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[PATCH v2 14/18] parse_branchname_arg(): introduce expect_commit_only

From
AGAlexandr Miloslavskiy via GitGitGadget <gitgitgadget@gmail.com>
Date
Dec 16, 2019, 15:48 UTC
Message-ID
<2350dc282e15f42afaf582cbf1551d72aa17da05.1576511287.git.gitgitgadget@gmail.com>
In-Reply-To
<pull.490.v2.git.1576511287.gitgitgadget@gmail.com>
From: Alexandr Miloslavskiy <alexandr.miloslavskiy@syntevo.com>

`has_dash_dash` unexpectedly takes `opts->accept_pathspec` into account. While this may sound clever at first sight, it becomes pretty hard to reason (and not be a victim) about code, especially in combination with `argc` here:

	if (!(argc == 1 && !has_dash_dash) &&
	    !(argc == 2 && has_dash_dash) &&
	    opts->accept_pathspec)
		recover_with_dwim = 0;

Introduce a new non-obfuscated variable to reduce the amount of diffs in next patch.

This should not change behavior in any way.
Signed-off-by: Alexandr Miloslavskiy <alexandr.miloslavskiy@syntevo.com>
---
 builtin/checkout.c | 15 +++++++++------
 1 file changed, 9 insertions(+), 6 deletions(-)
diff --git a/builtin/checkout.c b/builtin/checkout.c
index f35fe2cc26..bd0efa9140 100644
--- a/builtin/checkout.c
+++ b/builtin/checkout.c
@@ -1154,7 +1154,7 @@ static int parse_branchname_arg(int argc, const char **argv,
 	const char **new_branch = &opts->new_branch;
 	const char *arg;
 	int dash_dash_pos;
-	int has_dash_dash = 0;
+	int has_dash_dash = 0, expect_commit_only = 0;
 	int i;
 
 	/*
@@ -1225,7 +1225,10 @@ static int parse_branchname_arg(int argc, const char **argv,
 		    die(_("only one reference expected, %d given."), dash_dash_pos);
 	}
 
-	opts->count_checkout_paths = !opts->quiet && !has_dash_dash;
+	if (has_dash_dash)
+	    expect_commit_only = 1;
+
+	opts->count_checkout_paths = !opts->quiet && !expect_commit_only;
 
 	if (!strcmp(arg, "-"))
 		arg = "@{-1}";
@@ -1241,10 +1244,10 @@ static int parse_branchname_arg(int argc, const char **argv,
 		 */
 		int recover_with_dwim = dwim_new_local_branch_ok;
 
-		int could_be_checkout_paths = !has_dash_dash &&
+		int could_be_checkout_paths = !expect_commit_only &&
 			check_filename(opts->prefix, arg);
 
-		if (!has_dash_dash && !no_wildcard(arg))
+		if (!expect_commit_only && !no_wildcard(arg))
 			recover_with_dwim = 0;
 
 		/*
@@ -1269,7 +1272,7 @@ static int parse_branchname_arg(int argc, const char **argv,
 		}
 
 		if (!recover_with_dwim) {
-			if (has_dash_dash)
+			if (expect_commit_only)
 				die(_("invalid reference: %s"), arg);
 			return 0;
 		}
@@ -1280,7 +1283,7 @@ static int parse_branchname_arg(int argc, const char **argv,
 	if (!opts->source_tree)                   /* case (1): want a tree */
 		die(_("reference is not a tree: %s"), arg);
 
