Andrew's git - gitweb.git/blob - builtin-merge-file.c

   1#include "builtin.h"
   2#include "cache.h"
   3#include "xdiff/xdiff.h"
   4#include "xdiff-interface.h"
   5
   6static const char merge_file_usage[] =
   7"git merge-file [-p | --stdout] [--diff3] [-q | --quiet] [-L name1 [-L orig [-L name2]]] file1 orig_file file2";
   8
   9int 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
  19        while (argc > 4) {
  20                if (!strcmp(argv[1], "-L") && i < 3) {
  21                        names[i++] = argv[2];
  22                        argc--;
  23                        argv++;
  24                } else if (!strcmp(argv[1], "-p") ||
  25                                !strcmp(argv[1], "--stdout"))
  26                        to_stdout = 1;
  27                else if (!strcmp(argv[1], "-q") ||
  28                                !strcmp(argv[1], "--quiet"))
  29                        freopen("/dev/null", "w", stderr);
  30                else if (!strcmp(argv[1], "--diff3")) {
  31                        merge_style = XDL_MERGE_DIFF3;
  32                        merge_level = XDL_MERGE_EAGER;
  33                }
  34                else
  35                        usage(merge_file_usage);
  36                argc--;
  37                argv++;
  38        }
  39
  40        if (argc != 4)
  41                usage(merge_file_usage);
  42
  43        for (; i < 3; i++)
  44                names[i] = argv[i + 1];
  45
  46        for (i = 0; i < 3; i++) {
  47                if (read_mmfile(mmfs + i, argv[i + 1]))
  48                        return -1;
  49                if (buffer_is_binary(mmfs[i].ptr, mmfs[i].size))
  50                        return error("Cannot merge binary files: %s\n",
  51                                        argv[i + 1]);
  52        }
  53
  54        ret = xdl_merge(mmfs + 1, mmfs + 0, names[0], mmfs + 2, names[2],
  55                        &xpp, merge_level | merge_style, &result);
  56
  57        for (i = 0; i < 3; i++)
  58                free(mmfs[i].ptr);
  59
  60        if (ret >= 0) {
  61                const char *filename = argv[1];
  62                FILE *f = to_stdout ? stdout : fopen(filename, "wb");
  63
  64                if (!f)
  65                        ret = error("Could not open %s for writing", filename);
  66                else if (result.size &&
  67                         fwrite(result.ptr, result.size, 1, f) != 1)
  68                        ret = error("Could not write to %s", filename);
  69                else if (fclose(f))
  70                        ret = error("Could not close %s", filename);
  71                free(result.ptr);
  72        }
  73
  74        return ret;
  75}