ccache for obs build

0002-ccache-for-obs-build.patch

@@ -0,0 +1,68 @@
+diff --git a/build b/build
+index 6f1b474..5191c0d 100755
+--- a/build
++++ b/build
+@@ -434,6 +434,7 @@ cleanup_and_exit () {
+ 	umount -n $BUILD_ROOT/dev/pts 2>/dev/null || true
+ 	umount -n $BUILD_ROOT/dev/shm 2>/dev/null || true
+ 	umount -n $BUILD_ROOT/sys 2>/dev/null || true
++	umount -n $BUILD_ROOT/home/abuild/.ccache 2>/dev/null || true
+ 	test -n "$VM_ROOT" -a "$VM_ROOT" != 1 && umount $BUILD_ROOT 2>/dev/null || true
+ 	test -n "$VM_TYPE" && vm_cleanup
+     fi
+@@ -1360,6 +1361,7 @@ for RECIPEFILE in "${RECIPEFILES[@]}" ; do
+     mkdir -p $BUILD_ROOT/home/abuild/.m2
+     chown $ABUILD_UID:$ABUILD_GID $BUILD_ROOT/home/abuild/.m2
+     cp $BUILD_DIR/settings.xml $BUILD_ROOT/home/abuild/.m2/
++	build-ccache "$BUILD_ROOT" "$REASON" "$ABUILD_UID" "$ABUILD_GID"
+ 	BUILD_USER_ABUILD_USED=true
+     else
+ 	# building as root
+diff --git a/build-ccache b/build-ccache
+new file mode 100755
+index 0000000..7293d01
+--- /dev/null
++++ b/build-ccache
+@@ -0,0 +1,42 @@
++#!/bin/bash
++# Script to setup ccache.  
++#
++# BUILD_ROOT        here the packages will be built
++# REASON            here the reason of the build
++#                   eg: "building {package} for '{project}' repository '{repository}' arch '{arch}' srcmd5 '{md5}'
++#
++################################################################
++
++BUILD_ROOT=$1
++REASON=$2
++ABUILD_UID=$3
++ABUILD_GID=$4
++
++CCACHE_HOME_DIR=/home/abuild/.ccache
++
++package=`echo $REASON |awk '{print $2}'`
++project=`echo $REASON |awk '{print $5}'`
++project=${project//\'/}
++
++# check ccache
++if [[ -d /srv/ccache/$project ]] && [[ -e $BUILD_ROOT/usr/bin/ccache ]] && [[ ! -z $project ]] && [[ ! -z $package ]]
++then
++    # openjdk-11 excluded
++    if [[ $package == "openjdk-11" ]]
++    then
++        exit
++    fi
++
++    echo "Building $package for $project using ccache"
++
++    # mount ccache home dir to obs-worker directory
++    mkdir -p ${BUILD_ROOT}${CCACHE_HOME_DIR}
++    chown $ABUILD_UID:$ABUILD_GID ${BUILD_ROOT}${CCACHE_HOME_DIR}
++    mount --bind /srv/ccache/$project ${BUILD_ROOT}${CCACHE_HOME_DIR}
++
++    # link all compilers to ccache
++    cp $BUILD_ROOT/usr/bin/ccache $BUILD_ROOT/usr/local/bin
++    for compiler in $(ls $BUILD_ROOT/usr/bin | grep -E '^(cc|gcc|[cg][+][+]|clang|clang[+][+])([-]?[234][.]?[0-9])*$'); do
++        ln -sf ccache $BUILD_ROOT/usr/local/bin/$compiler
++    done
++fi

obs-build.spec

@@ -1,12 +1,13 @@
 Name:           build
 Version:        20191114
-Release:        324.5
+Release:        324.6
 Summary:        A tool to build binary packages
 License:        GPL-2.0-only OR GPL-3.0-only
 Url:            https://github.com/openSUSE/obs-build
 Source:         obs-build-%{version}.tar.gz
 Patch0000:      0001-modify-for-obs-build.patch
 Patch0001:      0001-add-settings.patch
+Patch0002:      0002-ccache-for-obs-build.patch
 BuildArch:      noarch
 Requires:       bash binutils perl tar psmisc build-mkbaselibs
 BuildRequires:  bash binutils perl psmisc tar