Describe: add support for core.abbrev config option
If core.abbrev is unset or "auto" estimate abbreviation length like C git does: - Estimate repository's object count by only considering packed objects, round up to next power of 2 - With the order of 2^len objects, we expect a collision at 2^(len/2). But we also care about hex chars, not bits, and there are 4 bits per hex. So all together we need to divide by 2; but we also want to round odd numbers up, hence adding one before dividing. - For small repos use at least 7 hexdigits - If object database fails to determine object count use 7 hexdigits as fallback If it is set to "no" do not abbreviate object-ids. Otherwise set it to the configured value capped to the range between 4 and length of an unabbreviated object-id. Change-Id: I425f9724b69813dbb57872466bf2d2e1d6dc72c6
This commit is contained in:
parent
9244c07d73
commit
6f175ea6c4
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@ -0,0 +1,128 @@
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/*
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* Copyright (C) 2022, Matthias Sohn <matthias.sohn@sap.com> and others
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*
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* This program and the accompanying materials are made available under the
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* terms of the Eclipse Distribution License v. 1.0 which is available at
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* https://www.eclipse.org/org/documents/edl-v10.php.
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*
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* SPDX-License-Identifier: BSD-3-Clause
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*/
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package org.eclipse.jgit.lib;
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import static org.junit.Assert.assertEquals;
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import static org.junit.Assert.assertThrows;
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import java.io.IOException;
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import org.eclipse.jgit.api.errors.InvalidConfigurationException;
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import org.eclipse.jgit.junit.RepositoryTestCase;
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import org.eclipse.jgit.storage.file.FileBasedConfig;
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import org.junit.Test;
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public class AbbrevConfigTest extends RepositoryTestCase {
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@Test
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public void testDefault() throws Exception {
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assertEquals(7, testCoreAbbrev(null));
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}
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@Test
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public void testAuto() throws Exception {
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assertEquals(7, testCoreAbbrev("auto"));
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}
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@Test
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public void testNo() throws Exception {
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assertEquals(40, testCoreAbbrev("no"));
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}
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@Test
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public void testValidMin() throws Exception {
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assertEquals(4, testCoreAbbrev("4"));
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}
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@Test
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public void testValid() throws Exception {
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assertEquals(22, testCoreAbbrev("22"));
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}
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@Test
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public void testValidMax() throws Exception {
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assertEquals(40, testCoreAbbrev("40"));
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}
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@Test
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public void testInvalid() {
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assertThrows(InvalidConfigurationException.class,
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() -> testCoreAbbrev("foo"));
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}
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@Test
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public void testInvalid2() {
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assertThrows(InvalidConfigurationException.class,
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() -> testCoreAbbrev("2k"));
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}
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@Test
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public void testInvalidNegative() {
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assertThrows(InvalidConfigurationException.class,
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() -> testCoreAbbrev("-1000"));
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}
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@Test
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public void testInvalidBelowRange() {
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assertThrows(InvalidConfigurationException.class,
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() -> testCoreAbbrev("3"));
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}
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@Test
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public void testInvalidBelowRange2() {
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assertThrows(InvalidConfigurationException.class,
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() -> testCoreAbbrev("-1"));
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}
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@Test
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public void testInvalidAboveRange() {
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assertThrows(InvalidConfigurationException.class,
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() -> testCoreAbbrev("41"));
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}
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@Test
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public void testInvalidAboveRange2() {
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assertThrows(InvalidConfigurationException.class,
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() -> testCoreAbbrev("100000"));
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}
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@Test
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public void testToStringNo()
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throws InvalidConfigurationException, IOException {
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assertEquals("40", setCoreAbbrev("no").toString());
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}
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@Test
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public void testToString()
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throws InvalidConfigurationException, IOException {
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assertEquals("7", setCoreAbbrev("auto").toString());
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}
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@Test
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public void testToString12()
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throws InvalidConfigurationException, IOException {
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assertEquals("12", setCoreAbbrev("12").toString());
