| #include "cache.h" |
| #include "config.h" |
| #include "dir.h" |
| #include "tr2_sysenv.h" |
| |
| /* |
| * Each entry represents a trace2 setting. |
| * See Documentation/technical/api-trace2.txt |
| */ |
| struct tr2_sysenv_entry { |
| const char *env_var_name; |
| const char *git_config_name; |
| |
| char *value; |
| unsigned int getenv_called : 1; |
| }; |
| |
| /* |
| * This table must match "enum tr2_sysenv_variable" in tr2_sysenv.h. |
| * |
| * The strings in this table are constant and must match the published |
| * config and environment variable names as described in the documentation. |
| * |
| * We do not define entries for the GIT_TRACE2_PARENT_* environment |
| * variables because they are transient and used to pass information |
| * from parent to child git processes, rather than settings. |
| */ |
| /* clang-format off */ |
| static struct tr2_sysenv_entry tr2_sysenv_settings[] = { |
| [TR2_SYSENV_CFG_PARAM] = { "GIT_TRACE2_CONFIG_PARAMS", |
| "trace2.configparams" }, |
| |
| [TR2_SYSENV_DST_DEBUG] = { "GIT_TRACE2_DST_DEBUG", |
| "trace2.destinationdebug" }, |
| |
| [TR2_SYSENV_NORMAL] = { "GIT_TRACE2", |
| "trace2.normaltarget" }, |
| [TR2_SYSENV_NORMAL_BRIEF] = { "GIT_TRACE2_BRIEF", |
| "trace2.normalbrief" }, |
| |
| [TR2_SYSENV_EVENT] = { "GIT_TRACE2_EVENT", |
| "trace2.eventtarget" }, |
| [TR2_SYSENV_EVENT_BRIEF] = { "GIT_TRACE2_EVENT_BRIEF", |
| "trace2.eventbrief" }, |
| [TR2_SYSENV_EVENT_NESTING] = { "GIT_TRACE2_EVENT_NESTING", |
| "trace2.eventnesting" }, |
| |
| [TR2_SYSENV_PERF] = { "GIT_TRACE2_PERF", |
| "trace2.perftarget" }, |
| [TR2_SYSENV_PERF_BRIEF] = { "GIT_TRACE2_PERF_BRIEF", |
| "trace2.perfbrief" }, |
| |
| [TR2_SYSENV_MAX_FILES] = { "GIT_TRACE2_MAX_FILES", |
| "trace2.maxfiles" }, |
| }; |
| /* clang-format on */ |
| |
| static int tr2_sysenv_cb(const char *key, const char *value, void *d) |
| { |
| int k; |
| |
| if (!starts_with(key, "trace2.")) |
| return 0; |
| |
| for (k = 0; k < ARRAY_SIZE(tr2_sysenv_settings); k++) { |
| if (!strcmp(key, tr2_sysenv_settings[k].git_config_name)) { |
| free(tr2_sysenv_settings[k].value); |
| tr2_sysenv_settings[k].value = xstrdup(value); |
| return 0; |
| } |
| } |
| |
| return 0; |
| } |
| |
| /* |
| * Load Trace2 settings from the system config (usually "/etc/gitconfig" |
| * unless we were built with a runtime-prefix). These are intended to |
| * define the default values for Trace2 as requested by the administrator. |
| * |
| * Then override with the Trace2 settings from the global config. |
| */ |
| void tr2_sysenv_load(void) |
| { |
| if (ARRAY_SIZE(tr2_sysenv_settings) != TR2_SYSENV_MUST_BE_LAST) |
| BUG("tr2_sysenv_settings size is wrong"); |
| |
| read_very_early_config(tr2_sysenv_cb, NULL); |
| } |
| |
| /* |
| * Return the value for the requested Trace2 setting from these sources: |
| * the system config, the global config, and the environment. |
| */ |
| const char *tr2_sysenv_get(enum tr2_sysenv_variable var) |
| { |
| if (var >= TR2_SYSENV_MUST_BE_LAST) |
| BUG("tr2_sysenv_get invalid var '%d'", var); |
| |
| if (!tr2_sysenv_settings[var].getenv_called) { |
| const char *v = getenv(tr2_sysenv_settings[var].env_var_name); |
| if (v && *v) { |
| free(tr2_sysenv_settings[var].value); |
| tr2_sysenv_settings[var].value = xstrdup(v); |
| } |
| tr2_sysenv_settings[var].getenv_called = 1; |
| } |
| |
| return tr2_sysenv_settings[var].value; |
| } |
| |
| /* |
| * Return a friendly name for this setting that is suitable for printing |
| * in an error messages. |
| */ |
| const char *tr2_sysenv_display_name(enum tr2_sysenv_variable var) |
| { |
| if (var >= TR2_SYSENV_MUST_BE_LAST) |
| BUG("tr2_sysenv_get invalid var '%d'", var); |
| |
| return tr2_sysenv_settings[var].env_var_name; |
| } |
| |
| void tr2_sysenv_release(void) |
| { |
| int k; |
| |
| for (k = 0; k < ARRAY_SIZE(tr2_sysenv_settings); k++) |
| free(tr2_sysenv_settings[k].value); |
| } |