Move "get_ack()" to common git_connect functions

git-clone-pack will want it too. Soon.

cache.h

@@ -263,6 +263,7 @@ struct pack_entry {
 extern int git_connect(int fd[2], char *url, const char *prog);
 extern int finish_connect(pid_t pid);
 extern int path_match(const char *path, int nr, char **match);
+extern int get_ack(int fd, unsigned char *result_sha1);
 
 extern void prepare_packed_git(void);
 extern int use_packed_git(struct packed_git *);

connect.c

@@ -1,6 +1,25 @@
 #include "cache.h"
+#include "pkt-line.h"
 #include <sys/wait.h>
 
+int get_ack(int fd, unsigned char *result_sha1)
+{
+	static char line[1000];
+	int len = packet_read_line(fd, line, sizeof(line));
+
+	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);
+}
+
 int path_match(const char *path, int nr, char **match)
 {
 	int i;

fetch-pack.c

@@ -6,24 +6,6 @@
 static const char fetch_pack_usage[] = "git-fetch-pack [host:]directory [heads]* < mycommitlist";
 static const char *exec = "git-upload-pack";
 
-static int get_ack(int fd, unsigned char *result_sha1)
-{
-	static char line[1000];
-	int len = packet_read_line(fd, line, sizeof(line));
-
-	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, unsigned char *remote)
 {
 	static char line[1000];