JanDeDobbeleer/oh-my-posh · warning

pulumi workspace file decode error

Error message

pulumi workspace file decode error

What it means

The pulumi segment reads the workspace cache file (~/.pulumi/workspaces/<...>/stack-name.json) and unmarshals it as JSON. If json.Unmarshal fails, the segment logs 'pulumi workspace file decode error' and returns early without setting the stack name — it swallows the underlying cause.

Source

Thrown at src/segments/pulumi.go:99

		return
	}

	stackNameFile := p.Name + "-" + p.workspaceSHA1 + "-" + "workspace.json"

	homedir := p.env.Home()

	workspaceCacheDir := filepath.Join(homedir, ".pulumi", "workspaces")
	if !p.env.HasFolder(workspaceCacheDir) || !p.env.HasFilesInDir(workspaceCacheDir, stackNameFile) {
		return
	}

	workspaceCacheFile := filepath.Join(workspaceCacheDir, stackNameFile)
	workspaceCacheFileContent := p.env.FileContent(workspaceCacheFile)

	var pulumiWorkspaceSpec pulumiWorkSpaceFileSpec
	err := json.Unmarshal([]byte(workspaceCacheFileContent), &pulumiWorkspaceSpec)
	if err != nil {
		log.Error(fmt.Errorf("pulumi workspace file decode error"))
		return
	}

	log.Debugf("pulumi stack name: %s", pulumiWorkspaceSpec.Stack)
	p.Stack = pulumiWorkspaceSpec.Stack
}

func (p *Pulumi) getProjectName() error {
	var kind, fileName string
	for _, file := range []string{pulumiYAML, pulumiJSON} {
		if p.env.HasFiles(file) {
			fileName = file
			kind = filepath.Ext(file)[1:]
		}
	}

	if kind == "" {
		return fmt.Errorf("no pulumi spec file found")

View on GitHub (pinned to 0976794618)

Solutions

1. Delete the stale workspace cache file and run `pulumi stack` once so pulumi regenerates it (`rm ~/.pulumi/workspaces/*/stack-name.json`)
2. Check the file contains valid JSON (`cat ~/.pulumi/workspaces/*/stack-name.json | jq .`)
3. Reinstall/align the pulumi CLI version with the oh-my-posh expectation
4. The segment degrades gracefully (stack not shown) — remove the pulumi segment if you don't use pulumi

Example fix

// before
$ cat ~/.pulumi/workspaces/*/stack-name.json
(empty file)
// after: regenerate
$ rm ~/.pulumi/workspaces/*/stack-name.json && cd myproject && pulumi stack select dev

// validate the cache file parses before use
data, err := os.ReadFile(stackNameFile)
if err != nil || !json.Valid(data) {
    // delete and let pulumi regenerate
}

// segment already swallows the cause; treat empty stack as 'not in a workspace'
if p.Stack == "" {
    hideSegment()
}

When it happens

Trigger: Rendering a pulumi segment when the workspace cache file is empty, truncated, contains non-JSON content, or its schema changed between pulumi CLI versions so fields no longer match pulumiWorkSpaceFileSpec.

Common situations: Interrupted pulumi command leaving a partial cache file; pulumi CLI upgrade changing the workspace file layout; the user lacking read permission (FileContent returns empty string, which is invalid JSON); running in a container where ~/.pulumi doesn't exist.

Related errors

• date field must be a valid number, got: %s
• no pulumi spec file found
• unknown pulumi spec file format
• pulumi stack name is empty, use `fetch_stack` property to en
• unable to get pulumi about output

AI-assisted analysis of JanDeDobbeleer/oh-my-posh@0976794618 (2026-08-31). Data as JSON: /api/errors/f046c4e6e0d3a9fc. Report an issue: GitHub.