Introduce Debian package support.

diff --git a/org.argeo.slc.cms/src/org/argeo/slc/deb/DebFile.java b/org.argeo.slc.cms/src/org/argeo/slc/deb/DebFile.java
new file mode 100644 (file)
index 0000000..c51cea8
--- /dev/null
+++ b/org.argeo.slc.cms/src/org/argeo/slc/deb/DebFile.java
@@ -0,0 +1,136 @@
+package org.argeo.slc.deb;
+
+import java.io.BufferedInputStream;
+import java.io.IOException;
+import java.io.UncheckedIOException;
+import java.net.URL;
+import java.nio.charset.StandardCharsets;
+import java.util.function.Consumer;
+
+import org.apache.commons.compress.archivers.ArchiveEntry;
+import org.apache.commons.compress.archivers.ArchiveInputStream;
+import org.apache.commons.compress.archivers.ar.ArArchiveEntry;
+import org.apache.commons.compress.archivers.ar.ArArchiveInputStream;
+import org.apache.commons.compress.archivers.tar.TarArchiveInputStream;
+import org.apache.commons.compress.compressors.CompressorException;
+import org.apache.commons.compress.compressors.CompressorStreamFactory;
+
+public class DebFile {
+       private URL url;
+
+       public DebFile(URL url) {
+               this.url = url;
+       }
+
+       public void printDataArchive() {
+               openDataArchive((tarIn) -> {
+                       try {
+                               ArchiveEntry entry = null;
+                               while ((entry = tarIn.getNextEntry()) != null) {
+                                       System.out.println(entry.getName());
+                               }
+                       } catch (IOException e) {
+                               throw new UncheckedIOException(e);
+                       }
+               });
+       }
+
+       public void printControlArchive() {
+               openControlArchive((tarIn) -> {
+                       try {
+                               ArchiveEntry entry = null;
+                               while ((entry = tarIn.getNextEntry()) != null) {
+                                       System.out.println(entry.getName());
+                               }
+                       } catch (IOException e) {
+                               throw new UncheckedIOException(e);
+                       }
+               });
+       }
+
+       public void printControlFile() {
+               openControlArchive((tarIn) -> {
+                       try {
+                               ArchiveEntry entry = null;
+                               while ((entry = tarIn.getNextEntry()) != null) {
+                                       if ("./control".equals(entry.getName())) {
+                                               String controlFileStr = new String(tarIn.readAllBytes(), StandardCharsets.UTF_8);
+                                               System.out.println(controlFileStr);
+                                       }
+                               }
+                       } catch (IOException e) {
+                               throw new UncheckedIOException(e);
+                       }
+               });
+       }
+
+       protected void openDataArchive(Consumer<ArchiveInputStream> process) {
+               try (ArArchiveInputStream arIn = new ArArchiveInputStream(new BufferedInputStream(url.openStream()))) {
+                       // order is specified, so we don't verify entry names
+                       ArArchiveEntry debianBinaryEntry = arIn.getNextArEntry();
+                       assert "debian-binary".equals(debianBinaryEntry.getName());
+                       checkVersion(arIn);
+                       arIn.getNextArEntry();// control archive
+                       ArArchiveEntry dataArchiveEntry = arIn.getNextArEntry();
+                       processArArchiveEntry(dataArchiveEntry, arIn, process);
+               } catch (IOException | CompressorException e) {
+                       throw new RuntimeException("Cannot open data archive of " + url, e);
+               }
+       }
+
+       protected void openControlArchive(Consumer<ArchiveInputStream> process) {
+               try (ArArchiveInputStream arIn = new ArArchiveInputStream(new BufferedInputStream(url.openStream()))) {
+                       // order is specified, so we don't verify entry names
+                       ArArchiveEntry debianBinaryEntry = arIn.getNextArEntry();
+                       assert "debian-binary".equals(debianBinaryEntry.getName());
+                       checkVersion(arIn);
+                       ArArchiveEntry controlArchiveEntry = arIn.getNextArEntry();
+                       processArArchiveEntry(controlArchiveEntry, arIn, process);
+               } catch (IOException | CompressorException e) {
+                       throw new RuntimeException("Cannot open control archive of " + url, e);
+               }
+       }
+
+       protected void processArArchiveEntry(ArchiveEntry archiveEntry, ArArchiveInputStream arIn,
+                       Consumer<ArchiveInputStream> process) throws IOException, CompressorException {
+               String dataArchiveName = archiveEntry.getName();
+               String compressionType = null;
+               if (dataArchiveName.endsWith(".xz"))
+                       compressionType = CompressorStreamFactory.XZ;
+               else if (dataArchiveName.endsWith(".gz"))
+                       compressionType = CompressorStreamFactory.GZIP;
+               else if (dataArchiveName.endsWith(".bzip2"))
+                       compressionType = CompressorStreamFactory.BZIP2;
+               else if (dataArchiveName.endsWith(".lzma"))
+                       compressionType = CompressorStreamFactory.LZMA;
+
+               if (compressionType == null) {
+                       try (TarArchiveInputStream tarIn = new TarArchiveInputStream(arIn)) {
+                               process.accept(tarIn);
+                       }
+               } else {
+                       try (TarArchiveInputStream tarIn = new TarArchiveInputStream(
+                                       new CompressorStreamFactory().createCompressorInputStream(compressionType, arIn))) {
+                               process.accept(tarIn);
+                       }
+               }
+       }
+
+       protected void checkVersion(ArArchiveInputStream arIn) throws IOException {
+               String version = new String(arIn.readAllBytes(), StandardCharsets.US_ASCII).trim();
+               if (!"2.0".equals(version))
+                       throw new IllegalStateException("Deb " + version + " is not supported");
+       }
+
+       public static void main(String[] args) throws Exception {
+//             URL url = Paths
+//                             .get(System.getProperty("user.home")+"/qa/git/argeo-qa-unstable/build/repo/deb/platform/2.3/argeo-cms_2.3.18_all.deb")
+//                             .toUri().toURL();
+               URL url = new URL("http://repo.netiket.eu/deb/pool/bullseye/platform/2.3/argeo-cms_2.3.18_all.deb");
+               DebFile debFile = new DebFile(url);
+               debFile.printControlArchive();
+               debFile.printControlFile();
+               debFile.printDataArchive();
+       }
+
+}