Merge branch 'jk/ui-color-always-to-auto-maint' (early part) into jk/ref-filter-colors-fix-maint

* 'jk/ui-color-always-to-auto-maint' (early part):
  color: make "always" the same as "auto" in config
  provide --color option for all ref-filter users
  t3205: use --color instead of color.branch=always
  t3203: drop "always" color test
  t6006: drop "always" color config tests
  t7502: use diff.noprefix for --verbose test
  t7508: use test_terminal for color output
  t3701: use test-terminal to collect color output
  t4015: prefer --color to -c color.diff=always
  test-terminal: set TERM=vt100

Author: gitster

Documentation/config.txt

@@ -1052,10 +1052,10 @@ clean.requireForce::
 
 color.branch::
 	A boolean to enable/disable color in the output of
-	linkgit:git-branch[1]. May be set to `always`,
-	`false` (or `never`) or `auto` (or `true`), in which case colors are used
-	only when the output is to a terminal. If unset, then the
-	value of `color.ui` is used (`auto` by default).
+	linkgit:git-branch[1]. May be set to `false` (or `never`) to
+	disable color entirely, `auto` (or `true` or `always`) in which
+	case colors are used only when the output is to a terminal.  If
+	unset, then the value of `color.ui` is used (`auto` by default).
 
 color.branch.<slot>::
 	Use customized color for branch coloration. `<slot>` is one of
@@ -1066,12 +1066,11 @@ color.branch.<slot>::
 
 color.diff::
 	Whether to use ANSI escape sequences to add color to patches.
-	If this is set to `always`, linkgit:git-diff[1],
+	If this is set to `true` or `auto`, linkgit:git-diff[1],
 	linkgit:git-log[1], and linkgit:git-show[1] will use color
-	for all patches.  If it is set to `true` or `auto`, those
-	commands will only use color when output is to the terminal.
-	If unset, then the value of `color.ui` is used (`auto` by
-	default).
+	when output is to the terminal. The value `always` is a
+	historical synonym for `auto`.  If unset, then the value of
+	`color.ui` is used (`auto` by default).
 +
 This does not affect linkgit:git-format-patch[1] or the
 'git-diff-{asterisk}' plumbing commands.  Can be overridden on the
@@ -1124,12 +1123,12 @@ color.grep.<slot>::
 --
 
 color.interactive::
-	When set to `always`, always use colors for interactive prompts
+	When set to `true` or `auto`, use colors for interactive prompts
 	and displays (such as those used by "git-add --interactive" and
-	"git-clean --interactive"). When false (or `never`), never.
-	When set to `true` or `auto`, use colors only when the output is
-	to the terminal. If unset, then the value of `color.ui` is
-	used (`auto` by default).
+	"git-clean --interactive") when the output is to the terminal.
+	When false (or `never`), never show colors. The value `always`
+	is a historical synonym for `auto`.  If unset, then the value of
+	`color.ui` is used (`auto` by default).
 
 color.interactive.<slot>::
 	Use customized color for 'git add --interactive' and 'git clean
@@ -1176,10 +1175,10 @@ color.ui::
 	configuration to set a default for the `--color` option.  Set it
 	to `false` or `never` if you prefer Git commands not to use
 	color unless enabled explicitly with some other configuration
-	or the `--color` option. Set it to `always` if you want all
-	output not intended for machine consumption to use color, to
-	`true` or `auto` (this is the default since Git 1.8.4) if you
-	want such output to use color when written to the terminal.
+	or the `--color` option. Set it to `true` or `auto` to enable
+	color when output is written to the terminal (this is also the
+	default since Git 1.8.4). The value `always` is a historical
+	synonym for `auto`.
 
 column.ui::
 	Specify whether supported commands should output in columns.

Documentation/git-for-each-ref.txt

@@ -56,6 +56,11 @@ OPTIONS
 	literally, in the latter case matching completely or from the
 	beginning up to a slash.
 
+--color[=<when>]:
+	Respect any colors specified in the `--format` option. The
+	`<when>` field must be one of `always`, `never`, or `auto` (if
+	`<when>` is absent, behave as if `always` was given).
+
 --shell::
 --perl::
 --python::

Documentation/git-tag.txt

@@ -115,6 +115,11 @@ options for details.
 	variable if it exists, or lexicographic order otherwise. See
 	linkgit:git-config[1].
 
