Re: [PATCH v2 2/2] blame: introduce --override-ignore-revs to bypass ignore revisions list

> From: Abhijeetsingh Meena <abhijeet040403@gmail.com>
> 
> The git blame command can ignore a list of revisions specified either
> through the --ignore-revs-file option or the blame.ignoreRevsFile
> configuration. This feature is useful for excluding irrelevant
> commits, such as formatting changes or large refactors, from blame
> annotations.
> 
> However, users may encounter cases where they need to
> temporarily override these configurations to inspect all commits,
> even those excluded by the ignore list. Currently, there is no
> simple way to bypass all ignore revisions settings in one go.

> This patch introduces the --override-ignore-revs option (or -O),
> which allows users to easily bypass the --ignore-revs-file
> option, --ignore-rev option and the blame.ignoreRevsFile
> configuration. When this option is used, git blame will completely
> disregard all configured ignore revisions lists.
> 
> The motivation behind this feature is to provide users with more
> flexibility when dealing with large codebases that rely on
> .git-blame-ignore-revs files for shared configurations, while
> still allowing them to disable the ignore list when necessary
> for troubleshooting or deeper inspections.
> 
> Signed-off-by: Abhijeetsingh Meena <abhijeet040403@gmail.com>
> ---
>   builtin/blame.c                       |  8 +++++++-
>   t/t8016-blame-override-ignore-revs.sh | 25 +++++++++++++++++++++++++
>   2 files changed, 32 insertions(+), 1 deletion(-)
>   create mode 100755 t/t8016-blame-override-ignore-revs.sh
> 
> diff --git a/builtin/blame.c b/builtin/blame.c
> index 1eddabaf60f..956520edcd9 100644
> --- a/builtin/blame.c
> +++ b/builtin/blame.c
> @@ -69,6 +69,7 @@ static int coloring_mode;
>   static struct string_list ignore_revs_file_list = STRING_LIST_INIT_DUP;
>   static int mark_unblamable_lines;
>   static int mark_ignored_lines;
> +static int override_ignore_revs = 0;
>   
>   static struct date_mode blame_date_mode = { DATE_ISO8601 };
>   static size_t blame_date_width;
> @@ -901,6 +902,7 @@ int cmd_blame(int argc,
>   		OPT_BIT('w', NULL, &xdl_opts, N_("ignore whitespace differences"), XDF_IGNORE_WHITESPACE),
>   		OPT_STRING_LIST(0, "ignore-rev", &ignore_rev_list, N_("rev"), N_("ignore <rev> when blaming")),
>   		OPT_STRING_LIST(0, "ignore-revs-file", &ignore_revs_file_list, N_("file"), N_("ignore revisions from <file>")),
> +		OPT_BOOL('O', "override-ignore-revs", &override_ignore_revs, N_("override all configurations that exclude revisions")),
>   		OPT_BIT(0, "color-lines", &output_option, N_("color redundant metadata from previous line differently"), OUTPUT_COLOR_LINE),
>   		OPT_BIT(0, "color-by-age", &output_option, N_("color lines by age"), OUTPUT_SHOW_AGE_WITH_COLOR),
>   		OPT_BIT(0, "minimal", &xdl_opts, N_("spend extra cycles to find better match"), XDF_NEED_MINIMAL),
> @@ -1119,7 +1121,11 @@ parse_done:
>   	sb.reverse = reverse;
>   	sb.repo = the_repository;
>   	sb.path = path;
> -	build_ignorelist(&sb, &ignore_revs_file_list, &ignore_rev_list);
> +
> +	if (!override_ignore_revs) {
> +		build_ignorelist(&sb, &ignore_revs_file_list, &ignore_rev_list);
> +	}
> +
>   	string_list_clear(&ignore_revs_file_list, 0);
>   	string_list_clear(&ignore_rev_list, 0);
>   	setup_scoreboard(&sb, &o);
> diff --git a/t/t8016-blame-override-ignore-revs.sh b/t/t8016-blame-override-ignore-revs.sh
> new file mode 100755
> index 00000000000..b5899729f8e
> --- /dev/null
> +++ b/t/t8016-blame-override-ignore-revs.sh
> @@ -0,0 +1,25 @@
> +#!/bin/sh
> +
> +test_description='default revisions to ignore when blaming'
> +
> +TEST_PASSES_SANITIZE_LEAK=true
> +. ./test-lib.sh
> +
> +test_expect_success 'blame: override-ignore-revs' '
> +    test_commit first-commit hello.txt hello &&
> +
> +    echo world >>hello.txt &&
> +    test_commit second-commit hello.txt &&
> +
> +    sed "1s/hello/hi/" <hello.txt > hello.txt.tmp &&
> +    mv hello.txt.tmp hello.txt &&
> +    test_commit third-commit hello.txt &&
> +
> +    git blame hello.txt >expect &&
> +    git rev-parse HEAD >.git-blame-ignore-revs &&
> +    git blame -O hello.txt >actual &&
> +
> +    test_cmp expect actual
> +'
> +
> +test_done