[PATCH v4 2/3] format-patch: use enum variables

[Denton Liu]

Before, `thread` and `config_cover_letter` were defined as ints even
though they behaved as enums. Define actual enums and change these
variables to use these new definitions.

Signed-off-by: Denton Liu <liu.den...@gmail.com>
---
 builtin/log.c | 30 +++++++++++++++++-------------
 1 file changed, 17 insertions(+), 13 deletions(-)

diff --git a/builtin/log.c b/builtin/log.c
index 7d658cecef..f06f5d586b 100644
--- a/builtin/log.c
+++ b/builtin/log.c
@@ -764,24 +764,28 @@ static void add_header(const char *value)
        item->string[len] = '\0';
 }
 
-#define THREAD_SHALLOW 1
-#define THREAD_DEEP 2
-static int thread;
+enum cover_setting {
+       COVER_UNSET,
+       COVER_OFF,
+       COVER_ON,
+       COVER_AUTO
+};
+
+enum thread_level {
+       THREAD_UNSET,
+       THREAD_SHALLOW,
+       THREAD_DEEP
+};
+
+static enum thread_level thread;
 static int do_signoff;
 static int base_auto;
 static char *from;
 static const char *signature = git_version_string;
 static const char *signature_file;
-static int config_cover_letter;
+static enum cover_setting config_cover_letter;
 static const char *config_output_directory;
 
-enum {
-       COVER_UNSET,
-       COVER_OFF,
-       COVER_ON,
-       COVER_AUTO
-};
-
 static int git_format_config(const char *var, const char *value, void *cb)
 {
        struct rev_info *rev = cb;
@@ -1248,9 +1252,9 @@ static int output_directory_callback(const struct option 
*opt, const char *arg,
 
 static int thread_callback(const struct option *opt, const char *arg, int 
unset)
 {
-       int *thread = (int *)opt->value;
+       enum thread_level *thread = (enum thread_level *)opt->value;
        if (unset)
-               *thread = 0;
+               *thread = THREAD_UNSET;
        else if (!arg || !strcmp(arg, "shallow"))
                *thread = THREAD_SHALLOW;
        else if (!strcmp(arg, "deep"))
-- 
2.23.0.17.g7cce04acd6.dirty