Add support for Zopfli compression.

.github/workflows/build.yml

@@ -32,7 +32,7 @@ jobs:
       if: matrix.container == 'ubuntu:latest'
       run: |
         apt update
-        apt -y install git make pbzip2 binutils bzip2 zstd gnupg openssl
+        apt -y install git make pbzip2 binutils bzip2 zstd gnupg openssl zopfli
 
     - name: Install RockyLinux packages
       if: matrix.container == 'rockylinux:9'
@@ -42,7 +42,7 @@ jobs:
 
     - name: Install Alpine packages
       if: matrix.container == 'alpine:latest'
-      run: apk add --no-cache bash git make libarchive-tools gnupg coreutils binutils bzip2 zstd openssl
+      run: apk add --no-cache bash git make libarchive-tools gnupg coreutils binutils bzip2 zstd openssl zopfli
 
     - name: Install macOS packages
       if: runner.os == 'macOS'

makeself.1

@@ -50,6 +50,9 @@ Compress using lz4.
 .B --pigz
 Compress using pigz.
 .TP
+.B --zopfli
+Compress using zopfli.
+.TP
 .B --zstd
 Compress using zstd.
 .TP

makeself.sh

@@ -62,6 +62,7 @@ MS_Usage()
     echo "    --quiet | -q       : Do not print any messages other than errors."
     echo "    --gzip             : Compress using gzip (default if detected)"
     echo "    --pigz             : Compress with pigz"
+    echo "    --zopfli           : Compress with zopfli"
     echo "    --zstd             : Compress with zstd"
     echo "    --bzip2            : Compress using bzip2 instead of gzip"
     echo "    --pbzip2           : Compress using pbzip2 instead of gzip"
@@ -217,6 +218,10 @@ do
         COMPRESS=pigz
         shift
         ;;
+    --zopfli)
+        COMPRESS=zopfli
+        shift
+        ;;
     --zstd)
         COMPRESS=zstd
         shift
@@ -512,6 +517,10 @@ pigz)
     fi
     GUNZIP_CMD="gzip -cd"
     ;;
+zopfli)
+    GZIP_CMD="zopfli -c"
+    GUNZIP_CMD="gzip -cd"
+    ;;
 zstd)
     GZIP_CMD="zstd -$COMPRESS_LEVEL"
     if test $THREADS -ne $DEFAULT_THREADS; then # Leave as the default if threads not indicated

test/extracttest

@@ -58,6 +58,16 @@ testZstd()
   assertEquals $? 0
 }
 
+testZopfli()
+{
+  # Skip if zopfli is not available
+  command -v zopfli >/dev/null 2>&1 || startSkipping
+  setupTests --zopfli
+
+  ./makeself-test.run --check
+  assertEquals $? 0
+}
+
 # Load and run shUnit2.
 source "./shunit2/shunit2"