[v6,2/4] devtools: abi and UX changes for test-meson-builds.sh

  This patch adds new features to test-meson-builds.sh that help to make
the process of using the script easier, the patch also includes
changes to make the abi breakage checks more performant.
Changes/Additions:
 - Command line arguments added, the changes are fully backwards
   compatible and all previous environmental variables are still supported
 - All paths supplied by user are converted to absolute paths if they
   are relative as meson has a bug that can sometimes error if a
   relative path is supplied to it.
 - abi check/generation code moved to function to improve readability
 - Only 2 abi checks will now be completed:
    - 1 x86_64 gcc or clang check
    - 1 ARM gcc or clang check
   It is not necessary to check abi breakages in every build
 - abi checks can now make use of prebuilt abi references from a http
   or local source, it is hoped these would be hosted on dpdk.org in
   the future.
Invoke using "./test-meson-builds.sh [-b <build directory>]
   [-a <dpdk tag or latest for abi check>] [-u <uri for abi references>]
   [-d <directory for abi references>]"
 - <build directory>: directory to store builds (relative or absolute)
 - <dpdk tag or latest for abi check>: dpdk tag e.g. "v20.11" or "latest"
 - <uri for abi references>: http location or directory to get prebuilt
   abi references from
 - <directory for abi references>: directory to store abi references
   (relative or absolute)
e.g. "./test-meson-builds.sh -a latest"
If no flags are specified test-meson-builds.sh will run the standard
meson tests with default options unless environmental variables are
specified.

Signed-off-by: Conor Walsh <conor.walsh@intel.com>

---
 devtools/test-meson-builds.sh | 170 +++++++++++++++++++++++++++-------
 1 file changed, 138 insertions(+), 32 deletions(-)
  

On 12/10/2020 14:03, Conor Walsh wrote:
> This patch adds new features to test-meson-builds.sh that help to make
> the process of using the script easier, the patch also includes
> changes to make the abi breakage checks more performant.

Avoid commentary such as the above. 

I reduce the following list of bullets to a single paragraph describing the change. 
The core of this change is to improve build times.
So describe reducing the number of build to 2 and using the pre-build references, and thats it. 

> Changes/Additions:
>  - Command line arguments added, the changes are fully backwards
>    compatible and all previous environmental variables are still supported
>  - All paths supplied by user are converted to absolute paths if they
>    are relative as meson has a bug that can sometimes error if a
>    relative path is supplied to it.
>  - abi check/generation code moved to function to improve readability
>  - Only 2 abi checks will now be completed:
>     - 1 x86_64 gcc or clang check
>     - 1 ARM gcc or clang check
>    It is not necessary to check abi breakages in every build
>  - abi checks can now make use of prebuilt abi references from a http
>    or local source, it is hoped these would be hosted on dpdk.org in
>    the future.

