[PATCH v6] checkout: add --progress option

Under normal circumstances, and like other git commands,
git checkout will write progress info to stderr if
attached to a terminal. This option allows progress
to be forced even if not using a terminal. Also,
progress can be skipped if using option --no-progress.

Signed-off-by: Edmundo Carmona Antoranz <redacted>
---

diff --git a/Documentation/git-checkout.txt b/Documentation/git-checkout.txt

@@ -107,6 +107,12 @@ OPTIONS
 --quiet::
        Quiet, suppress feedback messages.

+--[no-]progress::
+       Progress status is reported on the standard error stream
+       by default when it is attached to a terminal, unless --quiet
+       is specified. This flag enables progress reporting even if not
+       attached to a terminal, regardless of -q.

 -f::
 --force::
        When switching branches, proceed even if the index or the

diff --git a/builtin/checkout.c b/builtin/checkout.c

@@ -37,6 +37,7 @@ struct checkout_opts {
        int overwrite_ignore;
        int ignore_skipworktree;
        int ignore_other_worktrees;
+       int show_progress;

        const char *new_branch;
        const char *new_branch_force;

@@ -417,7 +418,7 @@ static int reset_tree(struct tree *tree, const struct checkout_opts *o,
        opts.reset = 1;
        opts.merge = 1;
        opts.fn = oneway_merge;
-       opts.verbose_update = !o->quiet && isatty(2);
+       opts.verbose_update = o->show_progress;
        opts.src_index = &the_index;
        opts.dst_index = &the_index;
        parse_tree(tree);

@@ -501,7 +502,7 @@ static int merge_working_tree(const struct checkout_opts *opts,
                topts.update = 1;
                topts.merge = 1;
                topts.gently = opts->merge && old->commit;
-               topts.verbose_update = !opts->quiet && isatty(2);
+               topts.verbose_update = opts->show_progress;
                topts.fn = twoway_merge;
                if (opts->overwrite_ignore) {
                        topts.dir = xcalloc(1, sizeof(*topts.dir));

@@ -1156,6 +1157,7 @@ int cmd_checkout(int argc, const char **argv, const char *prefix)
                                N_("second guess 'git checkout <no-such-branch>'")),
                OPT_BOOL(0, "ignore-other-worktrees", &opts.ignore_other_worktrees,
                         N_("do not check if another worktree is holding the given ref")),
+               OPT_BOOL(0, "progress", &opts.show_progress, N_("force progress reporting")),
                OPT_END(),
        };

@@ -1163,6 +1165,7 @@ int cmd_checkout(int argc, const char **argv, const char *prefix)
        memset(&new, 0, sizeof(new));
        opts.overwrite_ignore = 1;
        opts.prefix = prefix;
+       opts.show_progress = -1;

        gitmodules_config();
        git_config(git_checkout_config, &opts);

@@ -1172,6 +1175,13 @@ int cmd_checkout(int argc, const char **argv, const char *prefix)
        argc = parse_options(argc, argv, prefix, options, checkout_usage,
                             PARSE_OPT_KEEP_DASHDASH);

+       if (opts.show_progress < 0) {
+               if (opts.quiet)
+                       opts.show_progress = 0;
+               else
+                       opts.show_progress = isatty(2);
+       }
+
        if (conflict_style) {
                opts.merge = 1; /* implied */
                git_xmerge_config("merge.conflictstyle", conflict_style, NULL);
--

2.6.1