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}
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private int testCoreAbbrev(String value)
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throws InvalidConfigurationException, IOException {
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return setCoreAbbrev(value).get();
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}
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private AbbrevConfig setCoreAbbrev(String value)
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throws IOException, InvalidConfigurationException {
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FileBasedConfig config = db.getConfig();
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config.setString(ConfigConstants.CONFIG_CORE_SECTION, null,
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ConfigConstants.CONFIG_KEY_ABBREV, value);
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config.save();
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return AbbrevConfig.parseFromConfig(db);
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}
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}
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@ -23,6 +23,22 @@
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</message_arguments>
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</message_arguments>
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</filter>
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</filter>
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</resource>
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</resource>
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<resource path="src/org/eclipse/jgit/lib/ObjectDatabase.java" type="org.eclipse.jgit.lib.ObjectDatabase">
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<filter id="336695337">
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<message_arguments>
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<message_argument value="org.eclipse.jgit.lib.ObjectDatabase"/>
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<message_argument value="getApproximateObjectCount()"/>
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</message_arguments>
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</filter>
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</resource>
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<resource path="src/org/eclipse/jgit/lib/TypedConfigGetter.java" type="org.eclipse.jgit.lib.TypedConfigGetter">
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<filter id="403804204">
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<message_arguments>
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<message_argument value="org.eclipse.jgit.lib.TypedConfigGetter"/>
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<message_argument value="getIntInRange(Config, String, String, String, int, int, int)"/>
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</message_arguments>
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</filter>
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</resource>
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<resource path="src/org/eclipse/jgit/transport/BasePackPushConnection.java" type="org.eclipse.jgit.transport.BasePackPushConnection">
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<resource path="src/org/eclipse/jgit/transport/BasePackPushConnection.java" type="org.eclipse.jgit.transport.BasePackPushConnection">
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<filter id="338792546">
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<filter id="338792546">
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<message_arguments>
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<message_arguments>
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@ -366,6 +366,7 @@ invalidAncestryLength=Invalid ancestry length
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invalidBooleanValue=Invalid boolean value: {0}.{1}={2}
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invalidBooleanValue=Invalid boolean value: {0}.{1}={2}
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invalidChannel=Invalid channel {0}
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invalidChannel=Invalid channel {0}
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invalidCommitParentNumber=Invalid commit parent number
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invalidCommitParentNumber=Invalid commit parent number
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invalidCoreAbbrev=Invalid value {0} of option core.abbrev
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invalidDepth=Invalid depth: {0}
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invalidDepth=Invalid depth: {0}
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invalidEncoding=Invalid encoding from git config i18n.commitEncoding: {0}
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invalidEncoding=Invalid encoding from git config i18n.commitEncoding: {0}
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invalidEncryption=Invalid encryption
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invalidEncryption=Invalid encryption
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@ -9,9 +9,9 @@
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*/
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*/
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package org.eclipse.jgit.api;
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package org.eclipse.jgit.api;
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import static org.eclipse.jgit.lib.Constants.OBJECT_ID_ABBREV_STRING_LENGTH;
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import static org.eclipse.jgit.lib.Constants.R_REFS;
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import static org.eclipse.jgit.lib.Constants.R_REFS;
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import static org.eclipse.jgit.lib.Constants.R_TAGS;
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import static org.eclipse.jgit.lib.Constants.R_TAGS;
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import static org.eclipse.jgit.lib.TypedConfigGetter.UNSET_INT;
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import java.io.IOException;
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import java.io.IOException;
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import java.text.MessageFormat;
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import java.text.MessageFormat;
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@ -34,6 +34,7 @@
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import org.eclipse.jgit.errors.MissingObjectException;
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import org.eclipse.jgit.errors.MissingObjectException;
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import org.eclipse.jgit.fnmatch.FileNameMatcher;
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import org.eclipse.jgit.fnmatch.FileNameMatcher;
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import org.eclipse.jgit.internal.JGitText;
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import org.eclipse.jgit.internal.JGitText;
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import org.eclipse.jgit.lib.AbbrevConfig;
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import org.eclipse.jgit.lib.Constants;
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import org.eclipse.jgit.lib.Constants;
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import org.eclipse.jgit.lib.ObjectId;
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import org.eclipse.jgit.lib.ObjectId;
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import org.eclipse.jgit.lib.Ref;
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import org.eclipse.jgit.lib.Ref;
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@ -92,7 +93,7 @@ public class DescribeCommand extends GitCommand<String> {
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/**
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/**
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* The prefix length to use when abbreviating a commit hash.
