There is one slight behavior change, previously "merge.default"
silently ignored a NULL value and didn't raise any error. But,
in the same function, all other values raise an error on a NULL
value. So to conform with other call sites in Git, a NULL value
for "merge.default" raises an error.

Signed-off-by: Tanay Abhra <tanay...@gmail.com>
---
We cannot easily use the new config-set API here, because
much of the function is dedicated to processing
"merge.<name>.variable" which does not easily translate to
the new API. If it were for variables like,
"merge.summary", "merge.tool", and "merge.verbosity", we
could use the new API.

 ll-merge.c | 23 ++++++-----------------
 1 file changed, 6 insertions(+), 17 deletions(-)

diff --git a/ll-merge.c b/ll-merge.c
index fb61ea6..8ea03e5 100644
--- a/ll-merge.c
+++ b/ll-merge.c
@@ -225,11 +225,8 @@ static int read_merge_config(const char *var, const char 
*value, void *cb)
        const char *key, *name;
        int namelen;

-       if (!strcmp(var, "merge.default")) {
-               if (value)
-                       default_ll_merge = xstrdup(value);
-               return 0;
-       }
+       if (!strcmp(var, "merge.default"))
+               return git_config_string(&default_ll_merge, var, value);

        /*
         * We are not interested in anything but "merge.<name>.variable";
@@ -254,12 +251,8 @@ static int read_merge_config(const char *var, const char 
*value, void *cb)
                ll_user_merge_tail = &(fn->next);
        }

-       if (!strcmp("name", key)) {
-               if (!value)
-                       return error("%s: lacks value", var);
-               fn->description = xstrdup(value);
-               return 0;
-       }
+       if (!strcmp("name", key))
+               return git_config_string(&fn->description, var, value);

        if (!strcmp("driver", key)) {
                if (!value)
@@ -285,12 +278,8 @@ static int read_merge_config(const char *var, const char 
*value, void *cb)
                return 0;
        }

-       if (!strcmp("recursive", key)) {
-               if (!value)
-                       return error("%s: lacks value", var);
-               fn->recursive = xstrdup(value);
-               return 0;
-       }
+       if (!strcmp("recursive", key))
+               return git_config_string(&fn->recursive, var, value);

        return 0;
 }
-- 
1.9.0.GIT


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