improve tar packaging

The generated tar archives contain the uid/gid of the builder,
if unpacked as root on another system those will denote nothing
or an unexpected user/group.

The expectation would be uid/gid = 0.

Use a simple enough tar format as well.

The Mac version of tar (bsdtar?) does not support those flags,
for CI the separate gnu-tar is installed.

Author: nolange

.github/workflows/build.yml

@@ -77,7 +77,7 @@ jobs:
           DISTRO=ubuntu-$(grep DISTRIB_RELEASE /etc/lsb-release | cut -f 2 -d =)-$(uname -m)
           NAME=llvm-mingw-$TAG-ucrt-$DISTRO
           mv llvm-mingw $NAME
-          tar -Jcf ../$NAME.tar.xz $NAME
+          tar -Jcf ../$NAME.tar.xz --format=ustar --numeric-owner --owner=0 --group=0 $NAME
       - uses: actions/upload-artifact@v4
         with:
           name: linux-ucrt-x86_64-toolchain
@@ -124,7 +124,7 @@ jobs:
           DISTRO=ubuntu-$(grep DISTRIB_RELEASE /etc/lsb-release | cut -f 2 -d =)-aarch64
           NAME=llvm-mingw-$TAG-ucrt-$DISTRO
           mv llvm-mingw $NAME
-          tar -Jcf ../$NAME.tar.xz $NAME
+          tar -Jcf ../$NAME.tar.xz --format=ustar --numeric-owner --owner=0 --group=0 $NAME
       - uses: actions/upload-artifact@v4
         with:
           name: linux-ucrt-aarch64-toolchain
@@ -157,7 +157,7 @@ jobs:
           LLVM_CMAKEFLAGS="-DLLVM_ENABLE_LIBXML2=OFF -DLLVM_ENABLE_TERMINFO=OFF" ./build-all.sh $(pwd)/install/llvm-mingw --disable-clang-tools-extra --disable-lldb --enable-asserts
           .github/workflows/store-version.sh install/llvm-mingw/versions.txt
           cd install
-          tar -Jcf ../llvm-mingw-linux.tar.xz llvm-mingw
+          tar -Jcf ../llvm-mingw-linux.tar.xz --format=ustar --numeric-owner --owner=0 --group=0 llvm-mingw
       - uses: actions/upload-artifact@v4
         with:
           name: linux-asserts-toolchain
@@ -178,7 +178,7 @@ jobs:
           MINGW_W64_VERSION: ${{needs.prepare.outputs.MINGW_W64_VERSION}}
           TAG: ${{needs.prepare.outputs.TAG}}
         run: |
-          brew install ninja
+          brew install ninja gnu-tar
           # Disable zstd and python. Both are available on the runners, but
           # installed with homebrew, and only available in the native (x86_64)
           # form. Therefore, autodetection will pick them up, but linking
@@ -189,7 +189,7 @@ jobs:
           cd install
           NAME=llvm-mingw-$TAG-ucrt-macos-universal
           mv llvm-mingw $NAME
-          tar -Jcf ../$NAME.tar.xz $NAME
+          gtar -Jcf ../$NAME.tar.xz --format=ustar --numeric-owner --owner=0 --group=0 $NAME
       - uses: actions/upload-artifact@v4
         with:
           name: macos-ucrt-toolchain
@@ -241,7 +241,7 @@ jobs:
           cd install
           NAME=llvm-mingw-$TAG-ucrt-msys2-${{matrix.sys}}
           mv llvm-mingw $NAME
-          tar -Jcf ../$NAME.tar.xz $NAME
+          tar -Jcf ../$NAME.tar.xz --format=ustar --numeric-owner --owner=0 --group=0 $NAME
       - uses: actions/upload-artifact@v4
         with:
           name: msys2-${{matrix.sys}}-toolchain

.github/workflows/msvcrt.yml

@@ -76,7 +76,7 @@ jobs:
           DISTRO=ubuntu-$(grep DISTRIB_RELEASE /etc/lsb-release | cut -f 2 -d =)-$(uname -m)
           NAME=llvm-mingw-$TAG-msvcrt-$DISTRO
           mv llvm-mingw $NAME
-          tar -Jcf ../$NAME.tar.xz $NAME
+          tar -Jcf ../$NAME.tar.xz --format=ustar --numeric-owner --owner=0 --group=0 $NAME
       - uses: actions/upload-artifact@v4
         with:
           name: linux-msvcrt-x86_64-toolchain

release-macos.sh

@@ -33,7 +33,7 @@ rm -rf $DEST
 time CLEAN=1 SYNC=1 MACOS_REDIST=1 ./build-all.sh $DEST
 dir=$(pwd)
 cd $HOME
-tar -Jcvf $dir/$RELNAME.tar.xz $RELNAME
+gtar -Jcvf $dir/$RELNAME.tar.xz --format=ustar --numeric-owner --owner=0 --group=0 $RELNAME
 rm -rf $RELNAME
 cd $dir
 ls -lh $RELNAME.tar.xz

release.sh

@@ -30,7 +30,7 @@ fi
 time docker build -f Dockerfile . -t mstorsjo/llvm-mingw:latest -t mstorsjo/llvm-mingw:$TAG
 
 DISTRO=ubuntu-20.04-$(uname -m)
-docker run --rm mstorsjo/llvm-mingw:latest sh -c "cd /opt && mv llvm-mingw llvm-mingw-$TAG-ucrt-$DISTRO && tar -Jcvf - llvm-mingw-$TAG-ucrt-$DISTRO" > llvm-mingw-$TAG-ucrt-$DISTRO.tar.xz
+docker run --rm mstorsjo/llvm-mingw:latest sh -c "cd /opt && mv llvm-mingw llvm-mingw-$TAG-ucrt-$DISTRO && tar -Jcvf - --format=ustar --numeric-owner --owner=0 --group=0 llvm-mingw-$TAG-ucrt-$DISTRO" > llvm-mingw-$TAG-ucrt-$DISTRO.tar.xz
 
 if [ -n "$NATIVEONLY" ]; then
     exit 0
@@ -57,7 +57,7 @@ msvcrt_image=llvm-mingw-msvcrt-$(uuidgen)
 temp_images="$temp_images $msvcrt_image"
 time docker build -f Dockerfile.dev -t $msvcrt_image --build-arg DEFAULT_CRT=msvcrt .
 
-docker run --rm $msvcrt_image sh -c "cd /opt && mv llvm-mingw llvm-mingw-$TAG-msvcrt-$DISTRO && tar -Jcvf - llvm-mingw-$TAG-msvcrt-$DISTRO" > llvm-mingw-$TAG-msvcrt-$DISTRO.tar.xz
+docker run --rm $msvcrt_image sh -c "cd /opt && mv llvm-mingw llvm-mingw-$TAG-msvcrt-$DISTRO && tar -Jcvf - --format=ustar --numeric-owner --owner=0 --group=0 llvm-mingw-$TAG-msvcrt-$DISTRO" > llvm-mingw-$TAG-msvcrt-$DISTRO.tar.xz
 
 for arch in i686 x86_64; do
     temp=$(uuidgen)