Root should be writeable

Author: ehuss

src/ci/docker/scripts/cmake.sh

@@ -2,7 +2,7 @@
 set -ex
 
 hide_output() {
-  set +x
+  # set +x
   on_err="
 echo ERROR: An error was encountered with the build.
 cat /tmp/build.log
@@ -15,7 +15,7 @@ exit 1
   trap - ERR
   kill $PING_LOOP_PID
   rm /tmp/build.log
-  set -x
+  # set -x
 }
 
 # LLVM 12 requires CMake 3.13.4 or higher.
@@ -26,10 +26,11 @@ curl -L https://github.com/Kitware/CMake/releases/download/v$CMAKE/cmake-$CMAKE.
 mkdir cmake-build
 cd cmake-build
 ls -al /tmp/build.log || true
-who am i
-../cmake-$CMAKE/configure
-make -j$(nproc)
-make install
+whoami
+echo foo &> /tmp/build.log
+hide_output ../cmake-$CMAKE/configure
+hide_output make -j$(nproc)
+hide_output make install
 
 cd ..
 rm -rf cmake-build