Feat/working provider (#1)

* Compiling, but untested provider

* Working applier with happy path test

* Adds tests for everything

* Add GH workflow

* Updates readme with useful info

* Address PR feedback

Author: thomastaylor312

.github/workflows/build.yaml

@@ -0,0 +1,58 @@
+name: Build
+
+on:
+  push:
+    branches: [main]
+  pull_request:
+
+env:
+  CARGO_TERM_COLOR: always
+
+defaults:
+  run:
+    working-directory: applier
+
+jobs:
+  build:
+    runs-on: ${{ matrix.config.os }}
+    strategy:
+      fail-fast: false
+      matrix:
+        config:
+          - { os: "ubuntu-latest" }
+          - { os: "macos-latest" }
+          - { os: "windows-latest" }
+
+    steps:
+      - uses: actions/checkout@v2
+      - name: Install latest Rust stable toolchain
+        uses: actions-rs/toolchain@v1
+        with:
+          toolchain: stable
+          default: true
+          components: clippy, rustfmt
+      - name: Build
+        run: make build
+
+  integration:
+    runs-on: ubuntu-latest
+
+    steps:
+      - uses: actions/checkout@v2
+      - name: Install latest Rust stable toolchain
+        uses: actions-rs/toolchain@v1
+        with:
+          toolchain: stable
+          default: true
+          components: clippy, rustfmt
+      - name: Build
+        run: make build
+      - uses: engineerd/[email protected]
+        with:
+          version: "v0.11.1"
+      # Because we are using rustls-tls, the credentials for the kubernetes cluster can't be a bare IP
+      - name: Use localhost for kubeconfig
+        run: |
+          sed -i 's/127.0.0.1/localhost/g' ~/.kube/config
+      - name: Run tests
+        run: make test