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kustomize.go
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kustomize.go
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// Copyright 2024 The PipeCD 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 kubernetes
import (
"bytes"
"context"
"fmt"
"os/exec"
"go.uber.org/zap"
)
type Kustomize struct {
version string
execPath string
logger *zap.Logger
}
func NewKustomize(version, path string, logger *zap.Logger) *Kustomize {
return &Kustomize{
version: version,
execPath: path,
logger: logger,
}
}
func (c *Kustomize) Template(ctx context.Context, appName, appDir string, opts map[string]string) (string, error) {
args := []string{
"build",
".",
}
for k, v := range opts {
args = append(args, fmt.Sprintf("--%s", k))
if v != "" {
args = append(args, v)
}
}
var stdout, stderr bytes.Buffer
cmd := exec.CommandContext(ctx, c.execPath, args...)
cmd.Dir = appDir
cmd.Stdout = &stdout
cmd.Stderr = &stderr
c.logger.Info(fmt.Sprintf("start templating a Kustomize application %s", appName),
zap.Any("args", args),
)
if err := cmd.Run(); err != nil {
return stdout.String(), fmt.Errorf("%w: %s", err, stderr.String())
}
return stdout.String(), nil
}