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-rw-r--r--builtin/var.c93
1 files changed, 93 insertions, 0 deletions
diff --git a/builtin/var.c b/builtin/var.c
new file mode 100644
index 0000000..99d068a
--- /dev/null
+++ b/builtin/var.c
@@ -0,0 +1,93 @@
+/*
+ * GIT - The information manager from hell
+ *
+ * Copyright (C) Eric Biederman, 2005
+ */
+#include "builtin.h"
+
+static const char var_usage[] = "git var (-l | <variable>)";
+
+static const char *editor(int flag)
+{
+ const char *pgm = git_editor();
+
+ if (!pgm && flag & IDENT_ERROR_ON_NO_NAME)
+ die("Terminal is dumb, but EDITOR unset");
+
+ return pgm;
+}
+
+static const char *pager(int flag)
+{
+ const char *pgm = git_pager(1);
+
+ if (!pgm)
+ pgm = "cat";
+ return pgm;
+}
+
+struct git_var {
+ const char *name;
+ const char *(*read)(int);
+};
+static struct git_var git_vars[] = {
+ { "GIT_COMMITTER_IDENT", git_committer_info },
+ { "GIT_AUTHOR_IDENT", git_author_info },
+ { "GIT_EDITOR", editor },
+ { "GIT_PAGER", pager },
+ { "", NULL },
+};
+
+static void list_vars(void)
+{
+ struct git_var *ptr;
+ const char *val;
+
+ for (ptr = git_vars; ptr->read; ptr++)
+ if ((val = ptr->read(0)))
+ printf("%s=%s\n", ptr->name, val);
+}
+
+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(IDENT_ERROR_ON_NO_NAME);
+ break;
+ }
+ }
+ return val;
+}
+
+static int show_config(const char *var, const char *value, void *cb)
+{
+ if (value)
+ printf("%s=%s\n", var, value);
+ else
+ printf("%s\n", var);
+ return git_default_config(var, value, cb);
+}
+
+int cmd_var(int argc, const char **argv, const char *prefix)
+{
+ const char *val = NULL;
+ if (argc != 2)
+ usage(var_usage);
+
+ if (strcmp(argv[1], "-l") == 0) {
+ git_config(show_config, NULL);
+ list_vars();
+ return 0;
+ }
+ git_config(git_default_config, NULL);
+ val = read_var(argv[1]);
+ if (!val)
+ usage(var_usage);
+
+ printf("%s\n", val);
+
+ return 0;
+}