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lix/tests/common/vars-and-functions.sh.in
John Ericson bfb9eb87fe Cleanup test skipping
- Try not to put cryptic "99" in many places

  Factor out `exit 99` into `skipTest` function

- Alows make sure skipping a test is done with a reason

  `skipTest` takes a mandatory argument

- Separate pure conditionals vs side-effectful test skipping.

  "require daemon" already had this, but "sandbox support" did not.
2023-03-16 18:43:03 -04:00

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set -eu -o pipefail
if [[ -z "${COMMON_VARS_AND_FUNCTIONS_SH_SOURCED-}" ]]; then
COMMON_VARS_AND_FUNCTIONS_SH_SOURCED=1
export PS4='+(${BASH_SOURCE[0]}:$LINENO) '
export TEST_ROOT=$(realpath ${TMPDIR:-/tmp}/nix-test)/${TEST_NAME:-default}
export NIX_STORE_DIR
if ! NIX_STORE_DIR=$(readlink -f $TEST_ROOT/store 2> /dev/null); then
# Maybe the build directory is symlinked.
export NIX_IGNORE_SYMLINK_STORE=1
NIX_STORE_DIR=$TEST_ROOT/store
fi
export NIX_LOCALSTATE_DIR=$TEST_ROOT/var
export NIX_LOG_DIR=$TEST_ROOT/var/log/nix
export NIX_STATE_DIR=$TEST_ROOT/var/nix
export NIX_CONF_DIR=$TEST_ROOT/etc
export NIX_DAEMON_SOCKET_PATH=$TEST_ROOT/dSocket
unset NIX_USER_CONF_FILES
export _NIX_TEST_SHARED=$TEST_ROOT/shared
if [[ -n $NIX_STORE ]]; then
export _NIX_TEST_NO_SANDBOX=1
fi
export _NIX_IN_TEST=$TEST_ROOT/shared
export _NIX_TEST_NO_LSOF=1
export NIX_REMOTE=${NIX_REMOTE_-}
unset NIX_PATH
export TEST_HOME=$TEST_ROOT/test-home
export HOME=$TEST_HOME
unset XDG_STATE_HOME
unset XDG_DATA_HOME
unset XDG_CONFIG_HOME
unset XDG_CONFIG_DIRS
unset XDG_CACHE_HOME
mkdir -p $TEST_HOME
export PATH=@bindir@:$PATH
if [[ -n "${NIX_CLIENT_PACKAGE:-}" ]]; then
export PATH="$NIX_CLIENT_PACKAGE/bin":$PATH
fi
DAEMON_PATH="$PATH"
if [[ -n "${NIX_DAEMON_PACKAGE:-}" ]]; then
DAEMON_PATH="${NIX_DAEMON_PACKAGE}/bin:$DAEMON_PATH"
fi
coreutils=@coreutils@
export dot=@dot@
export SHELL="@bash@"
export PAGER=cat
export busybox="@sandbox_shell@"
export version=@PACKAGE_VERSION@
export system=@system@
export BUILD_SHARED_LIBS=@BUILD_SHARED_LIBS@
export IMPURE_VAR1=foo
export IMPURE_VAR2=bar
cacheDir=$TEST_ROOT/binary-cache
readLink() {
ls -l "$1" | sed 's/.*->\ //'
}
clearProfiles() {
profiles="$HOME"/.local/state/nix/profiles
rm -rf "$profiles"
}
clearStore() {
echo "clearing store..."
chmod -R +w "$NIX_STORE_DIR"
rm -rf "$NIX_STORE_DIR"
mkdir "$NIX_STORE_DIR"
rm -rf "$NIX_STATE_DIR"
mkdir "$NIX_STATE_DIR"
clearProfiles
}
clearCache() {
rm -rf "$cacheDir"
}
clearCacheCache() {
rm -f $TEST_HOME/.cache/nix/binary-cache*
}
startDaemon() {
# Dont start the daemon twice, as this would just make it loop indefinitely
if [[ "${_NIX_TEST_DAEMON_PID-}" != '' ]]; then
return
fi
# Start the daemon, wait for the socket to appear.
rm -f $NIX_DAEMON_SOCKET_PATH
PATH=$DAEMON_PATH nix-daemon &
_NIX_TEST_DAEMON_PID=$!
export _NIX_TEST_DAEMON_PID
for ((i = 0; i < 300; i++)); do
if [[ -S $NIX_DAEMON_SOCKET_PATH ]]; then
DAEMON_STARTED=1
break;
fi
sleep 0.1
done
if [[ -z ${DAEMON_STARTED+x} ]]; then
fail "Didnt manage to start the daemon"
fi
trap "killDaemon" EXIT
# Save for if daemon is killed
NIX_REMOTE_OLD=$NIX_REMOTE
export NIX_REMOTE=daemon
}
killDaemon() {
# Dont fail trying to stop a non-existant daemon twice
if [[ "${_NIX_TEST_DAEMON_PID-}" == '' ]]; then
return
fi
kill $_NIX_TEST_DAEMON_PID
for i in {0..100}; do
kill -0 $_NIX_TEST_DAEMON_PID 2> /dev/null || break
sleep 0.1
done
kill -9 $_NIX_TEST_DAEMON_PID 2> /dev/null || true
wait $_NIX_TEST_DAEMON_PID || true
rm -f $NIX_DAEMON_SOCKET_PATH
