trace2: use system/global config for default trace2 settings
[git/git.git] / trace2 / tr2_cfg.c
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1#include "cache.h"
2#include "config.h"
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3#include "trace2/tr2_cfg.h"
4#include "trace2/tr2_sysenv.h"
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5
6static struct strbuf **tr2_cfg_patterns;
7static int tr2_cfg_count_patterns;
8static int tr2_cfg_loaded;
9
10/*
11 * Parse a string containing a comma-delimited list of config keys
12 * or wildcard patterns into a list of strbufs.
13 */
14static int tr2_cfg_load_patterns(void)
15{
16 struct strbuf **s;
17 const char *envvar;
18
19 if (tr2_cfg_loaded)
20 return tr2_cfg_count_patterns;
21 tr2_cfg_loaded = 1;
22
bce9db6d 23 envvar = tr2_sysenv_get(TR2_SYSENV_CFG_PARAM);
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24 if (!envvar || !*envvar)
25 return tr2_cfg_count_patterns;
26
27 tr2_cfg_patterns = strbuf_split_buf(envvar, strlen(envvar), ',', -1);
28 for (s = tr2_cfg_patterns; *s; s++) {
29 struct strbuf *buf = *s;
30
31 if (buf->len && buf->buf[buf->len - 1] == ',')
32 strbuf_setlen(buf, buf->len - 1);
33 strbuf_trim_trailing_newline(*s);
34 strbuf_trim(*s);
35 }
36
37 tr2_cfg_count_patterns = s - tr2_cfg_patterns;
38 return tr2_cfg_count_patterns;
39}
40
41void tr2_cfg_free_patterns(void)
42{
43 if (tr2_cfg_patterns)
44 strbuf_list_free(tr2_cfg_patterns);
45 tr2_cfg_count_patterns = 0;
46 tr2_cfg_loaded = 0;
47}
48
49struct tr2_cfg_data {
50 const char *file;
51 int line;
52};
53
54/*
55 * See if the given config key matches any of our patterns of interest.
56 */
57static int tr2_cfg_cb(const char *key, const char *value, void *d)
58{
59 struct strbuf **s;
60 struct tr2_cfg_data *data = (struct tr2_cfg_data *)d;
61
62 for (s = tr2_cfg_patterns; *s; s++) {
63 struct strbuf *buf = *s;
64 int wm = wildmatch(buf->buf, key, WM_CASEFOLD);
65 if (wm == WM_MATCH) {
66 trace2_def_param_fl(data->file, data->line, key, value);
67 return 0;
68 }
69 }
70
71 return 0;
72}
73
74void tr2_cfg_list_config_fl(const char *file, int line)
75{
76 struct tr2_cfg_data data = { file, line };
77
78 if (tr2_cfg_load_patterns() > 0)
79 read_early_config(tr2_cfg_cb, &data);
80}
81
82void tr2_cfg_set_fl(const char *file, int line, const char *key,
83 const char *value)
84{
85 struct tr2_cfg_data data = { file, line };
86
87 if (tr2_cfg_load_patterns() > 0)
88 tr2_cfg_cb(key, value, &data);
89}