Merge branch 'nd/shallow-deepen'

The existing "git fetch --depth=<n>" option was hard to use
correctly when making the history of an existing shallow clone
deeper.  A new option, "--deepen=<n>", has been added to make this
easier to use.  "git clone" also learned "--shallow-since=<date>"
and "--shallow-exclude=<tag>" options to make it easier to specify
"I am interested only in the recent N months worth of history" and
"Give me only the history since that version".

* nd/shallow-deepen: (27 commits)
  fetch, upload-pack: --deepen=N extends shallow boundary by N commits
  upload-pack: add get_reachable_list()
  upload-pack: split check_unreachable() in two, prep for get_reachable_list()
  t5500, t5539: tests for shallow depth excluding a ref
  clone: define shallow clone boundary with --shallow-exclude
  fetch: define shallow boundary with --shallow-exclude
  upload-pack: support define shallow boundary by excluding revisions
  refs: add expand_ref()
  t5500, t5539: tests for shallow depth since a specific date
  clone: define shallow clone boundary based on time with --shallow-since
  fetch: define shallow boundary with --shallow-since
  upload-pack: add deepen-since to cut shallow repos based on time
  shallow.c: implement a generic shallow boundary finder based on rev-list
  fetch-pack: use a separate flag for fetch in deepening mode
  fetch-pack.c: mark strings for translating
  fetch-pack: use a common function for verbose printing
  fetch-pack: use skip_prefix() instead of starts_with()
  upload-pack: move rev-list code out of check_non_tip()
  upload-pack: make check_non_tip() clean things up on error
  upload-pack: tighten number parsing at "deepen" lines
  ...

1 files changed, 21 insertions, 6 deletions

diff --git a/builtin/fetch-pack.c b/builtin/fetch-pack.c
index bfd0be44a9..cfe9e447c2 100644
--- a/builtin/fetch-pack.c
+++ b/builtin/fetch-pack.c
@@ -51,6 +51,7 @@ int cmd_fetch_pack(int argc, const char **argv, const char *prefix)
 	struct child_process *conn;
 	struct fetch_pack_args args;
 	struct sha1_array shallow = SHA1_ARRAY_INIT;
+	struct string_list deepen_not = STRING_LIST_INIT_DUP;
 
 	packet_trace_identity("fetch-pack");
 
@@ -60,12 +61,12 @@ int cmd_fetch_pack(int argc, const char **argv, const char *prefix)
 	for (i = 1; i < argc && *argv[i] == '-'; i++) {
 		const char *arg = argv[i];
 
-		if (starts_with(arg, "--upload-pack=")) {
-			args.uploadpack = arg + 14;
+		if (skip_prefix(arg, "--upload-pack=", &arg)) {
+			args.uploadpack = arg;
 			continue;
 		}
-		if (starts_with(arg, "--exec=")) {
-			args.uploadpack = arg + 7;
+		if (skip_prefix(arg, "--exec=", &arg)) {
+			args.uploadpack = arg;
 			continue;
 		}
 		if (!strcmp("--quiet", arg) || !strcmp("-q", arg)) {
@@ -101,8 +102,20 @@ int cmd_fetch_pack(int argc, const char **argv, const char *prefix)
 			args.verbose = 1;
 			continue;
 		}
-		if (starts_with(arg, "--depth=")) {
-			args.depth = strtol(arg + 8, NULL, 0);
+		if (skip_prefix(arg, "--depth=", &arg)) {
+			args.depth = strtol(arg, NULL, 0);
+			continue;
+		}
+		if (skip_prefix(arg, "--shallow-since=", &arg)) {
+			args.deepen_since = xstrdup(arg);
+			continue;
+		}
+		if (skip_prefix(arg, "--shallow-exclude=", &arg)) {
+			string_list_append(&deepen_not, arg);
+			continue;
+		}
+		if (!strcmp(arg, "--deepen-relative")) {
+			args.deepen_relative = 1;
 			continue;
 		}
 		if (!strcmp("--no-progress", arg)) {
@@ -132,6 +145,8 @@ int cmd_fetch_pack(int argc, const char **argv, const char *prefix)
 		}
 		usage(fetch_pack_usage);
 	}
+	if (deepen_not.nr)
+		args.deepen_not = &deepen_not;
 
 	if (i < argc)
 		dest = argv[i++];