internal/ci/ci_tool.cue

// Copyright 2021 The CUE Authors
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//     http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

package ci

import (
	"encoding/yaml"
	"path"

	"tool/exec"
	"tool/file"
	"tool/os"
)

// _#modroot is a common helper to get the module root
//
// TODO: use once we have a solution to cuelang.org/issue/704.
// This will then allow us to remove the use of .. below.
_#modroot: exec.Run & {
	cmd:    "go list -m -f {{.Dir}}"
	stdout: string
}

// Until we have the ability to inject contextual information
// we need to pass in GOOS explicitly. Either by environment
// variable (which we get for free when this is used via go generate)
// or via a tag in the case you want to manually run the CUE
// command.
_#goos: os.Getenv & {
	GOOS: *"unix" | string @tag(os)
}

// genworkflows regenerates the GitHub workflow Yaml definitions
//
// Until we have a resolution for cuelang.org/issue/704 this must be
// run from the internal/ci package. At which point we can switch to using
// _#modroot and move the associated go:generate directive into
// internal/ci alongside this command definition.
command: genworkflows: task: {
	goos: _#goos
	for w in workflows {
		"\(w.file)": file.Create & {
			_dir:     path.FromSlash("../../.github/workflows", "unix")
			filename: path.Join([_dir, w.file], goos.GOOS)
			contents: """
				# Generated by internal/ci/ci_tool.cue; do not edit

				\(yaml.Marshal(w.schema))
				"""
		}
	}
}