git-commit-vandalism/ci/install-dependencies.sh
SZEDER Gábor f2f4715033 ci: don't update Homebrew
Lately our GCC macOS build job on Travis CI has been erroring out
while installing dependencies with:

  +brew link gcc@8
  Error: No such keg: /usr/local/Cellar/gcc@8
  The command "ci/install-dependencies.sh" failed and exited with 1 during .

Now, while gcc@8 is still pre-installed (but not linked) and would be
perfectly usable in the Travis CI macOS image we use [1], it's at
version 8.2.  However, when installing dependencies we first
explicitly run 'brew update', which spends over two minutes to update
itself and information about the available packages, and it learns
about GCC 8.3.  After that point gcc@8 exclusively refers to v8.3,
and, unfortunately, 'brew' is just too dumb to be able to do anything
with the still installed 8.2 package, and the subsequent 'brew link
gcc@8' fails.  (Even 'brew uninstall gcc@8' fails with the same
error!)

Don't run 'brew update' to keep the already installed GCC 8.2 'brew
link'-able.  Note that in addition we have to 'export
HOMEBREW_NO_AUTO_UPDATE=1' first, because 'brew' is so very helpful
that it would implicitly run update for us on the next 'brew install
<pkg>' otherwise.

Disabling 'brew update' has additional benefits:

  - It shaves off 2-3mins from the ~4mins currently spent on
    installing dependencies, and the macOS build jobs have always been
    prone to exceeding the time limit on Travis CI.

  - Our builds won't suddenly break because of the occasional Homebrew
    breakages [2].

The drawback is that we'll be stuck with slightly older versions of
the packages that we install via Homebrew (Git-LFS 2.5.2 and Perforce
2018.1; they are currently at 2.7.2 and 2019.1, respectively).  We
might want to reconsider this decision as time goes on and/or switch
to a more recent macOS image as they become available.

[1] 2000ac9fbf (travis-ci: switch to Xcode 10.1 macOS image,
    2019-01-17)

[2] See e.g. a1ccaedd62 (travis-ci: make the OSX build jobs' 'brew
    update' more quiet, 2019-02-02) or

    https://public-inbox.org/git/20180907032002.23366-1-szeder.dev@gmail.com/T/#+u

Signed-off-by: SZEDER Gábor <szeder.dev@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2019-07-03 09:53:45 -07:00

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Bash
Executable File

#!/usr/bin/env bash
#
# Install dependencies required to build and test Git on Linux and macOS
#
. ${0%/*}/lib.sh
P4WHENCE=http://filehost.perforce.com/perforce/r$LINUX_P4_VERSION
LFSWHENCE=https://github.com/github/git-lfs/releases/download/v$LINUX_GIT_LFS_VERSION
case "$jobname" in
linux-clang|linux-gcc)
sudo apt-add-repository -y "ppa:ubuntu-toolchain-r/test"
sudo apt-get -q update
sudo apt-get -q -y install language-pack-is libsvn-perl apache2
case "$jobname" in
linux-gcc)
sudo apt-get -q -y install gcc-8
;;
esac
mkdir --parents "$P4_PATH"
pushd "$P4_PATH"
wget --quiet "$P4WHENCE/bin.linux26x86_64/p4d"
wget --quiet "$P4WHENCE/bin.linux26x86_64/p4"
chmod u+x p4d
chmod u+x p4
popd
mkdir --parents "$GIT_LFS_PATH"
pushd "$GIT_LFS_PATH"
wget --quiet "$LFSWHENCE/git-lfs-linux-amd64-$LINUX_GIT_LFS_VERSION.tar.gz"
tar --extract --gunzip --file "git-lfs-linux-amd64-$LINUX_GIT_LFS_VERSION.tar.gz"
cp git-lfs-$LINUX_GIT_LFS_VERSION/git-lfs .
popd
;;
osx-clang|osx-gcc)
export HOMEBREW_NO_AUTO_UPDATE=1
# Uncomment this if you want to run perf tests:
# brew install gnu-time
test -z "$BREW_INSTALL_PACKAGES" ||
brew install $BREW_INSTALL_PACKAGES
brew link --force gettext
brew install caskroom/cask/perforce
case "$jobname" in
osx-gcc)
brew link gcc@8
;;
esac
;;
StaticAnalysis)
sudo apt-get -q update
sudo apt-get -q -y install coccinelle
;;
Documentation)
sudo apt-get -q update
sudo apt-get -q -y install asciidoc xmlto
test -n "$ALREADY_HAVE_ASCIIDOCTOR" ||
gem install --version 1.5.8 asciidoctor
;;
esac
if type p4d >/dev/null && type p4 >/dev/null
then
echo "$(tput setaf 6)Perforce Server Version$(tput sgr0)"
p4d -V | grep Rev.
echo "$(tput setaf 6)Perforce Client Version$(tput sgr0)"
p4 -V | grep Rev.
fi
if type git-lfs >/dev/null
then
echo "$(tput setaf 6)Git-LFS Version$(tput sgr0)"
git-lfs version
fi