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#include "cache.h"
#include "xdiff/xdiff.h"
static const char merge_file_usage[] =
"git merge-file [-p | --stdout] [-q | --quiet] [-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, to_stdout = 0;
while (argc > 4) {
if (!strcmp(argv[1], "-L") && i < 3) {
names[i++] = argv[2];
argc--;
argv++;
} else if (!strcmp(argv[1], "-p") ||
!strcmp(argv[1], "--stdout"))
to_stdout = 1;
else if (!strcmp(argv[1], "-q") ||
!strcmp(argv[1], "--quiet"))
freopen("/dev/null", "w", stderr);
else
usage(merge_file_usage);
argc--;
argv++;
}
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 = to_stdout ? stdout : 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;
}
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