity index %d%%", similarity_index(p));
- strbuf_addstr(&msg, "\ncopy from ");
- quote_c_style(name, &msg, NULL, 0);
- strbuf_addstr(&msg, "\ncopy to ");
- quote_c_style(other, &msg, NULL, 0);
- strbuf_addch(&msg, '\n');
- break;
- case DIFF_STATUS_RENAMED:
- strbuf_addf(&msg, "similarity index %d%%", similarity_index(p));
- strbuf_addstr(&msg, "\nrename from ");
- quote_c_style(name, &msg, NULL, 0);
- strbuf_addstr(&msg, "\nrename to ");
- quote_c_style(other, &msg, NULL, 0);
- strbuf_addch(&msg, '\n');
- break;
- case DIFF_STATUS_MODIFIED:
- if (p->score) {
- strbuf_addf(&msg, "dissimilarity index %d%%\n",
- similarity_index(p));
- complete_rewrite = 1;
- break;
- }
- /* fallthru */
- default:
- /* nothing */
- ;
- }
-
- if (hashcmp(one->sha1, two->sha1)) {
- int abbrev = DIFF_OPT_TST(o, FULL_INDEX) ? 40 : DEFAULT_ABBREV;
-
- if (DIFF_OPT_TST(o, BINARY)) {
- mmfile_t mf;
- if ((!fill_mmfile(&mf, one) && diff_filespec_is_binary(one)) ||
- (!fill_mmfile(&mf, two) && diff_filespec_is_binary(two)))
- abbrev = 40;
- }
- strbuf_addf(&msg, "index %.*s..%.*s",
- abbrev, sha1_to_hex(one->sha1),
- abbrev, sha1_to_hex(two->sha1));
- if (one->mode == two->mode)
- strbuf_addf(&msg, " %06o", one->mode);
- strbuf_addch(&msg, '\n');
- }
-
- if (msg.len)
- strbuf_setlen(&msg, msg.len - 1);
- xfrm_msg = msg.len ? msg.buf : NULL;
-
if (!pgm &&
DIFF_FILE_VALID(one) && DIFF_FILE_VALID(two) &&
(S_IFMT & one->mode) != (S_IFMT & two->mode)) {
- /* a filepair that changes between file and symlink
+ /*
+ * a filepair that changes between file and symlink
* needs to be split into deletion and creation.
*/
struct diff_filespec *null = alloc_filespec(two->path);
run_diff_cmd(NULL, name, other, attr_path,
- one, null, xfrm_msg, o, 0);
+ one, null, &msg, o, p);
free(null);
+ strbuf_release(&msg);
+
null = alloc_filespec(one->path);
run_diff_cmd(NULL, name, other, attr_path,
- null, two, xfrm_msg, o, 0);
+ null, two, &msg, o, p);
free(null);
}
else
run_diff_cmd(pgm, name, other, attr_path,
- one, two, xfrm_msg, o, complete_rewrite);
+ one, two, &msg, o, p);
strbuf_release(&msg);
}
echo Nothing new to pack.
fi
fi
-for name in $names ; do
- fullbases="$fullbases pack-$name"
- chmod a-w "$PACKTMP-$name.pack"
- chmod a-w "$PACKTMP-$name.idx"
- mkdir -p "$PACKDIR" || exit
+# Ok we have prepared all new packfiles.
+mkdir -p "$PACKDIR" || exit
+
+# First see if there are packs of the same name and if so
+# if we can move them out of the way (this can happen if we
+# repacked immediately after packing fully.
+rollback=
+failed=
+for name in $names
+do
for sfx in pack idx
do
- if test -f "$PACKDIR/pack-$name.$sfx"
- then
- mv -f "$PACKDIR/pack-$name.$sfx" \
- "$PACKDIR/old-pack-$name.$sfx"
- fi
- done &&
+ file=pack-$name.$sfx
+ test -f "$PACKDIR/$file" || continue
+ rm -f "$PACKDIR/old-$file" &&
+ mv "$PACKDIR/$file" "$PACKDIR/old-$file" || {
+ failed=t
+ break
+ }
+ rollback="$rollback $file"
+ done
+ test -z "$failed" || break
+done
+
+# If renaming failed for any of them, roll the ones we have
+# already renamed back to their original names.
+if test -n "$failed"
+then
+ rollback_failure=
+ for file in $rollback
+ do
+ mv "$PACKDIR/old-$file" "$PACKDIR/$file" ||
+ rollback_failure="$rollback_failure $file"
+ done
+ if test -n "$rollback_failure"
+ then
+ echo >&2 "WARNING: Some packs in use have been renamed by"
+ echo >&2 "WARNING: prefixing old- to their name, in order to"
+ echo >&2 "WARNING: replace them with the new version of the"
+ echo >&2 "WARNING: file. But the operation failed, and"
+ echo >&2 "WARNING: attempt to rename them back to their"
+ echo >&2 "WARNING: original names also failed."
+ echo >&2 "WARNING: Please rename them in $PACKDIR manually:"
+ for file in $rollback_failure
+ do
+ echo >&2 "WARNING: old-$file -> $file"
+ done
+ fi
+ exit 1
+fi
+
+# Now the ones with the same name are out of the way...
+fullbases=
+for name in $names
+do
+ fullbases="$fullbases pack-$name"
+ chmod a-w "$PACKTMP-$name.pack"
+ chmod a-w "$PACKTMP-$name.idx"
mv -f "$PACKTMP-$name.pack" "$PACKDIR/pack-$name.pack" &&
- mv -f "$PACKTMP-$name.idx" "$PACKDIR/pack-$name.idx" &&
- test -f "$PACKDIR/pack-$name.pack" &&
- test -f "$PACKDIR/pack-$name.idx" || {
- echo >&2 "Couldn't replace the existing pack with updated one."
- echo >&2 "The original set of packs have been saved as"
- echo >&2 "old-pack-$name.{pack,idx} in $PACKDIR."
- exit 1
- }
- rm -f "$PACKDIR/old-pack-$name.pack" "$PACKDIR/old-pack-$name.idx"
+ mv -f "$PACKTMP-$name.idx" "$PACKDIR/pack-$name.idx" ||
+ exit
+done
+
+# Remove the "old-" files
+for name in $names
+do
+ rm -f "$PACKDIR/old-pack-$name.idx"
+ rm -f "$PACKDIR/old-pack-$name.pack"
done
+# End of pack replacement.
+
if test "$remove_redundant" = t
then
# We know $existing are all redundant.