From: "John Cai via GitGitGadget" <gitgitgadget@gmail.com>
To: git@vger.kernel.org
Cc: "Eric Sunshine" <sunshine@sunshineco.com>,
"Phillip Wood" <phillip.wood123@gmail.com>,
"Ævar Arnfjörð Bjarmason" <avarab@gmail.com>,
"Jeff King" <peff@peff.net>, "Elijah Newren" <newren@gmail.com>,
"John Cai" <johncai86@gmail.com>,
"John Cai" <johncai86@gmail.com>
Subject: [PATCH v3 1/2] diff: consolidate diff algorithm option parsing
Date: Fri, 17 Feb 2023 20:21:24 +0000 [thread overview]
Message-ID: <816c47aa414586e99aa762604396bd8be4fb11f4.1676665285.git.gitgitgadget@gmail.com> (raw)
In-Reply-To: <pull.1452.v3.git.git.1676665285.gitgitgadget@gmail.com>
From: John Cai <johncai86@gmail.com>
A subsequent commit will need the ability to tell if the diff algorithm
was set through the command line through setting a new member of
diff_options. While this logic can be added to the
diff_opt_diff_algorithm() callback, the `--minimal` and `--histogram`
options are handled via OPT_BIT without a callback.
Remedy this by consolidating the options parsing logic for --minimal and
--histogram into one callback. This way we can modify `diff_options` in
that function.
As an additional refactor, the logic that sets the diff algorithm in
diff_opt_diff_algorithm() can be refactored into a helper that will
allow multiple callsites to set the diff algorithm.
Signed-off-by: John Cai <johncai86@gmail.com>
---
diff.c | 57 +++++++++++++++++++++++++++++++++++++++++++--------------
1 file changed, 43 insertions(+), 14 deletions(-)
diff --git a/diff.c b/diff.c
index 329eebf16a0..5efc22ca06b 100644
--- a/diff.c
+++ b/diff.c
@@ -3437,6 +3437,22 @@ static int diff_filepair_is_phoney(struct diff_filespec *one,
return !DIFF_FILE_VALID(one) && !DIFF_FILE_VALID(two);
}
+static int set_diff_algorithm(struct diff_options *opts,
+ const char *alg)
+{
+ long value = parse_algorithm_value(alg);
+
+ if (value < 0)
+ return -1;
+
+ /* clear out previous settings */
+ DIFF_XDL_CLR(opts, NEED_MINIMAL);
+ opts->xdl_opts &= ~XDF_DIFF_ALGORITHM_MASK;
+ opts->xdl_opts |= value;
+
+ return 0;
+}
+
static void builtin_diff(const char *name_a,
const char *name_b,
struct diff_filespec *one,
@@ -5107,17 +5123,28 @@ static int diff_opt_diff_algorithm(const struct option *opt,
const char *arg, int unset)
{
struct diff_options *options = opt->value;
- long value = parse_algorithm_value(arg);
BUG_ON_OPT_NEG(unset);
- if (value < 0)
+
+ if (set_diff_algorithm(options, arg))
return error(_("option diff-algorithm accepts \"myers\", "
"\"minimal\", \"patience\" and \"histogram\""));
- /* clear out previous settings */
- DIFF_XDL_CLR(options, NEED_MINIMAL);
- options->xdl_opts &= ~XDF_DIFF_ALGORITHM_MASK;
- options->xdl_opts |= value;
+ return 0;
+}
+
+static int diff_opt_diff_algorithm_no_arg(const struct option *opt,
+ const char *arg, int unset)
+{
+ struct diff_options *options = opt->value;
+
+ BUG_ON_OPT_NEG(unset);
+ BUG_ON_OPT_ARG(arg);
+
+ if (set_diff_algorithm(options, opt->long_name))
