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[PATCH 5/7] config: plumb --literal-value into config API

From
Derrick Stolee via GitGitGadget <gitgitgadget@gmail.com>
Date
Nov 19, 2020, 15:52 UTC
Message-ID
<5881b2d987e3e8575d054a64fe21fbe7e7967aba.1605801143.git.gitgitgadget@gmail.com>
In-Reply-To
<pull.796.git.1605801143.gitgitgadget@gmail.com>
From: Derrick Stolee <dstolee@microsoft.com>

The git_config_set_multivar_in_file_gently() and related methods now take a 'flags' bitfield, so add a new bit representing the --literal-value option from 'git config'. This alters the purpose of the value_regex parameter to be an exact string match. This requires some initialization changes in git_config_set_multivar_in_file_gently() and a new strcmp() call in the matches() method.

The new CONFIG_FLAGS_LITERAL_VALUE flag is initialized in builtin/config.c based on the --literal-value option, and that needs to be updated in several callers.

This patch only affects some of the modes of 'git config', and the rest will be completed in the next change.

Signed-off-by: Derrick Stolee <dstolee@microsoft.com>
---
 builtin/config.c  | 16 +++++++++++-----
 config.c          |  5 +++++
 config.h          |  7 +++++++
 t/t1300-config.sh | 48 +++++++++++++++++++++++++++++++++++++++++++++++
 4 files changed, 71 insertions(+), 5 deletions(-)
diff --git a/builtin/config.c b/builtin/config.c
index ad6c695737..6ab5a0d68f 100644
--- a/builtin/config.c
+++ b/builtin/config.c
@@ -626,6 +626,7 @@ int cmd_config(int argc, const char **argv, const char *prefix)
 {
 	int nongit = !startup_info->have_repository;
 	char *value;
+	int flags = 0;
 
 	given_config_source.file = xstrdup_or_null(getenv(CONFIG_ENVIRONMENT));
 
@@ -761,6 +762,8 @@ int cmd_config(int argc, const char **argv, const char *prefix)
 		error(_("--literal only applies with 'value_regex'"));
 		usage_builtin_config();
 	}
+	if (literal)
+		flags = CONFIG_FLAGS_LITERAL_VALUE;
 
 	if (actions & PAGING_ACTIONS)
 		setup_auto_pager("config", 1);
@@ -823,7 +826,8 @@ int cmd_config(int argc, const char **argv, const char *prefix)
 		value = normalize_value(argv[0], argv[1]);
 		UNLEAK(value);
 		return git_config_set_multivar_in_file_gently(given_config_source.file,
-							      argv[0], value, argv[2], 0);
+							      argv[0], value, argv[2],
+							      flags);
 	}
 	else if (actions == ACTION_ADD) {
 		check_write();
@@ -832,7 +836,8 @@ int cmd_config(int argc, const char **argv, const char *prefix)
 		UNLEAK(value);
 		return git_config_set_multivar_in_file_gently(given_config_source.file,
 							      argv[0], value,
-							      CONFIG_REGEX_NONE, 0);
+							      CONFIG_REGEX_NONE,
+							      flags);
 	}
 	else if (actions == ACTION_REPLACE_ALL) {
 		check_write();
@@ -841,7 +846,7 @@ int cmd_config(int argc, const char **argv, const char *prefix)
 		UNLEAK(value);
 		return git_config_set_multivar_in_file_gently(given_config_source.file,
 							      argv[0], value, argv[2],
-							      CONFIG_FLAGS_MULTI_REPLACE);
+							      flags | CONFIG_FLAGS_MULTI_REPLACE);
 	}
 	else if (actions == ACTION_GET) {
 		check_argc(argc, 1, 2);
@@ -868,7 +873,8 @@ int cmd_config(int argc, const char **argv, const char *prefix)
 		check_argc(argc, 1, 2);
 		if (argc == 2)
 			return git_config_set_multivar_in_file_gently(given_config_source.file,
-								      argv[0], NULL, argv[1], 0);
+								      argv[0], NULL, argv[1],
+								      flags);
 		else
 			return git_config_set_in_file_gently(given_config_source.file,
 							     argv[0], NULL);
@@ -878,7 +884,7 @@ int cmd_config(int argc, const char **argv, const char *prefix)
 		check_argc(argc, 1, 2);
 		return git_config_set_multivar_in_file_gently(given_config_source.file,
 							      argv[0], NULL, argv[1],
-							      CONFIG_FLAGS_MULTI_REPLACE);
+							      flags | CONFIG_FLAGS_MULTI_REPLACE);
 	}
 	else if (actions == ACTION_RENAME_SECTION) {
 		int ret;
diff --git a/config.c b/config.c
index 4841c68a91..5028c1e736 100644
--- a/config.c
+++ b/config.c
@@ -2402,6 +2402,7 @@ struct config_store_data {
 	size_t baselen;
 	char *key;
 	int do_not_match;
+	const char *literal_value;
 	regex_t *value_regex;
 	int multi_replace;
 	struct {
@@ -2431,6 +2432,8 @@ static int matches(const char *key, const char *value,
 {
 	if (strcmp(key, store->key))
 		return 0; /* not ours */
+	if (store->literal_value)
+		return !strcmp(store->literal_value, value);
 	if (!store->value_regex)
 		return 1; /* always matches */
 	if (store->value_regex == CONFIG_REGEX_NONE)
@@ -2803,6 +2806,8 @@ int git_config_set_multivar_in_file_gently(const char *config_filename,
 			store.value_regex = NULL;
 		else if (value_regex == CONFIG_REGEX_NONE)
 			store.value_regex = CONFIG_REGEX_NONE;
+		else if (flags & CONFIG_FLAGS_LITERAL_VALUE)
+			store.literal_value = value_regex;
 		else {
 			if (value_regex[0] == '!') {
 				store.do_not_match = 1;
diff --git a/config.h b/config.h
index 266eb22e46..ddb81e1e32 100644
--- a/config.h
+++ b/config.h
@@ -77,6 +77,13 @@ enum config_event_t {
  */
 #define CONFIG_FLAGS_MULTI_REPLACE (1 << 0)
 
