use correct dir for creation of icecream env

/var/run might point to the absolute path /run. Thus any commands
referencing $BUILD_ROOT/var/run are actually using the hosts /run
directory, whereas the "cd" tries to change to the nonexisting
/run/icecream directory and fails.

This is a cherry-pick from upstream:
https://github.com/openSUSE/obs-build/commit/21359a6ebcbacdb1754a7c4339a7cca7e496e52f

Change-Id: Ibb87b525f115c5f9435c18db9c72773ca058d8ff
Signed-off-by: Stefan Brüns <stefan.bruens@rwth-aachen.de>
Signed-off-by: Julien Isorce <j.isorce@samsung.com>

diff --git a/build b/build
index 68acb06..80571bf 100755 (executable)
--- a/build
+++ b/build
@@ -489,8 +489,12 @@ setupccache()
 
 setupicecream()
 {
+    local icecreamdir="/var/run/icecream"
+    if test `readlink "$BUILD_ROOT/var/run"` = '/run' ; then
+        icecreamdir="/run/icecream"
+    fi
     if [ "$icecream" -eq 0 ]; then
-       rm -rf "$BUILD_ROOT/var/run/icecream"
+       rm -rf "$BUILD_ROOT$icecreamdir"
        rm -f "$BUILD_ROOT/etc/profile.d/build_icecream.sh"
        return
     fi
@@ -509,7 +513,7 @@ setupicecream()
        echo 'export CCACHE_PATH=/usr/lib/icecc/bin:/opt/icecream/bin' > "$BUILD_ROOT"/etc/profile.d/build_icecream.sh
     fi
 
-    local icecc_vers=(`shopt -s nullglob; echo $BUILD_ROOT/var/run/icecream/*.tar.{bz2,gz}`)
+    local icecc_vers=(`shopt -s nullglob; echo $BUILD_ROOT$icecreamdir/*.tar.{bz2,gz}`)
     icecc_vers=${icecc_vers//$BUILD_ROOT/}
 
     # XXX use changelog like autobuild does instead?
@@ -521,8 +525,8 @@ setupicecream()
        -o "$BUILD_ROOT/usr/bin/as" -nt "$BUILD_ROOT/$icecc_vers" \
        -o "$BUILD_ROOT/lib/libc.so.6" -nt "$BUILD_ROOT/$icecc_vers" ]
     then
-       rm -rf "$BUILD_ROOT/var/run/icecream"
-       mkdir -p "$BUILD_ROOT/var/run/icecream"
+       rm -rf "$BUILD_ROOT$icecreamdir"
+       mkdir -p "$BUILD_ROOT$icecreamdir"
        if [ -e "$BUILD_ROOT"/usr/bin/create-env ]; then
          createenv=/usr/bin/create-env
        elif [ -e "$BUILD_ROOT"/usr/lib/icecc/icecc-create-env ]; then
@@ -534,9 +538,11 @@ setupicecream()
          false
          return
        fi
-       chroot $BUILD_ROOT bash -c "cd /var/run/icecream; $createenv" || cleanup_and_exit 1
-       icecc_vers=(`shopt -s nullglob; echo $BUILD_ROOT/var/run/icecream/*.tar.{bz2,gz}`)
+        echo "creating new env in '$icecreamdir'"
+       chroot $BUILD_ROOT bash -c "cd $icecreamdir; $createenv" || cleanup_and_exit 1
+       icecc_vers=(`shopt -s nullglob; echo $BUILD_ROOT/$icecreamdir/*.tar.{bz2,gz}`)
        icecc_vers=${icecc_vers//$BUILD_ROOT/}
+       echo "created icecream environment $icecc_vers"
     else
        echo "reusing existing icecream environment $icecc_vers"
     fi