<new line to aid reading>

> Invoke using "./test-meson-builds.sh [-b <build directory>]
>    [-a <dpdk tag or latest for abi check>] [-u <uri for abi references>]
>    [-d <directory for abi references>]"
>  - <build directory>: directory to store builds (relative or absolute)
>  - <dpdk tag or latest for abi check>: dpdk tag e.g. "v20.11" or "latest"
>  - <uri for abi references>: http location or directory to get prebuilt
>    abi references from
>  - <directory for abi references>: directory to store abi references
>    (relative or absolute)
> e.g. "./test-meson-builds.sh -a latest"
> If no flags are specified test-meson-builds.sh will run the standard
> meson tests with default options unless environmental variables are
> specified.
> 
> Signed-off-by: Conor Walsh <conor.walsh@intel.com>
> 
> ---
>  devtools/test-meson-builds.sh | 170 +++++++++++++++++++++++++++-------
>  1 file changed, 138 insertions(+), 32 deletions(-)
> 
> diff --git a/devtools/test-meson-builds.sh b/devtools/test-meson-builds.sh
> index a87de635a..b45506fb0 100755
> --- a/devtools/test-meson-builds.sh
> +++ b/devtools/test-meson-builds.sh
> @@ -1,12 +1,73 @@
>  #! /bin/sh -e
>  # SPDX-License-Identifier: BSD-3-Clause
> -# Copyright(c) 2018 Intel Corporation
> +# Copyright(c) 2018-2020 Intel Corporation
>  
>  # Run meson to auto-configure the various builds.
>  # * all builds get put in a directory whose name starts with "build-"
>  # * if a build-directory already exists we assume it was properly configured
>  # Run ninja after configuration is done.
>  
> +# Get arguments
> +usage()
> +{
> +	echo "Usage: $0
> +	      [-b <build directory>]
> +	      [-a <dpdk tag or latest for abi check>]
> +	      [-u <uri for abi references>]
> +	      [-d <directory for abi references>]" 1>&2; exit 1;
> +}
> +
> +DPDK_ABI_DEFAULT_URI="http://dpdk.org/abi-refs"
> +
> +while getopts "a:u:d:b:h" arg; do
> +	case $arg in
> +	a)
> +		if [ -n "$DPDK_ABI_REF_VERSION" ]; then
> +			echo "DPDK_ABI_REF_VERSION and -a cannot both be set"
> +			exit 1
> +		fi
> +		DPDK_ABI_REF_VERSION=${OPTARG} ;;
> +	u)
> +		if [ -n "$DPDK_ABI_TAR_URI" ]; then
> +			echo "DPDK_ABI_TAR_URI and -u cannot both be set"
> +			exit 1
> +		fi
> +		DPDK_ABI_TAR_URI=${OPTARG} ;;
> +	d)
> +		if [ -n "$DPDK_ABI_REF_DIR" ]; then
> +			echo "DPDK_ABI_REF_DIR and -d cannot both be set"
> +			exit 1
> +		fi
> +		DPDK_ABI_REF_DIR=${OPTARG} ;;
> +	b)
> +		if [ -n "$DPDK_BUILD_TEST_DIR" ]; then
> +			echo "DPDK_BUILD_TEST_DIR and -a cannot both be set"
> +			exit 1
> +		fi
> +		DPDK_BUILD_TEST_DIR=${OPTARG} ;;
> +	h)
> +		usage ;;
> +	*)
> +		usage ;;
> +	esac
> +done
> +
> +if [ -n "$DPDK_ABI_REF_VERSION" ] ; then
> +	if [ "$DPDK_ABI_REF_VERSION" = "latest" ] ; then
> +		DPDK_ABI_REF_VERSION=$(git ls-remote --tags http://dpdk.org/git/dpdk |
> +	        	sed "s/.*\///" | grep -v "r\|{}" |
> +			grep '^[^.]*.[^.]*$' | tail -n 1)
> +	elif [ -z "$(git ls-remote http://dpdk.org/git/dpdk refs/tags/$DPDK_ABI_REF_VERSION)" ] ; then
> +		echo "$DPDK_ABI_REF_VERSION is not a valid DPDK tag"
