release: a better changelog

release

@@ -6,8 +6,8 @@ _err(){ >&2 echo "ERROR: $*"; exit 1; }
 git status --porcelain | grep -q "" &&
     _err "working tree is dirty, commit your changes first."
 
-[[ "$1" =~ ^v([0-9]+)\.([0-9]+)(\.([0-9]+))?$ ]] || \
-    _err "arg1 accepts the following formats: v1.0 v1.0.0"
+[[ "$1" =~ ^v([0-9]+)\.([0-9]+)(\.([0-9]+))?(-rc([0-9]+))?$ ]] || \
+    _err "arg1 accepts the following formats: v1.0 v1.0.0 v1.0-rc1 v1.0.1-rc1"
 
 git tag | grep -q "^$1$" &&
     _err "tag $1 already exists"
@@ -21,5 +21,5 @@ last_tag=$(git tag | tail -1)
     echo undocker "$1"
     echo
     echo Changelog since "$last_tag":
-    git log --pretty=format:"- [%cn] %s" "$last_tag"..HEAD
+    git log --pretty=format:"- [%an] %s" "$last_tag"..HEAD
 } | git tag -u motiejus@jakstys.lt -F - "$1"