+--color[=<when>]:
+	Respect any colors specified in the `--format` option. The
+	`<when>` field must be one of `always`, `never`, or `auto` (if
+	`<when>` is absent, behave as if `always` was given).
+
 -i::
 --ignore-case::
 	Sorting and filtering tags are case insensitive.

builtin/for-each-ref.c

@@ -36,6 +36,7 @@ int cmd_for_each_ref(int argc, const char **argv, const char *prefix)
 		OPT_GROUP(""),
 		OPT_INTEGER( 0 , "count", &maxcount, N_("show only <n> matched refs")),
 		OPT_STRING(  0 , "format", &format.format, N_("format"), N_("format to use for the output")),
+		OPT__COLOR(&format.use_color, N_("respect format colors")),
 		OPT_CALLBACK(0 , "sort", sorting_tail, N_("key"),
 			    N_("field name to sort on"), &parse_opt_ref_sorting),
 		OPT_CALLBACK(0, "points-at", &filter.points_at,

builtin/tag.c

@@ -411,6 +411,7 @@ int cmd_tag(int argc, const char **argv, const char *prefix)
 		},
 		OPT_STRING(  0 , "format", &format.format, N_("format"),
 			   N_("format to use for the output")),
+		OPT__COLOR(&format.use_color, N_("respect format colors")),
 		OPT_BOOL('i', "ignore-case", &icase, N_("sorting and filtering are case insensitive")),
 		OPT_END()
 	};

color.c

@@ -308,7 +308,7 @@ int git_config_colorbool(const char *var, const char *value)
 		if (!strcasecmp(value, "never"))
 			return 0;
 		if (!strcasecmp(value, "always"))
-			return 1;
+			return var ? GIT_COLOR_AUTO : 1;
 		if (!strcasecmp(value, "auto"))
 			return GIT_COLOR_AUTO;
 	}

t/t3203-branch-output.sh

@@ -253,13 +253,7 @@ test_expect_success '%(color) omitted without tty' '
 '
 
 test_expect_success TTY '%(color) present with tty' '
-	test_terminal env TERM=vt100 git branch $color_args >actual.raw &&
-	test_decode_color <actual.raw >actual &&
-	test_cmp expect.color actual
-'
-
-test_expect_success 'color.branch=always overrides auto-color' '
-	git -c color.branch=always branch $color_args >actual.raw &&
+	test_terminal git branch $color_args >actual.raw &&
 	test_decode_color <actual.raw >actual &&
 	test_cmp expect.color actual
 '

t/t3205-branch-color.sh

@@ -12,7 +12,6 @@ test_expect_success 'set up some sample branches' '
 # choose non-default colors to make sure config
 # is taking effect
 test_expect_success 'set up some color config' '
-	git config color.branch always &&
 	git config color.branch.local blue &&
 	git config color.branch.remote yellow &&
 	git config color.branch.current cyan
@@ -24,7 +23,7 @@ test_expect_success 'regular output shows colors' '
 	  <BLUE>other<RESET>
 	  <YELLOW>remotes/origin/master<RESET>
 	EOF
-	git branch -a >actual.raw &&
+	git branch --color -a >actual.raw &&
 	test_decode_color <actual.raw >actual &&
 	test_cmp expect actual
 '
@@ -36,7 +35,7 @@ test_expect_success 'verbose output shows colors' '
 	  <BLUE>other                <RESET> $oid foo
 	  <YELLOW>remotes/origin/master<RESET> $oid foo
 	EOF
-	git branch -v -a >actual.raw &&
+	git branch --color -v -a >actual.raw &&
 	test_decode_color <actual.raw >actual &&
 	test_cmp expect actual
 '

t/t3701-add-interactive.sh

@@ -2,6 +2,7 @@
 
 test_description='add -i basic tests'
 . ./test-lib.sh
+. "$TEST_DIRECTORY"/lib-terminal.sh
 
 if ! test_have_prereq PERL
 then
@@ -380,14 +381,11 @@ test_expect_success 'patch mode ignores unmerged entries' '
 	test_cmp expected diff
 '
 