+ BUG("available diff algorithms include \"myers\", "
+ "\"minimal\", \"patience\" and \"histogram\"");
+
return 0;
}
@@ -5250,7 +5277,6 @@ static int diff_opt_patience(const struct option *opt,
BUG_ON_OPT_NEG(unset);
BUG_ON_OPT_ARG(arg);
- options->xdl_opts = DIFF_WITH_ALG(options, PATIENCE_DIFF);
/*
* Both --patience and --anchored use PATIENCE_DIFF
* internally, so remove any anchors previously
@@ -5259,7 +5285,8 @@ static int diff_opt_patience(const struct option *opt,
for (i = 0; i < options->anchors_nr; i++)
free(options->anchors[i]);
options->anchors_nr = 0;
- return 0;
+
+ return set_diff_algorithm(options, "patience");
}
static int diff_opt_ignore_regex(const struct option *opt,
@@ -5562,9 +5589,10 @@ struct option *add_diff_options(const struct option *opts,
N_("prevent rename/copy detection if the number of rename/copy targets exceeds given limit")),
OPT_GROUP(N_("Diff algorithm options")),
- OPT_BIT(0, "minimal", &options->xdl_opts,
- N_("produce the smallest possible diff"),
- XDF_NEED_MINIMAL),
+ OPT_CALLBACK_F(0, "minimal", options, NULL,
+ N_("produce the smallest possible diff"),
+ PARSE_OPT_NONEG | PARSE_OPT_NOARG,
+ diff_opt_diff_algorithm_no_arg),
OPT_BIT_F('w', "ignore-all-space", &options->xdl_opts,
N_("ignore whitespace when comparing lines"),
XDF_IGNORE_WHITESPACE, PARSE_OPT_NONEG),
@@ -5590,9 +5618,10 @@ struct option *add_diff_options(const struct option *opts,
N_("generate diff using the \"patience diff\" algorithm"),
PARSE_OPT_NONEG | PARSE_OPT_NOARG,
diff_opt_patience),
- OPT_BITOP(0, "histogram", &options->xdl_opts,
- N_("generate diff using the \"histogram diff\" algorithm"),
- XDF_HISTOGRAM_DIFF, XDF_DIFF_ALGORITHM_MASK),
+ OPT_CALLBACK_F(0, "histogram", options, NULL,
+ N_("generate diff using the \"histogram diff\" algorithm"),
+ PARSE_OPT_NONEG | PARSE_OPT_NOARG,
+ diff_opt_diff_algorithm_no_arg),
OPT_CALLBACK_F(0, "diff-algorithm", options, N_("<algorithm>"),
N_("choose a diff algorithm"),
PARSE_OPT_NONEG, diff_opt_diff_algorithm),
--
gitgitgadget
next prev parent reply other threads:[~2023-02-17 20:21 UTC|newest]
Thread overview: 78+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-02-05 3:46 [PATCH 0/2] Teach diff to honor diff algorithms set through git attributes John Cai via GitGitGadget
2023-02-05 3:46 ` [PATCH 1/2] diff: consolidate diff algorithm option parsing John Cai via GitGitGadget
2023-02-06 16:20 ` Phillip Wood
2023-02-05 3:46 ` [PATCH 2/2] diff: teach diff to read gitattribute diff-algorithm John Cai via GitGitGadget
2023-02-05 17:50 ` Eric Sunshine
2023-02-06 13:10 ` John Cai
2023-02-06 16:27 ` Phillip Wood
2023-02-06 18:14 ` Eric Sunshine
2023-02-06 19:50 ` John Cai
2023-02-09 8:26 ` Elijah Newren
2023-02-09 10:31 ` "bad" diffs (was: [PATCH 2/2] diff: teach diff to read gitattribute diff-algorithm) Ævar Arnfjörð Bjarmason
2023-02-09 16:37 ` [PATCH 2/2] diff: teach diff to read gitattribute diff-algorithm John Cai
2023-02-06 16:39 ` Ævar Arnfjörð Bjarmason
