| package org.apache.maven.scm.provider.svn; |
| |
| /* |
| * Copyright 2003-2005 The Apache Software Foundation. |
| * |
| * 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. |
| */ |
| |
| import org.apache.maven.scm.provider.svn.repository.SvnScmProviderRepository; |
| import org.codehaus.plexus.util.StringUtils; |
| |
| public class SvnTagBranchUtils |
| { |
| |
| public final static String[] REVISION_SPECIFIERS = new String[] { "HEAD", "BASE", "COMMITTED", "PREV" }; |
| |
| public final static String SVN_TRUNK = "trunk"; |
| |
| public final static String SVN_BRANCHES = "branches"; |
| |
| public final static String SVN_TAGS = "tags"; |
| |
| public final static String[] SVN_BASE_DIRS = new String[] { SVN_TRUNK, SVN_BRANCHES, SVN_TAGS }; |
| |
| /** |
| * Simple helper function to concatenate two paths together with a "/". |
| * Handles trailing / on basePath. |
| * Returns no trailing "/" if the addlPath is null |
| */ |
| static String appendPath( String basePath, String addlPath ) |
| { |
| basePath = StringUtils.stripEnd( basePath, "/" ); |
| |
| if ( StringUtils.isEmpty( addlPath ) ) |
| { |
| return basePath; |
| } |
| else |
| { |
| return basePath + "/" + StringUtils.stripStart( addlPath, "/" ); |
| } |
| } |
| |
| /** Returns the project root for the given repository url, |
| * where "project root" is the root of the /trunk, /branches, /tags |
| * directories |
| * |
| * @param repoPath Repository path/url to be searched |
| * @return |
| */ |
| public static String getProjectRoot( String repoPath ) |
| { |
| for ( int i = 0; i < SVN_BASE_DIRS.length; i++ ) |
| { |
| String base = "/" + SVN_BASE_DIRS[i]; |
| int pos = repoPath.indexOf( base + "/" ); |
| if ( pos >= 0 ) |
| { |
| return repoPath.substring( 0, pos ); |
| } |
| else if ( repoPath.endsWith( base ) ) |
| { |
| return repoPath.substring( 0, repoPath.length() - base.length() ); |
| } |
| } |
| |
| // At this point we were unable to locate the project root of this url |
| // so assume that the repository url specified is the project root |
| return appendPath( repoPath, null ); |
| } |
| |
| /** |
| * Resolves a tag to a repository url. |
| * |
| * |
| * @param repository the repository to use as a base for tag resolution |
| * @param branchTagName tag name |
| * @return |
| * @see #resolveUrl(SvnScmProviderRepository, String, String) |
| */ |
| public static String resolveTagUrl( SvnScmProviderRepository repository, String tag ) |
| { |
| return resolveUrl( repository, SVN_TAGS, tag ); |
| } |
| |
| /** |
| * Resolves a tag to a repository url. |
| * |
| * |
| * @param repository the repository to use as a base for tag resolution |
| * @param branchTagName tag name |
| * @return |
| * @see #resolveUrl(SvnScmProviderRepository, String, String) |
| */ |
| public static String resolveBranchUrl( SvnScmProviderRepository repository, String tag ) |
| { |
| return resolveUrl( repository, SVN_BRANCHES, tag ); |
| } |
| |
| /** |
| * Resolves a tag or branch name to a repository url.<br> |
| * If the <code>branchTagName</code> is an absolute URL, that value is returned. |
| * (i.e. http://foo.com/svn/myproject/tags/my-tag)<br> |
| * |
| * If the repository has a {@link SvnScmProviderRepository#getTagBase()} specified, |
| * the tag is simply appended to the tagBase value. Note that at this time, we are using |
| * the tagBase as a base for both branches and tags.<br> |
| * |
| * If the <code>branchTagName</code> contains a branch/tag specifier (i.e. "/branches", "/tags", "/trunk"), |
| * the <code>branchTagName</code> is appended to the <code>projectRoot</code> without adding the subdir.<br> |
| * Else, the result is in the format of <code>projectRoot/subdir/branchTagName</code> directory.<br> |
| * |
| * @param projectRoot Project root to use when building the url. |
| * @param subdir Subdirectory to append to the project root |
| * (for branching use "branches", tags use "tags") |
| * @param branchTagName Name of the actual branch or tag. Can be an absolute url, simple tag/branch name, |
| * or even contain a relative path to the root like "branches/my-branch" |
| * @return |
| */ |
| public static String resolveUrl( SvnScmProviderRepository repository, String subdir, String branchTagName ) |
| { |
| String projectRoot = getProjectRoot( repository.getUrl() ); |
| branchTagName = StringUtils.strip( branchTagName, "/" ); |
| |
| if ( StringUtils.isEmpty( branchTagName ) ) |
| { |
| return null; |
| } |
| |
| if ( branchTagName.indexOf( "://" ) >= 0 ) |
| { |
| // branch/tag is already an absolute url so just return it. |
| return branchTagName; |
| } |
| |
| // User has a tagBase specified so just return the name appended to the tagBase |
| if ( StringUtils.isNotEmpty( repository.getTagBase() ) ) |
| { |
| return appendPath( repository.getTagBase(), branchTagName ); |
| } |
| |
| // Look for any "branches/" or "tags/" specifiers in the branchTagName. If one occurs, |
| // don't append the subdir to the projectRoot when appending the name |
| for ( int i = 0; i < SVN_BASE_DIRS.length; i++ ) |
| { |
| if ( branchTagName.startsWith( SVN_BASE_DIRS[i] + "/" ) ) |
| { |
| return appendPath( projectRoot, branchTagName ); |
| } |
| } |
| |
| return appendPath( appendPath( projectRoot, subdir ), branchTagName ); |
| } |
| |
| /* Helper function that does the checking for {@link #isRevisionSpecifier} |
| */ |
| private static boolean checkRevisionArg( String arg ) |
| { |
| if ( StringUtils.isNumeric( arg ) || ( arg.startsWith( "{" ) && arg.endsWith( "}" ) ) ) |
| { |
| return true; |
| } |
| |
| for ( int i = 0; i < REVISION_SPECIFIERS.length; i++ ) |
| { |
| if ( REVISION_SPECIFIERS[i].equalsIgnoreCase( arg ) ) |
| { |
| return true; |
| } |
| } |
| |
| return false; |
| } |
| |
| /** |
| * Returns whether the supplied tag refers to an actual revision or |
| * is specifying a tag/branch url in the repository. |
| * According to the subversion documentation, the following are valid revision specifiers: |
| * NUMBER revision number |
| * "{" DATE "}" revision at start of the date |
| * "HEAD" latest in repository |
| * "BASE" base rev of item's working copy |
| * "COMMITTED" last commit at or before BASE |
| * "PREV" |
| * |
| * For command such as diff, the revision argument can be in the format of: |
| * IDENTIFIER:IDENTIFIER where IDENTIFIER is one of the args listed above |
| */ |
| public static boolean isRevisionSpecifier( String tag ) |
| { |
| if ( StringUtils.isEmpty( tag ) ) |
| { |
| return false; |
| } |
| |
| if ( checkRevisionArg( tag ) ) |
| { |
| return true; |
| } |
| |
| String[] parts = StringUtils.split( tag, ":" ); |
| if ( parts.length == 2 && StringUtils.isNotEmpty( parts[0] ) && StringUtils.isNotEmpty( parts[1] ) ) |
| { |
| return checkRevisionArg( parts[0] ) && checkRevisionArg( parts[1] ); |
| } |
| |
| return false; |
| } |
| } |
