lix/tests/flakes/common.sh
John Ericson c11836126b Harden tests' bash
Use `set -u` and `set -o pipefail` to catch accidental mistakes and
failures more strongly.

 - `set -u` catches the use of undefined variables
 - `set -o pipefail` catches failures (like `set -e`) earlier in the
   pipeline.

This makes the tests a bit more robust. It is nice to read code not
worrying about these spurious success paths (via uncaught) errors
undermining the tests. Indeed, I caught some bugs doing this.

There are a few tests where we run a command that should fail, and then
search its output to make sure the failure message is one that we
expect. Before, since the `grep` was the last command in the pipeline
the exit code of those failing programs was silently ignored. Now with
`set -o pipefail` it won't be, and we have to do something so the
expected failure doesn't accidentally fail the test.

To do that we use `expect` and a new `expectStderr` to check for the
exact failing exit code. See the comments on each for why.

`grep -q` is replaced with `grepQuiet`, see the comments on that
function for why.

`grep -v` when we just want the exit code is replaced with `grepInverse,
see the comments on that function for why.

`grep -q -v` together is, surprise surprise, replaced with
`grepQuietInverse`, which is both combined.

Co-authored-by: Robert Hensing <roberth@users.noreply.github.com>
2023-03-08 10:26:30 -05:00

78 lines
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Bash

source ../common.sh
registry=$TEST_ROOT/registry.json
requireGit() {
if [[ -z $(type -p git) ]]; then
echo "Git not installed; skipping flake tests"
exit 99
fi
}
writeSimpleFlake() {
local flakeDir="$1"
cat > $flakeDir/flake.nix <<EOF
{
description = "Bla bla";
outputs = inputs: rec {
packages.$system = rec {
foo = import ./simple.nix;
default = foo;
};
packages.someOtherSystem = rec {
foo = import ./simple.nix;
default = foo;
};
# To test "nix flake init".
legacyPackages.$system.hello = import ./simple.nix;
};
}
EOF
cp ../simple.nix ../simple.builder.sh ../config.nix $flakeDir/
}
createSimpleGitFlake() {
local flakeDir="$1"
writeSimpleFlake $flakeDir
git -C $flakeDir add flake.nix simple.nix simple.builder.sh config.nix
git -C $flakeDir commit -m 'Initial'
}
writeDependentFlake() {
local flakeDir="$1"
cat > $flakeDir/flake.nix <<EOF
{
outputs = { self, flake1 }: {
packages.$system.default = flake1.packages.$system.default;
expr = assert builtins.pathExists ./flake.lock; 123;
};
}
EOF
}
writeTrivialFlake() {
local flakeDir="$1"
cat > $flakeDir/flake.nix <<EOF
{
outputs = { self }: {
expr = 123;
};
}
EOF
}
createGitRepo() {
local repo="$1"
local extraArgs="${2-}"
rm -rf $repo $repo.tmp
mkdir -p $repo
git -C $repo init $extraArgs
git -C $repo config user.email "foobar@example.com"
git -C $repo config user.name "Foobar"
}