From ba1f5f353775ddbf97bc0d543888783630693023 Mon Sep 17 00:00:00 2001 From: Johannes Schindelin Date: Wed, 6 Dec 2006 16:26:06 +0100 Subject: Add builtin merge-file, a minimal replacement for RCS merge merge-file has the same syntax as RCS merge, but supports only the "-L" option. For good measure, a test is added, which is quite minimal, though. [jc: further fix for compliation errors included.] Signed-off-by: Johannes Schindelin Signed-off-by: Junio C Hamano --- builtin-merge-file.c | 72 ++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 72 insertions(+) create mode 100644 builtin-merge-file.c (limited to 'builtin-merge-file.c') diff --git a/builtin-merge-file.c b/builtin-merge-file.c new file mode 100644 index 0000000000..41fb92edfb --- /dev/null +++ b/builtin-merge-file.c @@ -0,0 +1,72 @@ +#include "cache.h" +#include "xdiff/xdiff.h" + +static const char merge_file_usage[] = +"git merge-file [-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; + + while (argc > 4) { + if (!strcmp(argv[1], "-L")) { + names[i++] = argv[2]; + argc -= 2; + argv += 2; + continue; + } + usage(merge_file_usage); + } + + 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 = 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; +} -- cgit v1.2.1