mirror of
https://github.com/kubernetes-sigs/kustomize.git
synced 2026-05-17 18:25:26 +00:00
60 lines
1.5 KiB
Go
60 lines
1.5 KiB
Go
/*
|
|
Copyright 2018 The Kubernetes 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 diff
|
|
|
|
import (
|
|
"io"
|
|
"os"
|
|
|
|
"github.com/kubernetes-sigs/kustomize/pkg/exec"
|
|
)
|
|
|
|
// program wraps the system diff program.
|
|
// If specified, the value of KUBERNETES_EXTERNAL_DIFF environment variable
|
|
// will be used instead of simply `diff(1)`.
|
|
type program struct {
|
|
stdout io.Writer
|
|
stderr io.Writer
|
|
}
|
|
|
|
func newProgram(out, errOut io.Writer) *program {
|
|
return &program{
|
|
stdout: out,
|
|
stderr: errOut,
|
|
}
|
|
}
|
|
|
|
func (d *program) makeCommand(args ...string) exec.Cmd {
|
|
diff := ""
|
|
if envDiff := os.Getenv("KUBERNETES_EXTERNAL_DIFF"); envDiff != "" {
|
|
diff = envDiff
|
|
} else {
|
|
diff = "diff"
|
|
args = append([]string{"-u", "-N"}, args...)
|
|
}
|
|
cmd := exec.New().Command(diff, args...)
|
|
cmd.SetStdout(d.stdout)
|
|
cmd.SetStderr(d.stderr)
|
|
return cmd
|
|
}
|
|
|
|
// run runs the detected diff program. `from` and `to` are the directory to diff.
|
|
func (d *program) run(from, to string) error {
|
|
d.makeCommand(from, to).Run() // Ignore diff return code
|
|
return nil
|
|
}
|