fast-import: Improve robustness when D->F changes provided in wrong order

diff --git a/connect.c b/connect.c
index 323a771b699cd1b35cc93fc408a1bbf6c9119abf..9ae991ac42544716599ff8bf3ebaaa376c8119e4 100644 (file)
--- a/connect.c
+++ b/connect.c
@@ -612,3 +612,40 @@ int finish_connect(struct child_process *conn)
        free(conn);
        return code;
 }
+
+char *git_getpass(const char *prompt)
+{
+       char *askpass;
+       struct child_process pass;
+       const char *args[3];
+       static struct strbuf buffer = STRBUF_INIT;
+
+       askpass = getenv("GIT_ASKPASS");
+
+       if (!askpass || !(*askpass))
+               return getpass(prompt);
+
+       args[0] = askpass;
+       args[1] = prompt;
+       args[2] = NULL;
+
+       memset(&pass, 0, sizeof(pass));
+       pass.argv = args;
+       pass.out = -1;
+
+       if (start_command(&pass))
+               exit(1);
+
+       strbuf_reset(&buffer);
+       if (strbuf_read(&buffer, pass.out, 20) < 0)
+               die("failed to read password from %s\n", askpass);
+
+       close(pass.out);
+
+       if (finish_command(&pass))
+               exit(1);
+
+       strbuf_setlen(&buffer, strcspn(buffer.buf, "\r\n"));
+
+       return buffer.buf;
+}