[PATCH v3 3/6] imap-send.c: replace `git_config()` with `git_config_get_*()` family

[Tanay Abhra <tanayabh@gmail.com>]

Use `git_config_get_*()` family instead of `git_config()` to take advantage of
the config-set API which provides a cleaner control flow.
The function now raises an error instead of dying in cases where a NULL value is
not allowed.

Signed-off-by: Tanay Abhra <tanayabh@gmail.com>
---
 imap-send.c | 62 +++++++++++++++++++++++++++----------------------------------
 1 file changed, 27 insertions(+), 35 deletions(-)

diff --git a/imap-send.c b/imap-send.c
index 524fbab..b7ec98a 100644
--- a/imap-send.c
+++ b/imap-send.c
@@ -1326,43 +1326,35 @@ static int split_msg(struct strbuf *all_msgs, struct strbuf *msg, int *ofs)
 
 static char *imap_folder;
 
-static int git_imap_config(const char *key, const char *val, void *cb)
+static void git_imap_config(void)
 {
-	if (!skip_prefix(key, "imap.", &key))
-		return 0;
-
-	/* check booleans first, and barf on others */
-	if (!strcmp("sslverify", key))
-		server.ssl_verify = git_config_bool(key, val);
-	else if (!strcmp("preformattedhtml", key))
-		server.use_html = git_config_bool(key, val);
-	else if (!val)
-		return config_error_nonbool(key);
-
-	if (!strcmp("folder", key)) {
-		imap_folder = xstrdup(val);
-	} else if (!strcmp("host", key)) {
-		if (starts_with(val, "imap:"))
-			val += 5;
-		else if (starts_with(val, "imaps:")) {
-			val += 6;
-			server.use_ssl = 1;
+	const char *val = NULL;
+
+	git_config_get_bool("imap.sslverify", &server.ssl_verify);
+	git_config_get_bool("imap.preformattedhtml", &server.use_html);
+	git_config_get_string("imap.folder", (const char**)&imap_folder);
+
+	if (!git_config_get_value("imap.host", &val)) {
+		if(!val)
+			config_error_nonbool("imap.host");
+		else {
+			if (starts_with(val, "imap:"))
+				val += 5;
+			else if (starts_with(val, "imaps:")) {
+				val += 6;
+				server.use_ssl = 1;
+			}
+			if (starts_with(val, "//"))
+				val += 2;
+			server.host = xstrdup(val);
 		}
-		if (starts_with(val, "//"))
-			val += 2;
-		server.host = xstrdup(val);
-	} else if (!strcmp("user", key))
-		server.user = xstrdup(val);
-	else if (!strcmp("pass", key))
-		server.pass = xstrdup(val);
-	else if (!strcmp("port", key))
-		server.port = git_config_int(key, val);
-	else if (!strcmp("tunnel", key))
-		server.tunnel = xstrdup(val);
-	else if (!strcmp("authmethod", key))
-		server.auth_method = xstrdup(val);
+	}
 
-	return 0;
+	git_config_get_string("imap.user", (const char**)&server.user);
+	git_config_get_string("imap.pass", (const char**)&server.pass);
+	git_config_get_string("imap.port", (const char**)&server.port);
+	git_config_get_string("imap.tunnel", (const char**)&server.tunnel);
+	git_config_get_string("imap.authmethod", (const char**)&server.auth_method);
 }
 
 int main(int argc, char **argv)
@@ -1383,7 +1375,7 @@ int main(int argc, char **argv)
 		usage(imap_send_usage);
 
 	setup_git_directory_gently(&nongit_ok);
-	git_config(git_imap_config, NULL);
+	git_imap_config();
 
 	if (!server.port)
 		server.port = server.use_ssl ? 993 : 143;
--