-	if (!has_dash_dash) {	/* case (3).(d) -> (1) */
+	if (!expect_commit_only) {	/* case (3).(d) -> (1) */
 		/*
 		 * Do not complain the most common case
 		 *	git checkout branch
-- 
gitgitgadget
Previous: Alexandr Miloslavskiy via GitGitGadgetNext: Alexandr Miloslavskiy via GitGitGadget
Message 39 of 67 in “Extend --pathspec-from-file to git add, checkout”
  1. 00/16 Extend --pathspec-from-file to git add, checkoutAlexandr Miloslavskiy via GitGitGadget, Dec 12, 2019
  2. 02/16 commit: forbid --pathspec-from-file --allAlexandr Miloslavskiy via GitGitGadget, Dec 12, 2019
  3. Phillip WoodDec 16, 2019
  4. Alexandr MiloslavskiyDec 16, 2019
  5. 01/16 t7107, t7526: directly test parse_pathspec_file()Alexandr Miloslavskiy via GitGitGadget, Dec 12, 2019
  6. 06/16 doc: checkout: fix broken text referenceAlexandr Miloslavskiy via GitGitGadget, Dec 12, 2019
  7. 03/16 cmd_add: prepare for next patchAlexandr Miloslavskiy via GitGitGadget, Dec 12, 2019
  8. 11/16 parse_branchname_arg(): easier to understand variablesAlexandr Miloslavskiy via GitGitGadget, Dec 12, 2019
  9. 08/16 doc: restore: synchronize <pathspec> descriptionAlexandr Miloslavskiy via GitGitGadget, Dec 12, 2019
  10. 10/16 checkout: die() on ambiguous tracking branchesAlexandr Miloslavskiy via GitGitGadget, Dec 12, 2019
  11. 14/16 parse_branchname_arg(): refactor the decision makingAlexandr Miloslavskiy via GitGitGadget, Dec 12, 2019
  12. 15/16 t2024: cover more casesAlexandr Miloslavskiy via GitGitGadget, Dec 12, 2019
  13. 13/16 parse_branchname_arg(): update code commentsAlexandr Miloslavskiy via GitGitGadget, Dec 12, 2019
  14. 09/16 parse_branchname_arg(): extract part as new functionAlexandr Miloslavskiy via GitGitGadget, Dec 12, 2019
  15. 16/16 checkout, restore: support the --pathspec-from-file optionAlexandr Miloslavskiy via GitGitGadget, Dec 12, 2019
  16. 12/16 parse_branchname_arg(): introduce expect_commit_onlyAlexandr Miloslavskiy via GitGitGadget, Dec 12, 2019
  17. 05/16 doc: checkout: remove duplicate synopsisAlexandr Miloslavskiy via GitGitGadget, Dec 12, 2019
  18. 04/16 add: support the --pathspec-from-file optionAlexandr Miloslavskiy via GitGitGadget, Dec 12, 2019
  19. 07/16 doc: checkout: synchronize <pathspec> descriptionAlexandr Miloslavskiy via GitGitGadget, Dec 12, 2019
  20. 00/18 Extend --pathspec-from-file to git add, checkoutAlexandr Miloslavskiy via GitGitGadget, Dec 16, 2019
  21. 02/18 t7526: add tests for error conditionsAlexandr Miloslavskiy via GitGitGadget, Dec 16, 2019
  22. Junio C HamanoDec 18, 2019
  23. Alexandr MiloslavskiyDec 19, 2019
  24. 04/18 commit: forbid --pathspec-from-file --allAlexandr Miloslavskiy via GitGitGadget, Dec 16, 2019
  25. Phillip WoodDec 17, 2019
  26. Junio C HamanoDec 18, 2019
  27. Junio C HamanoDec 18, 2019
  28. Junio C HamanoDec 18, 2019
  29. Alexandr MiloslavskiyDec 19, 2019
  30. 05/18 cmd_add: prepare for next patchAlexandr Miloslavskiy via GitGitGadget, Dec 16, 2019
  31. 06/18 add: support the --pathspec-from-file optionAlexandr Miloslavskiy via GitGitGadget, Dec 16, 2019
  32. 01/18 t7107, t7526: directly test parse_pathspec_file()Alexandr Miloslavskiy via GitGitGadget, Dec 16, 2019
  33. Junio C HamanoDec 18, 2019
  34. Junio C HamanoDec 19, 2019
  35. Alexandr MiloslavskiyDec 19, 2019
  36. 09/18 doc: checkout: synchronize <pathspec> descriptionAlexandr Miloslavskiy via GitGitGadget, Dec 16, 2019