-test_expect_success 'diffs can be colorized' '
+test_expect_success TTY 'diffs can be colorized' '
 	git reset --hard &&
 
-	# force color even though the test script has no terminal
-	test_config color.ui always &&
-
 	echo content >test &&
-	printf y | git add -p >output 2>&1 &&
+	printf y | test_terminal git add -p >output 2>&1 &&
 
 	# We do not want to depend on the exact coloring scheme
 	# git uses for diffs, so just check that we saw some kind of color.
@@ -485,4 +483,14 @@ test_expect_success 'hunk-editing handles custom comment char' '
 	git diff --exit-code
 '
 
+test_expect_success 'add -p works even with color.ui=always' '
+	git reset --hard &&
+	echo change >>file &&
+	test_config color.ui always &&
+	echo y | git add -p &&
+	echo file >expect &&
+	git diff --cached --name-only >actual &&
+	test_cmp expect actual
+'
+
 test_done

t/t4015-diff-whitespace.sh

@@ -821,7 +821,7 @@ test_expect_success 'diff that introduces a line with only tabs' '
 	echo "test" >x &&
 	git commit -m "initial" x &&
 	echo "{NTN}" | tr "NT" "\n\t" >>x &&
-	git -c color.diff=always diff | test_decode_color >current &&
+	git diff --color | test_decode_color >current &&
 
 	cat >expected <<-\EOF &&
 	<BOLD>diff --git a/x b/x<RESET>
@@ -851,7 +851,7 @@ test_expect_success 'diff that introduces and removes ws breakages' '
 		echo "2. and a new line "
 	} >x &&
 
-	git -c color.diff=always diff |
+	git diff --color |
 	test_decode_color >current &&
 
 	cat >expected <<-\EOF &&
@@ -923,50 +923,50 @@ test_expect_success 'ws-error-highlight test setup' '
 
 test_expect_success 'test --ws-error-highlight option' '
 
-	git -c color.diff=always diff --ws-error-highlight=default,old |
+	git diff --color --ws-error-highlight=default,old |
 	test_decode_color >current &&
 	test_cmp expect.default-old current &&
 
-	git -c color.diff=always diff --ws-error-highlight=all |
+	git diff --color --ws-error-highlight=all |
 	test_decode_color >current &&
 	test_cmp expect.all current &&
 
-	git -c color.diff=always diff --ws-error-highlight=none |
+	git diff --color --ws-error-highlight=none |
 	test_decode_color >current &&
 	test_cmp expect.none current
 
 '
 
 test_expect_success 'test diff.wsErrorHighlight config' '
 
-	git -c color.diff=always -c diff.wsErrorHighlight=default,old diff |
+	git -c diff.wsErrorHighlight=default,old diff --color |
 	test_decode_color >current &&
 	test_cmp expect.default-old current &&
 
-	git -c color.diff=always -c diff.wsErrorHighlight=all diff |
+	git -c diff.wsErrorHighlight=all diff --color |
 	test_decode_color >current &&
 	test_cmp expect.all current &&
 
-	git -c color.diff=always -c diff.wsErrorHighlight=none diff |
+	git -c diff.wsErrorHighlight=none diff --color |
 	test_decode_color >current &&
 	test_cmp expect.none current
 
 '
 
 test_expect_success 'option overrides diff.wsErrorHighlight' '
 
-	git -c color.diff=always -c diff.wsErrorHighlight=none \
-		diff --ws-error-highlight=default,old |
+	git -c diff.wsErrorHighlight=none \
+		diff --color --ws-error-highlight=default,old |
 	test_decode_color >current &&
 	test_cmp expect.default-old current &&
 
-	git -c color.diff=always -c diff.wsErrorHighlight=default \
-		diff --ws-error-highlight=all |
+	git -c diff.wsErrorHighlight=default \
+		diff --color --ws-error-highlight=all |
 	test_decode_color >current &&
 	test_cmp expect.all current &&
 
-	git -c color.diff=always -c diff.wsErrorHighlight=all \
-		diff --ws-error-highlight=none |
+	git -c diff.wsErrorHighlight=all \
+		diff --color --ws-error-highlight=none |
 	test_decode_color >current &&
 	test_cmp expect.none current