# Indicate daemon is stopped
unset _NIX_TEST_DAEMON_PID
# Restore old nix remote
NIX_REMOTE=$NIX_REMOTE_OLD
trap "" EXIT
}
restartDaemon() {
[[ -z "${_NIX_TEST_DAEMON_PID:-}" ]] && return 0
killDaemon
startDaemon
}
if [[ $(uname) == Linux ]] && [[ -L /proc/self/ns/user ]] && unshare --user true; then
_canUseSandbox=1
fi
isDaemonNewer () {
[[ -n "${NIX_DAEMON_PACKAGE:-}" ]] || return 0
local requiredVersion="$1"
local daemonVersion=$($NIX_DAEMON_PACKAGE/bin/nix-daemon --version | cut -d' ' -f3)
[[ $(nix eval --expr "builtins.compareVersions ''$daemonVersion'' ''$requiredVersion''") -ge 0 ]]
}
skipTest () {
echo "$1, skipping this test..." >&2
exit 99
}
requireDaemonNewerThan () {
isDaemonNewer "$1" || skipTest "Daemon is too old"
}
canUseSandbox() {
[[ ${_canUseSandbox-} ]]
}
requireSandboxSupport () {
canUseSandbox || skipTest "Sandboxing not supported"
}
requireGit() {
[[ $(type -p git) ]] || skipTest "Git not installed"
}
fail() {
echo "$1" >&2
exit 1
}
# Run a command failing if it didn't exit with the expected exit code.
#
# Has two advantages over the built-in `!`:
#
# 1. `!` conflates all non-0 codes. `expect` allows testing for an exact
# code.
#
# 2. `!` unexpectedly negates `set -e`, and cannot be used on individual
# pipeline stages with `set -o pipefail`. It only works on the entire
# pipeline, which is useless if we want, say, `nix ...` invocation to
# *fail*, but a grep on the error message it outputs to *succeed*.
expect() {
local expected res
expected="$1"
shift
"$@" && res=0 || res="$?"
if [[ $res -ne $expected ]]; then
echo "Expected '$expected' but got '$res' while running '${*@Q}'" >&2
return 1
fi
return 0
}
# Better than just doing `expect ... >&2` because the "Expected..."
# message below will *not* be redirected.
expectStderr() {
local expected res
expected="$1"
shift
"$@" 2>&1 && res=0 || res="$?"
if [[ $res -ne $expected ]]; then
echo "Expected '$expected' but got '$res' while running '${*@Q}'" >&2
return 1
fi
return 0
}
needLocalStore() {
if [[ "$NIX_REMOTE" == "daemon" ]]; then
skipTest "Cant run through the daemon ($1)"
fi
}
# Just to make it easy to find which tests should be fixed
buggyNeedLocalStore() {
needLocalStore "$1"
}
enableFeatures() {
local features="$1"
sed -i 's/experimental-features .*/& '"$features"'/' "$NIX_CONF_DIR"/nix.conf
}
set -x
onError() {
set +x
echo "$0: test failed at:" >&2
for ((i = 1; i < ${#BASH_SOURCE[@]}; i++)); do
if [[ -z ${BASH_SOURCE[i]} ]]; then break; fi
echo " ${FUNCNAME[i]} in ${BASH_SOURCE[i]}:${BASH_LINENO[i-1]}" >&2
done
}
# `grep -v` doesn't work well for exit codes. We want `!(exist line l. l
# matches)`. It gives us `exist line l. !(l matches)`.
#
# `!` normally doesn't work well with `set -e`, but when we wrap in a
# function it *does*.
grepInverse() {
! grep "$@"
}
# A shorthand, `> /dev/null` is a bit noisy.
#
# `grep -q` would seem to do this, no function necessary, but it is a
# bad fit with pipes and `set -o pipefail`: `-q` will exit after the
# first match, and then subsequent writes will result in broken pipes.
#
# Note that reproducing the above is a bit tricky as it depends on
# non-deterministic properties such as the timing between the match and
# the closing of the pipe, the buffering of the pipe, and the speed of
# the producer into the pipe. But rest assured we've seen it happen in
# CI reliably.
grepQuiet() {
grep "$@" > /dev/null
}
# The previous two, combined
grepQuietInverse() {
! grep "$@" > /dev/null
}
trap onError ERR
fi # COMMON_VARS_AND_FUNCTIONS_SH_SOURCED