Get newer bump.sh from discogs_client repo

bump.sh

@@ -1,25 +1,32 @@
 #!/bin/bash
+# Wrapper script for bumpversion/bump2version python package.
+# Requires: pip install bump2version
+#
+# Increments major, minor or patch part of version in configured files
+# (.bumpversion.cfg). Can be savely executed to see what would be bumped. To
+# really change and commit, a second cli arg "doit" has to be passed.
 
 #set -x
-DRY="echo"
 PART=$1
 
+which bump2version
+if [ $? != 0 ]; then
+    echo "bump2version package missing."
+    exit 1
+fi
+
 if [ -z $1 ]; then
     echo "Bumps version, commits and tags."
-    echo "Usage: ./bump.s <major|minor|patch> [doit]"
+    echo "Usage: $0 <major|minor|patch> [doit]"
     exit 0
 fi
 
-if [[ "$2" == "doit" ]]; then
-    DRY=""
-else
-    echo -e "\nTHIS IS A DRY-RUN\n"
-fi
-
 if [[ "$2" == "doit" ]]; then
     bumpversion $PART --verbose
-    echo "All good? Then push with:"
+    echo ""
+    echo "All good? Then push commits and tags:"
     echo "git push --follow-tags"
 else
+    echo -e "\nTHIS IS A DRY-RUN\n"
     bumpversion $PART --verbose --dry-run
 fi