CI: remove Travis CI support

Remove support for running the CI in travis. The last builds in it are
from 5 months ago[1] (as of 2021-11-19), and our documentation has
referred to GitHub CI instead since f003a91f5c5 (SubmittingPatches:
replace discussion of Travis with GitHub Actions, 2021-07-22).

We'll now run the "t9810 t9816" and tests on OSX. We didn't before, as
we'd carried the Travis exclusion of them forward from
522354d70f4 (Add Travis CI support, 2015-11-27). Let's hope whatever
issue there was with them was either Travis specific, or fixed since
then (I'm not sure).

The "apt-add-repository" invocation (which we were doing in GitHub CI)
isn't needed, it was another Travis-only case that was carried forward
into more general code. See 0f0c51181df (travis-ci: install packages
in 'ci/install-dependencies.sh', 2018-11-01).

Remove the "linux-gcc-4.8" job added in fb9d7431cf4 (travis-ci: build
with GCC 4.8 as well, 2019-07-18), it only ran in Travis CI.

1. https://travis-ci.org/github/git/git/builds

Signed-off-by: Ævar Arnfjörð Bjarmason <avarab@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

1 files changed, 3 insertions, 34 deletions

diff --git a/ci/lib.sh b/ci/lib.sh
index 82cb17f8ee..73d959e87f 100755
--- a/ci/lib.sh
+++ b/ci/lib.sh
@@ -34,7 +34,7 @@ save_good_tree () {
 # successfully before (e.g. because the branch got rebased, changing only
 # the commit messages).
 skip_good_tree () {
-	if test "$TRAVIS_DEBUG_MODE" = true || test true = "$GITHUB_ACTIONS"
+	if test true = "$GITHUB_ACTIONS"
 	then
 		return
 	fi
@@ -60,7 +60,7 @@ skip_good_tree () {
 			cat <<-EOF
 			$(tput setaf 2)Skipping build job for commit $CI_COMMIT.$(tput sgr0)
 			This commit's tree has already been built and tested successfully in build job $prev_good_job_number for commit $prev_good_commit.
-			The log of that build job is available at $(url_for_job_id $prev_good_job_id)
+			The log of that build job is available at $SYSTEM_TASKDEFINITIONSURI$SYSTEM_TEAMPROJECT/_build/results?buildId=$prev_good_job_id
 			To force a re-build delete the branch's cache and then hit 'Restart job'.
 			EOF
 		fi
@@ -91,29 +91,7 @@ export MAKEFLAGS=
 # and installing dependencies.
 set -ex
 
-if test true = "$TRAVIS"
-then
-	CI_TYPE=travis
-	# When building a PR, TRAVIS_BRANCH refers to the *target* branch. Not
-	# what we want here. We want the source branch instead.
-	CI_BRANCH="${TRAVIS_PULL_REQUEST_BRANCH:-$TRAVIS_BRANCH}"
-	CI_COMMIT="$TRAVIS_COMMIT"
-	CI_JOB_ID="$TRAVIS_JOB_ID"
-	CI_JOB_NUMBER="$TRAVIS_JOB_NUMBER"
-	CI_OS_NAME="$TRAVIS_OS_NAME"
-	CI_REPO_SLUG="$TRAVIS_REPO_SLUG"
-
-	cache_dir="$HOME/travis-cache"
-
-	url_for_job_id () {
-		echo "https://travis-ci.org/$CI_REPO_SLUG/jobs/$1"
-	}
-
-	BREW_INSTALL_PACKAGES="git-lfs gettext"
-	export GIT_PROVE_OPTS="--timer --jobs 3 --state=failed,slow,save"
-	export GIT_TEST_OPTS="--verbose-log -x --immediate"
-	MAKEFLAGS="$MAKEFLAGS --jobs=2"
-elif test -n "$SYSTEM_COLLECTIONURI" || test -n "$SYSTEM_TASKDEFINITIONSURI"
+if test -n "$SYSTEM_COLLECTIONURI" || test -n "$SYSTEM_TASKDEFINITIONSURI"
 then
 	CI_TYPE=azure-pipelines
 	# We are running in Azure Pipelines
@@ -130,10 +108,6 @@ then
 	# among *all* phases)
 	cache_dir="$HOME/test-cache/$SYSTEM_PHASENAME"
 
-	url_for_job_id () {
-		echo "$SYSTEM_TASKDEFINITIONSURI$SYSTEM_TEAMPROJECT/_build/results?buildId=$1"
-	}
-
 	export GIT_PROVE_OPTS="--timer --jobs 10 --state=failed,slow,save"
 	export GIT_TEST_OPTS="--verbose-log -x --write-junit-xml"
 	MAKEFLAGS="$MAKEFLAGS --jobs=10"
@@ -214,11 +188,6 @@ osx-clang|osx-gcc)
 	else
 		MAKEFLAGS="$MAKEFLAGS PYTHON_PATH=$(which python2)"
 	fi
-
-	# t9810 occasionally fails on Travis CI OS X
-	# t9816 occasionally fails with "TAP out of sequence errors" on
-	# Travis CI OS X
-	export GIT_SKIP_TESTS="t9810 t9816"
 	;;
 linux-gcc-default)
 	;;