From 66d151989267e2d052c44bd9a16e112e713aa581 Mon Sep 17 00:00:00 2001
From: CrazyMax <crazy-max@users.noreply.github.com>
Date: Mon, 13 Jun 2022 23:38:52 +0200
Subject: [PATCH 1/3] container based dev flow

---
 .github/workflows/test.yml | 36 +++++++++++++--------------
 Dockerfile                 | 51 ++++++++++++++++++++++++++++++++++++++
 docker-bake.hcl            | 41 ++++++++++++++++++++++++++++++
 3 files changed, 110 insertions(+), 18 deletions(-)
 create mode 100644 Dockerfile
 create mode 100644 docker-bake.hcl

diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index 2146023..3deceb7 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -9,14 +9,24 @@ on:
   pull_request:
 
 jobs:
+  validate:
+    runs-on: ubuntu-latest
+    steps:
+      -
+        name: Checkout
+        uses: actions/checkout@v3
+      -
+        name: Run
+        uses: docker/bake-action@v2
+        with:
+          targets: validate
+
   test:
     runs-on: ubuntu-latest
-    env:
-      GO111MODULE: on
     strategy:
       fail-fast: false
       matrix:
-        go:
+        go_version:
           - 1.13
           - 1.14
           - 1.15
@@ -27,23 +37,13 @@ jobs:
       -
         name: Checkout
         uses: actions/checkout@v3
-      -
-        name: Set up Go
-        uses: actions/setup-go@v3
-        with:
-          go-version: ${{ matrix.go }}
-      -
-        name: Cache Go modules
-        uses: actions/cache@v3
-        with:
-          path: ~/go/pkg/mod
-          key: ${{ runner.os }}-go-${{ matrix.go }}-${{ hashFiles('**/go.sum') }}
-          restore-keys: |
-            ${{ runner.os }}-go-${{ matrix.go }}-
       -
         name: Test
-        run: |
-          go test -coverprofile=coverage.txt -covermode=atomic ./...
+        uses: docker/bake-action@v2
+        with:
+          targets: test
+        env:
+          GO_VERSION: ${{ matrix.go_version }}
       -
         name: Upload coverage
         uses: codecov/codecov-action@v3
diff --git a/Dockerfile b/Dockerfile
new file mode 100644
index 0000000..da064b1
--- /dev/null
+++ b/Dockerfile
@@ -0,0 +1,51 @@
+# syntax=docker/dockerfile:1
+
+ARG GO_VERSION="1.18"
+ARG GOLANGCI_LINT_VERSION="v1.45"
+
+FROM golangci/golangci-lint:${GOLANGCI_LINT_VERSION}-alpine AS golangci-lint
+
+FROM golang:${GO_VERSION}-alpine AS base
+RUN apk add --no-cache gcc git linux-headers musl-dev
+ENV CGO_ENABLED=0
+ENV GO111MODULE=on
+WORKDIR /src
+
+FROM base AS vendored
+RUN --mount=type=bind,target=.,rw \
+  --mount=type=cache,target=/go/pkg/mod \
+  go mod tidy && go mod download && \
+  mkdir /out && cp go.mod go.sum /out
+
+FROM scratch AS vendor-update
+COPY --from=vendored /out /
+
+FROM vendored AS vendor-validate
+RUN --mount=type=bind,target=.,rw <<EOT
+set -e
+git add -A
+cp -rf /out/* .
+diff=$(git status --porcelain -- go.mod go.sum)
+if [ -n "$diff" ]; then
+  echo >&2 'ERROR: Vendor result differs. Please vendor your package with "docker buildx bake vendor"'
+  echo "$diff"
+  exit 1
+fi
+EOT
+
+FROM base AS lint
+RUN --mount=type=bind,target=. \
+  --mount=type=cache,target=/root/.cache \
+  --mount=from=golangci-lint,source=/usr/bin/golangci-lint,target=/usr/bin/golangci-lint \
+  golangci-lint run ./...
+
+FROM vendored AS test
+ENV CGO_ENABLED=1
+RUN --mount=type=bind,target=. \
+  --mount=type=cache,target=/root/.cache \
+  --mount=type=cache,target=/go/pkg/mod \
+  go test -v -coverprofile=/tmp/coverage.txt -covermode=atomic -race ./... && \
+  go tool cover -func=/tmp/coverage.txt
+
+FROM scratch AS test-coverage
+COPY --from=test /tmp/coverage.txt /coverage.txt
diff --git a/docker-bake.hcl b/docker-bake.hcl
new file mode 100644
index 0000000..3e1c4ed
--- /dev/null
+++ b/docker-bake.hcl
@@ -0,0 +1,41 @@
+variable "GO_VERSION" {
+  default = "1.18"
+}
+
+target "_common" {
+  args = {
+    GO_VERSION = GO_VERSION
+  }
+}
+
+group "default" {
+  targets = ["test"]
+}
+
+group "validate" {
+  targets = ["lint", "vendor-validate"]
+}
+
+target "lint" {
+  inherits = ["_common"]
+  target = "lint"
+  output = ["type=cacheonly"]
+}
+
+target "vendor-validate" {
+  inherits = ["_common"]
+  target = "vendor-validate"
+  output = ["type=cacheonly"]
+}
+
+target "vendor-update" {
+  inherits = ["_common"]
+  target = "vendor-update"
+  output = ["."]
+}
+
+target "test" {
+  inherits = ["_common"]
+  target = "test-coverage"
+  output = ["."]
+}

From b9dd88a09195177050f19670ad15cff19244c3b6 Mon Sep 17 00:00:00 2001
From: CrazyMax <crazy-max@users.noreply.github.com>
Date: Mon, 13 Jun 2022 23:41:47 +0200
Subject: [PATCH 2/3] fix lint

---
 loader_flag.go | 1 +
 1 file changed, 1 insertion(+)

diff --git a/loader_flag.go b/loader_flag.go
index 1a7b6f6..6761503 100644
--- a/loader_flag.go
+++ b/loader_flag.go
@@ -7,6 +7,7 @@ import (
 
 // FlagLoader is the structure representring a flag loader.
 type FlagLoader struct {
+	//nolint:structcheck,unused
 	filename string
 	cfg      FlagLoaderConfig
 }

From 25700dce17a61d9d087fca07c3eb7508bfa9535a Mon Sep 17 00:00:00 2001
From: CrazyMax <crazy-max@users.noreply.github.com>
Date: Mon, 13 Jun 2022 23:43:32 +0200
Subject: [PATCH 3/3] remove go 1.13 and 1.14 support

---
 .github/workflows/test.yml | 2 --
 1 file changed, 2 deletions(-)

diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index 3deceb7..da25bd2 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -27,8 +27,6 @@ jobs:
       fail-fast: false
       matrix:
         go_version:
-          - 1.13
-          - 1.14
           - 1.15
           - 1.16
           - 1.17