Rework build script to support publishing too

build.sh

@@ -1,16 +1,23 @@
 #!/bin/bash
-set -e
+set -e -o pipefail
 
-# Helper for building the images locally
-
-branch="$1"
-if [ -z "$branch" ]; then
-  branch="$(git branch --no-color | grep \* | cut -d ' ' -f2)"
-fi
 ./cp-static.sh
+tag=$(git describe --tags)
+echo "Building $tag"
 
-for base in alpine baseimage; do
-  cd "py3-$base"
-  docker build . -t "stevearc/pypicloud:$branch-$base" -t "stevearc/pypicloud:local-$base"
-  cd ..
-done
+docker build --pull py3-baseimage -t "stevearc/pypicloud:latest" -t "stevearc/pypicloud:$tag"
+docker build --pull py3-alpine -t "stevearc/pypicloud:latest-alpine" -t "stevearc/pypicloud:$tag-alpine"
+
+if [ "$1" == '--publish' ]; then
+  if [ -n "$(git status --porcelain)" ]; then
+    git status
+    echo ""
+    echo "Repo is not clean. Refusing to publish."
+    exit 1
+  fi
+  git describe --tags --exact-match
+  docker push "stevearc/pypicloud:latest"
+  docker push "stevearc/pypicloud:$tag"
+  docker push "stevearc/pypicloud:latest-alpine"
+  docker push "stevearc/pypicloud:$tag-alpine"
+fi