ci: Use tar.xz format for Linux and macOS build artifacts

This commit updates the CI workflow to output .tar.xz archives for the
Linux and macOS build artifacts.

The XZ format uses the LZMA compression algorithm, which offers
significantly improved data compression ratio.

Note that the `-T0` XZ option is used to perform multi-threaded
compression in spite of reduced compression ratio; otherwise,
compressing the distribution bundle may take tens of minutes to
complete.

For more details, refer to the issue #567.

Signed-off-by: Stephanos Ioannidis <root@stephanos.io>

.github/workflows/ci.yml

@@ -216,7 +216,7 @@ jobs:
               "name": "linux-x86_64",
               "runner": "zephyr_runner",
               "container": "ghcr.io/zephyrproject-rtos/sdk-build:v1.2.3",
-              "archive": "tar.gz"
+              "archive": "tar.xz"
             },'
         fi
 
@@ -225,7 +225,7 @@ jobs:
               "name": "linux-aarch64",
               "runner": "zephyr_runner",
               "container": "ghcr.io/zephyrproject-rtos/sdk-build:v1.2.3",
-              "archive": "tar.gz"
+              "archive": "tar.xz"
             },'
         fi
 
@@ -234,7 +234,7 @@ jobs:
               "name": "macos-x86_64",
               "runner": "zephyr_runner-macos-x86_64",
               "container": "",
-              "archive": "tar.gz"
+              "archive": "tar.xz"
             },'
         fi
 
@@ -243,7 +243,7 @@ jobs:
               "name": "macos-aarch64",
               "runner": "zephyr_runner-macos-x86_64",
               "container": "",
-              "archive": "tar.gz"
+              "archive": "tar.xz"
             },'
         fi
 
@@ -289,7 +289,7 @@ jobs:
               "runner": "ubuntu-20.04",
               "container": "",
               "bundle-host": "linux-x86_64",
-              "bundle-archive": "tar.gz"
+              "bundle-archive": "tar.xz"
             },'
         fi
 
@@ -299,7 +299,7 @@ jobs:
               "runner": "macos-11",
               "container": "",
               "bundle-host": "macos-x86_64",
-              "bundle-archive": "tar.gz"
+              "bundle-archive": "tar.xz"
             },'
         fi
 
@@ -754,8 +754,9 @@ jobs:
         ARCHIVE_NAME=toolchain_${{ matrix.host.name }}_${{ matrix.target }}
         ARCHIVE_FILE=${ARCHIVE_NAME}.${{ matrix.host.archive }}
 
-        if [ "${{ matrix.host.archive }}" == "tar.gz" ]; then
-          ${TAR} -zcvf ${ARCHIVE_FILE} \
+        if [ "${{ matrix.host.archive }}" == "tar.xz" ]; then
+          XZ_OPT="-T0" \
+          ${TAR} -Jcvf ${ARCHIVE_FILE} \
                  --owner=0 --group=0 -C ${OUTPUT_BASE}/${OUTPUT_DIR} ${{ matrix.target }}
         elif [ "${{ matrix.host.archive }}" == "zip" ]; then
           pushd ${OUTPUT_BASE}/${OUTPUT_DIR}
@@ -918,9 +919,10 @@ jobs:
         ARTIFACT=${ARTIFACT[0]}
         ARTIFACT=$(basename ${ARTIFACT})
         ARCHIVE_NAME=hosttools_${{ matrix.host.name }}
-        ARCHIVE_FILE=hosttools_${{ matrix.host.name }}.tar.gz
+        ARCHIVE_FILE=hosttools_${{ matrix.host.name }}.tar.xz
 
-        ${TAR} -zcvf ${ARCHIVE_FILE} --owner=0 --group=0 \
+        XZ_OPT="-T0" \
+        ${TAR} -Jcvf ${ARCHIVE_FILE} --owner=0 --group=0 \
                -C ${ARTIFACT_ROOT} ${ARTIFACT}
 
         # Compute checksum
@@ -1024,8 +1026,9 @@ jobs:
         ARCHIVE_NAME=cmake_${{ matrix.host.name }}
         ARCHIVE_FILE=${ARCHIVE_NAME}.${{ matrix.host.archive }}
 
