Extract InitGitDBRepo.create()
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2246513bee
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2 changed files with 114 additions and 68 deletions
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@ -24,14 +24,8 @@ package net.kemitix.gitdb;
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import lombok.RequiredArgsConstructor;
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import org.eclipse.jgit.api.Git;
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import org.eclipse.jgit.lib.*;
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import org.eclipse.jgit.util.FS;
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import java.io.File;
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import java.io.IOException;
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import java.nio.charset.StandardCharsets;
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import java.nio.file.DirectoryNotEmptyException;
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import java.nio.file.Files;
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import java.nio.file.NotDirectoryException;
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import java.nio.file.Path;
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import java.util.Optional;
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@ -43,14 +37,8 @@ import java.util.Optional;
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@RequiredArgsConstructor
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class GitDBLocal implements GitDB {
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private static final String INIT_MESSAGE = "Initialise GitDB v1";
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private static final String INIT_USER = "GitDB";
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private static final String INIT_EMAIL = "pcampbell@kemitix.net";
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private static final String MASTER = "master";
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private static final String IS_GIT_DB = "isGitDB";
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private static final String NOT_A_BARE_REPO = "Not a bare repo";
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private static final String ERROR_OPENING_REPOSITORY = "Error opening repository";
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private static final String REFS_HEADS_FORMAT = "refs/heads/%s";
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private final Repository repository;
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private final String userName;
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@ -94,65 +82,10 @@ class GitDBLocal implements GitDB {
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final String userName,
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final String userEmailAddress
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) throws IOException {
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initRepo(validDbDir(dbDir.toFile()));
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InitGitDBRepo.create(dbDir);
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return open(dbDir, userName, userEmailAddress);
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}
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private static File validDbDir(final File dbDir) throws IOException {
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verifyIsNotAFile(dbDir);
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if (dbDir.exists()) {
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verifyIsEmpty(dbDir);
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}
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return dbDir;
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}
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private static void verifyIsEmpty(final File dbDir) throws IOException {
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if (Files.newDirectoryStream(dbDir.toPath()).iterator().hasNext()) {
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throw new DirectoryNotEmptyException(dbDir.toString());
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}
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}
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private static void verifyIsNotAFile(final File dbDir) throws NotDirectoryException {
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if (dbDir.isFile()) {
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throw new NotDirectoryException(dbDir.toString());
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}
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}
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private static void initRepo(final File dbDir) throws IOException {
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dbDir.mkdirs();
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final Repository repository = RepositoryCache.FileKey.exact(dbDir, FS.DETECTED).open(false);
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repository.create(true);
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createInitialBranchOnMaster(repository);
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}
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private static void createInitialBranchOnMaster(final Repository repository) throws IOException {
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final GitDBRepo repo = GitDBRepo.in(repository);
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final ObjectId objectId = repo.insertBlob(new byte[0]);
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final ObjectId treeId = repo.insertNewTree(IS_GIT_DB, objectId);
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final ObjectId commitId = repo.insertCommit(treeId, INIT_MESSAGE, INIT_USER, INIT_EMAIL, ObjectId.zeroId());
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createBranch(repository, commitId, MASTER);
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}
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private static void createBranch(
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final Repository repository,
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final ObjectId commitId,
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final String branchName
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) throws IOException {
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final Path branchRefPath = branchRefPath(repository, branchName);
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final byte[] commitIdBytes = commitId.name().getBytes(StandardCharsets.UTF_8);
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Files.write(branchRefPath, commitIdBytes);
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}
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private static Path branchRefPath(
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final Repository repository,
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final String branchName
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) {
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return repository.getDirectory()
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.toPath()
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.resolve(String.format(REFS_HEADS_FORMAT, branchName))
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.toAbsolutePath();
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}
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@Override
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public Optional<GitDBBranch> branch(final String name) throws IOException {
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return Optional.ofNullable(repository.findRef(name))
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113
src/main/java/net/kemitix/gitdb/InitGitDBRepo.java
Normal file
113
src/main/java/net/kemitix/gitdb/InitGitDBRepo.java
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@ -0,0 +1,113 @@
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/*
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The MIT License (MIT)
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Copyright (c) 2018 Paul Campbell
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Permission is hereby granted, free of charge, to any person obtaining a copy of this software
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and associated documentation files (the "Software"), to deal in the Software without restriction,
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including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense,
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and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so,
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subject to the following conditions:
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The above copyright notice and this permission notice shall be included in all copies
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or substantial portions of the Software.
