[PATCH v2 1/3] send-pack: track errors for each ref

From

Jeff King <peff@peff.net>

Date

Nov 13, 2007, 11:36 UTC

Message-ID

<20071113113623.GA15880@sigill.intra.peff.net>

In-Reply-To

<20071113102500.GA2767@sigill.intra.peff.net>

This paves the way for three improvements:
  - updating tracking refs only for non-error refs
  - incorporating remote rejection into the printed status
  - printing errors in a different order than we processed
    (e.g., consolidating non-ff errors near the end with
    a special message)

Signed-off-by: Jeff King <peff@peff.net>
---
 builtin-send-pack.c |  213 +++++++++++++++++++++++++++++----------------------
 cache.h             |   13 +++-
 2 files changed, 132 insertions(+), 94 deletions(-)

diff --git a/builtin-send-pack.c b/builtin-send-pack.c
index 418925e..c01a9c4 100644
--- a/builtin-send-pack.c
+++ b/builtin-send-pack.c
@@ -207,8 +207,9 @@ static void update_tracking_ref(struct remote *remote, struct ref *ref)
 	}
 }
 
-static const char *prettify_ref(const char *name)
+static const char *prettify_ref(const struct ref *ref)
 {
+	const char *name = ref->name;
 	return name + (
 		!prefixcmp(name, "refs/heads/") ? 11 :
 		!prefixcmp(name, "refs/tags/") ? 10 :
@@ -218,15 +219,90 @@ static const char *prettify_ref(const char *name)
 
 #define SUMMARY_WIDTH (2 * DEFAULT_ABBREV + 3)
 
+static void print_ref_status(char flag, const char *summary, struct ref *to, struct ref *from, const char *msg)
+{
+	fprintf(stderr, " %c %-*s ", flag, SUMMARY_WIDTH, summary);
+	if (from)
+		fprintf(stderr, "%s -> %s", prettify_ref(from), prettify_ref(to));
+	else
+		fputs(prettify_ref(to), stderr);
+	if (msg) {
+		fputs(" (", stderr);
+		fputs(msg, stderr);
+		fputc(')', stderr);
+	}
+	fputc('\n', stderr);
+}
+
+
+static void print_push_status(const char *dest, struct ref *refs)
+{
+	struct ref *ref;
+	int shown_dest = 0;
+
+	for (ref = refs; ref; ref = ref->next) {
+		if (!ref->status)
+			continue;
+		if (ref->status == REF_STATUS_UPTODATE && !args.verbose)
+			continue;
+
+		if (!shown_dest) {
+			fprintf(stderr, "To %s\n", dest);
+			shown_dest = 1;
+		}
+
+		switch(ref->status) {
+		case REF_STATUS_NONE:
+			print_ref_status('X', "[no match]", ref, NULL, NULL);
+			break;
+		case REF_STATUS_NODELETE:
+			print_ref_status('!', "[rejected]", ref, NULL,
+					"remote does not support deleting refs");
+			break;
+		case REF_STATUS_UPTODATE:
+			print_ref_status('=', "[up to date]", ref, ref->peer_ref, NULL);
+			break;
+		case REF_STATUS_NONFF:
+			print_ref_status('!', "[rejected]", ref, ref->peer_ref, "non-fast forward");
+			break;
+		case REF_STATUS_OK:
+			if (ref->deletion)
+				print_ref_status('-', "[deleted]", ref, NULL, NULL);
+			else if (is_null_sha1(ref->old_sha1))
+				print_ref_status('*',
+						(prefixcmp(ref->name, "refs/tags/") ?
+						  "[new branch]" : "[new tag]"),
+						ref, ref->peer_ref, NULL);
+			else {
+				char quickref[83];
+				char type = ' ';
+				const char *msg = NULL;
+				const char *old_abb;
+
+				old_abb = find_unique_abbrev(ref->old_sha1, DEFAULT_ABBREV);
+				strcpy(quickref, old_abb ? old_abb : sha1_to_hex(ref->old_sha1));
+				if (ref->nonff) {
+					strcat(quickref, "...");
+					type = '+';
+					msg = " (forced update)";
+				}
+				else
+					strcat(quickref, "..");
+				strcat(quickref, find_unique_abbrev(ref->new_sha1, DEFAULT_ABBREV));
+
+				print_ref_status(type, quickref, ref, ref->peer_ref, msg);
+			}
+		}
+	}
+}
+
 static int do_send_pack(int in, int out, struct remote *remote, const char *dest, int nr_refspec, const char **refspec)
 {
 	struct ref *ref;
 	int new_refs;
-	int ret = 0;
 	int ask_for_status_report = 0;
 	int allow_deleting_refs = 0;
 	int expect_status_report = 0;
-	int shown_dest = 0;
 	int flags = MATCH_REFS_NONE;
 
