[PATCH v3 2/4] revision.h: refactor "disable_stdin" and "read_from_stdin"
From: Ævar Arnfjörð Bjarmason <hidden>
Date: 2021-06-21 15:10:28
Subsystem:
the rest · Maintainer:
Linus Torvalds
Change the two "disable_stdin" and "read_from_stdin" flags to an enum, in preparation for a subsequent commit adding more flags. The interaction between these is more subtle than they might appear at first sight, as noted in a12cbe23ef7. "read_stdin" is not the inverse of "disable_stdin", rather we read stdin if we see the "--stdin" option. The "read" is intended to understood as "I read it", not "you should read it". Let's avoid this confusion by using "consume" and "consumed" instead, i.e. a word whose present and past tense isn't the same. See 8b3dce56508 (Teach --stdin option to "log" family, 2009-11-03) where we added the "disable_stdin" flag, and a12cbe23ef7 (rev-list: make empty --stdin not an error, 2018-08-22) for the addition of the "read_from_stdin" flag. Signed-off-by: Ævar Arnfjörð Bjarmason <redacted> --- builtin/am.c | 4 ++-- builtin/blame.c | 2 +- builtin/diff-tree.c | 2 +- builtin/rev-list.c | 2 +- revision.c | 12 +++++++----- revision.h | 23 ++++++++++++++++++++--- sequencer.c | 4 ++-- 7 files changed, 34 insertions(+), 15 deletions(-)
diff --git a/builtin/am.c b/builtin/am.c
index 0b2d886c81b..3a6c8455b47 100644
--- a/builtin/am.c
+++ b/builtin/am.c@@ -1355,7 +1355,7 @@ static void write_commit_patch(const struct am_state *state, struct commit *comm repo_init_revisions(the_repository, &rev_info, NULL); rev_info.diff = 1; rev_info.abbrev = 0; - rev_info.disable_stdin = 1; + rev_info.stdin_handling = REV_INFO_STDIN_IGNORE; rev_info.show_root_diff = 1; rev_info.diffopt.output_format = DIFF_FORMAT_PATCH; rev_info.no_commit_id = 1;
@@ -1390,7 +1390,7 @@ static void write_index_patch(const struct am_state *state) fp = xfopen(am_path(state, "patch"), "w"); repo_init_revisions(the_repository, &rev_info, NULL); rev_info.diff = 1; - rev_info.disable_stdin = 1; + rev_info.stdin_handling = REV_INFO_STDIN_IGNORE; rev_info.no_commit_id = 1; rev_info.diffopt.output_format = DIFF_FORMAT_PATCH; rev_info.diffopt.use_color = 0;
diff --git a/builtin/blame.c b/builtin/blame.c
index 641523ff9af..c9f66c58c46 100644
--- a/builtin/blame.c
+++ b/builtin/blame.c@@ -1061,7 +1061,7 @@ int cmd_blame(int argc, const char **argv, const char *prefix) argv[argc - 1] = "--"; } - revs.disable_stdin = 1; + revs.stdin_handling = REV_INFO_STDIN_IGNORE; setup_revisions(argc, argv, &revs, NULL); if (!revs.pending.nr && is_bare_repository()) { struct commit *head_commit;
diff --git a/builtin/diff-tree.c b/builtin/diff-tree.c
index f33d30d57bf..fc548ebe166 100644
--- a/builtin/diff-tree.c
+++ b/builtin/diff-tree.c@@ -122,7 +122,7 @@ int cmd_diff_tree(int argc, const char **argv, const char *prefix) die(_("index file corrupt")); opt->abbrev = 0; opt->diff = 1; - opt->disable_stdin = 1; + opt->stdin_handling = REV_INFO_STDIN_IGNORE; memset(&s_r_opt, 0, sizeof(s_r_opt)); s_r_opt.tweak = diff_tree_tweak_rev;
diff --git a/builtin/rev-list.c b/builtin/rev-list.c
index 7677b1af5a4..524632ba328 100644
--- a/builtin/rev-list.c
