gpg-interface.c: use flags to determine key/signer info presence

Replace the logic used to determine whether key and signer information
is present to use explicit flags in sigcheck_gpg_status[] array.  This
is more future-proof, since it makes it possible to add additional
statuses without having to explicitly update the conditions.

Signed-off-by: Michał Górny <mgorny@gentoo.org>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

diff --git a/gpg-interface.c b/gpg-interface.c
index efe2c0d3863c7b4118d08c4152dbc6e1d5dcc09f..71618d86b9153a62b1b52b57fea1a5234d35b1f0 100644 (file)
--- a/gpg-interface.c
+++ b/gpg-interface.c
@@ -77,20 +77,27 @@ void signature_check_clear(struct signature_check *sigc)
 
 /* An exclusive status -- only one of them can appear in output */
 #define GPG_STATUS_EXCLUSIVE   (1<<0)
+/* The status includes key identifier */
+#define GPG_STATUS_KEYID       (1<<1)
+/* The status includes user identifier */
+#define GPG_STATUS_UID         (1<<2)
+
+/* Short-hand for standard exclusive *SIG status with keyid & UID */
+#define GPG_STATUS_STDSIG      (GPG_STATUS_EXCLUSIVE|GPG_STATUS_KEYID|GPG_STATUS_UID)
 
 static struct {
        char result;
        const char *check;
        unsigned int flags;
 } sigcheck_gpg_status[] = {
-       { 'G', "GOODSIG ", GPG_STATUS_EXCLUSIVE },
-       { 'B', "BADSIG ", GPG_STATUS_EXCLUSIVE },
+       { 'G', "GOODSIG ", GPG_STATUS_STDSIG },
+       { 'B', "BADSIG ", GPG_STATUS_STDSIG },
        { 'U', "TRUST_NEVER", 0 },
        { 'U', "TRUST_UNDEFINED", 0 },
-       { 'E', "ERRSIG ", GPG_STATUS_EXCLUSIVE },
-       { 'X', "EXPSIG ", GPG_STATUS_EXCLUSIVE },
-       { 'Y', "EXPKEYSIG ", GPG_STATUS_EXCLUSIVE },
-       { 'R', "REVKEYSIG ", GPG_STATUS_EXCLUSIVE },
+       { 'E', "ERRSIG ", GPG_STATUS_EXCLUSIVE|GPG_STATUS_KEYID },
+       { 'X', "EXPSIG ", GPG_STATUS_STDSIG },
+       { 'Y', "EXPKEYSIG ", GPG_STATUS_STDSIG },
+       { 'R', "REVKEYSIG ", GPG_STATUS_STDSIG },
 };
 
 static void parse_gpg_output(struct signature_check *sigc)
@@ -117,13 +124,13 @@ static void parse_gpg_output(struct signature_check *sigc)
                                }
 
                                sigc->result = sigcheck_gpg_status[i].result;
-                               /* The trust messages are not followed by key/signer information */
-                               if (sigc->result != 'U') {
+                               /* Do we have key information? */
+                               if (sigcheck_gpg_status[i].flags & GPG_STATUS_KEYID) {
                                        next = strchrnul(line, ' ');
                                        free(sigc->key);
                                        sigc->key = xmemdupz(line, next - line);
-                                       /* The ERRSIG message is not followed by signer information */
-                                       if (*next && sigc->result != 'E') {
+                                       /* Do we have signer information? */
+                                       if (*next && (sigcheck_gpg_status[i].flags & GPG_STATUS_UID)) {
                                                line = next + 1;
                                                next = strchrnul(line, '\n');
                                                free(sigc->signer);