Revert "Build-in "git-shell""

[git.git] / shell.c

diff --git a/shell.c b/shell.c
new file mode 100644 (file)
index 0000000..0f6a727
--- /dev/null
+++ b/shell.c
@@ -0,0 +1,89 @@
+#include "cache.h"
+#include "quote.h"
+#include "exec_cmd.h"
+#include "strbuf.h"
+
+static int do_generic_cmd(const char *me, char *arg)
+{
+       const char *my_argv[4];
+
+       setup_path();
+       if (!arg || !(arg = sq_dequote(arg)))
+               die("bad argument");
+       if (prefixcmp(me, "git-"))
+               die("bad command");
+
+       my_argv[0] = me + 4;
+       my_argv[1] = arg;
+       my_argv[2] = NULL;
+
+       return execv_git_cmd(my_argv);
+}
+
+static int do_cvs_cmd(const char *me, char *arg)
+{
+       const char *cvsserver_argv[3] = {
+               "cvsserver", "server", NULL
+       };
+
+       if (!arg || strcmp(arg, "server"))
+               die("git-cvsserver only handles server: %s", arg);
+
+       setup_path();
+       return execv_git_cmd(cvsserver_argv);
+}
+
+
+static struct commands {
+       const char *name;
+       int (*exec)(const char *me, char *arg);
+} cmd_list[] = {
+       { "git-receive-pack", do_generic_cmd },
+       { "git-upload-pack", do_generic_cmd },
+       { "cvs", do_cvs_cmd },
+       { NULL },
+};
+
+int main(int argc, char **argv)
+{
+       char *prog;
+       struct commands *cmd;
+
+       /*
+        * Special hack to pretend to be a CVS server
+        */
+       if (argc == 2 && !strcmp(argv[1], "cvs server"))
+               argv--;
+
+       /*
+        * We do not accept anything but "-c" followed by "cmd arg",
+        * where "cmd" is a very limited subset of git commands.
+        */
+       else if (argc != 3 || strcmp(argv[1], "-c"))
+               die("What do you think I am? A shell?");
+
+       prog = argv[2];
+       if (!strncmp(prog, "git", 3) && isspace(prog[3]))
+               /* Accept "git foo" as if the caller said "git-foo". */
+               prog[3] = '-';
+
+       for (cmd = cmd_list ; cmd->name ; cmd++) {
+               int len = strlen(cmd->name);
+               char *arg;
+               if (strncmp(cmd->name, prog, len))
+                       continue;
+               arg = NULL;
+               switch (prog[len]) {
+               case '\0':
+                       arg = NULL;
+                       break;
+               case ' ':
+                       arg = prog + len + 1;
+                       break;
+               default:
+                       continue;
+               }
+               exit(cmd->exec(cmd->name, arg));
+       }
+       die("unrecognized command '%s'", prog);
+}