1 files changed, 155 insertions, 0 deletions
diff --git a/local-pull.c b/local-pull.c
new file mode 100644
index 0000000000..b715203f6f
--- /dev/null
+++ b/local-pull.c
@@ -0,0 +1,155 @@
+/*
+ * Copyright (C) 2005 Junio C Hamano
+ */
+#include "cache.h"
+#include "commit.h"
+#include "pull.h"
+
+static int use_link = 0;
+static int use_symlink = 0;
+static int use_filecopy = 1;
+
+static char *path; /* "Remote" git repository */
+
+void prefetch(unsigned char *sha1)
+{
+}
+
+int fetch(unsigned char *sha1)
+{
+	static int object_name_start = -1;
+	static char filename[PATH_MAX];
+	char *hex = sha1_to_hex(sha1);
+	const char *dest_filename = sha1_file_name(sha1);
+
+	if (object_name_start < 0) {
+		strcpy(filename, path); /* e.g. git.git */
+		strcat(filename, "/objects/");
+		object_name_start = strlen(filename);
+	}
+	filename[object_name_start+0] = hex[0];
+	filename[object_name_start+1] = hex[1];
+	filename[object_name_start+2] = '/';
+	strcpy(filename + object_name_start + 3, hex + 2);
+	if (use_link) {
+		if (!link(filename, dest_filename)) {
+			pull_say("link %s\n", hex);
+			return 0;
+		}
+		/* If we got ENOENT there is no point continuing. */
+		if (errno == ENOENT) {
+			fprintf(stderr, "does not exist %s\n", filename);
+			return -1;
+		}
+	}
+	if (use_symlink && !symlink(filename, dest_filename)) {
+		pull_say("symlink %s\n", hex);
+		return 0;
+	}
+	if (use_filecopy) {
+		int ifd, ofd, status;
+		struct stat st;
+		void *map;
+		ifd = open(filename, O_RDONLY);
+		if (ifd < 0 || fstat(ifd, &st) < 0) {
+			close(ifd);
+			fprintf(stderr, "cannot open %s\n", filename);
+			return -1;
+		}
+		map = mmap(NULL, st.st_size, PROT_READ, MAP_PRIVATE, ifd, 0);
+		close(ifd);
+		if (map == MAP_FAILED) {
+			fprintf(stderr, "cannot mmap %s\n", filename);
+			return -1;
+		}
+		ofd = open(dest_filename, O_WRONLY | O_CREAT | O_EXCL, 0666);
+		status = ((ofd < 0) ||
+			  (write(ofd, map, st.st_size) != st.st_size));
+		munmap(map, st.st_size);
+		close(ofd);
+		if (status)
+			fprintf(stderr, "cannot write %s\n", dest_filename);
+		else
+			pull_say("copy %s\n", hex);
+		return status;
+	}
+	fprintf(stderr, "failed to copy %s with given copy methods.\n", hex);
+	return -1;
+}
+
+int fetch_ref(char *ref, unsigned char *sha1)
+{
+	static int ref_name_start = -1;
+	static char filename[PATH_MAX];
+	static char hex[41];
+	int ifd;
+
+	if (ref_name_start < 0) {
+		sprintf(filename, "%s/refs/", path);
+		ref_name_start = strlen(filename);
+	}
+	strcpy(filename + ref_name_start, ref);
+	ifd = open(filename, O_RDONLY);
+	if (ifd < 0) {
+		close(ifd);
+		fprintf(stderr, "cannot open %s\n", filename);
+		return -1;
+	}
+	if (read(ifd, hex, 40) != 40 || get_sha1_hex(hex, sha1)) {
+		close(ifd);
+		fprintf(stderr, "cannot read from %s\n", filename);
+		return -1;
+	}
+	close(ifd);
+	pull_say("ref %s\n", sha1_to_hex(sha1));
+	return 0;
+}
+
+static const char local_pull_usage[] =
+"git-local-pull [-c] [-t] [-a] [-d] [-v] [-w filename] [--recover] [-l] [-s] [-n] commit-id path";
+
+/* 
+ * By default we only use file copy.
+ * If -l is specified, a hard link is attempted.
+ * If -s is specified, then a symlink is attempted.
+ * If -n is _not_ specified, then a regular file-to-file copy is done.
+ */
+int main(int argc, char **argv)
+{
+	char *commit_id;
+	int arg = 1;
+
+	while (arg < argc && argv[arg][0] == '-') {
+		if (argv[arg][1] == 't')
+			get_tree = 1;
+		else if (argv[arg][1] == 'c')
+			get_history = 1;
+		else if (argv[arg][1] == 'a') {
+			get_all = 1;
+			get_tree = 1;
+			get_history = 1;
+		}
+		else if (argv[arg][1] == 'l')
+			use_link = 1;
+		else if (argv[arg][1] == 's')
+			use_symlink = 1;
+		else if (argv[arg][1] == 'n')
+			use_filecopy = 0;
+		else if (argv[arg][1] == 'v')
+			get_verbosely = 1;
+		else if (argv[arg][1] == 'w')
+			write_ref = argv[++arg];
+		else
+			usage(local_pull_usage);
+		arg++;
+	}
+	if (argc < arg + 2)
+		usage(local_pull_usage);
+	commit_id = argv[arg];
+	path = argv[arg + 1];
+
+	if (pull(commit_id))
+		return 1;
+
+	return 0;
+}