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-rw-r--r--builtin/merge-file.c106
1 files changed, 106 insertions, 0 deletions
diff --git a/builtin/merge-file.c b/builtin/merge-file.c
new file mode 100644
index 0000000..237abd3
--- /dev/null
+++ b/builtin/merge-file.c
@@ -0,0 +1,106 @@
+#include "builtin.h"
+#include "cache.h"
+#include "xdiff/xdiff.h"
+#include "xdiff-interface.h"
+#include "parse-options.h"
+
+static const char *const merge_file_usage[] = {
+ "git merge-file [options] [-L name1 [-L orig [-L name2]]] file1 orig_file file2",
+ NULL
+};
+
+static int label_cb(const struct option *opt, const char *arg, int unset)
+{
+ static int label_count = 0;
+ const char **names = (const char **)opt->value;
+
+ if (label_count >= 3)
+ return error("too many labels on the command line");
+ names[label_count++] = arg;
+ return 0;
+}
+
+int cmd_merge_file(int argc, const char **argv, const char *prefix)
+{
+ const char *names[3] = { NULL, NULL, NULL };
+ mmfile_t mmfs[3];
+ mmbuffer_t result = {NULL, 0};
+ xmparam_t xmp = {{0}};
+ int ret = 0, i = 0, to_stdout = 0;
+ int quiet = 0;
+ int prefixlen = 0;
+ struct option options[] = {
+ OPT_BOOLEAN('p', "stdout", &to_stdout, "send results to standard output"),
+ OPT_SET_INT(0, "diff3", &xmp.style, "use a diff3 based merge", XDL_MERGE_DIFF3),
+ OPT_SET_INT(0, "ours", &xmp.favor, "for conflicts, use our version",
+ XDL_MERGE_FAVOR_OURS),
+ OPT_SET_INT(0, "theirs", &xmp.favor, "for conflicts, use their version",
+ XDL_MERGE_FAVOR_THEIRS),
+ OPT_SET_INT(0, "union", &xmp.favor, "for conflicts, use a union version",
+ XDL_MERGE_FAVOR_UNION),
+ OPT_INTEGER(0, "marker-size", &xmp.marker_size,
+ "for conflicts, use this marker size"),
+ OPT__QUIET(&quiet, "do not warn about conflicts"),
+ OPT_CALLBACK('L', NULL, names, "name",
+ "set labels for file1/orig_file/file2", &label_cb),
+ OPT_END(),
+ };
+
+ xmp.level = XDL_MERGE_ZEALOUS_ALNUM;
+ xmp.style = 0;
+ xmp.favor = 0;
+
+ if (startup_info->have_repository) {
+ /* Read the configuration file */
+ git_config(git_xmerge_config, NULL);
+ if (0 <= git_xmerge_style)
+ xmp.style = git_xmerge_style;
+ }
+
+ argc = parse_options(argc, argv, prefix, options, merge_file_usage, 0);
+ if (argc != 3)
+ usage_with_options(merge_file_usage, options);
+ if (quiet) {
+ if (!freopen("/dev/null", "w", stderr))
+ return error("failed to redirect stderr to /dev/null: "
+ "%s\n", strerror(errno));
+ }
+
+ if (prefix)
+ prefixlen = strlen(prefix);
+
+ for (i = 0; i < 3; i++) {
+ const char *fname = prefix_filename(prefix, prefixlen, argv[i]);
+ if (!names[i])
+ names[i] = argv[i];
+ if (read_mmfile(mmfs + i, fname))
+ return -1;
+ if (buffer_is_binary(mmfs[i].ptr, mmfs[i].size))
+ return error("Cannot merge binary files: %s\n",
+ argv[i]);
+ }
+
+ xmp.ancestor = names[1];
+ xmp.file1 = names[0];
+ xmp.file2 = names[2];
+ ret = xdl_merge(mmfs + 1, mmfs + 0, mmfs + 2, &xmp, &result);
+
+ for (i = 0; i < 3; i++)
+ free(mmfs[i].ptr);
+
+ if (ret >= 0) {
+ const char *filename = argv[0];
+ FILE *f = to_stdout ? stdout : fopen(filename, "wb");
+
+ if (!f)
+ ret = error("Could not open %s for writing", filename);
+ else if (result.size &&
+ 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;
+}