diff options
Diffstat (limited to 'rerere.c')
| -rw-r--r-- | rerere.c | 133 |
1 files changed, 133 insertions, 0 deletions
@@ -3,6 +3,9 @@ #include "rerere.h" #include "xdiff/xdiff.h" #include "xdiff-interface.h" +#include "dir.h" +#include "resolve-undo.h" +#include "ll-merge.h" /* if rerere_enabled == -1, fall back to detection of .git/rr-cache */ static int rerere_enabled = -1; @@ -223,6 +226,87 @@ static int handle_file(const char *path, unsigned char *sha1, const char *output return hunk_no; } +struct rerere_io_mem { + struct rerere_io io; + struct strbuf input; +}; + +static int rerere_mem_getline(struct strbuf *sb, struct rerere_io *io_) +{ + struct rerere_io_mem *io = (struct rerere_io_mem *)io_; + char *ep; + size_t len; + + strbuf_release(sb); + if (!io->input.len) + return -1; + ep = strchrnul(io->input.buf, '\n'); + if (*ep == '\n') + ep++; + len = ep - io->input.buf; + strbuf_add(sb, io->input.buf, len); + strbuf_remove(&io->input, 0, len); + return 0; +} + +static int handle_cache(const char *path, unsigned char *sha1, const char *output) +{ + mmfile_t mmfile[3]; + mmbuffer_t result = {NULL, 0}; + struct cache_entry *ce; + int pos, len, i, hunk_no; + struct rerere_io_mem io; + + /* + * Reproduce the conflicted merge in-core + */ + len = strlen(path); + pos = cache_name_pos(path, len); + if (0 <= pos) + return -1; + pos = -pos - 1; + + for (i = 0; i < 3; i++) { + enum object_type type; + unsigned long size; + + mmfile[i].size = 0; + mmfile[i].ptr = NULL; + if (active_nr <= pos) + break; + ce = active_cache[pos++]; + if (ce_namelen(ce) != len || memcmp(ce->name, path, len) + || ce_stage(ce) != i + 1) + break; + mmfile[i].ptr = read_sha1_file(ce->sha1, &type, &size); + mmfile[i].size = size; + } + for (i = 0; i < 3; i++) { + if (!mmfile[i].ptr && !mmfile[i].size) + mmfile[i].ptr = xstrdup(""); + } + ll_merge(&result, path, &mmfile[0], + &mmfile[1], "ours", + &mmfile[2], "theirs", 0); + for (i = 0; i < 3; i++) + free(mmfile[i].ptr); + + memset(&io, 0, sizeof(&io)); + io.io.getline = rerere_mem_getline; + if (output) + io.io.output = fopen(output, "w"); + else + io.io.output = NULL; + strbuf_init(&io.input, 0); + strbuf_attach(&io.input, result.ptr, result.size, result.size); + + hunk_no = handle_path(sha1, (struct rerere_io *)&io); + strbuf_release(&io.input); + if (io.io.output) + fclose(io.io.output); + return hunk_no; +} + static int find_conflict(struct string_list *conflict) { int i; @@ -434,3 +518,52 @@ int rerere(void) return 0; return do_plain_rerere(&merge_rr, fd); } + +static int rerere_forget_one_path(const char *path, struct string_list *rr) +{ + const char *filename; + char *hex; + unsigned char sha1[20]; + int ret; + + ret = handle_cache(path, sha1, NULL); + if (ret < 1) + return error("Could not parse conflict hunks in '%s'", path); + hex = xstrdup(sha1_to_hex(sha1)); + filename = rerere_path(hex, "postimage"); + if (unlink(filename)) + return (errno == ENOENT + ? error("no remembered resolution for %s", path) + : error("cannot unlink %s: %s", filename, strerror(errno))); + + handle_cache(path, sha1, rerere_path(hex, "preimage")); + fprintf(stderr, "Updated preimage for '%s'\n", path); + + + string_list_insert(path, rr)->util = hex; + fprintf(stderr, "Forgot resolution for %s\n", path); + return 0; +} + +int rerere_forget(const char **pathspec) +{ + int i, fd; + struct string_list conflict = { NULL, 0, 0, 1 }; + struct string_list merge_rr = { NULL, 0, 0, 1 }; + + if (read_cache() < 0) + return error("Could not read index"); + + fd = setup_rerere(&merge_rr); + + unmerge_cache(pathspec); + find_conflict(&conflict); + for (i = 0; i < conflict.nr; i++) { + struct string_list_item *it = &conflict.items[i]; + if (!match_pathspec(pathspec, it->string, strlen(it->string), + 0, NULL)) + continue; + rerere_forget_one_path(it->string, &merge_rr); + } + return write_rr(&merge_rr, fd); +} |