git-config-set: support selecting values by non-matching regex

diff --git a/config-set.c b/config-set.c
index 90a28b381ff8bb25e148f3e81f9a57a46ab0c962..5f654f7aff1cfa4cdbe5400d328363d4a91d490c 100644 (file)
--- a/config-set.c
+++ b/config-set.c
@@ -8,13 +8,15 @@ static char* key = NULL;
 static char* value = NULL;
 static regex_t* regex = NULL;
 static int do_all = 0;
+static int do_not_match = 0;
 static int seen = 0;
 
 static int show_config(const char* key_, const char* value_)
 {
        if (!strcmp(key_, key) &&
                        (regex == NULL ||
-                        !regexec(regex, value_, 0, NULL, 0))) {
+                        (do_not_match ^
+                         !regexec(regex, value_, 0, NULL, 0)))) {
                if (do_all) {
                        printf("%s\n", value_);
                        return 0;
@@ -38,6 +40,11 @@ static int get_value(const char* key_, const char* regex_)
                key[i] = tolower(key_[i]);
 
        if (regex_) {
+               if (regex_[0] == '!') {
+                       do_not_match = 1;
+                       regex_++;
+               }
+
                regex = (regex_t*)malloc(sizeof(regex_t));
                if (regcomp(regex, regex_, REG_EXTENDED)) {
                        fprintf(stderr, "Invalid pattern: %s\n", regex_);