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73 lines
1.6 KiB
C
73 lines
1.6 KiB
C
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#include "cache.h"
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#include "xdiff/xdiff.h"
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static const char merge_file_usage[] =
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"git merge-file [-L name1 [-L orig [-L name2]]] file1 orig_file file2";
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static int read_file(mmfile_t *ptr, const char *filename)
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{
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struct stat st;
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FILE *f;
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if (stat(filename, &st))
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return error("Could not stat %s", filename);
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if ((f = fopen(filename, "rb")) == NULL)
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return error("Could not open %s", filename);
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ptr->ptr = xmalloc(st.st_size);
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if (fread(ptr->ptr, st.st_size, 1, f) != 1)
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return error("Could not read %s", filename);
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fclose(f);
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ptr->size = st.st_size;
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return 0;
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}
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int cmd_merge_file(int argc, char **argv, char **envp)
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{
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char *names[3];
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mmfile_t mmfs[3];
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mmbuffer_t result = {NULL, 0};
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xpparam_t xpp = {XDF_NEED_MINIMAL};
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int ret = 0, i = 0;
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while (argc > 4) {
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if (!strcmp(argv[1], "-L")) {
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names[i++] = argv[2];
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argc -= 2;
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argv += 2;
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continue;
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}
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usage(merge_file_usage);
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}
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if (argc != 4)
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usage(merge_file_usage);
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for (; i < 3; i++)
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names[i] = argv[i + 1];
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for (i = 0; i < 3; i++)
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if (read_file(mmfs + i, argv[i + 1]))
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return -1;
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ret = xdl_merge(mmfs + 1, mmfs + 0, names[0], mmfs + 2, names[2],
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&xpp, XDL_MERGE_ZEALOUS, &result);
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for (i = 0; i < 3; i++)
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free(mmfs[i].ptr);
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if (ret >= 0) {
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char *filename = argv[1];
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FILE *f = fopen(filename, "wb");
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if (!f)
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ret = error("Could not open %s for writing", filename);
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else if (fwrite(result.ptr, result.size, 1, f) != 1)
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ret = error("Could not write to %s", filename);
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else if (fclose(f))
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ret = error("Could not close %s", filename);
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free(result.ptr);
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}
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return ret;
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}
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