difftool: display the number of files in the diff queue in the prompt

[thirdparty/git.git] / diff.c

diff --git a/diff.c b/diff.c
index e34bf971207f7737c3b1a10968acd8ffb3ecf93d..a7d5a47edf36a8b6901886615b5f32da01ecb118 100644 (file)
--- a/diff.c
+++ b/diff.c
@@ -2899,11 +2899,16 @@ static void run_external_diff(const char *pgm,
                              struct diff_filespec *one,
                              struct diff_filespec *two,
                              const char *xfrm_msg,
-                             int complete_rewrite)
+                             int complete_rewrite,
+                             struct diff_options *o)
 {
        const char *spawn_arg[10];
        int retval;
        const char **arg = &spawn_arg[0];
+       struct diff_queue_struct *q = &diff_queued_diff;
+       const char *env[3] = { NULL };
+       char env_counter[50];
+       char env_total[50];
 
        if (one && two) {
                struct diff_tempfile *temp_one, *temp_two;
@@ -2928,7 +2933,14 @@ static void run_external_diff(const char *pgm,
        }
        *arg = NULL;
        fflush(NULL);
-       retval = run_command_v_opt(spawn_arg, RUN_USING_SHELL);
+
+       env[0] = env_counter;
+       snprintf(env_counter, sizeof(env_counter), "GIT_DIFF_PATH_COUNTER=%d",
+                       ++o->diff_path_counter);
+       env[1] = env_total;
+       snprintf(env_total, sizeof(env_total), "GIT_DIFF_PATH_TOTAL=%d", q->nr);
+
+       retval = run_command_v_opt_cd_env(spawn_arg, RUN_USING_SHELL, NULL, env);
        remove_tempfile();
        if (retval) {
                fprintf(stderr, "external diff died, stopping at %s.\n", name);
@@ -3042,7 +3054,7 @@ static void run_diff_cmd(const char *pgm,
 
        if (pgm) {
                run_external_diff(pgm, name, other, one, two, xfrm_msg,
-                                 complete_rewrite);
+                                 complete_rewrite, o);
                return;
        }
        if (one && two)
@@ -3317,6 +3329,8 @@ void diff_setup_done(struct diff_options *options)
                options->output_format = DIFF_FORMAT_NO_OUTPUT;
                DIFF_OPT_SET(options, EXIT_WITH_STATUS);
        }
+
+    options->diff_path_counter = 0;
 }
 
 static int opt_arg(const char *arg, int arg_short, const char *arg_long, int *val)