+++ b/builtin/rev-list.c@@ -651,7 +651,7 @@ int cmd_rev_list(int argc, const char **argv, const char *prefix) if ((!revs.commits && reflog_walk_empty(revs.reflog_info) && (!(revs.tag_objects || revs.tree_objects || revs.blob_objects) && !revs.pending.nr) && - !revs.rev_input_given && !revs.read_from_stdin) || + !revs.rev_input_given && !revs.consumed_stdin) || revs.diff) usage(rev_list_usage);
diff --git a/revision.c b/revision.c
index 8140561b6c7..a65f9b89e99 100644
--- a/revision.c
+++ b/revision.c@@ -2741,14 +2741,16 @@ int setup_revisions(int argc, const char **argv, struct rev_info *revs, struct s } if (!strcmp(arg, "--stdin")) { - if (revs->disable_stdin) { + switch (revs->stdin_handling) { + case REV_INFO_STDIN_IGNORE: argv[left++] = arg; continue; + case REV_INFO_STDIN_CONSUME_ON_OPTION: + if (revs->consumed_stdin++) + die("--stdin given twice?"); + read_revisions_from_stdin(revs, &prune_data); + continue; } - if (revs->read_from_stdin++) - die("--stdin given twice?"); - read_revisions_from_stdin(revs, &prune_data); - continue; } if (!strcmp(arg, "--end-of-options")) {
diff --git a/revision.h b/revision.h
index 17698cb51ac..79a3421cd1f 100644
--- a/revision.h
+++ b/revision.h@@ -86,6 +86,11 @@ struct rev_cmdline_info { struct oidset; struct topo_walk_info; +enum rev_info_stdin { + REV_INFO_STDIN_CONSUME_ON_OPTION = 0, + REV_INFO_STDIN_IGNORE, +}; + struct rev_info { /* Starting list */ struct commit_list *commits;
@@ -114,9 +119,22 @@ struct rev_info { int rev_input_given; /* - * Whether we read from stdin due to the --stdin option. + * How should we handle seeing --stdin? + * + * Defaults to REV_INFO_STDIN_CONSUME_ON_OPTION where we'll + * attempt to read it if we see the --stdin option. + * + * Can be set to REV_INFO_STDIN_IGNORE to ignore the --stdin + * option. + */ + enum rev_info_stdin stdin_handling; + + /* + * Did we read from stdin due to stdin_handling == + * REV_INFO_STDIN_CONSUME_ON_OPTION and seeing the --stdin + * option? */ - int read_from_stdin; + int consumed_stdin; /* topo-sort */ enum rev_sort_order sort_order;
@@ -216,7 +234,6 @@ struct rev_info { date_mode_explicit:1, preserve_subject:1, encode_email_headers:1; - unsigned int disable_stdin:1; /* --show-linear-break */ unsigned int track_linear:1, track_first_time:1,
diff --git a/sequencer.c b/sequencer.c
index 0bec01cf38e..4e73bd79d69 100644
--- a/sequencer.c
+++ b/sequencer.c@@ -3377,7 +3377,7 @@ static int make_patch(struct repository *r, log_tree_opt.abbrev = 0; log_tree_opt.diff = 1; log_tree_opt.diffopt.output_format = DIFF_FORMAT_PATCH; - log_tree_opt.disable_stdin = 1; + log_tree_opt.stdin_handling = REV_INFO_STDIN_IGNORE; log_tree_opt.no_commit_id = 1; log_tree_opt.diffopt.file = fopen(buf.buf, "w"); log_tree_opt.diffopt.use_color = GIT_COLOR_NEVER;
@@ -4513,7 +4513,7 @@ static int pick_commits(struct repository *r, log_tree_opt.diff = 1; log_tree_opt.diffopt.output_format = DIFF_FORMAT_DIFFSTAT; - log_tree_opt.disable_stdin = 1; + log_tree_opt.stdin_handling = REV_INFO_STDIN_IGNORE; if (read_oneliner(&buf, rebase_path_orig_head(), 0) && !get_oid(buf.buf, &orig) &&
--
2.32.0.599.g3967b4fa4ac