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* The prefix length to use when abbreviating a commit hash.
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*/
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*/
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private int abbrev = OBJECT_ID_ABBREV_STRING_LENGTH;
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private int abbrev = UNSET_INT;
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/**
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/**
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* Constructor for DescribeCommand.
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* Constructor for DescribeCommand.
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@ -216,12 +217,17 @@ public DescribeCommand setAlways(boolean always) {
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*
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*
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* @param abbrev
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* @param abbrev
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* minimum length of the abbreviated string. Must be in the range
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* minimum length of the abbreviated string. Must be in the range
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* [2, {@value Constants#OBJECT_ID_STRING_LENGTH}].
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* [{@value AbbrevConfig#MIN_ABBREV},
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* {@value Constants#OBJECT_ID_STRING_LENGTH}].
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* @return {@code this}
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* @return {@code this}
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* @since 6.1
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* @since 6.1
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*/
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*/
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public DescribeCommand setAbbrev(int abbrev) {
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public DescribeCommand setAbbrev(int abbrev) {
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this.abbrev = abbrev;
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if (abbrev == 0) {
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this.abbrev = 0;
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} else {
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this.abbrev = AbbrevConfig.capAbbrev(abbrev);
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}
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return this;
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return this;
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}
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}
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@ -232,13 +238,7 @@ private String longDescription(Ref tag, int depth, ObjectId tip)
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}
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}
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return String.format("%s-%d-g%s", formatRefName(tag.getName()), //$NON-NLS-1$
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return String.format("%s-%d-g%s", formatRefName(tag.getName()), //$NON-NLS-1$
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Integer.valueOf(depth),
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Integer.valueOf(depth),
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w.getObjectReader().abbreviate(tip, getCappedAbbrev()).name());
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w.getObjectReader().abbreviate(tip, abbrev).name());
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}
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private int getCappedAbbrev() {
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int len = Math.max(abbrev, 4);
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len = Math.min(len, Constants.OBJECT_ID_STRING_LENGTH);
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return len;
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}
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}
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/**
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/**
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@ -330,6 +330,9 @@ public String call() throws GitAPIException {
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if (target == null) {
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if (target == null) {
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setTarget(Constants.HEAD);
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setTarget(Constants.HEAD);
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}
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}
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if (abbrev == UNSET_INT) {
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abbrev = AbbrevConfig.parseFromConfig(repo).get();
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}
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Collection<Ref> tagList = repo.getRefDatabase()
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Collection<Ref> tagList = repo.getRefDatabase()
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.getRefsByPrefix(useAll ? R_REFS : R_TAGS);
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.getRefsByPrefix(useAll ? R_REFS : R_TAGS);
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if (candidates.isEmpty()) {
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if (candidates.isEmpty()) {
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return always
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return always
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? w.getObjectReader()
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? w.getObjectReader()
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.abbreviate(target, getCappedAbbrev())
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.abbreviate(target,
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AbbrevConfig.capAbbrev(abbrev))
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.name()
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.name()
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: null;
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: null;
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}
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}
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@ -394,6 +394,7 @@ public static JGitText get() {
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/***/ public String invalidBooleanValue;
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/***/ public String invalidBooleanValue;
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/***/ public String invalidChannel;
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/***/ public String invalidChannel;
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/***/ public String invalidCommitParentNumber;
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/***/ public String invalidCommitParentNumber;
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/***/ public String invalidCoreAbbrev;
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/***/ public String invalidDepth;
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/***/ public String invalidDepth;
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/***/ public String invalidEncoding;
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/***/ public String invalidEncoding;
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/***/ public String invalidEncryption;
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/***/ public String invalidEncryption;
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@ -165,6 +165,15 @@ public void flush() {
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}
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}
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};
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};
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}
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}
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@Override
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public long getApproximateObjectCount() {
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long count = 0;
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for (DfsPackDescription p : packs) {
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count += p.getObjectCount();
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}
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return count;
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}
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}
