X-Git-Url: https://git.octo.it/?a=blobdiff_plain;f=upload-pack.c;h=878254d72f6448ff3a6cfb59650ef9a71d75ddde;hb=6d0de319d6249096fe934317e937177d07b1b84f;hp=da10742c44201cfb6f86eb8d80f3be27940335ff;hpb=c1067050ce58b5b39f528fe634732da858664603;p=git.git

diff --git a/upload-pack.c b/upload-pack.c
index da10742c..878254d7 100644
--- a/upload-pack.c
+++ b/upload-pack.c
@@ -1,14 +1,24 @@
 #include "cache.h"
 #include "refs.h"
 #include "pkt-line.h"
+#include "tag.h"
+#include "object.h"
 
-static const char upload_pack_usage[] = "git-upload-pack <dir>";
+static const char upload_pack_usage[] = "git-upload-pack [--strict] [--timeout=nn] <dir>";
 
-#define MAX_HAS (16)
-#define MAX_NEEDS (256)
-static int nr_has = 0, nr_needs = 0;
+#define OUR_REF (1U << 1)
+#define WANTED (1U << 2)
+#define MAX_HAS 256
+#define MAX_NEEDS 256
+static int nr_has = 0, nr_needs = 0, nr_our_refs = 0;
 static unsigned char has_sha1[MAX_HAS][20];
 static unsigned char needs_sha1[MAX_NEEDS][20];
+static unsigned int timeout = 0;
+
+static void reset_timeout(void)
+{
+	alarm(timeout);
+}
 
 static int strip(char *line, int len)
 {
@@ -21,6 +31,7 @@ static void create_pack_file(void)
 {
 	int fd[2];
 	pid_t pid;
+	int create_full_pack = (nr_our_refs == nr_needs && !nr_has);
 
 	if (pipe(fd) < 0)
 		die("git-upload-pack: unable to create pipe");
@@ -30,10 +41,18 @@ static void create_pack_file(void)
 
 	if (!pid) {
 		int i;
-		int args = nr_has + nr_needs + 5;
-		char **argv = xmalloc(args * sizeof(char *));
-		char *buf = xmalloc(args * 45);
-		char **p = argv;
+		int args;
+		char **argv;
+		char *buf;
+		char **p;
+
+		if (create_full_pack)
+			args = 10;
+		else
+			args = nr_has + nr_needs + 5;
+		argv = xmalloc(args * sizeof(char *));
+		buf = xmalloc(args * 45);
+		p = argv;
 
 		dup2(fd[1], 1);
 		close(0);
@@ -41,17 +60,22 @@ static void create_pack_file(void)
 		close(fd[1]);
 		*p++ = "git-rev-list";
 		*p++ = "--objects";
-		for (i = 0; i < nr_needs; i++) {
-			*p++ = buf;
-			memcpy(buf, sha1_to_hex(needs_sha1[i]), 41);
-			buf += 41;
-		}
-		for (i = 0; i < nr_has; i++) {
-			*p++ = buf;
-			*buf++ = '^';
-			memcpy(buf, sha1_to_hex(has_sha1[i]), 41);
-			buf += 41;
+		if (create_full_pack || MAX_NEEDS <= nr_needs)
+			*p++ = "--all";
+		else {
+			for (i = 0; i < nr_needs; i++) {
+				*p++ = buf;
+				memcpy(buf, sha1_to_hex(needs_sha1[i]), 41);
+				buf += 41;
+			}
 		}
+		if (!create_full_pack)
+			for (i = 0; i < nr_has; i++) {
+				*p++ = buf;
+				*buf++ = '^';
+				memcpy(buf, sha1_to_hex(has_sha1[i]), 41);
+				buf += 41;
+			}
 		*p++ = NULL;
 		execvp("git-rev-list", argv);
 		die("git-upload-pack: unable to exec git-rev-list");
@@ -86,6 +110,7 @@ static int get_common_commits(void)
 
 	for(;;) {
 		len = packet_read_line(0, line, sizeof(line));
+		reset_timeout();
 
 		if (!len) {
 			packet_write(1, "NAK\n");
@@ -108,6 +133,7 @@ static int get_common_commits(void)
 
 	for (;;) {
 		len = packet_read_line(0, line, sizeof(line));
+		reset_timeout();
 		if (!len)
 			continue;
 		len = strip(line, len);
@@ -129,30 +155,64 @@ static int receive_needs(void)
 
 	needs = 0;
 	for (;;) {
+		struct object *o;
+		unsigned char dummy[20], *sha1_buf;
 		len = packet_read_line(0, line, sizeof(line));
+		reset_timeout();
 		if (!len)
 			return needs;
 
