Silence errors when piping `type | head -1`

libexec/rbenv

@@ -28,7 +28,7 @@ if enable -f "${BASH_SOURCE%/*}"/../libexec/rbenv-realpath.dylib realpath 2>/dev
 else
   [ -z "$RBENV_NATIVE_EXT" ] || abort "failed to load \`realpath' builtin"
 
-  READLINK=$(type -p greadlink readlink | head -1)
+  READLINK=$(type -p greadlink readlink 2>/dev/null | head -1)
   [ -n "$READLINK" ] || abort "cannot find readlink - are you missing GNU coreutils?"
 
   resolve_link() {

libexec/rbenv-help

@@ -42,13 +42,15 @@ extract_initial_comment_block() {
 }
 
 collect_documentation() {
-  local all_awks
-  local first_awk
-  all_awks=$(type -p gawk awk)
-  first_awk=$(head -1 <<<"$all_awks")
+  local awk
+  awk="$(type -p gawk awk 2>/dev/null | head -1)"
+  if [ -z "$awk" ]; then
+    echo "rbenv: cannot find awk" >&2
+    return 1
+  fi
 
   # shellcheck disable=SC2016
-  "$first_awk" '
+  "$awk" '
     /^Summary:/ {
       summary = substr($0, 10)
       next

libexec/rbenv-hooks

@@ -26,7 +26,7 @@ if ! enable -f "${BASH_SOURCE%/*}"/rbenv-realpath.dylib realpath 2>/dev/null; th
     echo "rbenv: failed to load \`realpath' builtin" >&2
     exit 1
   fi
-READLINK=$(type -p greadlink readlink | head -1)
+READLINK=$(type -p greadlink readlink 2>/dev/null | head -1)
 if [ -z "$READLINK" ]; then
   echo "rbenv: cannot find readlink - are you missing GNU coreutils?" >&2
   exit 1

libexec/rbenv-versions

@@ -33,7 +33,7 @@ if ! enable -f "${BASH_SOURCE%/*}"/rbenv-realpath.dylib realpath 2>/dev/null; th
     exit 1
   fi
 
-  READLINK=$(type -p greadlink readlink | head -1)
+  READLINK=$(type -p greadlink readlink 2>/dev/null | head -1)
   if [ -z "$READLINK" ]; then
     echo "rbenv: cannot find readlink - are you missing GNU coreutils?" >&2
     exit 1