From b4b1fb69094614f71e45381af3836c9806b21626 Mon Sep 17 00:00:00 2001
From: Guillaume Nodet <gnodet@gmail.com>
Date: Fri, 26 May 2023 14:03:56 +0200
Subject: [PATCH 1/4] Fix build and add a .gitignore

---
 .gitignore |  2 ++
 pom.xml    | 55 +++++++++++++++++++++++++++++++++++++++++++++++++-----
 2 files changed, 52 insertions(+), 5 deletions(-)
 create mode 100644 .gitignore

diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..c507849
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,2 @@
+target
+.idea
diff --git a/pom.xml b/pom.xml
index 01b0d39..5425688 100644
--- a/pom.xml
+++ b/pom.xml
@@ -21,7 +21,14 @@ See the Apache License Version 2.0 for the specific language governing permissio
   <groupId>org.sonatype.plexus</groupId>
   <artifactId>plexus-build-api</artifactId>
   <version>0.0.8-SNAPSHOT</version>
-  
+
+  <scm>
+    <connection>scm:git:https://github.com/codehaus-plexus/plexus-build-api.git</connection>
+    <developerConnection>${project.scm.connection}</developerConnection>
+    <url>https://github.com/codehaus-plexus/plexus-build-api</url>
+    <tag>0.x</tag>
+  </scm>
+
   <dependencies>
     <dependency>
       <groupId>org.codehaus.plexus</groupId>
@@ -36,6 +43,10 @@ See the Apache License Version 2.0 for the specific language governing permissio
     </dependency>
   </dependencies>
 
+  <properties>
+    <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
+  </properties>
+
   <build>
     <resources>
       <resource>
@@ -47,7 +58,7 @@ See the Apache License Version 2.0 for the specific language governing permissio
       <plugin>
         <groupId>org.codehaus.plexus</groupId>
         <artifactId>plexus-maven-plugin</artifactId>
-        <version>1.3.4</version>
+        <version>1.3.8</version>
         <executions>
           <execution>
             <goals>
@@ -56,18 +67,23 @@ See the Apache License Version 2.0 for the specific language governing permissio
           </execution>
         </executions>
       </plugin>
+      <plugin>
+        <groupId>org.apache.maven.plugins</groupId>
+        <artifactId>maven-resources-plugin</artifactId>
+        <version>3.3.1</version>
+      </plugin>
       <plugin>
         <groupId>org.apache.maven.plugins</groupId>
         <artifactId>maven-compiler-plugin</artifactId>
+        <version>3.11.0</version>
         <configuration>
-          <source>1.4</source>
-          <target>1.4</target>
+          <release>8</release>
         </configuration>
       </plugin>
       <plugin>
         <groupId>org.apache.maven.plugins</groupId>
         <artifactId>maven-surefire-plugin</artifactId>
-        <version>2.4.2</version>
+        <version>3.1.0</version>
         <configuration>
           <skipTests>true</skipTests>
         </configuration>
@@ -75,6 +91,7 @@ See the Apache License Version 2.0 for the specific language governing permissio
       <plugin>
         <groupId>org.apache.maven.plugins</groupId>
         <artifactId>maven-jar-plugin</artifactId>
+        <version>3.3.0</version>
         <executions>
           <execution>
             <goals>
@@ -83,6 +100,34 @@ See the Apache License Version 2.0 for the specific language governing permissio
           </execution>
         </executions>
       </plugin>
+      <plugin>
+        <groupId>org.apache.maven.plugins</groupId>
+        <artifactId>maven-javadoc-plugin</artifactId>
+        <version>3.5.0</version>
+        <configuration>
+          <doclint>none</doclint>
+        </configuration>
+      </plugin>
+      <plugin>
+        <groupId>org.apache.maven.plugins</groupId>
+        <artifactId>maven-gpg-plugin</artifactId>
+        <version>3.1.0</version>
+      </plugin>
+      <plugin>
+        <groupId>org.apache.maven.plugins</groupId>
+        <artifactId>maven-release-plugin</artifactId>
+        <version>3.0.0</version>
+      </plugin>
+      <plugin>
+        <groupId>org.apache.maven.plugins</groupId>
+        <artifactId>maven-install-plugin</artifactId>
+        <version>3.1.1</version>
+      </plugin>
+      <plugin>
+        <groupId>org.apache.maven.plugins</groupId>
+        <artifactId>maven-deploy-plugin</artifactId>
+        <version>3.1.1</version>
+      </plugin>
     </plugins>
   </build>
 </project>

