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4b8dd424d8
This should have been part of 783a86c142 (config: mark unused callback
parameters, 2022-08-19), but was missed in that commit.
Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
134 lines
3.7 KiB
C
134 lines
3.7 KiB
C
#include "git-compat-util.h"
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#include "config.h"
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#include "dir.h"
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#include "tr2_sysenv.h"
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/*
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* Each entry represents a trace2 setting.
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* See Documentation/technical/api-trace2.txt
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*/
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struct tr2_sysenv_entry {
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const char *env_var_name;
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const char *git_config_name;
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char *value;
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unsigned int getenv_called : 1;
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};
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/*
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* This table must match "enum tr2_sysenv_variable" in tr2_sysenv.h.
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*
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* The strings in this table are constant and must match the published
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* config and environment variable names as described in the documentation.
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*
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* We do not define entries for the GIT_TRACE2_PARENT_* environment
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* variables because they are transient and used to pass information
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* from parent to child git processes, rather than settings.
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*/
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/* clang-format off */
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static struct tr2_sysenv_entry tr2_sysenv_settings[] = {
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[TR2_SYSENV_CFG_PARAM] = { "GIT_TRACE2_CONFIG_PARAMS",
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"trace2.configparams" },
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[TR2_SYSENV_ENV_VARS] = { "GIT_TRACE2_ENV_VARS",
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"trace2.envvars" },
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[TR2_SYSENV_DST_DEBUG] = { "GIT_TRACE2_DST_DEBUG",
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"trace2.destinationdebug" },
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[TR2_SYSENV_NORMAL] = { "GIT_TRACE2",
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"trace2.normaltarget" },
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[TR2_SYSENV_NORMAL_BRIEF] = { "GIT_TRACE2_BRIEF",
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"trace2.normalbrief" },
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[TR2_SYSENV_EVENT] = { "GIT_TRACE2_EVENT",
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"trace2.eventtarget" },
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[TR2_SYSENV_EVENT_BRIEF] = { "GIT_TRACE2_EVENT_BRIEF",
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"trace2.eventbrief" },
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[TR2_SYSENV_EVENT_NESTING] = { "GIT_TRACE2_EVENT_NESTING",
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"trace2.eventnesting" },
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[TR2_SYSENV_PERF] = { "GIT_TRACE2_PERF",
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"trace2.perftarget" },
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[TR2_SYSENV_PERF_BRIEF] = { "GIT_TRACE2_PERF_BRIEF",
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"trace2.perfbrief" },
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[TR2_SYSENV_MAX_FILES] = { "GIT_TRACE2_MAX_FILES",
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"trace2.maxfiles" },
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};
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/* clang-format on */
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static int tr2_sysenv_cb(const char *key, const char *value,
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const struct config_context *ctx UNUSED,
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void *d UNUSED)
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{
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int k;
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if (!starts_with(key, "trace2."))
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return 0;
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for (k = 0; k < ARRAY_SIZE(tr2_sysenv_settings); k++) {
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if (!strcmp(key, tr2_sysenv_settings[k].git_config_name)) {
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free(tr2_sysenv_settings[k].value);
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tr2_sysenv_settings[k].value = xstrdup(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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/*
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* Load Trace2 settings from the system config (usually "/etc/gitconfig"
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* unless we were built with a runtime-prefix). These are intended to
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* define the default values for Trace2 as requested by the administrator.
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*
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* Then override with the Trace2 settings from the global config.
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*/
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void tr2_sysenv_load(void)
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{
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if (ARRAY_SIZE(tr2_sysenv_settings) != TR2_SYSENV_MUST_BE_LAST)
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BUG("tr2_sysenv_settings size is wrong");
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read_very_early_config(tr2_sysenv_cb, NULL);
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}
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/*
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* Return the value for the requested Trace2 setting from these sources:
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* the system config, the global config, and the environment.
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*/
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const char *tr2_sysenv_get(enum tr2_sysenv_variable var)
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{
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if (var >= TR2_SYSENV_MUST_BE_LAST)
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BUG("tr2_sysenv_get invalid var '%d'", var);
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if (!tr2_sysenv_settings[var].getenv_called) {
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const char *v = getenv(tr2_sysenv_settings[var].env_var_name);
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if (v && *v) {
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free(tr2_sysenv_settings[var].value);
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tr2_sysenv_settings[var].value = xstrdup(v);
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}
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tr2_sysenv_settings[var].getenv_called = 1;
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}
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return tr2_sysenv_settings[var].value;
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}
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/*
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* Return a friendly name for this setting that is suitable for printing
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* in an error messages.
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*/
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const char *tr2_sysenv_display_name(enum tr2_sysenv_variable var)
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{
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if (var >= TR2_SYSENV_MUST_BE_LAST)
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BUG("tr2_sysenv_get invalid var '%d'", var);
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return tr2_sysenv_settings[var].env_var_name;
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}
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void tr2_sysenv_release(void)
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{
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int k;
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for (k = 0; k < ARRAY_SIZE(tr2_sysenv_settings); k++)
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free(tr2_sysenv_settings[k].value);
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}
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