final String outputPath = outputFile.getAbsolutePath();
                final List<String> cmdList = new ArrayList<>();
                for (final String value : commandList) {
                    cmdList.add(expandPath(value.replace("${url}", tempPath).replace("${outputFile}", outputPath)));
                }

                executeCommand(thumbnailId, cmdList);

                if (outputFile.isFile() && outputFile.length() == 0) {

        }
        return task;
    }

    public void setDirectoryNameLength(final int directoryNameLength) {
        this.directoryNameLength = directoryNameLength;
    }

    protected String expandPath(final String value) {
        if (value != null && filePathMap.containsKey(value)) {
            return filePathMap.get(value);
        }
        return value;
    }

	root = filepath.Join(root, "src")
	if !str.HasFilePathPrefix(dir, root) || path != "command-line-arguments" && filepath.Join(root, path) != dir {
		// Look for symlinks before reporting error.
		dir = expandPath(dir)
		root = expandPath(root)
	}