 	if (args.send_all)
@@ -262,10 +338,6 @@ static int do_send_pack(int in, int out, struct remote *remote, const char *dest
 	 */
 	new_refs = 0;
 	for (ref = remote_refs; ref; ref = ref->next) {
-		char old_hex[60], *new_hex;
-		int will_delete_ref;
-		const char *pretty_ref;
-		const char *pretty_peer = NULL; /* only used when not deleting */
 		const unsigned char *new_sha1;
 
 		if (!ref->peer_ref) {
@@ -276,29 +348,15 @@ static int do_send_pack(int in, int out, struct remote *remote, const char *dest
 		else
 			new_sha1 = ref->peer_ref->new_sha1;
 
-		if (!shown_dest) {
-			fprintf(stderr, "To %s\n", dest);
-			shown_dest = 1;
-		}
-
-		will_delete_ref = is_null_sha1(new_sha1);
-
-		pretty_ref = prettify_ref(ref->name);
-		if (!will_delete_ref)
-			pretty_peer = prettify_ref(ref->peer_ref->name);
 
-		if (will_delete_ref && !allow_deleting_refs) {
-			fprintf(stderr, " ! %-*s %s (remote does not support deleting refs)\n",
-					SUMMARY_WIDTH, "[rejected]", pretty_ref);
-			ret = -2;
+		ref->deletion = is_null_sha1(new_sha1);
+		if (ref->deletion && !allow_deleting_refs) {
+			ref->status = REF_STATUS_NODELETE;
 			continue;
 		}
-		if (!will_delete_ref &&
+		if (!ref->deletion &&
 		    !hashcmp(ref->old_sha1, new_sha1)) {
-			if (args.verbose)
-				fprintf(stderr, " = %-*s %s -> %s\n",
-					SUMMARY_WIDTH, "[up to date]",
-					pretty_peer, pretty_ref);
+			ref->status = REF_STATUS_UPTODATE;
 			continue;
 		}
 
@@ -321,33 +379,26 @@ static int do_send_pack(int in, int out, struct remote *remote, const char *dest
 		 *     always allowed.
 		 */
 
-		if (!args.force_update &&
-		    !will_delete_ref &&
+		ref->nonff =
+		    !ref->deletion &&
 		    !is_null_sha1(ref->old_sha1) &&
-		    !ref->force) {
-			if (!has_sha1_file(ref->old_sha1) ||
-			    !ref_newer(new_sha1, ref->old_sha1)) {
-				/* We do not have the remote ref, or
-				 * we know that the remote ref is not
-				 * an ancestor of what we are trying to
-				 * push.  Either way this can be losing
-				 * commits at the remote end and likely
-				 * we were not up to date to begin with.
-				 */
-				fprintf(stderr, " ! %-*s %s -> %s (non-fast forward)\n",
-						SUMMARY_WIDTH, "[rejected]",
-						pretty_peer, pretty_ref);
-				ret = -2;
-				continue;
-			}
+		    (!has_sha1_file(ref->old_sha1)
+		      || !ref_newer(new_sha1, ref->old_sha1));
+
+		if (ref->nonff && !ref->force && !args.force_update) {
+			ref->status = REF_STATUS_NONFF;
+			continue;
 		}
+
 		hashcpy(ref->new_sha1, new_sha1);
-		if (!will_delete_ref)
+		if (!ref->deletion)
 			new_refs++;
-		strcpy(old_hex, sha1_to_hex(ref->old_sha1));
-		new_hex = sha1_to_hex(ref->new_sha1);
+		ref->status = REF_STATUS_OK;
 