> +		exit 1
> +	fi
> +fi
> +if [ -z $DPDK_ABI_TAR_URI ] ; then
> +	DPDK_ABI_TAR_URI=$DPDK_ABI_DEFAULT_URI
> +fi
> +# allow the generation script to override value with env var
> +abi_checks_done=${DPDK_ABI_GEN_REF:-0}
> +
>  # set pipefail option if possible
>  PIPEFAIL=""
>  set -o | grep -q pipefail && set -o pipefail && PIPEFAIL=1
> @@ -16,7 +77,11 @@ srcdir=$(dirname $(readlink -f $0))/..
>  
>  MESON=${MESON:-meson}
>  use_shared="--default-library=shared"
> -builds_dir=${DPDK_BUILD_TEST_DIR:-.}
> +builds_dir=${DPDK_BUILD_TEST_DIR:-$srcdir/builds}
> +# ensure path is absolute meson returns error when some paths are relative
> +if echo "$builds_dir" | grep -qv '^/'; then
> +        builds_dir=$srcdir/$builds_dir
> +fi
>  
>  if command -v gmake >/dev/null 2>&1 ; then
>  	MAKE=gmake
> @@ -123,39 +188,49 @@ install_target () # <builddir> <installdir>
>  	fi
>  }
>  
> -build () # <directory> <target compiler | cross file> <meson options>
> +abi_gen_check () # no options
>  {
> -	targetdir=$1
> -	shift
> -	crossfile=
> -	[ -r $1 ] && crossfile=$1 || targetcc=$1
> -	shift
> -	# skip build if compiler not available
> -	command -v ${CC##* } >/dev/null 2>&1 || return 0
> -	if [ -n "$crossfile" ] ; then
> -		cross="--cross-file $crossfile"
> -		targetcc=$(sed -n 's,^c[[:space:]]*=[[:space:]]*,,p' \
> -			$crossfile | tr -d "'" | tr -d '"')
> -	else
> -		cross=
> +	abirefdir=${DPDK_ABI_REF_DIR:-$builds_dir/__reference}/$DPDK_ABI_REF_VERSION
> +	mkdir -p $abirefdir
> +	# ensure path is absolute meson returns error when some are relative
> +	if echo "$abirefdir" | grep -qv '^/'; then
> +		abirefdir=$srcdir/$abirefdir
>  	fi
> -	load_env $targetcc || return 0
> -	config $srcdir $builds_dir/$targetdir $cross --werror $*
> -	compile $builds_dir/$targetdir
> -	if [ -n "$DPDK_ABI_REF_VERSION" ]; then
> -		abirefdir=${DPDK_ABI_REF_DIR:-reference}/$DPDK_ABI_REF_VERSION
> -		if [ ! -d $abirefdir/$targetdir ]; then
> +	if [ ! -d $abirefdir/$targetdir ]; then
> +
> +		# try to get abi reference
> +		if echo "$DPDK_ABI_TAR_URI" | grep -q '^http'; then
> +			if [ $abi_checks_done -gt -1 ]; then
> +				if curl --head --fail --silent \
> +					"$DPDK_ABI_TAR_URI/$DPDK_ABI_REF_VERSION/$targetdir.tar.gz" \
> +					>/dev/null; then
> +					curl -o $abirefdir/$targetdir.tar.gz \
> +					$DPDK_ABI_TAR_URI/$DPDK_ABI_REF_VERSION/$targetdir.tar.gz
> +				fi
> +			fi
> +		elif [ $abi_checks_done -gt -1 ]; then
> +			if [ -f "$DPDK_ABI_TAR_URI/$targetdir.tar.gz" ]; then
> +				cp $DPDK_ABI_TAR_URI/$targetdir.tar.gz \
> +					$abirefdir/
> +			fi
> +		fi
> +		if [ -f "$abirefdir/$targetdir.tar.gz" ]; then
> +			tar -xf $abirefdir/$targetdir.tar.gz \
> +				-C $abirefdir >/dev/null
> +			rm -rf $abirefdir/$targetdir.tar.gz
> +		# if no reference can be found then generate one
> +		else
>  			# clone current sources
>  			if [ ! -d $abirefdir/src ]; then
>  				git clone --local --no-hardlinks \
> -					--single-branch \
> -					-b $DPDK_ABI_REF_VERSION \
> -					$srcdir $abirefdir/src
> +					  --single-branch \
> +					  -b $DPDK_ABI_REF_VERSION \