+/*
+ * When CONFIG_FLAGS_LITERAL_VALUE is specified, match key/value pairs
+ * by string comparison (not regex match) to the provided value_regex
+ * parameter.
+ */
+#define CONFIG_FLAGS_LITERAL_VALUE (1 << 1)
+
 /*
  * The parser event function (if not NULL) is called with the event type and
  * the begin/end offsets of the parsed elements.
diff --git a/t/t1300-config.sh b/t/t1300-config.sh
index 73f5ca4361..ed12b4f7a0 100755
--- a/t/t1300-config.sh
+++ b/t/t1300-config.sh
@@ -1978,4 +1978,52 @@ test_expect_success 'refuse --literal-value for incompatible actions' '
 	test_must_fail git config --literal-value --edit
 '
 
+test_expect_success '--literal-value uses exact string matching' '
+	GLOB="a+b*c?d[e]f.g" &&
+	q_to_tab >initial <<-EOF &&
+	[literal]
+	Qtest = $GLOB
+	EOF
+
+	cp initial .git/config &&
+	git config literal.test bogus "$GLOB" &&
+	q_to_tab >expect <<-EOF &&
+	[literal]
+	Qtest = $GLOB
+	Qtest = bogus
+	EOF
+	test_cmp expect .git/config &&
+	cp initial .git/config &&
+	git config --literal-value literal.test bogus "$GLOB" &&
+	q_to_tab >expect <<-EOF &&
+	[literal]
+	Qtest = bogus
+	EOF
+	test_cmp expect .git/config &&
+
+	cp initial .git/config &&
+	test_must_fail git config --unset literal.test "$GLOB" &&
+	git config --literal-value --unset literal.test "$GLOB" &&
+	test_must_fail git config literal.test &&
+
+	cp initial .git/config &&
+	test_must_fail git config --unset-all literal.test "$GLOB" &&
+	git config --literal-value --unset-all literal.test "$GLOB" &&
+	test_must_fail git config literal.test &&
+
+	cp initial .git/config &&
+	git config --replace-all literal.test bogus "$GLOB" &&
+	q_to_tab >expect <<-EOF &&
+	[literal]
+	Qtest = $GLOB
+	Qtest = bogus
+	EOF
+	test_cmp expect .git/config &&
+
+	cp initial .git/config &&
+	git config --replace-all literal.test bogus "$GLOB" &&
+	git config --literal-value --replace-all literal.test bogus "$GLOB" &&
+	test_cmp_config bogus literal.test
+'
+
 test_done

