trace2/tr2_cfg.c

   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
   7 static struct strbuf **tr2_cfg_patterns;
   8 static int tr2_cfg_count_patterns;
   9 static 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  */
  15 static 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
  42 void 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
  50 struct 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  */
  58 static 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
  75 void 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
  83 void 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 }