该脚本的主要功能就是创建构建目录并准备一些配置文件,比如conf/local.conf,conf/bblayer.conf
1. 检测BUILDDIR环境变量是否设置好(在本系列分享第二节已经知道:BUILDDIR=poky-sumo-19.0.0/build-arm64):
if [ -z "$BUILDDIR" ]; then echo >&2 "Error: The build directory (BUILDDIR) must be set!" exit 1 fi
2.检测是否本次运行只是需要打印帮助信息:
if [ "$1" = '--help' -o "$1" = '-h' ]; then echo 'Usage: oe-setup-builddir' echo '' echo "OpenEmbedded setup-builddir - setup build directory $BUILDDIR" echo '' exit 2 fi
3. 创建BUILDDIR:
mkdir -p "$BUILDDIR/conf" if [ ! -d "$BUILDDIR" ]; then echo >&2 "Error: The builddir ($BUILDDIR) does not exist!" exit 1 fi if [ ! -w "$BUILDDIR" ]; then echo >&2 "Error: Cannot write to $BUILDDIR, perhaps try sourcing with a writable path? i.e. . oe-init-build-env ~/my-build" exit 1 fi # Attempting removal of sticky,setuid bits from BUILDDIR, BUILDDIR/conf chmod -st "$BUILDDIR" 2>/dev/null || echo "WARNING: unable to chmod $BUILDDIR" chmod -st "$BUILDDIR/conf" 2>/dev/null || echo "WARNING: unable to chmod $BUILDDIR/conf" $ cd "$BUILDDIR"
4. 保存TEMPLATECONF变量到$BUILDDIR/conf/templateconf.cfg:
if [ -f "$BUILDDIR/conf/templateconf.cfg" ]; then TEMPLATECONF=$(cat "$BUILDDIR/conf/templateconf.cfg") fi . $OEROOT/.templateconf if [ ! -f "$BUILDDIR/conf/templateconf.cfg" ]; then echo "$TEMPLATECONF" >"$BUILDDIR/conf/templateconf.cfg" fi
5. 准备bblayers.conf,local.conf,并且显示conf-note.txt文件:
if [ -n "$TEMPLATECONF" ]; then if [ ! -d "$TEMPLATECONF" ]; then # Allow TEMPLATECONF=meta-xyz/conf as a shortcut if [ -d "$OEROOT/$TEMPLATECONF" ]; then TEMPLATECONF="$OEROOT/$TEMPLATECONF" fi if [ ! -d "$TEMPLATECONF" ]; then echo >&2 "Error: TEMPLATECONF value points to nonexistent directory '$TEMPLATECONF'" exit 1 fi fi OECORELAYERCONF="$TEMPLATECONF/bblayers.conf.sample" OECORELOCALCONF="$TEMPLATECONF/local.conf.sample" OECORENOTESCONF="$TEMPLATECONF/conf-notes.txt" fi unset SHOWYPDOC if [ -z "$OECORELOCALCONF" ]; then OECORELOCALCONF="$OEROOT/meta/conf/local.conf.sample" fi if [ ! -r "$BUILDDIR/conf/local.conf" ]; then cat <<EOM You had no conf/local.conf file. This configuration file has therefore been created for you with some default values. You may wish to edit it to, for example, select a different MACHINE (target hardware). See conf/local.conf for more information as common configuration options are commented. EOM cp -f $OECORELOCALCONF "$BUILDDIR/conf/local.conf" SHOWYPDOC=yes fi if [ -z "$OECORELAYERCONF" ]; then OECORELAYERCONF="$OEROOT/meta/conf/bblayers.conf.sample" fi if [ ! -r "$BUILDDIR/conf/bblayers.conf" ]; then cat <<EOM You had no conf/bblayers.conf file. This configuration file has therefore been created for you with some default values. To add additional metadata layers into your configuration please add entries to conf/bblayers.conf. EOM # Put the abosolute path to the layers in bblayers.conf so we can run # bitbake without the init script after the first run # ##COREBASE## is deprecated as it's meaning was inconsistent, but continue # to replace it for compatibility. sed -e "s|##OEROOT##|$OEROOT|g" \ -e "s|##COREBASE##|$OEROOT|g" \ $OECORELAYERCONF > "$BUILDDIR/conf/bblayers.conf" SHOWYPDOC=yes
fi
# Prevent disturbing a new GIT clone in same console
unset OECORELOCALCONF
unset OECORELAYERCONF
# Ending the first-time run message. Show the YP Documentation banner.
if [ ! -z "$SHOWYPDOC" ]; then
cat <<EOM
The Yocto Project has extensive documentation about OE including a reference
manual which can be found at:
http://yoctoproject.org/documentation
For more information about OpenEmbedded see their website:
http://www.openembedded.org/
EOM
# unset SHOWYPDOC
fi
if [ -z "$OECORENOTESCONF" ]; then
OECORENOTESCONF="$OEROOT/meta/conf/conf-notes.txt"
fi
[ ! -r "$OECORENOTESCONF" ] || cat $OECORENOTESCONF
unset OECORENOTESCONF