2023-02-06 20:37 ` John Cai
2023-02-07 14:55 ` Phillip Wood
2023-02-07 17:00 ` John Cai
2023-02-09 9:09 ` Elijah Newren
2023-02-09 14:44 ` Phillip Wood
2023-02-10 9:57 ` Elijah Newren
2023-02-11 17:39 ` Phillip Wood
2023-02-11 1:59 ` Jeff King
2023-02-15 2:35 ` Elijah Newren
2023-02-15 4:21 ` Jeff King
2023-02-15 5:20 ` Junio C Hamano
2023-02-15 14:44 ` Phillip Wood
2023-02-15 15:00 ` Jeff King
2023-02-07 17:27 ` Ævar Arnfjörð Bjarmason
2023-02-15 14:47 ` Phillip Wood
2023-02-09 8:44 ` Elijah Newren
2023-02-14 21:16 ` John Cai
2023-02-15 3:41 ` Elijah Newren
2023-02-09 7:50 ` Elijah Newren
2023-02-09 9:41 ` Ævar Arnfjörð Bjarmason
2023-02-11 2:04 ` Jeff King
2023-02-07 17:56 ` Jeff King
2023-02-07 20:18 ` Ævar Arnfjörð Bjarmason
2023-02-07 20:47 ` Junio C Hamano
2023-02-07 21:05 ` Ævar Arnfjörð Bjarmason
2023-02-07 21:28 ` Junio C Hamano
2023-02-07 21:44 ` Ævar Arnfjörð Bjarmason
2023-02-09 16:34 ` John Cai
2023-02-11 1:39 ` Jeff King
2023-02-14 21:40 ` [PATCH v2 0/2] Teach diff to honor diff algorithms set through git attributes John Cai via GitGitGadget
2023-02-14 21:40 ` [PATCH v2 1/2] diff: consolidate diff algorithm option parsing John Cai via GitGitGadget
2023-02-15 2:38 ` Junio C Hamano
2023-02-15 23:34 ` John Cai
2023-02-15 23:42 ` Junio C Hamano
2023-02-16 2:14 ` Jeff King
2023-02-16 2:57 ` Junio C Hamano
2023-02-16 20:34 ` John Cai
2023-02-14 21:40 ` [PATCH v2 2/2] diff: teach diff to read gitattribute diff-algorithm John Cai via GitGitGadget
2023-02-15 2:56 ` Junio C Hamano
2023-02-15 3:20 ` Junio C Hamano
2023-02-16 20:37 ` John Cai
2023-02-17 20:21 ` [PATCH v3 0/2] Teach diff to honor diff algorithms set through git attributes John Cai via GitGitGadget
2023-02-17 20:21 ` John Cai via GitGitGadget [this message]
2023-02-17 21:27 ` [PATCH v3 1/2] diff: consolidate diff algorithm option parsing Junio C Hamano
2023-02-18 1:36 ` Elijah Newren
2023-02-17 20:21 ` [PATCH v3 2/2] diff: teach diff to read algorithm from diff driver John Cai via GitGitGadget
2023-02-17 21:50 ` Junio C Hamano
2023-02-18 2:56 ` Elijah Newren
2023-02-20 15:32 ` John Cai
2023-02-20 16:21 ` Elijah Newren
2023-02-20 16:49 ` John Cai
2023-02-20 17:32 ` Elijah Newren
2023-02-20 20:53 ` John Cai
2023-02-22 19:47 ` Jeff King
2023-02-24 17:44 ` John Cai
2023-02-18 1:16 ` [PATCH v3 0/2] Teach diff to honor diff algorithms set through git attributes Elijah Newren
2023-02-20 13:37 ` John Cai
2023-02-20 21:04 ` [PATCH v4 " John Cai via GitGitGadget
2023-02-20 21:04 ` [PATCH v4 1/2] diff: consolidate diff algorithm option parsing John Cai via GitGitGadget
2023-02-20 21:04 ` [PATCH v4 2/2] diff: teach diff to read algorithm from diff driver John Cai via GitGitGadget
2023-02-21 17:34 ` [PATCH v4 0/2] Teach diff to honor diff algorithms set through git attributes Junio C Hamano
2023-02-21 18:05 ` Elijah Newren
2023-02-21 18:51 ` Junio C Hamano
2023-02-21 19:36 ` John Cai
2023-02-21 20:16 ` Elijah Newren
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