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/*
* Copyright (C) 2022 Thomas Wolf <thomas.wolf@paranor.ch> and others
*
* This program and the accompanying materials are made available under the
* terms of the Eclipse Distribution License v. 1.0 which is available at
* https://www.eclipse.org/org/documents/edl-v10.php.
*
* SPDX-License-Identifier: BSD-3-Clause
*/
package org.eclipse.jgit.transport;
import java.util.HashMap;
import java.util.Map;
import java.util.Map.Entry;
import org.eclipse.jgit.lib.Config;
/**
* Support for URL translations via git configs {@code url.<base>.insteadOf} and
* {@code url.<base>.pushInsteadOf}.
*
* @since 6.2
*/
public class UrlConfig {
private static final String KEY_INSTEADOF = "insteadof"; //$NON-NLS-1$
private static final String KEY_PUSHINSTEADOF = "pushinsteadof"; //$NON-NLS-1$
private static final String SECTION_URL = "url"; //$NON-NLS-1$
private final Config config;
private Map<String, String> insteadOf;
private Map<String, String> pushInsteadOf;
/**
* Creates a new {@link UrlConfig} instance.
*
* @param config
* {@link Config} to read values from
*/
public UrlConfig(Config config) {
this.config = config;
}
/**
* Performs replacements as defined by git config
* {@code url.<base>.insteadOf}. If there is no match, the input is returned
* unchanged.
*
* @param url
* to substitute
* @return the {@code url} with substitution applied
*/
public String replace(String url) {
if (insteadOf == null) {
insteadOf = load(KEY_INSTEADOF);
}
return replace(url, insteadOf);
}
/**
* Tells whether there are push replacements.
*
* @return {@code true} if there are push replacements, {@code false}
* otherwise
*/
public boolean hasPushReplacements() {
if (pushInsteadOf == null) {
pushInsteadOf = load(KEY_PUSHINSTEADOF);
}
return !pushInsteadOf.isEmpty();
}
/**
* Performs replacements as defined by git config
* {@code url.<base>.pushInsteadOf}. If there is no match, the input is
* returned unchanged.
*
* @param url
* to substitute
* @return the {@code url} with substitution applied
*/
public String replacePush(String url) {
if (pushInsteadOf == null) {
pushInsteadOf = load(KEY_PUSHINSTEADOF);
}
return replace(url, pushInsteadOf);
}
private Map<String, String> load(String key) {
Map<String, String> replacements = new HashMap<>();
for (String url : config.getSubsections(SECTION_URL)) {
for (String prefix : config.getStringList(SECTION_URL, url, key)) {
replacements.put(prefix, url);
}
}
return replacements;
}
private String replace(String uri, Map<String, String> replacements) {
Entry<String, String> match = null;
for (Entry<String, String> replacement : replacements.entrySet()) {
// Ignore current entry if not longer than previous match
if (match != null && match.getKey().length() > replacement.getKey()
.length()) {
continue;
}
if (uri.startsWith(replacement.getKey())) {
match = replacement;
}
}
if (match != null) {
return match.getValue() + uri.substring(match.getKey().length());
}
return uri;
}
}
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