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[PATCH v3 6/8] config: plumb --fixed-value into config API

From
Derrick Stolee via GitGitGadget <gitgitgadget@gmail.com>
Date
Nov 25, 2020, 22:12 UTC
Message-ID
<763401da97289ea00eed372c6ed40ad508781681.1606342377.git.gitgitgadget@gmail.com>
In-Reply-To
<pull.796.v3.git.1606342376.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 --fixed-value option from 'git config'. This alters the purpose of the value_pattern 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_FIXED_VALUE flag is initialized in builtin/config.c based on the --fixed-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 | 50 +++++++++++++++++++++++++++++++++++++++++++++++
 4 files changed, 73 insertions(+), 5 deletions(-)
diff --git a/builtin/config.c b/builtin/config.c
index d0adbed872..8049d8f5fc 100644
--- a/builtin/config.c
+++ b/builtin/config.c
@@ -616,6 +616,7 @@ 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));
 
@@ -779,6 +780,8 @@ int cmd_config(int argc, const char **argv, const char *prefix)
 			error(_("--fixed-value only applies with 'value-pattern'"));
 			usage_builtin_config();
 		}
+
+		flags |= CONFIG_FLAGS_FIXED_VALUE;
 	}
 
 	if (actions & PAGING_ACTIONS)
@@ -842,7 +845,8 @@ 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();
@@ -851,7 +855,8 @@ 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();
@@ -860,7 +865,7 @@ 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);
@@ -887,7 +892,8 @@ 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);
@@ -897,7 +903,7 @@ 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 ac6aace166..d827167d83 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 *fixed_value;
 	regex_t *value_pattern;
 	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->fixed_value)
+		return !strcmp(store->fixed_value, value);
 	if (!store->value_pattern)
 		return 1; /* always matches */
 	if (store->value_pattern == CONFIG_REGEX_NONE)
@@ -2803,6 +2806,8 @@ int git_config_set_multivar_in_file_gently(const char *config_filename,
 			store.value_pattern = NULL;
 		else if (value_pattern == CONFIG_REGEX_NONE)
 			store.value_pattern = CONFIG_REGEX_NONE;
+		else if (flags & CONFIG_FLAGS_FIXED_VALUE)
+			store.fixed_value = value_pattern;
 		else {
 			if (value_pattern[0] == '!') {
 				store.do_not_match = 1;
diff --git a/config.h b/config.h
index 8ad1085b74..34901e2b64 100644
--- a/config.h
+++ b/config.h
@@ -269,6 +269,13 @@ int git_config_key_is_valid(const char *key);
  */
 #define CONFIG_FLAGS_MULTI_REPLACE (1 << 0)
 
+/*
+ * When CONFIG_FLAGS_FIXED_VALUE is specified, match key/value pairs
+ * by string comparison (not regex match) to the provided value_pattern
+ * parameter.
+ */
+#define CONFIG_FLAGS_FIXED_VALUE (1 << 1)
+
 int git_config_set_multivar_gently(const char *, const char *, const char *, unsigned);
 void git_config_set_multivar(const char *, const char *, const char *, unsigned);
 int git_config_set_multivar_in_file_gently(const char *, const char *, const char *, const char *, unsigned);
diff --git a/t/t1300-config.sh b/t/t1300-config.sh
index f6f071006d..413fcbba03 100755
--- a/t/t1300-config.sh
+++ b/t/t1300-config.sh
@@ -1991,4 +1991,54 @@ test_expect_success 'refuse --fixed-value for incompatible actions' '
 	test_must_fail git config --file=config --fixed-value --unset-all dev.null
 '
 
+test_expect_success '--fixed-value uses exact string matching' '
+	test_when_finished rm -f config initial &&
+	META="a+b*c?d[e]f.g" &&
+	git config --file=initial fixed.test "$META" &&
+
+	cp initial config &&
+	git config --file=config fixed.test bogus "$META" &&
+	git config --file=config --list >actual &&
+	cat >expect <<-EOF &&
+	fixed.test=$META
+	fixed.test=bogus
+	EOF
+	test_cmp expect actual &&
+
+	cp initial config &&
+	git config --file=config --fixed-value fixed.test bogus "$META" &&
+	git config --file=config --list >actual &&
+	cat >expect <<-\EOF &&
+	fixed.test=bogus
+	EOF
+	test_cmp expect actual &&
+
+	cp initial config &&
+	test_must_fail git config --file=config --unset fixed.test "$META" &&
+	git config --file=config --fixed-value --unset fixed.test "$META" &&
+	test_must_fail git config --file=config fixed.test &&
+
+	cp initial config &&
+	test_must_fail git config --file=config --unset-all fixed.test "$META" &&
+	git config --file=config --fixed-value --unset-all fixed.test "$META" &&
+	test_must_fail git config --file=config fixed.test &&
+
+	cp initial config &&
+	git config --file=config --replace-all fixed.test bogus "$META" &&
+	git config --file=config --list >actual &&
+	cat >expect <<-EOF &&
+	fixed.test=$META
+	fixed.test=bogus
+	EOF
+	test_cmp expect actual &&
+
+	git config --file=config --fixed-value --replace-all fixed.test bogus "$META" &&
+	git config --file=config --list >actual &&
+	cat >expect <<-EOF &&
+	fixed.test=bogus
+	fixed.test=bogus
+	EOF
+	test_cmp expect actual
+'
+
 test_done

-- 
gitgitgadget
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Message 61 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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