config: convert multi_replace to flags

We will extend the flexibility of the config API. Before doing so, let's
take an existing 'int multi_replace' parameter and replace it with a new
'unsigned flags' parameter that can take multiple options as a bit field.

Update all callers that specified multi_replace to now specify the
CONFIG_FLAGS_MULTI_REPLACE flag. To add more clarity, extend the
documentation of git_config_set_multivar_in_file() including a clear
labeling of its arguments. Other config API methods in config.h require
only a change of the final parameter from 'int' to 'unsigned'.

Signed-off-by: Derrick Stolee <dstolee@microsoft.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

1 files changed, 22 insertions, 7 deletions

diff --git a/config.h b/config.h
index 91cdfbf..84fdf22 100644
--- a/config.h
+++ b/config.h
@@ -256,9 +256,22 @@ void git_config_set(const char *, const char *);
 
 int git_config_parse_key(const char *, char **, size_t *);
 int git_config_key_is_valid(const char *key);
-int git_config_set_multivar_gently(const char *, const char *, const char *, int);
-void git_config_set_multivar(const char *, const char *, const char *, int);
-int git_config_set_multivar_in_file_gently(const char *, const char *, const char *, const char *, int);
+
+/*
+ * The following macros specify flag bits that alter the behavior
+ * of the git_config_set_multivar*() methods.
+ */
+
+/*
+ * When CONFIG_FLAGS_MULTI_REPLACE is specified, all matching key/values
+ * are removed before a single new pair is written. If the flag is not
+ * present, then set operations replace only the first match.
+ */
+#define CONFIG_FLAGS_MULTI_REPLACE (1 << 0)
+
+int git_config_set_multivar_gently(const char *, const char *, const char *, unsigned);
+void git_config_set_multivar(const char *, const char *, const char *, unsigned);
+int git_config_set_multivar_in_file_gently(const char *, const char *, const char *, const char *, unsigned);
 
 /**
  * takes four parameters:
@@ -276,13 +289,15 @@ int git_config_set_multivar_in_file_gently(const char *, const char *, const cha
  * - the value regex, as a string. It will disregard key/value pairs where value
  *   does not match.
  *
- * - a multi_replace value, as an int. If value is equal to zero, nothing or only
- *   one matching key/value is replaced, else all matching key/values (regardless
- *   how many) are removed, before the new pair is written.
+ * - a flags value with bits corresponding to the CONFIG_FLAG_* macros.
  *
  * It returns 0 on success.
  */
-void git_config_set_multivar_in_file(const char *, const char *, const char *, const char *, int);
+void git_config_set_multivar_in_file(const char *config_filename,
+				     const char *key,
+				     const char *value,
+				     const char *value_regex,
+				     unsigned flags);
 
 /**
  * rename or remove sections in the config file