-        if [ "${{ matrix.host.archive }}" == "tar.gz" ]; then
-          ${TAR} -zcvf ${ARCHIVE_FILE} --owner=0 --group=0 \
+        if [ "${{ matrix.host.archive }}" == "tar.xz" ]; then
+          XZ_OPT="-T0" \
+          ${TAR} -Jcvf ${ARCHIVE_FILE} --owner=0 --group=0 \
                  -C . cmake
         elif [ "${{ matrix.host.archive }}" == "zip" ]; then
           zip -r ${ARCHIVE_FILE} \
@@ -1130,8 +1133,8 @@ jobs:
 
         echo "BUNDLE_ARCHIVE_NAME=${ARCHIVE_NAME}" >> $GITHUB_ENV
 
-        if [ "${{ matrix.host.archive }}" == "tar.gz" ]; then
-          EXTRACT="${TAR} -zxvf"
+        if [ "${{ matrix.host.archive }}" == "tar.xz" ]; then
+          EXTRACT="${TAR} -Jxvf"
         elif [ "${{ matrix.host.archive }}" == "zip" ]; then
           EXTRACT="unzip"
         fi
@@ -1182,8 +1185,9 @@ jobs:
         popd
 
         # Create minimal (without toolchains) distribution bundle archive
-        if [ "${{ matrix.host.archive }}" == "tar.gz" ]; then
-          ${TAR} -zcvf ${ARCHIVE_NAME}_minimal.${EXT} --owner=0 --group=0 \
+        if [ "${{ matrix.host.archive }}" == "tar.xz" ]; then
+          XZ_OPT="-T0" \
+          ${TAR} -Jcvf ${ARCHIVE_NAME}_minimal.${EXT} --owner=0 --group=0 \
                  -C . ${ARCHIVE_DIR}
         elif [ "${{ matrix.host.archive }}" == "zip" ]; then
           zip -r ${ARCHIVE_NAME}_minimal.${EXT} ${ARCHIVE_DIR}
@@ -1211,8 +1215,9 @@ jobs:
         popd
 
         # Create full distribution bundle archive
-        if [ "${{ matrix.host.archive }}" == "tar.gz" ]; then
-          ${TAR} -zcvf ${ARCHIVE_NAME}.${EXT} --owner=0 --group=0 \
+        if [ "${{ matrix.host.archive }}" == "tar.xz" ]; then
+          XZ_OPT="-T0" \
+          ${TAR} -Jcvf ${ARCHIVE_NAME}.${EXT} --owner=0 --group=0 \
                  -C . ${ARCHIVE_DIR}
         elif [ "${{ matrix.host.archive }}" == "zip" ]; then
           zip -r ${ARCHIVE_NAME}.${EXT} ${ARCHIVE_DIR}
@@ -1377,8 +1382,8 @@ jobs:
 
         # Extract distribution bundle archive
         BUNDLE_FILE=${BUNDLE_NAME}.${{ matrix.testenv.bundle-archive }}
-        if [ "${{ matrix.testenv.bundle-archive }}" == "tar.gz" ]; then
-          ${TAR} -zxvf ${ARTIFACT_ROOT}/${BUNDLE_FILE} -C tools
+        if [ "${{ matrix.testenv.bundle-archive }}" == "tar.xz" ]; then
+          ${TAR} -Jxvf ${ARTIFACT_ROOT}/${BUNDLE_FILE} -C tools
         elif [ "${{ matrix.testenv.bundle-archive }}" == "zip" ]; then
           unzip ${ARTIFACT_ROOT}/${BUNDLE_FILE} -d tools
         fi

scripts/template_setup_posix

@@ -185,7 +185,7 @@ esac
 
 # Resolve release download base URI
 dl_rel_base="https://github.com/zephyrproject-rtos/sdk-ng/releases/download/v${version}"
-dl_toolchain_filename='toolchain_${host}_${toolchain}.tar.gz'
+dl_toolchain_filename='toolchain_${host}_${toolchain}.tar.xz'
 
 # Print banner
 echo "Zephyr SDK ${version} Setup"