switch to github actions (#175)

CircleCI has stopped working when I moved the repo.
Let's take the opportunity to switch to Github Actions.
Circle is deprecated internally and Github Actions is a
good fit for open source projects.

.github/docker-compose.yml

@@ -0,0 +1,101 @@
+version: "3"
+
+services:
+  lint:
+    image: pggen_source
+    environment:
+      LINT: "1"
+      DB_HOST: "postgres13"
+    links:
+      - "postgres13"
+    depends_on:
+      - "postgres13"
+
+  # check the minimum supported go version
+  msgv:
+    image: pggen_source_msgv
+    environment:
+      DB_HOST: "postgres13"
+    links:
+      - "postgres13"
+    depends_on:
+      - "postgres13"
+
+  test13:
+    image: pggen_source
+    environment:
+      DB_HOST: "postgres13"
+    links:
+      - "postgres13"
+    depends_on:
+      - "postgres13"
+
+  test12:
+    image: pggen_source
+    environment:
+      DB_HOST: "postgres12"
+    links:
+      - "postgres12"
+    depends_on:
+      - "postgres12"
+
+  test11:
+    image: pggen_source
+    environment:
+      DB_HOST: "postgres11"
+    links:
+      - "postgres11"
+    depends_on:
+      - "postgres11"
+
+  test10:
+    image: pggen_source
+    environment:
+      DB_HOST: "postgres10"
+    links:
+      - "postgres10"
+    depends_on:
+      - "postgres10"
+
+  test9_6:
+    image: pggen_source
+    environment:
+      DB_HOST: "postgres9_6"
+    links:
+      - "postgres9_6"
+    depends_on:
+      - "postgres9_6"
+
+  test9_5:
+    image: pggen_source
+    environment:
+      DB_HOST: "postgres9_5"
+    links:
+      - "postgres9_5"
+    depends_on:
+      - "postgres9_5"
+
+  postgres13:
+    image: postgres:12
+    environment:
+      POSTGRES_PASSWORD: "test"
+  postgres12:
+    image: postgres:12
+    environment:
+      POSTGRES_PASSWORD: "test"
+  postgres11:
+    image: postgres:11
+    environment:
+      POSTGRES_PASSWORD: "test"
+  postgres10:
+    image: postgres:10
+    environment:
+      POSTGRES_PASSWORD: "test"
+  postgres9_6:
+    image: postgres:9.6
+    environment:
+      POSTGRES_PASSWORD: "test"
+  postgres9_5:
+    image: postgres:9.5
+    environment:
+      POSTGRES_PASSWORD: "test"

.github/workflows/ci.yaml

@@ -0,0 +1,32 @@
+name: CI
+
+on:
+  push:
+    branches: [ master ]
+  pull_request:
+    branches: [ master ]
+
+jobs:
+  tests:
+    runs-on: ubuntu-latest
+
+    strategy:
+      matrix:
+        entrypoint: [ "test13", "test12", "test11", "test10", "test9_6", "test9_5", "lint" ]
+
+    steps:
+      - uses: actions/checkout@v2
+      - name: Build Docker Image
+        run: docker build -t pggen_source .
+      - name: Running Step ${{ matrix.entrypoint }}
+        run: docker-compose --file .github/docker-compose.yml run ${{ matrix.entrypoint }}
+
+  # msgv gets a seperate one since it uses its own entrypoint
+  msgv:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v2
+      - name: Build Docker Image
+        run: docker build -t pggen_source_msgv -f Dockerfile.msgv .
+      - name: Use Postgres ${{ matrix.postgres-version }}
+        run: docker-compose --file .github/docker-compose.yml run msgv

Dockerfile

@@ -1,4 +1,4 @@
-FROM golang:1.15-alpine
+FROM golang:1.16-alpine
 
 # we need postgresql-client so we can set up our database with psql
 # for testing and `go` uses `git` to fetch deps for us. musl-dev

README.md

@@ -1,7 +1,5 @@
 # pggen
 
-[![CircleCI](https://circleci.com/gh/opendoor/pggen.svg?style=svg&circle-token=36f0b47fd6bc10bc883c8831488fa0dcf5dd2b8b)](https://circleci.com/gh/opendoor/pggen)
-
 `pggen` consists of 3 main packages:
   - `github.com/opendoor/pggen/cmd/pggen` is a command line tool to be
      invoked in `go:generate` directives.