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}
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private static class MemPack extends DfsPackDescription {
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private static class MemPack extends DfsPackDescription {
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@ -263,4 +263,17 @@ private static class UnpackedObjectId extends ObjectIdOwnerMap.Entry {
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private AlternateHandle.Id getAlternateId() {
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private AlternateHandle.Id getAlternateId() {
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return wrapped.getAlternateId();
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return wrapped.getAlternateId();
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}
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}
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@Override
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public long getApproximateObjectCount() {
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long count = 0;
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for (Pack p : getPacks()) {
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try {
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count += p.getObjectCount();
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} catch (IOException e) {
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return -1;
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}
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}
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return count;
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}
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}
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}
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@ -212,6 +212,20 @@ public Collection<Pack> getPacks() {
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return packed.getPacks();
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return packed.getPacks();
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}
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}
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/** {@inheritDoc} */
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@Override
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public long getApproximateObjectCount() {
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long count = 0;
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for (Pack p : getPacks()) {
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try {
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count += p.getIndex().getObjectCount();
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} catch (IOException e) {
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return -1;
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}
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}
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return count;
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}
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/**
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/**
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* {@inheritDoc}
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* {@inheritDoc}
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* <p>
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* <p>
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@ -0,0 +1,150 @@
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/*
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* Copyright (C) 2022, Matthias Sohn <matthias.sohn@sap.com> and others
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*
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* This program and the accompanying materials are made available under the
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* terms of the Eclipse Distribution License v. 1.0 which is available at
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* https://www.eclipse.org/org/documents/edl-v10.php.
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*
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* SPDX-License-Identifier: BSD-3-Clause
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*/
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package org.eclipse.jgit.lib;
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import static org.eclipse.jgit.lib.Constants.OBJECT_ID_ABBREV_STRING_LENGTH;
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import static org.eclipse.jgit.lib.TypedConfigGetter.UNSET_INT;
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import java.text.MessageFormat;
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import org.eclipse.jgit.api.errors.InvalidConfigurationException;
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import org.eclipse.jgit.internal.JGitText;
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/**
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* Git configuration option <a
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* href=https://git-scm.com/docs/git-config#Documentation/git-config.txt-coreabbrev">
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* core.abbrev</a>
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*
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* @since 6.1
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*/
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public final class AbbrevConfig {
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private static final String VALUE_NO = "no"; //$NON-NLS-1$
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private static final String VALUE_AUTO = "auto"; //$NON-NLS-1$
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/**
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* The minimum value of abbrev
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*/
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public static final int MIN_ABBREV = 4;
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/**
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* Cap configured core.abbrev to range between minimum of 4 and number of
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* hex-digits of a full object id.
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*
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* @param len
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* configured number of hex-digits to abbreviate object ids to
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* @return core.abbrev capped to range between minimum of 4 and number of
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* hex-digits of a full object id
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*/
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public static int capAbbrev(int len) {
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return Math.min(Math.max(MIN_ABBREV, len),
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Constants.OBJECT_ID_STRING_LENGTH);
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}
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/**
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|
* No abbreviation
|
||||||
|
*/
|
||||||
|
public final static AbbrevConfig NO = new AbbrevConfig(
|
||||||
|
Constants.OBJECT_ID_STRING_LENGTH);
|
||||||
|
|
||||||
|
/**
|
||||||
|
* Parse string value of core.abbrev git option for a given repository
|
||||||
|
*
|
||||||
|
* @param repo
|
||||||
|
* repository
|
||||||
|
* @return the parsed AbbrevConfig
|
||||||
|
* @throws InvalidConfigurationException
|
||||||
|
* if value of core.abbrev is invalid
|
||||||
|
*/
|
||||||
|
public static AbbrevConfig parseFromConfig(Repository repo)
|
||||||
|
throws InvalidConfigurationException {
|
||||||
|
Config config = repo.getConfig();
|
||||||
|
String value = config.getString(ConfigConstants.CONFIG_CORE_SECTION,
|
||||||
|
null, ConfigConstants.CONFIG_KEY_ABBREV);
|
||||||
|
if (value == null || value.equalsIgnoreCase(VALUE_AUTO)) {
|
||||||
|
return auto(repo);
|
||||||
|
}
|
||||||
|
if (value.equalsIgnoreCase(VALUE_NO)) {
|
||||||
|
return NO;
|
||||||
|
}
|
||||||
|
try {
|
||||||
|
int len = config.getIntInRange(ConfigConstants.CONFIG_CORE_SECTION,
|
||||||
|
ConfigConstants.CONFIG_KEY_ABBREV, MIN_ABBREV,
|
||||||
|
Constants.OBJECT_ID_STRING_LENGTH, UNSET_INT);
|
||||||
|
if (len == UNSET_INT) {
|
||||||
|
// Unset was checked above. If we get UNSET_INT here, then
|
||||||
|
// either the value was UNSET_INT, or it was an invalid value
|
||||||
|
// (not an integer, or out of range), and EGit's
|
||||||
|
// ReportingTypedGetter caught the exception and has logged a
|
||||||
|
// warning. In either case we should fall back to some sane
|
||||||
|
// default.
