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e5f591720c
The rr-cache directory should always exist if we are doing garbage collection (earlier code paths check this explicitly), but we may not necessarily succeed in opening it (for example, due to permissions problems). In that case, we should print an error message rather than simply segfaulting. Signed-off-by: Jeff King <peff@peff.net> Signed-off-by: Junio C Hamano <gitster@pobox.com>
138 lines
3.4 KiB
C
138 lines
3.4 KiB
C
#include "builtin.h"
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#include "cache.h"
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#include "dir.h"
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#include "string-list.h"
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#include "rerere.h"
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#include "xdiff/xdiff.h"
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#include "xdiff-interface.h"
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static const char git_rerere_usage[] =
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"git rerere [clear | status | diff | gc]";
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/* these values are days */
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static int cutoff_noresolve = 15;
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static int cutoff_resolve = 60;
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static time_t rerere_created_at(const char *name)
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{
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struct stat st;
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return stat(rerere_path(name, "preimage"), &st) ? (time_t) 0 : st.st_mtime;
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}
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static void unlink_rr_item(const char *name)
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{
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unlink(rerere_path(name, "thisimage"));
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unlink(rerere_path(name, "preimage"));
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unlink(rerere_path(name, "postimage"));
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rmdir(git_path("rr-cache/%s", name));
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}
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static int git_rerere_gc_config(const char *var, const char *value, void *cb)
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{
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if (!strcmp(var, "gc.rerereresolved"))
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cutoff_resolve = git_config_int(var, value);
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else if (!strcmp(var, "gc.rerereunresolved"))
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cutoff_noresolve = git_config_int(var, value);
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else
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return git_default_config(var, value, cb);
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return 0;
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}
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static void garbage_collect(struct string_list *rr)
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{
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struct string_list to_remove = { NULL, 0, 0, 1 };
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DIR *dir;
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struct dirent *e;
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int i, cutoff;
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time_t now = time(NULL), then;
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git_config(git_rerere_gc_config, NULL);
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dir = opendir(git_path("rr-cache"));
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if (!dir)
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die_errno("unable to open rr-cache directory");
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while ((e = readdir(dir))) {
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if (is_dot_or_dotdot(e->d_name))
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continue;
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then = rerere_created_at(e->d_name);
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if (!then)
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continue;
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cutoff = (has_rerere_resolution(e->d_name)
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? cutoff_resolve : cutoff_noresolve);
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if (then < now - cutoff * 86400)
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string_list_append(e->d_name, &to_remove);
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}
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for (i = 0; i < to_remove.nr; i++)
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unlink_rr_item(to_remove.items[i].string);
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string_list_clear(&to_remove, 0);
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}
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static int outf(void *dummy, mmbuffer_t *ptr, int nbuf)
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{
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int i;
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for (i = 0; i < nbuf; i++)
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if (write_in_full(1, ptr[i].ptr, ptr[i].size) != ptr[i].size)
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return -1;
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return 0;
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}
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static int diff_two(const char *file1, const char *label1,
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const char *file2, const char *label2)
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{
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xpparam_t xpp;
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xdemitconf_t xecfg;
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xdemitcb_t ecb;
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mmfile_t minus, plus;
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if (read_mmfile(&minus, file1) || read_mmfile(&plus, file2))
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return 1;
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printf("--- a/%s\n+++ b/%s\n", label1, label2);
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fflush(stdout);
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memset(&xpp, 0, sizeof(xpp));
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xpp.flags = XDF_NEED_MINIMAL;
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memset(&xecfg, 0, sizeof(xecfg));
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xecfg.ctxlen = 3;
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ecb.outf = outf;
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xdi_diff(&minus, &plus, &xpp, &xecfg, &ecb);
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free(minus.ptr);
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free(plus.ptr);
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return 0;
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}
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int cmd_rerere(int argc, const char **argv, const char *prefix)
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{
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struct string_list merge_rr = { NULL, 0, 0, 1 };
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int i, fd;
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if (argc < 2)
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return rerere();
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fd = setup_rerere(&merge_rr);
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if (fd < 0)
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return 0;
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if (!strcmp(argv[1], "clear")) {
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for (i = 0; i < merge_rr.nr; i++) {
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const char *name = (const char *)merge_rr.items[i].util;
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if (!has_rerere_resolution(name))
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unlink_rr_item(name);
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}
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unlink_or_warn(git_path("rr-cache/MERGE_RR"));
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} else if (!strcmp(argv[1], "gc"))
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garbage_collect(&merge_rr);
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else if (!strcmp(argv[1], "status"))
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for (i = 0; i < merge_rr.nr; i++)
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printf("%s\n", merge_rr.items[i].string);
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else if (!strcmp(argv[1], "diff"))
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for (i = 0; i < merge_rr.nr; i++) {
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const char *path = merge_rr.items[i].string;
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const char *name = (const char *)merge_rr.items[i].util;
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diff_two(rerere_path(name, "preimage"), path, path, path);
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}
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else
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usage(git_rerere_usage);
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string_list_clear(&merge_rr, 1);
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return 0;
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}
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