travis-ci: set GIT_TEST_HTTPD in 'ci/lib-travisci.sh'

Commit 657343a60 (travis-ci: move Travis CI code into dedicated
scripts, 2017-09-10) converted '.travis.yml's default 'before_install'
scriptlet to the 'ci/install-dependencies.sh' script, and while doing
so moved setting GIT_TEST_HTTPD=YesPlease for the 64-bit GCC and Clang
Linux build jobs to that script.  This is wrong for two reasons:

- The purpose of that script is, as its name suggests, to install
dependencies, not to set any environment variables influencing
which tests should be run (though, arguably, this was already an
issue with the original 'before_install' scriptlet).

- Setting the variable has no effect anymore, because that script is
run in a separate shell process, and the variable won't be visible
in any of the other scripts, notably in 'ci/run-tests.sh'
responsible for, well, running the tests.

Luckily, this didn't have a negative effect on our Travis CI build
jobs, because GIT_TEST_HTTPD is a tri-state variable defaulting to
"auto" and a functioning web server was installed in those Linux build
jobs, so the httpd tests were run anyway.

Apparently the httpd tests run just fine without GIT_TEST_HTTPD being
set, therefore we could simply remove this environment variable.
However, if a bug were to creep in to change the Travis CI build
environment to run the tests as root or to not install Apache, then
the httpd tests would be skipped and the build job would still
succeed.  We would only notice if someone actually were to look
through the build job's trace log; but who would look at the trace log
of a successful build job?!

Since httpd tests are important, we do want to run them and we want to
be loudly reminded if they can't be run.  Therefore, move setting
GIT_TEST_HTTPD=YesPlease for the 64-bit GCC and Clang Linux build jobs
to 'ci/lib-travisci.sh' to ensure that the build job fails when the
httpd tests can't be run.  (We could set it in 'ci/run-tests.sh' just
as well, but it's better to keep all environment variables in one
place in 'ci/lib-travisci.sh'.)

Signed-off-by: SZEDER Gábor <szeder.dev@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

diff --git a/ci/install-dependencies.sh b/ci/install-dependencies.sh
index 468788566432d8dd350c66436d34dacc21e22a7f..75a9fd2475168fce9e229ce44db2808227700e17 100755 (executable)
--- a/ci/install-dependencies.sh
+++ b/ci/install-dependencies.sh
@@ -10,8 +10,6 @@ LFSWHENCE=https://github.com/github/git-lfs/releases/download/v$LINUX_GIT_LFS_VE
 
 case "$jobname" in
 linux-clang|linux-gcc)
-       export GIT_TEST_HTTPD=YesPlease
-
        mkdir --parents "$P4_PATH"
        pushd "$P4_PATH"
                wget --quiet "$P4WHENCE/bin.linux26x86_64/p4d"

diff --git a/ci/lib-travisci.sh b/ci/lib-travisci.sh
index 8e75982a916ad1352df35eeadcbb7b9272d0f3f6..0e1c38491cac0eb321d8747d91fafcff197b86d1 100755 (executable)
--- a/ci/lib-travisci.sh
+++ b/ci/lib-travisci.sh
@@ -40,6 +40,8 @@ export GIT_TEST_CLONE_2GB=YesPlease
 
 case "$jobname" in
 linux-clang|linux-gcc)
+       export GIT_TEST_HTTPD=YesPlease
+
        # The Linux build installs the defined dependency versions below.
        # The OS X build installs the latest available versions. Keep that
        # in mind when you encounter a broken OS X build!