Code

merge.conflictstyle: choose between "merge" and "diff3 -m" styles
[git.git] / builtin-merge-file.c
1 #include "builtin.h"
2 #include "cache.h"
3 #include "xdiff/xdiff.h"
4 #include "xdiff-interface.h"
6 static const char merge_file_usage[] =
7 "git merge-file [-p | --stdout] [--diff3] [-q | --quiet] [-L name1 [-L orig [-L name2]]] file1 orig_file file2";
9 int cmd_merge_file(int argc, const char **argv, const char *prefix)
10 {
11         const char *names[3];
12         mmfile_t mmfs[3];
13         mmbuffer_t result = {NULL, 0};
14         xpparam_t xpp = {XDF_NEED_MINIMAL};
15         int ret = 0, i = 0, to_stdout = 0;
16         int merge_level = XDL_MERGE_ZEALOUS_ALNUM;
17         int merge_style = 0;
18         int nongit;
20         prefix = setup_git_directory_gently(&nongit);
21         if (!nongit) {
22                 /* Read the configuration file */
23                 git_config(git_xmerge_config, NULL);
24                 if (0 <= git_xmerge_style)
25                         merge_style = git_xmerge_style;
26         }
28         while (argc > 4) {
29                 if (!strcmp(argv[1], "-L") && i < 3) {
30                         names[i++] = argv[2];
31                         argc--;
32                         argv++;
33                 } else if (!strcmp(argv[1], "-p") ||
34                                 !strcmp(argv[1], "--stdout"))
35                         to_stdout = 1;
36                 else if (!strcmp(argv[1], "-q") ||
37                                 !strcmp(argv[1], "--quiet"))
38                         freopen("/dev/null", "w", stderr);
39                 else if (!strcmp(argv[1], "--diff3"))
40                         merge_style = XDL_MERGE_DIFF3;
41                 else
42                         usage(merge_file_usage);
43                 argc--;
44                 argv++;
45         }
47         if (argc != 4)
48                 usage(merge_file_usage);
50         for (; i < 3; i++)
51                 names[i] = argv[i + 1];
53         for (i = 0; i < 3; i++) {
54                 if (read_mmfile(mmfs + i, argv[i + 1]))
55                         return -1;
56                 if (buffer_is_binary(mmfs[i].ptr, mmfs[i].size))
57                         return error("Cannot merge binary files: %s\n",
58                                         argv[i + 1]);
59         }
61         ret = xdl_merge(mmfs + 1, mmfs + 0, names[0], mmfs + 2, names[2],
62                         &xpp, merge_level | merge_style, &result);
64         for (i = 0; i < 3; i++)
65                 free(mmfs[i].ptr);
67         if (ret >= 0) {
68                 const char *filename = argv[1];
69                 FILE *f = to_stdout ? stdout : fopen(filename, "wb");
71                 if (!f)
72                         ret = error("Could not open %s for writing", filename);
73                 else if (result.size &&
74                          fwrite(result.ptr, result.size, 1, f) != 1)
75                         ret = error("Could not write to %s", filename);
76                 else if (fclose(f))
77                         ret = error("Could not close %s", filename);
78                 free(result.ptr);
79         }
81         return ret;
82 }