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED,
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INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE
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AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
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DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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*/
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package net.kemitix.gitdb;
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import org.eclipse.jgit.lib.ObjectId;
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import org.eclipse.jgit.lib.Repository;
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import org.eclipse.jgit.lib.RepositoryCache;
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import org.eclipse.jgit.util.FS;
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import java.io.File;
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import java.io.IOException;
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import java.nio.charset.StandardCharsets;
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import java.nio.file.DirectoryNotEmptyException;
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import java.nio.file.Files;
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import java.nio.file.NotDirectoryException;
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import java.nio.file.Path;
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/**
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* Initialise a new GitDB Repo.
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*
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* @author Paul Campbell (pcampbell@kemitix.net)
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*/
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class InitGitDBRepo {
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private static final String INIT_MESSAGE = "Initialise GitDB v1";
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private static final String INIT_USER = "GitDB";
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private static final String INIT_EMAIL = "pcampbell@kemitix.net";
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private static final String MASTER = "master";
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private static final String IS_GIT_DB = "isGitDB";
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private static final String REFS_HEADS_FORMAT = "refs/heads/%s";
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/**
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* Initialise a new GitDB repo.
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*
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* @param dbDir the directory to initialise the repo in
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* @throws IOException if there is an error in creating the repo files
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*/
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static void create(final Path dbDir) throws IOException {
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final InitGitDBRepo initRepo = new InitGitDBRepo();
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final File validDbDir = initRepo.validDbDir(dbDir.toFile());
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validDbDir.mkdirs();
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final Repository repository = RepositoryCache.FileKey.exact(validDbDir, FS.DETECTED).open(false);
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repository.create(true);
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initRepo.createInitialBranchOnMaster(repository);
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}
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private void createInitialBranchOnMaster(final Repository repository) throws IOException {
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final GitDBRepo repo = GitDBRepo.in(repository);
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final ObjectId objectId = repo.insertBlob(new byte[0]);
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final ObjectId treeId = repo.insertNewTree(IS_GIT_DB, objectId);
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final ObjectId commitId = repo.insertCommit(treeId, INIT_MESSAGE, INIT_USER, INIT_EMAIL, ObjectId.zeroId());
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createBranch(repository, commitId, MASTER);
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}
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private void createBranch(
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final Repository repository,
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final ObjectId commitId,
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final String branchName
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) throws IOException {
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final Path branchRefPath = branchRefPath(repository, branchName);
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final byte[] commitIdBytes = commitId.name().getBytes(StandardCharsets.UTF_8);
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Files.write(branchRefPath, commitIdBytes);
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}
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private Path branchRefPath(
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final Repository repository,
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final String branchName
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) {
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return repository.getDirectory()
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.toPath()
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.resolve(String.format(REFS_HEADS_FORMAT, branchName))
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.toAbsolutePath();
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}
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private File validDbDir(final File dbDir) throws IOException {
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verifyIsNotAFile(dbDir);
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if (dbDir.exists()) {
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verifyIsEmpty(dbDir);
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}
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return dbDir;
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}
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private void verifyIsEmpty(final File dbDir) throws IOException {
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if (Files.newDirectoryStream(dbDir.toPath()).iterator().hasNext()) {
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throw new DirectoryNotEmptyException(dbDir.toString());
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}
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}
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private void verifyIsNotAFile(final File dbDir) throws NotDirectoryException {
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if (dbDir.isFile()) {
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throw new NotDirectoryException(dbDir.toString());
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}
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}
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}
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