cue modules: move stdlib to pkg/alpha.dagger.io

In preparation for Europa, we will vendor multiple CUE modules:

- `pkg/alpha.dagger.io`: legacy non-europa packages
- `pkg/dagger.io`: core Europa packages
- `pkg/universe.dagger.io`: Europa universe

Signed-off-by: Andrea Luzzardi <aluzzardi@gmail.com>

pkg/alpha.dagger.io/helpers.bash

@@ -0,0 +1,109 @@
+common_setup() {
+    load 'node_modules/bats-support/load'
+    load 'node_modules/bats-assert/load'
+
+    # Dagger Binary
+    # FIXME: `command -v` must be wrapped in a sub-bash,
+    #   otherwise infinite recursion when DAGGER_BINARY is not set.
+    export DAGGER="${DAGGER_BINARY:-$(bash -c 'command -v dagger')}"
+
+    # Set the project to the universe directory (so tests can run from anywhere)
+    UNIVERSE="$( cd "$( dirname "$BATS_TEST_FILENAME" )" >/dev/null 2>&1 && pwd )"
+    DAGGER_PROJECT="$UNIVERSE"
+    export DAGGER_PROJECT
+
+    # Force plain printing for error reporting
+    DAGGER_LOG_FORMAT="plain"
+    export DAGGER_LOG_FORMAT
+
+    # Sandbox project.
+    DAGGER_SANDBOX="$(mktemp -d -t dagger-project-XXXXXX)"
+    export DAGGER_SANDBOX
+    dagger init --project "$DAGGER_SANDBOX"
+
+    # allows the use of `sops`
+    SOPS_AGE_KEY_FILE=~/.config/dagger/keys.txt
+    export SOPS_AGE_KEY_FILE
+}
+
+# dagger helper to execute the right binary
+dagger() {
+    "${DAGGER}" "$@"
+}
+
+# copy an environment from the current project to the sandbox.
+#
+# this is needed if the test requires altering inputs without dirtying the
+# current environment.
+# Usage:
+# copy_to_sandbox myenv
+# dagger input secret -w "$DAGGER_SANDBOX" -e myenv "temporary change"
+# dagger up --project "$DAGGER_SANDBOX" -e myenv
+#
+# To use testdata directory in tests, add the package name as second flag
+# Usage:
+# copy_to_sandbox myenv mypackage
+copy_to_sandbox() {
+    local name="$1"
+    local source="$DAGGER_PROJECT"/.dagger/env/"$name"
+    local target="$DAGGER_SANDBOX"/.dagger/env/"$name"
+
+    cp -a "$source" "$target"
+
+    if [ -d "$2" ]; then
+      local package="$2"
+      local source_package="$DAGGER_PROJECT"/"$package"
+      local target_package="$DAGGER_SANDBOX"/
+
+      cp -a "$source_package" "$target_package"
+    fi
+}
+
+# Check if there is a localstack instance.
+#
+# This is needed to do docs test in the CI.
+skip_unless_local_localstack() {
+    if [ "$(curl -s http://localhost:4566)" = '{"status": "running"}' ]; then
+        echo "Localstack available"
+    else
+        skip "Localstack not available"
+    fi
+}
+
+# Check if there is a local kubernetes cluster.
+#
+# This is need to do kubernetes test in the CI.
+skip_unless_local_kube() {
+    if [ -f ~/.kube/config ] && grep -q "127.0.0.1" ~/.kube/config &> /dev/null; then
+        echo "Kubernetes available"
+    else
+        skip "local kubernetes cluster not available"
+    fi
+}
+
+# Check if there is a local endpoint.
+#
+# This is necessary to do test with endpoint.
+# Usage:
+# skip_unless_endpoint_available "localhost:8080"
+skip_unless_endpoint_available() {
+  local endpoint="$1"
+
+  curl "$endpoint"
+}
+
+# Cleanup local Localstack instances
+setup_localstack() {
+    if [ "$(curl -s http://localhost:4566)" = '{"status": "running"}' ] && \
+        [ "$GITHUB_ACTIONS" != "true" ]; then
+        echo "Cleanup local LOCALSTACK"
+
+        # S3 buckets cleanup
+        aws --endpoint-url=http://localhost:4566 s3 rm s3://dagger-ci || true
+        aws --endpoint-url=http://localhost:4566 s3 mb s3://dagger-ci || true
+
+        # ECR repositories cleanup
+        aws --endpoint-url=http://localhost:4566 ecr delete-repository --repository-name dagger-ci || true
+        aws --endpoint-url=http://localhost:4566 ecr create-repository --repository-name dagger-ci || true
+    fi
+}