Merge branch 'ms/refs-list'

The "list" subcommand of "git refs" acts as a front-end for
"git for-each-ref".

* ms/refs-list:
  t: add test for git refs list subcommand
  t6300: refactor tests to be shareable
  builtin/refs: add list subcommand
  builtin/for-each-ref: factor out core logic into a helper
  builtin/for-each-ref: align usage string with the man page
  doc: factor out common option

Author: gitster

Documentation/for-each-ref-options.adoc

@@ -0,0 +1,88 @@
+<pattern>...::
+	If one or more patterns are given, only refs are shown that
+	match against at least one pattern, either using fnmatch(3) or
+	literally, in the latter case matching completely or from the
+	beginning up to a slash.
+
+--stdin::
+	If `--stdin` is supplied, then the list of patterns is read from
+	standard input instead of from the argument list.
+
+--count=<count>::
+	By default the command shows all refs that match
+	`<pattern>`.  This option makes it stop after showing
+	that many refs.
+
+--sort=<key>::
+	A field name to sort on.  Prefix `-` to sort in
+	descending order of the value.  When unspecified,
+	`refname` is used.  You may use the --sort=<key> option
+	multiple times, in which case the last key becomes the primary
+	key.
+
+--format=<format>::
+	A string that interpolates `%(fieldname)` from a ref being shown and
+	the object it points at. In addition, the string literal `%%`
+	renders as `%` and `%xx` - where `xx` are hex digits - renders as
+	the character with hex code `xx`. For example, `%00` interpolates to
+	`\0` (NUL), `%09` to `\t` (TAB), and `%0a` to `\n` (LF).
++
+When unspecified, `<format>` defaults to `%(objectname) SPC %(objecttype)
+TAB %(refname)`.
+
+--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::
+--tcl::
+	If given, strings that substitute `%(fieldname)`
+	placeholders are quoted as string literals suitable for
+	the specified host language.  This is meant to produce
+	a scriptlet that can directly be `eval`ed.
+
+--points-at=<object>::
+	Only list refs which points at the given object.
+
+--merged[=<object>]::
+	Only list refs whose tips are reachable from the
+	specified commit (HEAD if not specified).
+
+--no-merged[=<object>]::
+	Only list refs whose tips are not reachable from the
+	specified commit (HEAD if not specified).
+
+--contains[=<object>]::
+	Only list refs which contain the specified commit (HEAD if not
+	specified).
+
+--no-contains[=<object>]::
+	Only list refs which don't contain the specified commit (HEAD
+	if not specified).
+
+--ignore-case::
+	Sorting and filtering refs are case insensitive.
+
+--omit-empty::
+	Do not print a newline after formatted refs where the format expands
+	to the empty string.
+
+--exclude=<pattern>::
+	If one or more patterns are given, only refs which do not match
+	any excluded pattern(s) are shown. Matching is done using the
+	same rules as `<pattern>` above.
+
+--include-root-refs::
+	List root refs (HEAD and pseudorefs) apart from regular refs.
+
+--start-after=<marker>::
+    Allows paginating the output by skipping references up to and including the
+    specified marker. When paging, it should be noted that references may be
+    deleted, modified or added between invocations. Output will only yield those
+    references which follow the marker lexicographically. Output begins from the
+    first reference that would come after the marker alphabetically. Cannot be
+    used with `--sort=<key>` or `--stdin` options, or the _<pattern>_ argument(s)
+    to limit the refs.

Documentation/git-for-each-ref.adoc

@@ -28,94 +28,7 @@ host language allowing their direct evaluation in that language.
 
