\t is a GNU extension in sed regexes; fixed / use --color only when ls supports it

1 files changed, 9 insertions, 2 deletions

diff --git a/lib/keyringer/functions b/lib/keyringer/functions
index e3f89d9..b1e2e08 100755
--- a/lib/keyringer/functions
+++ b/lib/keyringer/functions
@@ -537,7 +537,12 @@ function keyringer_show_actions {
 
 # Usage
 function keyringer_usage {
-  local keyrings="$(ls --color=never `dirname $CONFIG` | sed -e 's/config//' | xargs)"
+  # are we're using an `ls` that supports `--color`?
+  if ls --version 2>/dev/null; then
+    local keyrings="$(ls --color=never `dirname $CONFIG` | sed -e 's/config//' | xargs)"
+  else
+    local keyrings="$(ls `dirname $CONFIG` | sed -e 's/config//' | xargs)"
+  fi
 
   printf "Keyringer $KEYRINGER_VERSION\n"
   printf "Usage: keyringer <keyring> <action> [arguments]\n\n"
@@ -552,7 +557,9 @@ function keyringer_usage {
   if [ ! -z "$keyrings" ] && [ -z "$1" ]; then
     printf "\tinit <path> [remote]\n" $BASENAME
   fi
-  keyringer_show_actions | sed -e 's/^/\t/'
+  # \t is a GNU extension
+  # https://stackoverflow.com/questions/8400602/sed-replace-literal-tab
+  keyringer_show_actions | sed -e "`printf 's/^/\t/'`"
   printf "\n"
 }