[PATCH] Add git-var a tool for reading interesting git variables.

[git.git] / var.c

diff --git a/var.c b/var.c
new file mode 100644 (file)
index 0000000..488ec51
--- /dev/null
+++ b/var.c
@@ -0,0 +1,65 @@
+/*
+ * GIT - The information manager from hell
+ *
+ * Copyright (C) Eric Biederman, 2005
+ */
+#include "cache.h"
+#include <stdio.h>
+#include <errno.h>
+#include <string.h>
+
+static char *var_usage = "git-var [-l | <variable>]";
+
+struct git_var {
+       const char *name;
+       char *(*read)(void);
+};
+static struct git_var git_vars[] = {
+       { "GIT_COMMITTER_IDENT", git_committer_info },
+       { "GIT_AUTHOR_IDENT",   git_author_info },
+       { "", NULL },
+};
+
+static void list_vars(void)
+{
+       struct git_var *ptr;
+       for(ptr = git_vars; ptr->read; ptr++) {
+               printf("%s=%s\n", ptr->name, ptr->read());
+       }
+}
+
+static const char *read_var(const char *var)
+{
+       struct git_var *ptr;
+       const char *val;
+       val = NULL;
+       for(ptr = git_vars; ptr->read; ptr++) {
+               if (strcmp(var, ptr->name) == 0) {
+                       val = ptr->read();
+                       break;
+               }
+       }
+       return val;
+}
+
+int main(int argc, char **argv)
+{
+       const char *val;
+       if (argc != 2) {
+               usage(var_usage);
+       }
+       setup_ident();
+       val = NULL;
+
+       if (strcmp(argv[1], "-l") == 0) {
+               list_vars();
+               return 0;
+       }
+       val = read_var(argv[1]);
+       if (!val)
+               usage(var_usage);
+       
+       printf("%s\n", val);
+       
+       return 0;
+}