|
||||||
|
len = OBJECT_ID_ABBREV_STRING_LENGTH;
|
||||||
|
}
|
||||||
|
return new AbbrevConfig(len);
|
||||||
|
} catch (IllegalArgumentException e) {
|
||||||
|
throw new InvalidConfigurationException(MessageFormat
|
||||||
|
.format(JGitText.get().invalidCoreAbbrev, value), e);
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
/**
|
||||||
|
* An appropriate value is computed based on the approximate number of
|
||||||
|
* packed objects in a repository, which hopefully is enough for abbreviated
|
||||||
|
* object names to stay unique for some time.
|
||||||
|
*
|
||||||
|
* @param repo
|
||||||
|
* @return appropriate value computed based on the approximate number of
|
||||||
|
* packed objects in a repository
|
||||||
|
*/
|
||||||
|
private static AbbrevConfig auto(Repository repo) {
|
||||||
|
long count = repo.getObjectDatabase().getApproximateObjectCount();
|
||||||
|
if (count == -1) {
|
||||||
|
return new AbbrevConfig(OBJECT_ID_ABBREV_STRING_LENGTH);
|
||||||
|
}
|
||||||
|
// find msb, round to next power of 2
|
||||||
|
int len = 63 - Long.numberOfLeadingZeros(count) + 1;
|
||||||
|
// With the order of 2^len objects, we expect a collision at
|
||||||
|
// 2^(len/2). But we also care about hex chars, not bits, and
|
||||||
|
// there are 4 bits per hex. So all together we need to divide
|
||||||
|
// by 2; but we also want to round odd numbers up, hence adding
|
||||||
|
// one before dividing.
|
||||||
|
len = (len + 1) / 2;
|
||||||
|
// for small repos use at least fallback length
|
||||||
|
return new AbbrevConfig(Math.max(len, OBJECT_ID_ABBREV_STRING_LENGTH));
|
||||||
|
}
|
||||||
|
|
||||||
|
/**
|
||||||
|
* All other possible abbreviation lengths. Valid range 4 to number of
|
||||||
|
* hex-digits of an unabbreviated object id (40 for SHA1 object ids, jgit
|
||||||
|
* doesn't support SHA256 yet).
|
||||||
|
*/
|
||||||
|
private int abbrev;
|
||||||
|
|
||||||
|
/**
|
||||||
|
* @param abbrev
|
||||||
|
*/
|
||||||
|
private AbbrevConfig(int abbrev) {
|
||||||
|
this.abbrev = capAbbrev(abbrev);
|
||||||
|
}
|
||||||
|
|
||||||
|
/**
|
||||||
|
* Get the configured abbreviation length for object ids.
