trace2: create new combined trace facility
[git/git.git] / trace2 / tr2_cfg.c
CommitLineData
ee4512ed
JH
1#include "cache.h"
2#include "config.h"
3#include "tr2_cfg.h"
4
5#define TR2_ENVVAR_CFG_PARAM "GIT_TR2_CONFIG_PARAMS"
6
7static struct strbuf **tr2_cfg_patterns;
8static int tr2_cfg_count_patterns;
9static int tr2_cfg_loaded;
10
11/*
12 * Parse a string containing a comma-delimited list of config keys
13 * or wildcard patterns into a list of strbufs.
14 */
15static int tr2_cfg_load_patterns(void)
16{
17 struct strbuf **s;
18 const char *envvar;
19
20 if (tr2_cfg_loaded)
21 return tr2_cfg_count_patterns;
22 tr2_cfg_loaded = 1;
23
24 envvar = getenv(TR2_ENVVAR_CFG_PARAM);
25 if (!envvar || !*envvar)
26 return tr2_cfg_count_patterns;
27
28 tr2_cfg_patterns = strbuf_split_buf(envvar, strlen(envvar), ',', -1);
29 for (s = tr2_cfg_patterns; *s; s++) {
30 struct strbuf *buf = *s;
31
32 if (buf->len && buf->buf[buf->len - 1] == ',')
33 strbuf_setlen(buf, buf->len - 1);
34 strbuf_trim_trailing_newline(*s);
35 strbuf_trim(*s);
36 }
37
38 tr2_cfg_count_patterns = s - tr2_cfg_patterns;
39 return tr2_cfg_count_patterns;
40}
41
42void tr2_cfg_free_patterns(void)
43{
44 if (tr2_cfg_patterns)
45 strbuf_list_free(tr2_cfg_patterns);
46 tr2_cfg_count_patterns = 0;
47 tr2_cfg_loaded = 0;
48}
49
50struct tr2_cfg_data {
51 const char *file;
52 int line;
53};
54
55/*
56 * See if the given config key matches any of our patterns of interest.
57 */
58static int tr2_cfg_cb(const char *key, const char *value, void *d)
59{
60 struct strbuf **s;
61 struct tr2_cfg_data *data = (struct tr2_cfg_data *)d;
62
63 for (s = tr2_cfg_patterns; *s; s++) {
64 struct strbuf *buf = *s;
65 int wm = wildmatch(buf->buf, key, WM_CASEFOLD);
66 if (wm == WM_MATCH) {
67 trace2_def_param_fl(data->file, data->line, key, value);
68 return 0;
69 }
70 }
71
72 return 0;
73}
74
75void tr2_cfg_list_config_fl(const char *file, int line)
76{
77 struct tr2_cfg_data data = { file, line };
78
79 if (tr2_cfg_load_patterns() > 0)
80 read_early_config(tr2_cfg_cb, &data);
81}
82
83void tr2_cfg_set_fl(const char *file, int line, const char *key,
84 const char *value)
85{
86 struct tr2_cfg_data data = { file, line };
87
88 if (tr2_cfg_load_patterns() > 0)
89 tr2_cfg_cb(key, value, &data);
90}