> +					  $srcdir $abirefdir/src
>  			fi
>  
>  			rm -rf $abirefdir/build
>  			config $abirefdir/src $abirefdir/build $cross \
> -				-Dexamples= $*
> +			       -Dexamples= $*
>  			compile $abirefdir/build
>  			install_target $abirefdir/build $abirefdir/$targetdir
>  			$srcdir/devtools/gen-abi.sh $abirefdir/$targetdir
> @@ -164,17 +239,46 @@ build () # <directory> <target compiler | cross file> <meson options>
>  			find $abirefdir/$targetdir/usr/local -name '*.a' -delete
>  			rm -rf $abirefdir/$targetdir/usr/local/bin
>  			rm -rf $abirefdir/$targetdir/usr/local/share
> +			rm -rf $abirefdir/$targetdir/usr/local/lib
>  		fi
> +	fi
>  
> -		install_target $builds_dir/$targetdir \
> -			$(readlink -f $builds_dir/$targetdir/install)
> -		$srcdir/devtools/gen-abi.sh \
> -			$(readlink -f $builds_dir/$targetdir/install)
> +	install_target $builds_dir/$targetdir \
> +		$(readlink -f $builds_dir/$targetdir/install)
> +	$srcdir/devtools/gen-abi.sh \
> +		$(readlink -f $builds_dir/$targetdir/install)
> +	# check abi if not generating references
> +	if [ -z $DPDK_ABI_GEN_REF ] ; then
>  		$srcdir/devtools/check-abi.sh $abirefdir/$targetdir \
>  			$(readlink -f $builds_dir/$targetdir/install)
>  	fi
>  }
>  
> +build () # <directory> <target compiler | cross file> <meson options>
> +{
> +	targetdir=$1
> +	shift
> +	crossfile=
> +	[ -r $1 ] && crossfile=$1 || targetcc=$1
> +	shift
> +	# skip build if compiler not available
> +	command -v ${CC##* } >/dev/null 2>&1 || return 0
> +	if [ -n "$crossfile" ] ; then
> +		cross="--cross-file $crossfile"
> +		targetcc=$(sed -n 's,^c[[:space:]]*=[[:space:]]*,,p' \
> +			$crossfile | tr -d "'" | tr -d '"')
> +	else
> +		cross=
> +	fi
> +	load_env $targetcc || return 0
> +	config $srcdir $builds_dir/$targetdir $cross --werror $*
> +	compile $builds_dir/$targetdir
> +	if [ -n "$DPDK_ABI_REF_VERSION" ] && [ $abi_checks_done -lt 1 ] ; then
> +		abi_gen_check
> +		abi_checks_done=$((abi_checks_done+1))
> +	fi
> +}
> +
>  if [ "$1" = "-vv" ] ; then
>  	TEST_MESON_BUILD_VERY_VERBOSE=1
>  elif [ "$1" = "-v" ] ; then
> @@ -189,7 +293,7 @@ fi
>  # shared and static linked builds with gcc and clang
>  for c in gcc clang ; do
>  	command -v $c >/dev/null 2>&1 || continue
> -	for s in static shared ; do
> +	for s in shared static ; do
>  		export CC="$CCACHE $c"
>  		build build-$c-$s $c --default-library=$s
>  		unset CC
> @@ -211,6 +315,8 @@ build build-x86-mingw $srcdir/config/x86/cross-mingw -Dexamples=helloworld
>  
>  # generic armv8a with clang as host compiler
>  f=$srcdir/config/arm/arm64_armv8_linux_gcc
> +# run abi checks with 1 arm build
> +abi_checks_done=$((abi_checks_done-1))
>  export CC="clang"
>  build build-arm64-host-clang $f $use_shared
>  unset CC
> @@ -231,7 +337,7 @@ done
>  build_path=$(readlink -f $builds_dir/build-x86-default)
>  export DESTDIR=$build_path/install
>  # No need to reinstall if ABI checks are enabled
> -if [ -z "$DPDK_ABI_REF_VERSION" ]; then
> +if [ -z "$DPDK_ABI_REF_VERSION" ] ; then
>  	install_target $build_path $DESTDIR
>  fi
>  
>