-- 
gitgitgadget
Previous: Derrick Stolee via GitGitGadgetNext: Junio C Hamano
Message 13 of 72 in “config: add --literal-value option”
  1. 0/7 config: add --literal-value optionDerrick Stolee via GitGitGadget, Nov 19, 2020
  2. 1/7 t1300: test "set all" mode with value_regexDerrick Stolee via GitGitGadget, Nov 19, 2020
  3. Junio C HamanoNov 19, 2020
  4. brian m. carlsonNov 20, 2020
  5. Junio C HamanoNov 20, 2020
  6. Jeff KingNov 20, 2020
  7. Junio C HamanoNov 20, 2020
  8. brian m. carlsonNov 21, 2020
  9. Junio C HamanoNov 22, 2020
  10. Jeff KingNov 24, 2020
  11. Junio C HamanoNov 24, 2020
  12. 2/7 t1300: add test for --replace-all with value_regexDerrick Stolee via GitGitGadget, Nov 19, 2020
  13. 5/7 config: plumb --literal-value into config APIDerrick Stolee via GitGitGadget, Nov 19, 2020
  14. Junio C HamanoNov 19, 2020
  15. 4/7 config: add --literal-value option, un-implementedDerrick Stolee via GitGitGadget, Nov 19, 2020
  16. Junio C HamanoNov 19, 2020
  17. Martin ÅgrenNov 20, 2020
  18. 3/7 config: convert multi_replace to flagsDerrick Stolee via GitGitGadget, Nov 19, 2020
  19. Junio C HamanoNov 19, 2020
  20. 7/7 maintenance: use 'git config --literal-value'Derrick Stolee via GitGitGadget, Nov 19, 2020
  21. Junio C HamanoNov 19, 2020
  22. 6/7 config: implement --literal-value with --get*Derrick Stolee via GitGitGadget, Nov 19, 2020
  23. Ævar Arnfjörð BjarmasonNov 20, 2020
  24. Derrick StoleeNov 20, 2020
  25. Junio C HamanoNov 20, 2020
  26. Derrick StoleeNov 20, 2020
  27. Junio C HamanoNov 20, 2020
  28. Ævar Arnfjörð BjarmasonNov 24, 2020
  29. 0/7 config: add --fixed-value optionDerrick Stolee via GitGitGadget, Nov 23, 2020
  30. 1/7 t1300: test "set all" mode with value_regexDerrick Stolee via GitGitGadget, Nov 23, 2020
  31. Emily ShafferNov 23, 2020
  32. 2/7 t1300: add test for --replace-all with value_regexDerrick Stolee via GitGitGadget, Nov 23, 2020
  33. Emily ShafferNov 23, 2020
  34. 4/7 config: add --fixed-value option, un-implementedDerrick Stolee via GitGitGadget, Nov 23, 2020
  35. Junio C HamanoNov 23, 2020
  36. Emily ShafferNov 23, 2020
  37. Junio C HamanoNov 23, 2020
  38. Derrick StoleeNov 25, 2020
  39. Derrick StoleeNov 25, 2020
  40. Eric SunshineNov 25, 2020
  41. Junio C HamanoNov 25, 2020
  42. Junio C HamanoNov 25, 2020
  43. 3/7 config: convert multi_replace to flagsDerrick Stolee via GitGitGadget, Nov 23, 2020
  44. Emily ShafferNov 23, 2020
  45. 5/7 config: plumb --fixed-value into config APIDerrick Stolee via GitGitGadget, Nov 23, 2020
  46. Emily ShafferNov 23, 2020
  47. Eric SunshineNov 24, 2020
  48. Derrick StoleeNov 25, 2020
  49. Eric SunshineNov 25, 2020
  50. 6/7 config: implement --fixed-value with --get*Derrick Stolee via GitGitGadget, Nov 23, 2020
  51. Junio C HamanoNov 23, 2020
  52. Emily ShafferNov 23, 2020
  53. 7/7 maintenance: use 'git config --fixed-value'Derrick Stolee via GitGitGadget, Nov 23, 2020
  54. Junio C HamanoNov 23, 2020
  55. Emily ShafferNov 23, 2020
  56. Junio C HamanoNov 23, 2020
  57. Junio C HamanoNov 23, 2020
  58. 0/8 config: add --fixed-value optionDerrick Stolee via GitGitGadget, Nov 25, 2020
  59. 3/8 t1300: test "set all" mode with value-patternDerrick Stolee via GitGitGadget, Nov 25, 2020
  60. 4/8 t1300: add test for --replace-all with value-patternDerrick Stolee via GitGitGadget, Nov 25, 2020
  61. 6/8 config: plumb --fixed-value into config APIDerrick Stolee via GitGitGadget, Nov 25, 2020
  62. 8/8 maintenance: use 'git config --fixed-value'Derrick Stolee via GitGitGadget, Nov 25, 2020
  63. Junio C HamanoNov 25, 2020
  64. 5/8 config: add --fixed-value option, un-implementedDerrick Stolee via GitGitGadget, Nov 25, 2020
  65. Eric SunshineNov 25, 2020
  66. 2/8 config: replace 'value_regex' with 'value_pattern'Derrick Stolee via GitGitGadget, Nov 25, 2020
  67. Eric SunshineNov 25, 2020
  68. 1/8 config: convert multi_replace to flagsDerrick Stolee via GitGitGadget, Nov 25, 2020
  69. 7/8 config: implement --fixed-value with --get*Derrick Stolee via GitGitGadget, Nov 25, 2020
  70. Junio C HamanoNov 25, 2020
  71. Derrick StoleeNov 26, 2020
  72. Junio C HamanoDec 1, 2020

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