-		/*
-		 * This is purely theoretical right now: git-fetch-pack only
-		 * ever asks for a single HEAD
+		sha1_buf = dummy;
+		if (needs == MAX_NEEDS) {
+			fprintf(stderr,
+				"warning: supporting only a max of %d requests. "
+				"sending everything instead.\n",
+				MAX_NEEDS);
+		}
+		else if (needs < MAX_NEEDS)
+			sha1_buf = needs_sha1[needs];
+
+		if (strncmp("want ", line, 5) || get_sha1_hex(line+5, sha1_buf))
+			die("git-upload-pack: protocol error, "
+			    "expected to get sha, not '%s'", line);
+
+		/* We have sent all our refs already, and the other end
+		 * should have chosen out of them; otherwise they are
+		 * asking for nonsense.
+		 *
+		 * Hmph.  We may later want to allow "want" line that
+		 * asks for something like "master~10" (symbolic)...
+		 * would it make sense?  I don't know.
 		 */
-		if (needs >= MAX_NEEDS)
-			die("I'm only doing a max of %d requests", MAX_NEEDS);
-		if (strncmp("want ", line, 5) || get_sha1_hex(line+5, needs_sha1[needs]))
-			die("git-upload-pack: protocol error, expected to get sha, not '%s'", line);
-		needs++;
+		o = lookup_object(sha1_buf);
+		if (!o || !(o->flags & OUR_REF))
+			die("git-upload-pack: not our ref %s", line+5);
+		if (!(o->flags & WANTED)) {
+			o->flags |= WANTED;
+			needs++;
+		}
 	}
 }
 
 static int send_ref(const char *refname, const unsigned char *sha1)
 {
+	struct object *o = parse_object(sha1);
+
 	packet_write(1, "%s %s\n", sha1_to_hex(sha1), refname);
+	if (!(o->flags & OUR_REF)) {
+		o->flags |= OUR_REF;
+		nr_our_refs++;
+	}
+	if (o->type == tag_type) {
+		o = deref_tag(o);
+		packet_write(1, "%s %s^{}\n", sha1_to_hex(o->sha1), refname);
+	}
 	return 0;
 }
 
 static int upload_pack(void)
 {
+	reset_timeout();
 	head_ref(send_ref);
 	for_each_ref(send_ref);
 	packet_flush(1);
@@ -167,18 +227,43 @@ static int upload_pack(void)
 int main(int argc, char **argv)
 {
 	const char *dir;
-	if (argc != 2)
+	int i;
+	int strict = 0;
+
+	for (i = 1; i < argc; i++) {
+		char *arg = argv[i];
+
+		if (arg[0] != '-')
+			break;
+		if (!strcmp(arg, "--strict")) {
+			strict = 1;
+			continue;
+		}
+		if (!strncmp(arg, "--timeout=", 10)) {
+			timeout = atoi(arg+10);
+			continue;
+		}
+		if (!strcmp(arg, "--")) {
+			i++;
+			break;
+		}
+	}
+	
+	if (i != argc-1)
 		usage(upload_pack_usage);
-	dir = argv[1];
+	dir = argv[i];
 
 	/* chdir to the directory. If that fails, try appending ".git" */
 	if (chdir(dir) < 0) {
-		if (chdir(mkpath("%s.git", dir)) < 0)
+		if (strict || chdir(mkpath("%s.git", dir)) < 0)
 			die("git-upload-pack unable to chdir to %s", dir);
 	}
-	chdir(".git");
+	if (!strict)
+		chdir(".git");
+
 	if (access("objects", X_OK) || access("refs", X_OK))
 		die("git-upload-pack: %s doesn't seem to be a git archive", dir);
+
 	putenv("GIT_DIR=.");
 	upload_pack();
 	return 0;