A lot of call-sites for the existing family of `git_config_set`
functions do not check for errors that may occur, e.g. the
configuration file being locked. In many cases we simply want to
die when such a situation arises.

Introduce wrappers that will cause the program to die in those
cases.

Signed-off-by: Patrick Steinhardt <p...@pks.im>
---
 cache.h  |  4 ++++
 config.c | 27 +++++++++++++++++++++++++++
 2 files changed, 31 insertions(+)

diff --git a/cache.h b/cache.h
index dfc459c..c1f844d 100644
--- a/cache.h
+++ b/cache.h
@@ -1508,11 +1508,15 @@ extern int git_config_maybe_bool(const char *, const 
char *);
 extern int git_config_string(const char **, const char *, const char *);
 extern int git_config_pathname(const char **, const char *, const char *);
 extern int git_config_set_in_file(const char *, const char *, const char *);
+extern void git_config_set_in_file_or_die(const char *, const char *, const 
char *);
 extern int git_config_set(const char *, const char *);
+extern void git_config_set_or_die(const char *, const char *);
 extern int git_config_parse_key(const char *, char **, int *);
 extern int git_config_key_is_valid(const char *key);
 extern int git_config_set_multivar(const char *, const char *, const char *, 
int);
+extern void git_config_set_multivar_or_die(const char *, const char *, const 
char *, int);
 extern int git_config_set_multivar_in_file(const char *, const char *, const 
char *, const char *, int);
+extern void git_config_set_multivar_in_file_or_die(const char *, const char *, 
const char *, const char *, int);
 extern int git_config_rename_section(const char *, const char *);
 extern int git_config_rename_section_in_file(const char *, const char *, const 
char *);
 extern const char *git_etc_gitconfig(void);
diff --git a/config.c b/config.c
index 86a5eb2..856f7d34 100644
--- a/config.c
+++ b/config.c
@@ -1831,11 +1831,22 @@ int git_config_set_in_file(const char *config_filename,
        return git_config_set_multivar_in_file(config_filename, key, value, 
NULL, 0);
 }
 
+void git_config_set_in_file_or_die(const char *config_filename,
+                       const char *key, const char *value)
+{
+       git_config_set_multivar_in_file_or_die(config_filename, key, value, 
NULL, 0);
+}
+
 int git_config_set(const char *key, const char *value)
 {
        return git_config_set_multivar(key, value, NULL, 0);
 }
 
+void git_config_set_or_die(const char *key, const char *value)
+{
+       git_config_set_multivar_or_die(key, value, NULL, 0);
+}
+
 /*
  * Auxiliary function to sanity-check and split the key into the section
  * identifier and variable name.
@@ -2179,6 +2190,15 @@ write_err_out:
 
 }
 
+void git_config_set_multivar_in_file_or_die(const char *config_filename,
+                               const char *key, const char *value,
+                               const char *value_regex, int multi_replace)
+{
+       if (git_config_set_multivar_in_file(config_filename, key, value,
+                                           value_regex, multi_replace) < 0)
+               die(_("Could not set '%s' to '%s'"), key, value);
+}
+
 int git_config_set_multivar(const char *key, const char *value,
                        const char *value_regex, int multi_replace)
 {
@@ -2186,6 +2206,13 @@ int git_config_set_multivar(const char *key, const char 
*value,
                                               multi_replace);
 }
 
+void git_config_set_multivar_or_die(const char *key, const char *value,
+                       const char *value_regex, int multi_replace)
+{
+       git_config_set_multivar_in_file_or_die(NULL, key, value, value_regex,
+                                              multi_replace);
+}
+
 static int section_name_match (const char *buf, const char *name)
 {
        int i = 0, j = 0, dot = 0;
-- 
2.7.0

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