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3d3adaad91
Via trace2, Git can already log interesting config parameters (see the trace2_cmd_list_config() function). However, this can grant an incomplete picture because many config parameters also allow overrides via environment variables. To allow for more complete logs, we add a new trace2_cmd_list_env_vars() function and supporting implementation, modeled after the pre-existing config param logging implementation. Signed-off-by: Josh Steadmon <steadmon@google.com> Acked-by: Jeff Hostetler <jeffhost@microsoft.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
148 lines
3.3 KiB
C
148 lines
3.3 KiB
C
#include "cache.h"
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#include "config.h"
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#include "trace2/tr2_cfg.h"
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#include "trace2/tr2_sysenv.h"
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static struct strbuf **tr2_cfg_patterns;
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static int tr2_cfg_count_patterns;
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static int tr2_cfg_loaded;
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static struct strbuf **tr2_cfg_env_vars;
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static int tr2_cfg_env_vars_count;
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static int tr2_cfg_env_vars_loaded;
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/*
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* Parse a string containing a comma-delimited list of config keys
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* or wildcard patterns into a list of strbufs.
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*/
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static int tr2_cfg_load_patterns(void)
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{
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struct strbuf **s;
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const char *envvar;
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if (tr2_cfg_loaded)
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return tr2_cfg_count_patterns;
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tr2_cfg_loaded = 1;
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envvar = tr2_sysenv_get(TR2_SYSENV_CFG_PARAM);
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if (!envvar || !*envvar)
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return tr2_cfg_count_patterns;
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tr2_cfg_patterns = strbuf_split_buf(envvar, strlen(envvar), ',', -1);
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for (s = tr2_cfg_patterns; *s; s++) {
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struct strbuf *buf = *s;
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if (buf->len && buf->buf[buf->len - 1] == ',')
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strbuf_setlen(buf, buf->len - 1);
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strbuf_trim_trailing_newline(*s);
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strbuf_trim(*s);
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}
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tr2_cfg_count_patterns = s - tr2_cfg_patterns;
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return tr2_cfg_count_patterns;
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}
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void tr2_cfg_free_patterns(void)
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{
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if (tr2_cfg_patterns)
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strbuf_list_free(tr2_cfg_patterns);
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tr2_cfg_count_patterns = 0;
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tr2_cfg_loaded = 0;
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}
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/*
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* Parse a string containing a comma-delimited list of environment variable
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* names into a list of strbufs.
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*/
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static int tr2_load_env_vars(void)
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{
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struct strbuf **s;
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const char *varlist;
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if (tr2_cfg_env_vars_loaded)
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return tr2_cfg_env_vars_count;
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tr2_cfg_env_vars_loaded = 1;
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varlist = tr2_sysenv_get(TR2_SYSENV_ENV_VARS);
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if (!varlist || !*varlist)
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return tr2_cfg_env_vars_count;
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tr2_cfg_env_vars = strbuf_split_buf(varlist, strlen(varlist), ',', -1);
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for (s = tr2_cfg_env_vars; *s; s++) {
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struct strbuf *buf = *s;
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if (buf->len && buf->buf[buf->len - 1] == ',')
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strbuf_setlen(buf, buf->len - 1);
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strbuf_trim_trailing_newline(*s);
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strbuf_trim(*s);
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}
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tr2_cfg_env_vars_count = s - tr2_cfg_env_vars;
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return tr2_cfg_env_vars_count;
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}
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void tr2_cfg_free_env_vars(void)
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{
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if (tr2_cfg_env_vars)
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strbuf_list_free(tr2_cfg_env_vars);
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tr2_cfg_env_vars_count = 0;
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tr2_cfg_env_vars_loaded = 0;
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}
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struct tr2_cfg_data {
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const char *file;
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int line;
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};
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/*
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* See if the given config key matches any of our patterns of interest.
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*/
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static int tr2_cfg_cb(const char *key, const char *value, void *d)
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{
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struct strbuf **s;
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struct tr2_cfg_data *data = (struct tr2_cfg_data *)d;
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for (s = tr2_cfg_patterns; *s; s++) {
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struct strbuf *buf = *s;
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int wm = wildmatch(buf->buf, key, WM_CASEFOLD);
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if (wm == WM_MATCH) {
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trace2_def_param_fl(data->file, data->line, key, value);
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return 0;
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}
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}
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return 0;
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}
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void tr2_cfg_list_config_fl(const char *file, int line)
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{
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struct tr2_cfg_data data = { file, line };
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if (tr2_cfg_load_patterns() > 0)
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read_early_config(tr2_cfg_cb, &data);
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}
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void tr2_list_env_vars_fl(const char *file, int line)
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{
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struct strbuf **s;
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if (tr2_load_env_vars() <= 0)
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return;
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for (s = tr2_cfg_env_vars; *s; s++) {
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struct strbuf *buf = *s;
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const char *val = getenv(buf->buf);
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if (val && *val)
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trace2_def_param_fl(file, line, buf->buf, val);
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}
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}
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void tr2_cfg_set_fl(const char *file, int line, const char *key,
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const char *value)
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{
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struct tr2_cfg_data data = { file, line };
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if (tr2_cfg_load_patterns() > 0)
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tr2_cfg_cb(key, value, &data);
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}
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