🆕 invoke gist-paste when gist unavailable

The gist package installed via apt
under Ubuntu 20.04
uses gist-paste as the exectuable instead of gist.

Thus gister will invoke gist-paste instead if gist is not found in PATH.

bin/gister

@@ -11,6 +11,13 @@ else
  DATE=date
 fi
 
+# Ubuntu compatibility
+if type gist > /dev/null; then
+ GIST=gist
+else
+ GIST=gist-paste
+fi
+
 help() {
 cat<<'END'
 gister -- shell script to access https://gist.github.com
@@ -340,7 +347,7 @@ publish() {
  else
  gist_argv=$@
  # post gist and open it in browser
- gist -c -d "$gist_description" $gist_argv
+ $GIST -c -d "$gist_description" $gist_argv
  # record the id
  local gist_id=$(get_paste | grep -o -E '/[0-9a-f]+$' | $SED -e 's/\///')
  # add a record
@@ -392,7 +399,7 @@ init() {
  if ! test -f $HOME/.gist; then
  echo 'We need your username and password to get an OAuth2 token (with the "gist" permission).'
  echo 'We will not store your password.'
- gist --login
+ $GIST --login
  echo 'Your GitHub OAuth2 token is stored at ~/.gist'
  fi
  # store