75 lines
2.1 KiB
Go
75 lines
2.1 KiB
Go
package daggerhelm
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import (
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"context"
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"fmt"
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"os"
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"path"
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"text/template"
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"dagger.io/dagger"
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)
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const CONTAINER_IMAGE = "docker.io/alpine/k8s:1.26.3"
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func Compile(ctx context.Context, client *dagger.Client, chartPath string, valuesFilePath string) (*dagger.Directory, error) {
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chart := client.Host().Directory(chartPath)
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tmpdir := os.TempDir()
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err := os.MkdirAll(tmpdir, 0755)
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if err != nil {
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return nil, fmt.Errorf("failed to create tmpdir: %v", err)
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}
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tmpvalues, err := os.CreateTemp(tmpdir, "")
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if err != nil {
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return nil, fmt.Errorf("could not create a tempdir. err: %v", err)
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}
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//defer func() {
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// if _, err := os.Stat(tmpdir); !errors.Is(err, os.ErrNotExist) {
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// err := os.RemoveAll(tmpdir)
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// if err != nil {
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// panic(err)
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// }
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// }
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//}()
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tmpl, err := template.New("helm-dagger").ParseFiles(valuesFilePath)
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if err != nil {
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return nil, fmt.Errorf("failed to build template for values.yaml, err: %v", err)
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}
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err = tmpl.Execute(tmpvalues, struct{}{})
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if err != nil {
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return nil, fmt.Errorf("failed to execute template. err: %v", err)
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}
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err = tmpvalues.Sync()
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if err != nil {
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return nil, fmt.Errorf("failed to write to tmpfile. err: %v", err)
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}
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files, err := os.ReadDir(tmpdir)
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if err != nil {
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return nil, fmt.Errorf("failed to read tmpdir. err: %v", err)
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}
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valuesFileDirPath := path.Dir(tmpdir)
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valuesFileRelativePath := files[0].Name()
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valuesFile := client.Host().Directory(valuesFileDirPath).File(valuesFileRelativePath)
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helmoutput := client.Container().From(CONTAINER_IMAGE).WithWorkdir("/mnt").WithDirectory("chart", chart).WithFile("values.yaml", valuesFile).WithExec([]string{"helm", "template", ".", "--output-dir", "/mnt/output"})
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if exitCode, err := helmoutput.ExitCode(ctx); err != nil || exitCode != 0 {
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return nil, fmt.Errorf("failed to render helm chart: %v", err)
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}
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exported, err := helmoutput.Directory("/mnt/output").Export(ctx, "dist")
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if err != nil {
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return nil, fmt.Errorf("failed to export helm template: %v", err)
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}
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if !exported {
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return nil, fmt.Errorf("nothing was exported")
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}
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return nil, nil
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}
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