gitweb: use new Git::Repo API, and add optional caching
[git/gitweb-caching.git] / builtin-rerere.c
blobdd4573fe8dcd9dc8edd5a7d41bc8daa83034ee7e
1 #include "builtin.h"
2 #include "cache.h"
3 #include "string-list.h"
4 #include "rerere.h"
5 #include "xdiff/xdiff.h"
6 #include "xdiff-interface.h"
8 static const char git_rerere_usage[] =
9 "git rerere [clear | status | diff | gc]";
11 /* these values are days */
12 static int cutoff_noresolve = 15;
13 static int cutoff_resolve = 60;
15 static const char *rr_path(const char *name, const char *file)
17 return git_path("rr-cache/%s/%s", name, file);
20 static time_t rerere_created_at(const char *name)
22 struct stat st;
23 return stat(rr_path(name, "preimage"), &st) ? (time_t) 0 : st.st_mtime;
26 static int has_resolution(const char *name)
28 struct stat st;
29 return !stat(rr_path(name, "postimage"), &st);
32 static void unlink_rr_item(const char *name)
34 unlink(rr_path(name, "thisimage"));
35 unlink(rr_path(name, "preimage"));
36 unlink(rr_path(name, "postimage"));
37 rmdir(git_path("rr-cache/%s", name));
40 static int git_rerere_gc_config(const char *var, const char *value, void *cb)
42 if (!strcmp(var, "gc.rerereresolved"))
43 cutoff_resolve = git_config_int(var, value);
44 else if (!strcmp(var, "gc.rerereunresolved"))
45 cutoff_noresolve = git_config_int(var, value);
46 else
47 return git_default_config(var, value, cb);
48 return 0;
51 static void garbage_collect(struct string_list *rr)
53 struct string_list to_remove = { NULL, 0, 0, 1 };
54 DIR *dir;
55 struct dirent *e;
56 int i, cutoff;
57 time_t now = time(NULL), then;
59 git_config(git_rerere_gc_config, NULL);
60 dir = opendir(git_path("rr-cache"));
61 while ((e = readdir(dir))) {
62 const char *name = e->d_name;
63 if (name[0] == '.' &&
64 (name[1] == '\0' || (name[1] == '.' && name[2] == '\0')))
65 continue;
66 then = rerere_created_at(name);
67 if (!then)
68 continue;
69 cutoff = (has_resolution(name)
70 ? cutoff_resolve : cutoff_noresolve);
71 if (then < now - cutoff * 86400)
72 string_list_append(name, &to_remove);
74 for (i = 0; i < to_remove.nr; i++)
75 unlink_rr_item(to_remove.items[i].string);
76 string_list_clear(&to_remove, 0);
79 static int outf(void *dummy, mmbuffer_t *ptr, int nbuf)
81 int i;
82 for (i = 0; i < nbuf; i++)
83 if (write_in_full(1, ptr[i].ptr, ptr[i].size) != ptr[i].size)
84 return -1;
85 return 0;
88 static int diff_two(const char *file1, const char *label1,
89 const char *file2, const char *label2)
91 xpparam_t xpp;
92 xdemitconf_t xecfg;
93 xdemitcb_t ecb;
94 mmfile_t minus, plus;
96 if (read_mmfile(&minus, file1) || read_mmfile(&plus, file2))
97 return 1;
99 printf("--- a/%s\n+++ b/%s\n", label1, label2);
100 fflush(stdout);
101 xpp.flags = XDF_NEED_MINIMAL;
102 memset(&xecfg, 0, sizeof(xecfg));
103 xecfg.ctxlen = 3;
104 ecb.outf = outf;
105 xdi_diff(&minus, &plus, &xpp, &xecfg, &ecb);
107 free(minus.ptr);
108 free(plus.ptr);
109 return 0;
112 int cmd_rerere(int argc, const char **argv, const char *prefix)
114 struct string_list merge_rr = { NULL, 0, 0, 1 };
115 int i, fd;
117 if (argc < 2)
118 return rerere();
120 fd = setup_rerere(&merge_rr);
121 if (fd < 0)
122 return 0;
124 if (!strcmp(argv[1], "clear")) {
125 for (i = 0; i < merge_rr.nr; i++) {
126 const char *name = (const char *)merge_rr.items[i].util;
127 if (!has_resolution(name))
128 unlink_rr_item(name);
130 unlink(git_path("rr-cache/MERGE_RR"));
131 } else if (!strcmp(argv[1], "gc"))
132 garbage_collect(&merge_rr);
133 else if (!strcmp(argv[1], "status"))
134 for (i = 0; i < merge_rr.nr; i++)
135 printf("%s\n", merge_rr.items[i].string);
136 else if (!strcmp(argv[1], "diff"))
137 for (i = 0; i < merge_rr.nr; i++) {
138 const char *path = merge_rr.items[i].string;
139 const char *name = (const char *)merge_rr.items[i].util;
140 diff_two(rr_path(name, "preimage"), path, path, path);
142 else
143 usage(git_rerere_usage);
145 string_list_clear(&merge_rr, 1);
146 return 0;