|
||||||
|
*
|
||||||
|
* @return the configured abbreviation length for object ids
|
||||||
|
*/
|
||||||
|
public int get() {
|
||||||
|
return abbrev;
|
||||||
|
}
|
||||||
|
|
||||||
|
@Override
|
||||||
|
public String toString() {
|
||||||
|
return Integer.toString(abbrev);
|
||||||
|
}
|
||||||
|
}
|
|
@ -277,6 +277,54 @@ public int getInt(final String section, String subsection,
|
||||||
defaultValue);
|
defaultValue);
|
||||||
}
|
}
|
||||||
|
|
||||||
|
/**
|
||||||
|
* Obtain an integer value from the configuration which must be inside given
|
||||||
|
* range.
|
||||||
|
*
|
||||||
|
* @param section
|
||||||
|
* section the key is grouped within.
|
||||||
|
* @param name
|
||||||
|
* name of the key to get.
|
||||||
|
* @param minValue
|
||||||
|
* minimum value
|
||||||
|
* @param maxValue
|
||||||
|
* maximum value
|
||||||
|
* @param defaultValue
|
||||||
|
* default value to return if no value was present.
|
||||||
|
* @return an integer value from the configuration, or defaultValue.
|
||||||
|
* @since 6.1
|
||||||
|
*/
|
||||||
|
public int getIntInRange(String section, String name, int minValue,
|
||||||
|
int maxValue, int defaultValue) {
|
||||||
|
return typedGetter.getIntInRange(this, section, null, name, minValue,
|
||||||
|
maxValue, defaultValue);
|
||||||
|
}
|
||||||
|
|
||||||
|
/**
|
||||||
|
* Obtain an integer value from the configuration which must be inside given
|
||||||
|
* range.
|
||||||
|
*
|
||||||
|
* @param section
|
||||||
|
* section the key is grouped within.
|
||||||
|
* @param subsection
|
||||||
|
* subsection name, such a remote or branch name.
|
||||||
|
* @param name
|
||||||
|
* name of the key to get.
|
||||||
|
* @param minValue
|
||||||
|
* minimum value
|
||||||
|
* @param maxValue
|
||||||
|
* maximum value
|
||||||
|
* @param defaultValue
|
||||||
|
* default value to return if no value was present.
|
||||||
|
* @return an integer value from the configuration, or defaultValue.
|
||||||
|
* @since 6.1
|
||||||
|
*/
|
||||||
|
public int getIntInRange(String section, String subsection, String name,
|
||||||
|
int minValue, int maxValue, int defaultValue) {
|
||||||
|
return typedGetter.getIntInRange(this, section, subsection, name,
|
||||||
|
minValue, maxValue, defaultValue);
|
||||||
|
}
|
||||||
|
|
||||||
/**
|
/**
|
||||||
* Obtain an integer value from the configuration.
|
* Obtain an integer value from the configuration.
|
||||||
*
|
*
|
||||||
|
|
|
@ -836,4 +836,11 @@ public final class ConfigConstants {
|
||||||
*/
|
*/
|
||||||
public static final String CONFIG_KEY_DEFAULT = "default";
|
public static final String CONFIG_KEY_DEFAULT = "default";
|
||||||
|
|
||||||
|
/**
|
||||||
|
* The "abbrev" key
|
||||||
|
*
|
||||||
|
* @since 6.1
|
||||||
|
*/
|
||||||
|
public static final String CONFIG_KEY_ABBREV = "abbrev";
|
||||||
|
|
||||||
}
|
}
|
||||||
|
|
|
@ -155,4 +155,14 @@ public ObjectLoader open(AnyObjectId objectId, int typeHint)
|
||||||
public ObjectDatabase newCachedDatabase() {
|
public ObjectDatabase newCachedDatabase() {
|
||||||
return this;
|
return this;
|
||||||
}
|
}
|
||||||
|
|
||||||
|
/**
|
||||||
|
* Get a quick, rough count of objects in this repository. Ignores loose
|
||||||
|
* objects. Returns {@code -1} if an exception occurs.
|
||||||
|
*
|
||||||
|
* @return quick, rough count of objects in this repository, {@code -1} if
|
||||||
|
* an exception occurs
|
||||||
|
* @since 6.1
|
||||||
|
*/
|
||||||
|
public abstract long getApproximateObjectCount();
|
||||||
}
|
}
|
||||||
|
|
Loading…
Reference in New Issue