From 4d3ad0ae40b8413bae76e8a5d0d8dde30b4d8c05 Mon Sep 17 00:00:00 2001
From: Guillaume Nodet <gnodet@gmail.com>
Date: Fri, 26 May 2023 15:18:01 +0200
Subject: [PATCH 2/4] Add a caching output stream

---
 .../incremental/CachingOutputStream.java      | 151 ++++++++++++++++++
 .../incremental/DefaultBuildContext.java      |   2 +-
 2 files changed, 152 insertions(+), 1 deletion(-)
 create mode 100644 src/main/java/org/sonatype/plexus/build/incremental/CachingOutputStream.java

diff --git a/src/main/java/org/sonatype/plexus/build/incremental/CachingOutputStream.java b/src/main/java/org/sonatype/plexus/build/incremental/CachingOutputStream.java
new file mode 100644
index 0000000..03cdf5e
--- /dev/null
+++ b/src/main/java/org/sonatype/plexus/build/incremental/CachingOutputStream.java
@@ -0,0 +1,151 @@
+package org.sonatype.plexus.build.incremental;
+
+/*
+ * Copyright The Codehaus 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 java.io.File;
+import java.io.IOException;
+import java.io.OutputStream;
+import java.nio.Buffer;
+import java.nio.ByteBuffer;
+import java.nio.channels.FileChannel;
+import java.nio.file.Path;
+import java.nio.file.StandardOpenOption;
+
+/**
+ * Caching OutputStream to avoid overwriting a file with
+ * the same content.
+ */
+class CachingOutputStream extends OutputStream {
+    private final Path path;
+    private FileChannel channel;
+    private ByteBuffer readBuffer;
+    private ByteBuffer writeBuffer;
+    private boolean modified;
+
+    public CachingOutputStream(File path) throws IOException {
+        this(requireNonNull(path).toPath());
+    }
+
+    public CachingOutputStream(Path path) throws IOException {
+        this(path, 32 * 1024);
+    }
+
+    public CachingOutputStream(Path path, int bufferSize) throws IOException {
+        this.path = requireNonNull(path);
+        this.channel =
+                FileChannel.open(path, StandardOpenOption.READ, StandardOpenOption.WRITE, StandardOpenOption.CREATE);
+        this.readBuffer = ByteBuffer.allocate(bufferSize);
+        this.writeBuffer = ByteBuffer.allocate(bufferSize);
+    }
+
+    @Override
+    public void write(int b) throws IOException {
+        if (writeBuffer.remaining() < 1) {
+            ((Buffer) writeBuffer).flip();
+            flushBuffer(writeBuffer);
+            ((Buffer) writeBuffer).clear();
+        }
+        writeBuffer.put((byte) b);
+    }
+
+    @Override
+    public void write(byte[] b) throws IOException {
+        write(b, 0, b.length);
+    }
+
+    @Override
+    public void write(byte[] b, int off, int len) throws IOException {
+        if (writeBuffer.remaining() < len) {
+            ((Buffer) writeBuffer).flip();
+            flushBuffer(writeBuffer);
+            ((Buffer) writeBuffer).clear();
+        }
+        int capacity = writeBuffer.capacity();
+        while (len >= capacity) {
+            flushBuffer(ByteBuffer.wrap(b, off, capacity));
+            off += capacity;
+            len -= capacity;
+        }
+        if (len > 0) {
+            writeBuffer.put(b, off, len);
+        }
+    }
+
+    @Override
+    public void flush() throws IOException {
+        ((Buffer) writeBuffer).flip();
+        flushBuffer(writeBuffer);
+        ((Buffer) writeBuffer).clear();
+        super.flush();
+    }
+
+    private void flushBuffer(ByteBuffer writeBuffer) throws IOException {
+        if (modified) {
+            channel.write(writeBuffer);
+        } else {
+            int len = writeBuffer.remaining();
+            ByteBuffer readBuffer;
+            if (this.readBuffer.capacity() >= len) {
+                readBuffer = this.readBuffer;
+                ((Buffer) readBuffer).clear();
+                readBuffer.limit(len);
+            } else {
+                readBuffer = ByteBuffer.allocate(len);
+            }
+            while (len > 0) {
+                int read = channel.read(readBuffer);
+                if (read <= 0) {
+                    modified = true;
+                    channel.position(channel.position() - readBuffer.position());
+                    channel.write(writeBuffer);
+                    return;
+                }
+                len -= read;
+            }
+            ((Buffer) readBuffer).flip();
+            if (readBuffer.compareTo(writeBuffer) != 0) {
+                modified = true;
+                channel.position(channel.position() - readBuffer.remaining());
+                channel.write(writeBuffer);
+            }
+        }
+    }
+
+    @Override
+    public void close() throws IOException {
+        if (channel.isOpen()) {
+            flush();
+            long position = channel.position();
+            if (position != channel.size()) {
+                modified = true;
+                channel.truncate(position);
+            }
+            channel.close();
+        }
+    }
+
+    public boolean isModified() {
+        return modified;
+    }
+
+    private static <T> T requireNonNull(T t) {
+        if (t == null) {
+            throw new NullPointerException();
+        }
+        return t;
+    }
+}
diff --git a/src/main/java/org/sonatype/plexus/build/incremental/DefaultBuildContext.java b/src/main/java/org/sonatype/plexus/build/incremental/DefaultBuildContext.java
index f82cfd9..7173227 100644
--- a/src/main/java/org/sonatype/plexus/build/incremental/DefaultBuildContext.java
+++ b/src/main/java/org/sonatype/plexus/build/incremental/DefaultBuildContext.java
@@ -51,7 +51,7 @@ public boolean hasDelta(List relpaths) {
   }
 
