diff options
Diffstat (limited to 'builtin/rerere.c')
| -rw-r--r-- | builtin/rerere.c | 170 |
1 files changed, 170 insertions, 0 deletions
diff --git a/builtin/rerere.c b/builtin/rerere.c new file mode 100644 index 0000000000..642bf35587 --- /dev/null +++ b/builtin/rerere.c @@ -0,0 +1,170 @@ +#include "builtin.h" +#include "cache.h" +#include "dir.h" +#include "parse-options.h" +#include "string-list.h" +#include "rerere.h" +#include "xdiff/xdiff.h" +#include "xdiff-interface.h" + +static const char * const rerere_usage[] = { + "git rerere [clear | status | diff | gc]", + NULL, +}; + +/* these values are days */ +static int cutoff_noresolve = 15; +static int cutoff_resolve = 60; + +static time_t rerere_created_at(const char *name) +{ + struct stat st; + return stat(rerere_path(name, "preimage"), &st) ? (time_t) 0 : st.st_mtime; +} + +static time_t rerere_last_used_at(const char *name) +{ + struct stat st; + return stat(rerere_path(name, "postimage"), &st) ? (time_t) 0 : st.st_mtime; +} + +static void unlink_rr_item(const char *name) +{ + unlink(rerere_path(name, "thisimage")); + unlink(rerere_path(name, "preimage")); + unlink(rerere_path(name, "postimage")); + rmdir(git_path("rr-cache/%s", name)); +} + +static int git_rerere_gc_config(const char *var, const char *value, void *cb) +{ + if (!strcmp(var, "gc.rerereresolved")) + cutoff_resolve = git_config_int(var, value); + else if (!strcmp(var, "gc.rerereunresolved")) + cutoff_noresolve = git_config_int(var, value); + else + return git_default_config(var, value, cb); + return 0; +} + +static void garbage_collect(struct string_list *rr) +{ + struct string_list to_remove = STRING_LIST_INIT_DUP; + DIR *dir; + struct dirent *e; + int i, cutoff; + time_t now = time(NULL), then; + + git_config(git_rerere_gc_config, NULL); + dir = opendir(git_path("rr-cache")); + if (!dir) + die_errno("unable to open rr-cache directory"); + while ((e = readdir(dir))) { + if (is_dot_or_dotdot(e->d_name)) + continue; + + then = rerere_last_used_at(e->d_name); + if (then) { + cutoff = cutoff_resolve; + } else { + then = rerere_created_at(e->d_name); + if (!then) + continue; + cutoff = cutoff_noresolve; + } + if (then < now - cutoff * 86400) + string_list_append(&to_remove, e->d_name); + } + for (i = 0; i < to_remove.nr; i++) + unlink_rr_item(to_remove.items[i].string); + string_list_clear(&to_remove, 0); +} + +static int outf(void *dummy, mmbuffer_t *ptr, int nbuf) +{ + int i; + for (i = 0; i < nbuf; i++) + if (write_in_full(1, ptr[i].ptr, ptr[i].size) != ptr[i].size) + return -1; + return 0; +} + +static int diff_two(const char *file1, const char *label1, + const char *file2, const char *label2) +{ + xpparam_t xpp; + xdemitconf_t xecfg; + xdemitcb_t ecb; + mmfile_t minus, plus; + + if (read_mmfile(&minus, file1) || read_mmfile(&plus, file2)) + return 1; + + printf("--- a/%s\n+++ b/%s\n", label1, label2); + fflush(stdout); + memset(&xpp, 0, sizeof(xpp)); + xpp.flags = 0; + memset(&xecfg, 0, sizeof(xecfg)); + xecfg.ctxlen = 3; + ecb.outf = outf; + xdi_diff(&minus, &plus, &xpp, &xecfg, &ecb); + + free(minus.ptr); + free(plus.ptr); + return 0; +} + +int cmd_rerere(int argc, const char **argv, const char *prefix) +{ + struct string_list merge_rr = STRING_LIST_INIT_DUP; + int i, fd, autoupdate = -1, flags = 0; + + struct option options[] = { + OPT_SET_INT(0, "rerere-autoupdate", &autoupdate, + "register clean resolutions in index", 1), + OPT_END(), + }; + + argc = parse_options(argc, argv, prefix, options, rerere_usage, 0); + + if (autoupdate == 1) + flags = RERERE_AUTOUPDATE; + if (autoupdate == 0) + flags = RERERE_NOAUTOUPDATE; + + if (argc < 1) + return rerere(flags); + + if (!strcmp(argv[0], "forget")) { + const char **pathspec = get_pathspec(prefix, argv + 1); + return rerere_forget(pathspec); + } + + fd = setup_rerere(&merge_rr, flags); + if (fd < 0) + return 0; + + if (!strcmp(argv[0], "clear")) { + for (i = 0; i < merge_rr.nr; i++) { + const char *name = (const char *)merge_rr.items[i].util; + if (!has_rerere_resolution(name)) + unlink_rr_item(name); + } + unlink_or_warn(git_path("MERGE_RR")); + } else if (!strcmp(argv[0], "gc")) + garbage_collect(&merge_rr); + else if (!strcmp(argv[0], "status")) + for (i = 0; i < merge_rr.nr; i++) + printf("%s\n", merge_rr.items[i].string); + else if (!strcmp(argv[0], "diff")) + for (i = 0; i < merge_rr.nr; i++) { + const char *path = merge_rr.items[i].string; + const char *name = (const char *)merge_rr.items[i].util; + diff_two(rerere_path(name, "preimage"), path, path, path); + } + else + usage_with_options(rerere_usage, options); + + string_list_clear(&merge_rr, 1); + return 0; +} |