 		if (!args.dry_run) {
+			char *old_hex = sha1_to_hex(ref->old_sha1);
+			char *new_hex = sha1_to_hex(ref->new_sha1);
+
 			if (ask_for_status_report) {
 				packet_write(out, "%s %s %s%c%s",
 					old_hex, new_hex, ref->name, 0,
@@ -359,64 +410,42 @@ static int do_send_pack(int in, int out, struct remote *remote, const char *dest
 				packet_write(out, "%s %s %s",
 					old_hex, new_hex, ref->name);
 		}
-		if (will_delete_ref)
-			fprintf(stderr, " - %-*s %s\n",
-				SUMMARY_WIDTH, "[deleting]",
-				pretty_ref);
-		else if (is_null_sha1(ref->old_sha1)) {
-			const char *msg;
-
-			if (!prefixcmp(ref->name, "refs/tags/"))
-				msg = "[new tag]";
-			else
-				msg = "[new branch]";
-			fprintf(stderr, " * %-*s %s -> %s\n",
-				SUMMARY_WIDTH, msg,
-				pretty_peer, pretty_ref);
-		}
-		else {
-			char quickref[83];
-			char type = ' ';
-			const char *msg = "";
-			const char *old_abb;
-			old_abb = find_unique_abbrev(ref->old_sha1, DEFAULT_ABBREV);
-			strcpy(quickref, old_abb ? old_abb : old_hex);
-			if (ref_newer(ref->peer_ref->new_sha1, ref->old_sha1))
-				strcat(quickref, "..");
-			else {
-				strcat(quickref, "...");
-				type = '+';
-				msg = " (forced update)";
-			}
-			strcat(quickref, find_unique_abbrev(ref->new_sha1, DEFAULT_ABBREV));
-
-			fprintf(stderr, " %c %-*s %s -> %s%s\n",
-				type,
-				SUMMARY_WIDTH, quickref,
-				pretty_peer, pretty_ref,
-				msg);
-		}
 	}
 
 	packet_flush(out);
-	if (new_refs && !args.dry_run)
-		ret = pack_objects(out, remote_refs);
+	if (new_refs && !args.dry_run) {
+		if (pack_objects(out, remote_refs) < 0) {
+			close(out);
+			return -1;
+		}
+	}
 	close(out);
 
+	print_push_status(dest, remote_refs);
+
 	if (expect_status_report) {
 		if (receive_status(in))
-			ret = -4;
+			return -1;
 	}
 
-	if (!args.dry_run && remote && ret == 0) {
+	if (!args.dry_run && remote) {
 		for (ref = remote_refs; ref; ref = ref->next)
-			if (!is_null_sha1(ref->new_sha1))
-				update_tracking_ref(remote, ref);
+			update_tracking_ref(remote, ref);
 	}
 
-	if (!new_refs && ret == 0)
+	if (!new_refs)
 		fprintf(stderr, "Everything up-to-date\n");
-	return ret;
+	for (ref = remote_refs; ref; ref = ref->next) {
+		switch (ref->status) {
+		case REF_STATUS_NONE:
+		case REF_STATUS_UPTODATE:
+		case REF_STATUS_OK:
+			break;
+		default:
+			return -1;
+		}
+	}
+	return 0;
 }
 
 static void verify_remote_names(int nr_heads, const char **heads)
diff --git a/cache.h b/cache.h
index 5f40e12..ca5d96d 100644
--- a/cache.h
+++ b/cache.h
@@ -499,8 +499,17 @@ struct ref {
 	struct ref *next;
 	unsigned char old_sha1[20];
 	unsigned char new_sha1[20];
-	unsigned char force;
-	unsigned char merge;
+	unsigned char force : 1;
+	unsigned char merge : 1;
+	unsigned char nonff : 1;
+	unsigned char deletion : 1;
+	enum {
+		REF_STATUS_NONE = 0,
+		REF_STATUS_OK,
+		REF_STATUS_NONFF,
+		REF_STATUS_NODELETE,
+		REF_STATUS_UPTODATE,
+	} status;
 	struct ref *peer_ref; /* when renaming */
 	char name[FLEX_ARRAY]; /* more */
 };

-- 
1.5.3.5.1731.g0763