From 73a834e9e27906a76940f1ced5c132bce205d3f8 Mon Sep 17 00:00:00 2001 From: Eric Sunshine Date: Sun, 22 Jul 2018 05:57:12 -0400 Subject: [PATCH] range-diff: relieve callers of low-level configuration burden There are a number of very low-level configuration details which need to be managed precisely to generate a proper range-diff. In particular, 'diff_options' output format, header suppression, indentation, and dual-color mode must all be set appropriately to ensure proper behavior. Handle these details locally in the libified range-diff back-end rather than forcing each caller to have specialized knowledge of these implementation details, and to avoid duplication as new callers are added. While at it, localize these tweaks to be active only while generating the range-diff, so they don't clobber the caller-provided 'diff_options', which might be used beyond range-diff generation. Signed-off-by: Eric Sunshine Signed-off-by: Junio C Hamano --- builtin/range-diff.c | 23 ++++------------------- range-diff.c | 24 ++++++++++++++++++++++-- range-diff.h | 3 ++- 3 files changed, 28 insertions(+), 22 deletions(-) diff --git a/builtin/range-diff.c b/builtin/range-diff.c index 006e766726..cc06e86a72 100644 --- a/builtin/range-diff.c +++ b/builtin/range-diff.c @@ -11,11 +11,6 @@ N_("git range-diff [] "), NULL }; -static struct strbuf *output_prefix_cb(struct diff_options *opt, void *data) -{ - return data; -} - int cmd_range_diff(int argc, const char **argv, const char *prefix) { int creation_factor = RANGE_DIFF_CREATION_FACTOR_DEFAULT; @@ -29,17 +24,11 @@ int cmd_range_diff(int argc, const char **argv, const char *prefix) OPT_END() }; int i, j, res = 0; - struct strbuf four_spaces = STRBUF_INIT; struct strbuf range1 = STRBUF_INIT, range2 = STRBUF_INIT; git_config(git_diff_ui_config, NULL); diff_setup(&diffopt); - diffopt.output_format = DIFF_FORMAT_PATCH; - diffopt.flags.suppress_diff_headers = 1; - diffopt.output_prefix = output_prefix_cb; - strbuf_addstr(&four_spaces, " "); - diffopt.output_prefix_data = &four_spaces; argc = parse_options(argc, argv, NULL, options, builtin_range_diff_usage, PARSE_OPT_KEEP_UNKNOWN | @@ -63,12 +52,9 @@ int cmd_range_diff(int argc, const char **argv, const char *prefix) options + ARRAY_SIZE(options) - 1, /* OPT_END */ builtin_range_diff_usage, 0); - if (simple_color < 1) { - if (!simple_color) - /* force color when --dual-color was used */ - diffopt.use_color = 1; - diffopt.flags.dual_color_diffed_diffs = 1; - } + /* force color when --dual-color was used */ + if (!simple_color) + diffopt.use_color = 1; if (argc == 2) { if (!strstr(argv[0], "..")) @@ -106,11 +92,10 @@ int cmd_range_diff(int argc, const char **argv, const char *prefix) } res = show_range_diff(range1.buf, range2.buf, creation_factor, - &diffopt); + simple_color < 1, &diffopt); strbuf_release(&range1); strbuf_release(&range2); - strbuf_release(&four_spaces); return res; } diff --git a/range-diff.c b/range-diff.c index defe31f095..3dd2edda01 100644 --- a/range-diff.c +++ b/range-diff.c @@ -409,8 +409,14 @@ static void output(struct string_list *a, struct string_list *b, strbuf_release(&dashes); } +static struct strbuf *output_prefix_cb(struct diff_options *opt, void *data) +{ + return data; +} + int show_range_diff(const char *range1, const char *range2, - int creation_factor, struct diff_options *diffopt) + int creation_factor, int dual_color, + struct diff_options *diffopt) { int res = 0; @@ -423,9 +429,23 @@ int show_range_diff(const char *range1, const char *range2, res = error(_("could not parse log for '%s'"), range2); if (!res) { + struct diff_options opts; + struct strbuf indent = STRBUF_INIT; + + memcpy(&opts, diffopt, sizeof(opts)); + opts.output_format = DIFF_FORMAT_PATCH; + opts.flags.suppress_diff_headers = 1; + opts.flags.dual_color_diffed_diffs = dual_color; + opts.output_prefix = output_prefix_cb; + strbuf_addstr(&indent, " "); + opts.output_prefix_data = &indent; + diff_setup_done(&opts); + find_exact_matches(&branch1, &branch2); get_correspondences(&branch1, &branch2, creation_factor); - output(&branch1, &branch2, diffopt); + output(&branch1, &branch2, &opts); + + strbuf_release(&indent); } string_list_clear(&branch1, 1); diff --git a/range-diff.h b/range-diff.h index f26de5d0b0..190593f0c7 100644 --- a/range-diff.h +++ b/range-diff.h @@ -6,6 +6,7 @@ #define RANGE_DIFF_CREATION_FACTOR_DEFAULT 60 int show_range_diff(const char *range1, const char *range2, - int creation_factor, struct diff_options *diffopt); + int creation_factor, int dual_color, + struct diff_options *diffopt); #endif