com.metreeca.mark.pipes.Less Maven / Gradle / Ivy

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A minimalist Maven plugin for static site generation

There is a newer version: 0.9.1

/*
 * Copyright © 2019-2020 Metreeca srl
 *
 * 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 com.metreeca.mark.pipes;

import com.metreeca.mark.*;

import java.io.IOException;
import java.io.UncheckedIOException;
import java.nio.file.Files;
import java.nio.file.Path;
import java.util.Optional;

import static com.inet.lib.less.Less.compile;
import static com.metreeca.mark.Mark.target;
import static java.nio.charset.StandardCharsets.UTF_8;


public final class Less implements Pipe {

	public Less(final Mark mark) {

		if ( mark == null ) {
			throw new NullPointerException("null mark");
		}

	}


	////////////////////////////////////////////////////////////////////////////////////////////////////////////////////

	@Override public Optional process(final Path source) {
		return target(source, ".css", ".less", ".css").map(target -> new Page(target, path -> {
			try {

				final String less=new String(Files.readAllBytes(source), UTF_8);
				final String css=compile(path.toUri().toURL(), less, true);

				Files.write(path, css.getBytes(UTF_8));

			} catch ( final IOException e ) {
				throw new UncheckedIOException(e);
			}
		}));
	}

}