semantically versioning the container

Author: thefringeninja

Dockerfile

@@ -1,10 +1,16 @@
 FROM microsoft/dotnet:2.1.500-sdk-alpine3.7 AS build
 ARG MYGET_API_KEY
 
+WORKDIR /app
+
+COPY .git ./
+
 RUN apk add --no-cache \
   nodejs \
   yarn \
-  libcurl
+  libcurl && \
+  dotnet tool install -g minver-cli --version 1.0.0-alpha.15 && \
+  /root/.dotnet/tools/minver > .version
 
 WORKDIR /app/src
 
@@ -22,10 +28,6 @@ WORKDIR /app/docs
 
 COPY ./docs/package.json ./docs/yarn.lock ./
 
-WORKDIR /app/.git
-
-COPY ./.git .
-
 WORKDIR /app/build
 
 COPY ./build/build.csproj .

build.sh

@@ -1,15 +1,42 @@
 #!/usr/bin/env bash
+
 set -e
 
-DOCKERTAG=${TRAVIS_TAG:-latest}
-BUILD_NUMBER=${TRAVIS_BUILD_NUMBER:-0}
-COMMIT=${TRAVIS_PULL_REQUEST_SHA:-${TRAVIS_COMMIT:-unknown}}
-MINVERBUILDMETADATA="build.${BUILD_NUMBER}.${COMMIT}"
+LOCAL_IMAGE="sql-stream-store-server"
+LOCAL="${LOCAL_IMAGE}:latest"
+
+REMOTE_IMAGE="sql-stream-store/server"
 
 docker build \
-    --build-arg MINVERBUILDMETADATA=$MINVERBUILDMETADATA \
     --build-arg MYGET_API_KEY=$MYGET_API_KEY \
-    --tag sql-stream-store-server:${DOCKERTAG} \
+    --tag ${LOCAL} \
     .
 
-docker images --filter=reference="sql-stream-store-server:${DOCKERTAG}"
+VERSION=$(docker run --entrypoint=cat ${LOCAL} /app/.version)
+
+SEMVER_REGEX="^(0|[1-9][0-9]*)\\.(0|[1-9][0-9]*)\\.(0|[1-9][0-9]*)(\\-[0-9A-Za-z-]+(\\.[0-9A-Za-z-]+)*)?(\\+[0-9A-Za-z-]+(\\.[0-9A-Za-z-]+)*)?$"
+
+[[ $VERSION =~ $SEMVER_REGEX ]]
+
+LATEST="${REMOTE_IMAGE}:latest"
+MAJOR="${REMOTE_IMAGE}:${BASH_REMATCH[1]}"
+MAJOR_MINOR="${REMOTE_IMAGE}:${BASH_REMATCH[1]}.${BASH_REMATCH[2]}"
+MAJOR_MINOR_PATCH="${REMOTE_IMAGE}:${BASH_REMATCH[1]}.${BASH_REMATCH[2]}.${BASH_REMATCH[3]}"
+MAJOR_MINOR_PATCH_PRE="${REMOTE_IMAGE}:${BASH_REMATCH[1]}.${BASH_REMATCH[2]}.${BASH_REMATCH[3]}${BASH_REMATCH[4]}"
+
+if [[ -n $TRAVIS_TAG && -z ${BASH_REMATCH[4]} ]]; then
+    echo "Detected a tag with no prerelease."
+    docker tag $LOCAL $LATEST
+    docker tag $LOCAL $MAJOR_MINOR_PATCH
+    docker tag $LOCAL $MAJOR_MINOR
+    if [[ ${BASH_REMATCH[1]} != "0" ]]; then
+        docker tag $LOCAL $MAJOR
+    else
+        echo "Detected unstable version."
+    fi
+else
+    echo "Detected a prerelease."
+    docker tag $LOCAL $MAJOR_MINOR_PATCH_PRE
+fi
+
+docker images --filter=reference="${REMOTE_IMAGE}"