Re: [PATCH 2/2] add -i: default to the built-in implementation

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Hi Dscho

On 30/11/2021 14:14, Johannes Schindelin via GitGitGadget wrote:
From: Johannes Schindelin <johannes.schindelin@xxxxxx>

In 9a5315edfdf (Merge branch 'js/patch-mode-in-others-in-c',
2020-02-05), Git acquired a built-in implementation of `git add`'s
interactive mode that could be turned on via the config option
`add.interactive.useBuiltin`.

The first official Git version to support this knob was v2.26.0.

In 2df2d81ddd0 (add -i: use the built-in version when
feature.experimental is set, 2020-09-08), this built-in implementation
was also enabled via `feature.experimental`. The first version with this
change was v2.29.0.

More than a year (and very few bug reports) later, it is time to declare
the built-in implementation mature and to turn it on by default.

We specifically leave the `add.interactive.useBuiltin` configuration in
place, to give users an "escape hatch" in the unexpected case should
they encounter a previously undetected bug in that implementation.

Thanks for doing this, I agree it is time to switch over - it feels like it is quite a while since anyone reported a bug with the C version. Both patches look good to me. I've left one minor comment below but it is not worth re-rolling just for that. Thanks Slavica for your work on this, it's great to have it converted to C.


Signed-off-by: Johannes Schindelin <johannes.schindelin@xxxxxx>
---
  Documentation/config/add.txt |  6 +++---
  builtin/add.c                | 15 +++++----------
  ci/run-build-and-tests.sh    |  2 +-
  t/README                     |  2 +-
  t/t2016-checkout-patch.sh    |  2 +-
  5 files changed, 11 insertions(+), 16 deletions(-)

diff --git a/Documentation/config/add.txt b/Documentation/config/add.txt
index c9f748f81cb..3e859f34197 100644
--- a/Documentation/config/add.txt
+++ b/Documentation/config/add.txt
@@ -7,6 +7,6 @@ add.ignore-errors (deprecated)::
  	variables.
add.interactive.useBuiltin::
-	[EXPERIMENTAL] Set to `true` to use the experimental built-in
-	implementation of the interactive version of linkgit:git-add[1]
-	instead of the Perl script version. Is `false` by default.
+	Set to `false` to fall back to the original Perl implementation of
+	the interactive version of linkgit:git-add[1] instead of the built-in
+	version. Is `true` by default.
diff --git a/builtin/add.c b/builtin/add.c
index ef6b619c45e..8ef230a345b 100644
--- a/builtin/add.c
+++ b/builtin/add.c
@@ -237,17 +237,12 @@ int run_add_interactive(const char *revision, const char *patch_mode,
  	int use_builtin_add_i =
  		git_env_bool("GIT_TEST_ADD_I_USE_BUILTIN", -1);
- if (use_builtin_add_i < 0) {
-		int experimental;
-		if (!git_config_get_bool("add.interactive.usebuiltin",
-					 &use_builtin_add_i))
-			; /* ok */
-		else if (!git_config_get_bool("feature.experimental", &experimental) &&
-			 experimental)
-			use_builtin_add_i = 1;
-	}
+	if (use_builtin_add_i < 0 &&
+	    git_config_get_bool("add.interactive.usebuiltin",
+				&use_builtin_add_i))
+		use_builtin_add_i = 1;
- if (use_builtin_add_i == 1) {
+	if (use_builtin_add_i != 0) {

This could be simplified to "if (use_builtin_add_i)" but don't re-roll just for that

Best Wishes

Phillip

  		enum add_p_mode mode;
if (!patch_mode)
diff --git a/ci/run-build-and-tests.sh b/ci/run-build-and-tests.sh
index cc62616d806..660ebe8d108 100755
--- a/ci/run-build-and-tests.sh
+++ b/ci/run-build-and-tests.sh
@@ -29,7 +29,7 @@ linux-gcc)
  	export GIT_TEST_COMMIT_GRAPH_CHANGED_PATHS=1
  	export GIT_TEST_MULTI_PACK_INDEX=1
  	export GIT_TEST_MULTI_PACK_INDEX_WRITE_BITMAP=1
-	export GIT_TEST_ADD_I_USE_BUILTIN=1
+	export GIT_TEST_ADD_I_USE_BUILTIN=0
  	export GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME=master
  	export GIT_TEST_WRITE_REV_INDEX=1
  	export GIT_TEST_CHECKOUT_WORKERS=2
diff --git a/t/README b/t/README
index 29f72354bf1..2c22337d6e7 100644
--- a/t/README
+++ b/t/README
@@ -419,7 +419,7 @@ the --sparse command-line argument.
  GIT_TEST_PRELOAD_INDEX=<boolean> exercises the preload-index code path
  by overriding the minimum number of cache entries required per thread.
-GIT_TEST_ADD_I_USE_BUILTIN=<boolean>, when true, enables the
+GIT_TEST_ADD_I_USE_BUILTIN=<boolean>, when false, disables the
  built-in version of git add -i. See 'add.interactive.useBuiltin' in
  git-config(1).
diff --git a/t/t2016-checkout-patch.sh b/t/t2016-checkout-patch.sh
index 71c5a15be00..bc3f69b4b1d 100755
--- a/t/t2016-checkout-patch.sh
+++ b/t/t2016-checkout-patch.sh
@@ -4,7 +4,7 @@ test_description='git checkout --patch'
. ./lib-patch-mode.sh -if ! test_bool_env GIT_TEST_ADD_I_USE_BUILTIN false && ! test_have_prereq PERL
+if ! test_bool_env GIT_TEST_ADD_I_USE_BUILTIN true && ! test_have_prereq PERL
  then
  	skip_all='skipping interactive add tests, PERL not set'
  	test_done





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