 OPTIONS
 -------
-<pattern>...::
-	If one or more patterns are given, only refs are shown that
-	match against at least one pattern, either using fnmatch(3) or
-	literally, in the latter case matching completely or from the
-	beginning up to a slash.
-
---stdin::
-	If `--stdin` is supplied, then the list of patterns is read from
-	standard input instead of from the argument list.
-
---count=<count>::
-	By default the command shows all refs that match
-	`<pattern>`.  This option makes it stop after showing
-	that many refs.
-
---sort=<key>::
-	A field name to sort on.  Prefix `-` to sort in
-	descending order of the value.  When unspecified,
-	`refname` is used.  You may use the --sort=<key> option
-	multiple times, in which case the last key becomes the primary
-	key.
-
---format=<format>::
-	A string that interpolates `%(fieldname)` from a ref being shown and
-	the object it points at. In addition, the string literal `%%`
-	renders as `%` and `%xx` - where `xx` are hex digits - renders as
-	the character with hex code `xx`. For example, `%00` interpolates to
-	`\0` (NUL), `%09` to `\t` (TAB), and `%0a` to `\n` (LF).
-+
-When unspecified, `<format>` defaults to `%(objectname) SPC %(objecttype)
-TAB %(refname)`.
-
---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::
---tcl::
-	If given, strings that substitute `%(fieldname)`
-	placeholders are quoted as string literals suitable for
-	the specified host language.  This is meant to produce
-	a scriptlet that can directly be `eval`ed.
-
---points-at=<object>::
-	Only list refs which points at the given object.
-
---merged[=<object>]::
-	Only list refs whose tips are reachable from the
-	specified commit (HEAD if not specified).
-
---no-merged[=<object>]::
-	Only list refs whose tips are not reachable from the
-	specified commit (HEAD if not specified).
-
---contains[=<object>]::
-	Only list refs which contain the specified commit (HEAD if not
-	specified).
-
---no-contains[=<object>]::
-	Only list refs which don't contain the specified commit (HEAD
-	if not specified).
-
---ignore-case::
-	Sorting and filtering refs are case insensitive.
-
---omit-empty::
-	Do not print a newline after formatted refs where the format expands
-	to the empty string.
-
---exclude=<pattern>::
-	If one or more patterns are given, only refs which do not match
-	any excluded pattern(s) are shown. Matching is done using the
-	same rules as `<pattern>` above.
-
---include-root-refs::
-	List root refs (HEAD and pseudorefs) apart from regular refs.
-
---start-after=<marker>::
-    Allows paginating the output by skipping references up to and including the
-    specified marker. When paging, it should be noted that references may be
-    deleted, modified or added between invocations. Output will only yield those
-    references which follow the marker lexicographically. Output begins from the
-    first reference that would come after the marker alphabetically. Cannot be
-    used with `--sort=<key>` or `--stdin` options, or the _<pattern>_ argument(s)
-    to limit the refs.
+include::for-each-ref-options.adoc[]
 
 FIELD NAMES
 -----------

Documentation/git-refs.adoc

@@ -11,6 +11,13 @@ SYNOPSIS
 [synopsis]
 git refs migrate --ref-format=<format> [--no-reflog] [--dry-run]
 git refs verify [--strict] [--verbose]
+git refs list [--count=<count>] [--shell|--perl|--python|--tcl]
+		   [(--sort=<key>)...] [--format=<format>]
+		   [--include-root-refs] [--points-at=<object>]
+		   [--merged[=<object>]] [--no-merged[=<object>]]
+		   [--contains[=<object>]] [--no-contains[=<object>]]
+		   [(--exclude=<pattern>)...] [--start-after=<marker>]
+		   [ --stdin | <pattern>... ]
 
 DESCRIPTION
 -----------
@@ -26,6 +33,11 @@ migrate::
 verify::
 	Verify reference database consistency.
 
+list::
+	List references in the repository with support for filtering,
+	formatting, and sorting. This subcommand is an alias for
+	linkgit:git-for-each-ref[1] and offers identical functionality.
+
 OPTIONS
 -------
 
@@ -57,6 +69,10 @@ The following options are specific to 'git refs verify':
 --verbose::
 	When verifying the reference database consistency, be chatty.
 
+The following options are specific to 'git refs list':
+
+include::for-each-ref-options.adoc[]
+
 KNOWN LIMITATIONS
 -----------------
 

builtin/for-each-ref.c

@@ -2,26 +2,15 @@
 #include "commit.h"
 #include "config.h"
 #include "environment.h"
+#include "for-each-ref.h"
 #include "gettext.h"
 #include "object.h"
 #include "parse-options.h"
 #include "ref-filter.h"
 #include "strbuf.h"
 #include "strvec.h"
 
-static char const * const for_each_ref_usage[] = {
-	N_("git for-each-ref [<options>] [<pattern>]"),
-	N_("git for-each-ref [--points-at <object>]"),
-	N_("git for-each-ref [--merged [<commit>]] [--no-merged [<commit>]]"),
-	N_("git for-each-ref [--contains [<commit>]] [--no-contains [<commit>]]"),
-	N_("git for-each-ref [--start-after <marker>]"),
-	NULL
-};
-
-int cmd_for_each_ref(int argc,
-		     const char **argv,
-		     const char *prefix,
-		     struct repository *repo)
+int for_each_ref_core(int argc, const char **argv, const char *prefix, struct repository *repo, const char *const *usage)
 {
 	struct ref_sorting *sorting;
 	struct string_list sorting_options = STRING_LIST_INIT_DUP;
@@ -70,17 +59,17 @@ int cmd_for_each_ref(int argc,
 	/* Set default (refname) sorting */
 	string_list_append(&sorting_options, "refname");
 
