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// Copyright (C) 2015 The Android Open Source Project
//
// 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.google.gerrit.server.config;
import static java.nio.file.Files.isExecutable;
import static java.nio.file.Files.isRegularFile;
import com.google.inject.Inject;
import com.google.inject.Singleton;
import java.nio.file.Path;
import java.nio.file.Paths;
import org.eclipse.jgit.lib.Config;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
@Singleton
public class GitwebCgiConfig {
private static final Logger log = LoggerFactory.getLogger(GitwebCgiConfig.class);
public GitwebCgiConfig disabled() {
return new GitwebCgiConfig();
}
private final Path cgi;
private final Path css;
private final Path js;
private final Path logoPng;
@Inject
GitwebCgiConfig(SitePaths sitePaths, @GerritServerConfig Config cfg) {
if (GitwebConfig.isDisabled(cfg)) {
cgi = null;
css = null;
js = null;
logoPng = null;
return;
}
String cfgCgi = cfg.getString("gitweb", null, "cgi");
Path pkgCgi = Paths.get("/usr/lib/cgi-bin/gitweb.cgi");
String[] resourcePaths = {
"/usr/share/gitweb/static", "/usr/share/gitweb", "/var/www/static", "/var/www",
};
Path cgi;
if (cfgCgi != null) {
// Use the CGI script configured by the administrator, failing if it
// cannot be used as specified.
//
cgi = sitePaths.resolve(cfgCgi);
if (!isRegularFile(cgi)) {
throw new IllegalStateException("Cannot find gitweb.cgi: " + cgi);
}
if (!isExecutable(cgi)) {
throw new IllegalStateException("Cannot execute gitweb.cgi: " + cgi);
}
if (!cgi.equals(pkgCgi)) {
// Assume the administrator pointed us to the distribution,
// which also has the corresponding CSS and logo file.
//
String absPath = cgi.getParent().toAbsolutePath().toString();
resourcePaths = new String[] {absPath + "/static", absPath};
}
} else if (cfg.getString("gitweb", null, "url") != null) {
// Use an externally managed gitweb instance, and not an internal one.
//
cgi = null;
resourcePaths = new String[] {};
} else if (isRegularFile(pkgCgi) && isExecutable(pkgCgi)) {
// Use the OS packaged CGI.
//
log.debug("Assuming gitweb at " + pkgCgi);
cgi = pkgCgi;
} else {
log.warn("gitweb not installed (no " + pkgCgi + " found)");
cgi = null;
resourcePaths = new String[] {};
}
Path css = null;
Path js = null;
Path logo = null;
for (String path : resourcePaths) {
Path dir = Paths.get(path);
css = dir.resolve("gitweb.css");
js = dir.resolve("gitweb.js");
logo = dir.resolve("git-logo.png");
if (isRegularFile(css) && isRegularFile(logo)) {
break;
}
}
this.cgi = cgi;
this.css = css;
this.js = js;
this.logoPng = logo;
}
private GitwebCgiConfig() {
this.cgi = null;
this.css = null;
this.js = null;
this.logoPng = null;
}
/** @return local path to the CGI executable; null if we shouldn't execute. */
public Path getGitwebCgi() {
return cgi;
}
/** @return local path of the {@code gitweb.css} matching the CGI. */
public Path getGitwebCss() {
return css;
}
/** @return local path of the {@code gitweb.js} for the CGI. */
public Path getGitwebJs() {
return js;
}
/** @return local path of the {@code git-logo.png} for the CGI. */
public Path getGitLogoPng() {
return logoPng;
}
}
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