X-Git-Url: https://git.octo.it/?a=blobdiff_plain;f=fetch-pack.c;h=65e007639ac744c3f354f71c157a85c5d6477d49;hb=b32e986cd7a2b3ab4227d63657ef439786a82024;hp=e9035a1dc1e71fbac6e530eda3810848404f0f2d;hpb=def88e9afbf915ad76781aba7274398963b5e1a7;p=git.git

diff --git a/fetch-pack.c b/fetch-pack.c
index e9035a1d..65e00763 100644
--- a/fetch-pack.c
+++ b/fetch-pack.c
@@ -1,33 +1,26 @@
 #include "cache.h"
+#include "refs.h"
 #include "pkt-line.h"
+#include <sys/wait.h>
 
-static const char fetch_pack_usage[] = "git-fetch-pack [host:]directory [heads]* < mycommitlist";
+static int quiet;
+static const char fetch_pack_usage[] = "git-fetch-pack [-q] [--exec=upload-pack] [host:]directory [heads]* < mycommitlist";
 static const char *exec = "git-upload-pack";
 
-static int get_ack(int fd, unsigned char *result_sha1)
+static int find_common(int fd[2], unsigned char *result_sha1, unsigned char *remote)
 {
 	static char line[1000];
-	int len = packet_read_line(fd, line, sizeof(line));
+	int count = 0, flushes = 0, retval;
+	FILE *revs;
 
-	if (!len)
-		die("git-fetch-pack: expected ACK/NAK, got EOF");
-	if (line[len-1] == '\n')
-		line[--len] = 0;
-	if (!strcmp(line, "NAK"))
-		return 0;
-	if (!strncmp(line, "ACK ", 3)) {
-		if (!get_sha1_hex(line+4, result_sha1))
-			return 1;
-	}
-	die("git-fetch_pack: expected ACK/NAK, got '%s'", line);
-}
-
-static int find_common(int fd[2], unsigned char *result_sha1)
-{
-	static char line[1000];
-	int count = 0, flushes = 0;
-
-	while (fgets(line, sizeof(line), stdin) != NULL) {
+	revs = popen("git-rev-list $(git-rev-parse --all)", "r");
+	if (!revs)
+		die("unable to run 'git-rev-list'");
+	packet_write(fd[1], "want %s\n", sha1_to_hex(remote));
+	packet_flush(fd[1]);
+	flushes = 1;
+	retval = -1;
+	while (fgets(line, sizeof(line), revs) != NULL) {
 		unsigned char sha1[20];
 		if (get_sha1_hex(line, sha1))
 			die("git-fetch-pack: expected object name, got crud");
@@ -42,53 +35,76 @@ static int find_common(int fd[2], unsigned char *result_sha1)
 			 */
 			if (count == 32)
 				continue;
-			if (get_ack(fd[0], result_sha1))
-				return 0;
+			if (get_ack(fd[0], result_sha1)) {
+				flushes = 0;
+				retval = 0;
+				break;
+			}
 			flushes--;
 		}
 	}
-	flushes++;
-	packet_flush(fd[1]);
+	pclose(revs);
+	packet_write(fd[1], "done\n");
 	while (flushes) {
 		flushes--;
 		if (get_ack(fd[0], result_sha1))
 			return 0;
 	}
-	return -1;
-}
-
-static int get_remote_heads(int fd, int nr_match, char **match)
-{
-	for (;;) {
-		static char line[1000];
-		unsigned char sha1[20];
-		char *refname;
-		int len;
-
-		len = packet_read_line(fd, line, sizeof(line));
-		if (!len)
-			break;
-		if (line[len-1] == '\n')
-			line[--len] = 0;
-		if (len < 42 || get_sha1_hex(line, sha1))
-			die("git-fetch-pack: protocol error - expected ref descriptor, got '%sä'", line);
-		refname = line+41;
-		if (nr_match && !path_match(refname, nr_match, match))
-			continue;
-		printf("%s %s\n", sha1_to_hex(sha1), refname);
-	}
-	return 0;
+	return retval;
 }
 
+/*
+ * Eventually we'll want to be able to fetch multiple heads.
+ *
+ * Right now we'll just require a single match.
+ */
 static int fetch_pack(int fd[2], int nr_match, char **match)
 {
+	struct ref *ref;
 	unsigned char sha1[20];
+	int status;
+	pid_t pid;
 
-	get_remote_heads(fd[0], nr_match, match);
-	if (find_common(fd, sha1) < 0)
+	get_remote_heads(fd[0], &ref, nr_match, match);
+	if (!ref) {
+		packet_flush(fd[1]);
+		die("no matching remote head");
+	}
+	if (ref->next) {
+		packet_flush(fd[1]);
+		die("multiple remote heads");
+	}
+	if (find_common(fd, sha1, ref->old_sha1) < 0)
 		die("git-fetch-pack: no common commits");
-	printf("common commit: %s\n", sha1_to_hex(sha1));
-	return 0;
+	pid = fork();
+	if (pid < 0)
+		die("git-fetch-pack: unable to fork off git-unpack-objects");
+	if (!pid) {
+		dup2(fd[0], 0);
+		close(fd[0]);
+		close(fd[1]);
+		execlp("git-unpack-objects", "git-unpack-objects",
+		       quiet ? "-q" : NULL, NULL);
+		die("git-unpack-objects exec failed");
+	}
+	close(fd[0]);
+	close(fd[1]);
+	while (waitpid(pid, &status, 0) < 0) {
+		if (errno != EINTR)
+			die("waiting for git-unpack-objects: %s", strerror(errno));
+	}
+	if (WIFEXITED(status)) {
+		int code = WEXITSTATUS(status);
+		if (code)
+			die("git-unpack-objects died with error code %d", code);
+		puts(sha1_to_hex(ref->old_sha1));
+		return 0;
+	}
+	if (WIFSIGNALED(status)) {
+		int sig = WTERMSIG(status);
+		die("git-unpack-objects died of signal %d", sig);
+	}
+	die("Sherlock Holmes! git-unpack-objects died of unnatural causes %d!", status);
 }
 
 int main(int argc, char **argv)
@@ -104,7 +120,10 @@ int main(int argc, char **argv)
 		char *arg = argv[i];
 
 		if (*arg == '-') {
-			/* Arguments go here */
+			if (!strncmp("--exec=", arg, 7)) {
+				exec = arg + 7;
+				continue;
+			}
 			usage(fetch_pack_usage);
 		}
 		dest = arg;