-	parse_options(argc, argv, prefix, opts, for_each_ref_usage, 0);
+	parse_options(argc, argv, prefix, opts, usage, 0);
 	if (format.array_opts.max_count < 0) {
 		error("invalid --count argument: `%d'", format.array_opts.max_count);
-		usage_with_options(for_each_ref_usage, opts);
+		usage_with_options(usage, opts);
 	}
 	if (HAS_MULTI_BITS(format.quote_style)) {
 		error("more than one quoting style?");
-		usage_with_options(for_each_ref_usage, opts);
+		usage_with_options(usage, opts);
 	}
 	if (verify_ref_format(&format))
-		usage_with_options(for_each_ref_usage, opts);
+		usage_with_options(usage, opts);
 
 	if (filter.start_after && sorting_options.nr > 1)
 		die(_("cannot use --start-after with custom sort options"));
@@ -120,3 +109,16 @@ int cmd_for_each_ref(int argc,
 	strvec_clear(&vec);
 	return 0;
 }
+
+int cmd_for_each_ref(int argc,
+		     const char **argv,
+		     const char *prefix,
+		     struct repository *repo)
+{
+	static char const * const for_each_ref_usage[] = {
+		N_("git for-each-ref " COMMON_USAGE_FOR_EACH_REF),
+		NULL
+	};
+
+	return for_each_ref_core(argc, argv, prefix, repo, for_each_ref_usage);
+}

builtin/refs.c

@@ -6,6 +6,7 @@
 #include "refs.h"
 #include "strbuf.h"
 #include "worktree.h"
+#include "for-each-ref.h"
 
 #define REFS_MIGRATE_USAGE \
 	N_("git refs migrate --ref-format=<format> [--no-reflog] [--dry-run]")
@@ -101,6 +102,17 @@ static int cmd_refs_verify(int argc, const char **argv, const char *prefix,
 	return ret;
 }
 
+static int cmd_refs_list(int argc, const char **argv, const char *prefix,
+			   struct repository *repo)
+{
+	static char const * const refs_list_usage[] = {
+		N_("git refs list " COMMON_USAGE_FOR_EACH_REF),
+		NULL
+	};
+
+	return for_each_ref_core(argc, argv, prefix, repo, refs_list_usage);
+}
+
 int cmd_refs(int argc,
 	     const char **argv,
 	     const char *prefix,
@@ -109,12 +121,14 @@ int cmd_refs(int argc,
 	const char * const refs_usage[] = {
 		REFS_MIGRATE_USAGE,
 		REFS_VERIFY_USAGE,
+		"git refs list " COMMON_USAGE_FOR_EACH_REF,
 		NULL,
 	};
 	parse_opt_subcommand_fn *fn = NULL;
 	struct option opts[] = {
 		OPT_SUBCOMMAND("migrate", &fn, cmd_refs_migrate),
 		OPT_SUBCOMMAND("verify", &fn, cmd_refs_verify),
+		OPT_SUBCOMMAND("list", &fn, cmd_refs_list),
 		OPT_END(),
 	};
 

for-each-ref.h

@@ -0,0 +1,26 @@
+#ifndef FOR_EACH_REF_H
+#define FOR_EACH_REF_H
+
+struct repository;
+
+/*
+ * Shared usage string for options common to git-for-each-ref(1)
+ * and git-refs-list(1). The command-specific part (e.g., "git refs list ")
+ * must be prepended by the caller.
+ */
+#define COMMON_USAGE_FOR_EACH_REF \
+	"[--count=<count>] [--shell|--perl|--python|--tcl]\n" \
+	"                         [(--sort=<key>)...] [--format=<format>]\n" \
+	"                         [--include-root-refs] [--points-at=<object>]\n" \
+	"                         [--merged[=<object>]] [--no-merged[=<object>]]\n" \
+	"                         [--contains[=<object>]] [--no-contains[=<object>]]\n" \
+	"                         [(--exclude=<pattern>)...] [--start-after=<marker>]\n" \
+	"                         [ --stdin | <pattern>... ]"
+
+/*
+ * The core logic for for-each-ref and its clones.
+ */
+int for_each_ref_core(int argc, const char **argv, const char *prefix,
+		      struct repository *repo, const char *const *usage);
+
+#endif /* FOR_EACH_REF_H */