  37. 08/18 doc: checkout: fix broken text referenceAlexandr Miloslavskiy via GitGitGadget, Dec 16, 2019
  38. 13/18 parse_branchname_arg(): easier to understand variablesAlexandr Miloslavskiy via GitGitGadget, Dec 16, 2019
  39. 14/18 parse_branchname_arg(): introduce expect_commit_onlyAlexandr Miloslavskiy via GitGitGadget, Dec 16, 2019
  40. 17/18 t2024: cover more casesAlexandr Miloslavskiy via GitGitGadget, Dec 16, 2019
  41. 15/18 parse_branchname_arg(): update code commentsAlexandr Miloslavskiy via GitGitGadget, Dec 16, 2019
  42. 18/18 checkout, restore: support the --pathspec-from-file optionAlexandr Miloslavskiy via GitGitGadget, Dec 16, 2019
  43. 12/18 checkout: die() on ambiguous tracking branchesAlexandr Miloslavskiy via GitGitGadget, Dec 16, 2019
  44. 10/18 doc: restore: synchronize <pathspec> descriptionAlexandr Miloslavskiy via GitGitGadget, Dec 16, 2019
  45. 11/18 parse_branchname_arg(): extract part as new functionAlexandr Miloslavskiy via GitGitGadget, Dec 16, 2019
  46. 07/18 doc: checkout: remove duplicate synopsisAlexandr Miloslavskiy via GitGitGadget, Dec 16, 2019
  47. 16/18 parse_branchname_arg(): refactor the decision makingAlexandr Miloslavskiy via GitGitGadget, Dec 16, 2019
  48. 03/18 t7107: add tests for error conditionsAlexandr Miloslavskiy via GitGitGadget, Dec 16, 2019
  49. 00/18 Extend --pathspec-from-file to git add, checkoutAlexandr Miloslavskiy via GitGitGadget, Dec 19, 2019
  50. 02/18 t7526: add tests for error conditionsAlexandr Miloslavskiy via GitGitGadget, Dec 19, 2019
  51. 01/18 t7107, t7526: directly test parse_pathspec_file()Alexandr Miloslavskiy via GitGitGadget, Dec 19, 2019
  52. 03/18 t7107: add tests for error conditionsAlexandr Miloslavskiy via GitGitGadget, Dec 19, 2019
  53. 04/18 commit: forbid --pathspec-from-file --allAlexandr Miloslavskiy via GitGitGadget, Dec 19, 2019
  54. 05/18 cmd_add: prepare for next patchAlexandr Miloslavskiy via GitGitGadget, Dec 19, 2019
  55. 07/18 doc: checkout: remove duplicate synopsisAlexandr Miloslavskiy via GitGitGadget, Dec 19, 2019
  56. 08/18 doc: checkout: fix broken text referenceAlexandr Miloslavskiy via GitGitGadget, Dec 19, 2019
  57. 09/18 doc: checkout: synchronize <pathspec> descriptionAlexandr Miloslavskiy via GitGitGadget, Dec 19, 2019
  58. 06/18 add: support the --pathspec-from-file optionAlexandr Miloslavskiy via GitGitGadget, Dec 19, 2019
  59. 11/18 parse_branchname_arg(): extract part as new functionAlexandr Miloslavskiy via GitGitGadget, Dec 19, 2019
  60. 10/18 doc: restore: synchronize <pathspec> descriptionAlexandr Miloslavskiy via GitGitGadget, Dec 19, 2019
  61. 13/18 parse_branchname_arg(): easier to understand variablesAlexandr Miloslavskiy via GitGitGadget, Dec 19, 2019
  62. 17/18 t2024: cover more casesAlexandr Miloslavskiy via GitGitGadget, Dec 19, 2019
  63. 16/18 parse_branchname_arg(): refactor the decision makingAlexandr Miloslavskiy via GitGitGadget, Dec 19, 2019
  64. 14/18 parse_branchname_arg(): simplify argument eatingAlexandr Miloslavskiy via GitGitGadget, Dec 19, 2019
  65. 12/18 checkout: die() on ambiguous tracking branchesAlexandr Miloslavskiy via GitGitGadget, Dec 19, 2019
  66. 18/18 checkout, restore: support the --pathspec-from-file optionAlexandr Miloslavskiy via GitGitGadget, Dec 19, 2019
  67. 15/18 parse_branchname_arg(): update code commentsAlexandr Miloslavskiy via GitGitGadget, Dec 19, 2019

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