   public OutputStream newFileOutputStream(File file) throws IOException {
-    return new FileOutputStream(file);
+    return new CachingOutputStream(file);
   }
 
   public Scanner newScanner(File basedir) {

From caf6847f01b92c7e5e4c6f2afe455b72ec117f16 Mon Sep 17 00:00:00 2001
From: Guillaume Nodet <gnodet@gmail.com>
Date: Fri, 26 May 2023 15:18:41 +0200
Subject: [PATCH 3/4] [maven-release-plugin] prepare release
 plexus-build-api-0.0.8

---
 pom.xml | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/pom.xml b/pom.xml
index 5425688..46aa5e0 100644
--- a/pom.xml
+++ b/pom.xml
@@ -20,13 +20,13 @@ See the Apache License Version 2.0 for the specific language governing permissio
   </parent>
   <groupId>org.sonatype.plexus</groupId>
   <artifactId>plexus-build-api</artifactId>
-  <version>0.0.8-SNAPSHOT</version>
+  <version>0.0.8</version>
 
   <scm>
     <connection>scm:git:https://github.com/codehaus-plexus/plexus-build-api.git</connection>
     <developerConnection>${project.scm.connection}</developerConnection>
     <url>https://github.com/codehaus-plexus/plexus-build-api</url>
-    <tag>0.x</tag>
+    <tag>plexus-build-api-0.0.8</tag>
   </scm>
 
   <dependencies>

From 29c2f816ac3ace290678edeaac3cb57dece71520 Mon Sep 17 00:00:00 2001
From: Guillaume Nodet <gnodet@gmail.com>
Date: Fri, 26 May 2023 15:18:43 +0200
Subject: [PATCH 4/4] [maven-release-plugin] prepare for next development
 iteration

---
 pom.xml | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/pom.xml b/pom.xml
index 46aa5e0..2317e7d 100644
--- a/pom.xml
+++ b/pom.xml
@@ -20,13 +20,13 @@ See the Apache License Version 2.0 for the specific language governing permissio
   </parent>
   <groupId>org.sonatype.plexus</groupId>
   <artifactId>plexus-build-api</artifactId>
-  <version>0.0.8</version>
+  <version>0.0.9-SNAPSHOT</version>
 
   <scm>
     <connection>scm:git:https://github.com/codehaus-plexus/plexus-build-api.git</connection>
     <developerConnection>${project.scm.connection}</developerConnection>
     <url>https://github.com/codehaus-plexus/plexus-build-api</url>
-    <tag>plexus-build-api-0.0.8</tag>
+    <tag>0.x</tag>
   </scm>
 
   <dependencies>

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