summaryrefslogtreecommitdiff
path: root/builtin-merge-file.c
diff options
context:
space:
mode:
authorJohannes Schindelin <Johannes.Schindelin@gmx.de>2006-12-06 15:26:06 (GMT)
committerJunio C Hamano <junkio@cox.net>2006-12-06 18:00:24 (GMT)
commitba1f5f353775ddbf97bc0d543888783630693023 (patch)
tree2b12778fc9f164fd3acbc3c5ccc95846096c741b /builtin-merge-file.c
parent98e6da8a360b77af2924e8056fd951013835699b (diff)
downloadgit-ba1f5f353775ddbf97bc0d543888783630693023.zip
git-ba1f5f353775ddbf97bc0d543888783630693023.tar.gz
git-ba1f5f353775ddbf97bc0d543888783630693023.tar.bz2
Add builtin merge-file, a minimal replacement for RCS merge
merge-file has the same syntax as RCS merge, but supports only the "-L" option. For good measure, a test is added, which is quite minimal, though. [jc: further fix for compliation errors included.] Signed-off-by: Johannes Schindelin <Johannes.Schindelin@gmx.de> Signed-off-by: Junio C Hamano <junkio@cox.net>
Diffstat (limited to 'builtin-merge-file.c')
-rw-r--r--builtin-merge-file.c72
1 files changed, 72 insertions, 0 deletions
diff --git a/builtin-merge-file.c b/builtin-merge-file.c
new file mode 100644
index 0000000..41fb92e
--- /dev/null
+++ b/builtin-merge-file.c
@@ -0,0 +1,72 @@
+#include "cache.h"
+#include "xdiff/xdiff.h"
+
+static const char merge_file_usage[] =
+"git merge-file [-L name1 [-L orig [-L name2]]] file1 orig_file file2";
+
+static int read_file(mmfile_t *ptr, const char *filename)
+{
+ struct stat st;
+ FILE *f;
+
+ if (stat(filename, &st))
+ return error("Could not stat %s", filename);
+ if ((f = fopen(filename, "rb")) == NULL)
+ return error("Could not open %s", filename);
+ ptr->ptr = xmalloc(st.st_size);
+ if (fread(ptr->ptr, st.st_size, 1, f) != 1)
+ return error("Could not read %s", filename);
+ fclose(f);
+ ptr->size = st.st_size;
+ return 0;
+}
+
+int cmd_merge_file(int argc, char **argv, char **envp)
+{
+ char *names[3];
+ mmfile_t mmfs[3];
+ mmbuffer_t result = {NULL, 0};
+ xpparam_t xpp = {XDF_NEED_MINIMAL};
+ int ret = 0, i = 0;
+
+ while (argc > 4) {
+ if (!strcmp(argv[1], "-L")) {
+ names[i++] = argv[2];
+ argc -= 2;
+ argv += 2;
+ continue;
+ }
+ usage(merge_file_usage);
+ }
+
+ if (argc != 4)
+ usage(merge_file_usage);
+
+ for (; i < 3; i++)
+ names[i] = argv[i + 1];
+
+ for (i = 0; i < 3; i++)
+ if (read_file(mmfs + i, argv[i + 1]))
+ return -1;
+
+ ret = xdl_merge(mmfs + 1, mmfs + 0, names[0], mmfs + 2, names[2],
+ &xpp, XDL_MERGE_ZEALOUS, &result);
+
+ for (i = 0; i < 3; i++)
+ free(mmfs[i].ptr);
+
+ if (ret >= 0) {
+ char *filename = argv[1];
+ FILE *f = fopen(filename, "wb");
+
+ if (!f)
+ ret = error("Could not open %s for writing", filename);
+ else if (fwrite(result.ptr, result.size, 1, f) != 1)
+ ret = error("Could not write to %s", filename);
+ else if (fclose(f))
+ ret = error("Could not close %s", filename);
+ free(result.ptr);
+ }
+
+ return ret;
+}