Fix bazelbuild#2958: Installer should not overwrite bazelrc

Closes bazelbuild#2959.
Ping bazelbuild#2692 for cherry-picking into Bazel 0.5.0.

PiperOrigin-RevId: 155357560

scripts/packages/template_bin.sh

@@ -41,25 +41,20 @@ usage() {
   echo "  --prefix=/some/path set the prefix path (default=/usr/local)." >&2
   echo "  --bin= set the binary folder path (default=%prefix%/bin)." >&2
   echo "  --base= set the base install path (default=%prefix%/lib/bazel)." >&2
-  echo "  --bazelrc= set the path to bazelrc (default=/etc/bazel.bazelrc)." >&2
   echo "  --user configure for user install, expands to:" >&2
-  echo '      --bin=$HOME/bin --base=$HOME/.bazel --bazelrc=$HOME/.bazelrc' >&2
+  echo '      --bin=$HOME/bin --base=$HOME/.bazel' >&2
   exit 1
 }
 
 prefix="/usr/local"
 bin="%prefix%/bin"
 base="%prefix%/lib/bazel"
-bazelrc="/etc/bazel.bazelrc"
 
 for opt in "${@}"; do
   case $opt in
     --prefix=*)
       prefix="$(echo "$opt" | cut -d '=' -f 2-)"
       ;;
-    --bazelrc=*)
-      bazelrc="$(echo "$opt" | cut -d '=' -f 2-)"
-      ;;
     --bin=*)
       bin="$(echo "$opt" | cut -d '=' -f 2-)"
       ;;
@@ -69,7 +64,6 @@ for opt in "${@}"; do
     --user)
       bin="$HOME/bin"
       base="$HOME/.bazel"
-      bazelrc="$HOME/.bazelrc"
       ;;
     *)
       usage
@@ -79,7 +73,6 @@ done
 
 bin="${bin//%prefix%/${prefix}}"
 base="${base//%prefix%/${prefix}}"
-bazelrc="${bazelrc//%prefix%/${prefix}}"
 
 test_write() {
   local file="$1"
@@ -133,7 +126,6 @@ fi
 # Test for write access
 test_write "${bin}"
 test_write "${base}"
-test_write "${bazelrc}"
 
 # Do the actual installation
 echo -n "Uncompressing."
@@ -159,17 +151,7 @@ echo -n .
 ln -s "${base}/bin/bazel" "${bin}/bazel"
 echo -n .
 
-if [ -f "${bazelrc}" ]; then
-  echo
-  echo "${bazelrc} already exists, moving it to ${bazelrc}.bak."
-  mv "${bazelrc}" "${bazelrc}.bak"
-fi
-
-# Not necessary, but this way it matches the Debian package.
-touch "${bazelrc}"
-if [ "${UID}" -eq 0 ]; then
-  chmod 0644 "${bazelrc}"
-else
+if [ "${UID}" -ne 0 ]; then
   # Uncompress the bazel base install for faster startup time
   "${bin}/bazel" help >/dev/null
 fi