anomalyco/sst · error

failed to write filtered requirements file: %w

Error message

failed to write filtered requirements file: %w

What it means

After removing editable-install lines, filterEditableInstalls writes the filtered content with os.WriteFile(outputPath, ..., 0644) (build.go:1042). If the write fails — unwritable directory, full disk, path is a directory, or permission denied — this wrapped error is returned and dependency installation aborts before uv runs.

Source

Thrown at pkg/runtime/python/build.go:1045

		}

		if strings.HasPrefix(line, "-e ") {
			editablePath := strings.TrimSpace(strings.TrimPrefix(line, "-e "))

			if strings.HasPrefix(editablePath, "./") || strings.HasPrefix(editablePath, "../") ||
				strings.HasPrefix(editablePath, "/") && !strings.Contains(editablePath, "://") {
				continue
			}
		}

		// NON-editable local paths and boto3/botocore are handled downstream
		filteredLines = append(filteredLines, originalLine)
	}

	// Write filtered requirements
	filteredContent := strings.Join(filteredLines, "\n")
	if err := os.WriteFile(outputPath, []byte(filteredContent), 0644); err != nil {
		return fmt.Errorf("failed to write filtered requirements file: %w", err)
	}

	return nil
}

// cleanupInstalledDependencies removes __pycache__, .pyc files, .dist-info, test dirs,
// and boto3/botocore (Lambda provides them, saves ~22MB) unless user opts in.
func cleanupInstalledDependencies(targetDir string) error {
	err := filepath.Walk(targetDir, func(path string, info os.FileInfo, err error) error {
		if err != nil {
			return nil // Continue walking despite errors
		}

		if path == targetDir {
			return nil
		}

		if !info.IsDir() {

View on GitHub (pinned to a0bd20f762)

Solutions

1. Check the wrapped inner error for ENOSPC (disk full) / EACCES (permissions) and fix accordingly
2. Ensure the directory containing outputPath exists and is writable by the build user
3. Free disk space or raise runner disk quota, then re-run the deploy
4. Verify container/volume mounts are not read-only (rw flag) and no MAC policy blocks writes

Example fix

// before: read-only mount in CI
docker run -v $PWD:/app:ro sst deploy  # write fails

// after
docker run -v $PWD:/app sst deploy

// preflight: writable build dir and adequate disk before deploy
[ -w .sst ] || { echo ".sst not writable"; exit 1; }
[ "$(df -k . | awk 'NR==2{print $4}')" -gt 1048576 ] || echo "<1GB free, may fail"

When it happens

Trigger: Specifically: os.WriteFile(outputPath) fails while filterEditableInstalls runs from copySyncedDependencies or its anonymous caller — the outputPath directory doesn't exist, is read-only, or disk is exhausted.

Common situations: Read-only workspace mounts in CI containers; disk quota exceeded on build runners; outputPath pointing at a path occupied by a directory; SELinux/AppArmor denying writes to the build dir.

Related errors

• failed to filter requirements: %w
• failed to read requirements file: %w
• default Python Dockerfile not found at %s: %w
• failed to move extracted package: %w
• failed to remove old directory: %w

AI-assisted analysis of anomalyco/sst@a0bd20f762 (2026-08-30). Data as JSON: /api/errors/d546c66d75d657ba. Report an issue: GitHub.