From c62a999c6e595692ee3bd8ff1e9435491872a79c Mon Sep 17 00:00:00 2001 From: Patrick Steinhardt Date: Mon, 19 Apr 2021 14:31:08 +0200 Subject: config: rename `git_etc_config()` The `git_etc_gitconfig()` function retrieves the system-level path of the configuration file. We're about to introduce a way to override it via an environment variable, at which point the name of this function would start to become misleading. Rename the function to `git_system_config()` as a preparatory step. While at it, the function is also refactored to pass memory ownership to the caller. This is done to better match semantics of `git_global_config()`, which is going to be introduced in the next commit. Signed-off-by: Patrick Steinhardt Signed-off-by: Junio C Hamano --- config.c | 18 ++++++++---------- 1 file changed, 8 insertions(+), 10 deletions(-) (limited to 'config.c') diff --git a/config.c b/config.c index 6428393a41..3199b1b30c 100644 --- a/config.c +++ b/config.c @@ -1844,12 +1844,9 @@ static int git_config_from_blob_ref(config_fn_t fn, return git_config_from_blob_oid(fn, name, &oid, data); } -const char *git_etc_gitconfig(void) +char *git_system_config(void) { - static const char *system_wide; - if (!system_wide) - system_wide = system_path(ETC_GITCONFIG); - return system_wide; + return system_path(ETC_GITCONFIG); } /* @@ -1883,6 +1880,7 @@ static int do_git_config_sequence(const struct config_options *opts, config_fn_t fn, void *data) { int ret = 0; + char *system_config = git_system_config(); char *xdg_config = xdg_config_home("config"); char *user_config = expand_user_path("~/.gitconfig", 0); char *repo_config; @@ -1896,11 +1894,10 @@ static int do_git_config_sequence(const struct config_options *opts, repo_config = NULL; current_parsing_scope = CONFIG_SCOPE_SYSTEM; - if (git_config_system() && !access_or_die(git_etc_gitconfig(), R_OK, - opts->system_gently ? - ACCESS_EACCES_OK : 0)) - ret += git_config_from_file(fn, git_etc_gitconfig(), - data); + if (git_config_system() && system_config && + !access_or_die(system_config, R_OK, + opts->system_gently ? ACCESS_EACCES_OK : 0)) + ret += git_config_from_file(fn, system_config, data); current_parsing_scope = CONFIG_SCOPE_GLOBAL; if (xdg_config && !access_or_die(xdg_config, R_OK, ACCESS_EACCES_OK)) @@ -1927,6 +1924,7 @@ static int do_git_config_sequence(const struct config_options *opts, die(_("unable to parse command-line config")); current_parsing_scope = prev_parsing_scope; + free(system_config); free(xdg_config); free(user_config); free(repo_config); -- cgit v1.2.3 From 1e06eb9b5dc9c663c2a60a2ca63e218b41a765e8 Mon Sep 17 00:00:00 2001 From: Patrick Steinhardt Date: Mon, 19 Apr 2021 14:31:12 +0200 Subject: config: unify code paths to get global config paths There's two callsites which assemble global config paths, once in the config loading code and once in the git-config(1) builtin. We're about to implement a way to override global config paths via an environment variable which would require us to adjust both sites. Unify both code paths into a single `git_global_config()` function which returns both paths for `~/.gitconfig` and the XDG config file. This will make the subsequent patch which introduces the new envvar easier to implement. No functional changes are expected from this patch. Signed-off-by: Patrick Steinhardt Signed-off-by: Junio C Hamano --- config.c | 12 ++++++++++-- 1 file changed, 10 insertions(+), 2 deletions(-) (limited to 'config.c') diff --git a/config.c b/config.c index 3199b1b30c..8900d96cb6 100644 --- a/config.c +++ b/config.c @@ -1849,6 +1849,12 @@ char *git_system_config(void) return system_path(ETC_GITCONFIG); } +void git_global_config(char **user_config, char **xdg_config) +{ + *user_config = expand_user_path("~/.gitconfig", 0); + *xdg_config = xdg_config_home("config"); +} + /* * Parse environment variable 'k' as a boolean (in various * possible spellings); if missing, use the default value 'def'. @@ -1881,8 +1887,8 @@ static int do_git_config_sequence(const struct config_options *opts, { int ret = 0; char *system_config = git_system_config(); - char *xdg_config = xdg_config_home("config"); - char *user_config = expand_user_path("~/.gitconfig", 0); + char *xdg_config = NULL; + char *user_config = NULL; char *repo_config; enum config_scope prev_parsing_scope = current_parsing_scope; @@ -1900,6 +1906,8 @@ static int do_git_config_sequence(const struct config_options *opts, ret += git_config_from_file(fn, system_config, data); current_parsing_scope = CONFIG_SCOPE_GLOBAL; + git_global_config(&user_config, &xdg_config); + if (xdg_config && !access_or_die(xdg_config, R_OK, ACCESS_EACCES_OK)) ret += git_config_from_file(fn, xdg_config, data); -- cgit v1.2.3 From 4179b4897f2de28858acaebd6382c06c91532e98 Mon Sep 17 00:00:00 2001 From: Patrick Steinhardt Date: Mon, 19 Apr 2021 14:31:16 +0200 Subject: config: allow overriding of global and system configuration In order to have git run in a fully controlled environment without any misconfiguration, it may be desirable for users or scripts to override global- and system-level configuration files. We already have a way of doing this, which is to unset both HOME and XDG_CONFIG_HOME environment variables and to set `GIT_CONFIG_NOGLOBAL=true`. This is quite kludgy, and unsetting the first two variables likely has an impact on other executables spawned by such a script. The obvious way to fix this would be to introduce `GIT_CONFIG_NOGLOBAL` as an equivalent to `GIT_CONFIG_NOSYSTEM`. But in the past, it has turned out that this design is inflexible: we cannot test system-level parsing of the git configuration in our test harness because there is no way to change its location, so all tests run with `GIT_CONFIG_NOSYSTEM` set. Instead of doing the same mistake with `GIT_CONFIG_NOGLOBAL`, introduce two new variables `GIT_CONFIG_GLOBAL` and `GIT_CONFIG_SYSTEM`: - If unset, git continues to use the usual locations. - If set to a specific path, we skip reading the normal configuration files and instead take the path. By setting the path to `/dev/null`, no configuration will be loaded for the respective level. This implements the usecase where we want to execute code in a sanitized environment without any potential misconfigurations via `/dev/null`, but is more flexible and allows for more usecases than simply adding `GIT_CONFIG_NOGLOBAL`. Signed-off-by: Patrick Steinhardt Signed-off-by: Junio C Hamano --- config.c | 17 ++++++++++++++--- 1 file changed, 14 insertions(+), 3 deletions(-) (limited to 'config.c') diff --git a/config.c b/config.c index 8900d96cb6..8d4dbe1310 100644 --- a/config.c +++ b/config.c @@ -1846,13 +1846,24 @@ static int git_config_from_blob_ref(config_fn_t fn, char *git_system_config(void) { + char *system_config = xstrdup_or_null(getenv("GIT_CONFIG_SYSTEM")); + if (system_config) + return system_config; return system_path(ETC_GITCONFIG); } -void git_global_config(char **user_config, char **xdg_config) +void git_global_config(char **user_out, char **xdg_out) { - *user_config = expand_user_path("~/.gitconfig", 0); - *xdg_config = xdg_config_home("config"); + char *user_config = xstrdup_or_null(getenv("GIT_CONFIG_GLOBAL")); + char *xdg_config = NULL; + + if (!user_config) { + user_config = expand_user_path("~/.gitconfig", 0); + xdg_config = xdg_config_home("config"); + } + + *user_out = user_config; + *xdg_out = xdg_config; } /* -- cgit v1.2.3