ci: setup earthly and vhs (#13)

* ci: setup earthly
* ci: replace custom demo with vhs

Earthfile

@@ -0,0 +1,70 @@
+VERSION 0.8
+
+FROM golang:1.22
+ARG --global BINPATH=/usr/local/bin/
+ARG --global GOCACHE=/go-cache
+
+deps:
+    WORKDIR /src
+    ENV GO111MODULE=on
+    ENV CGO_ENABLED=0
+    COPY go.mod go.sum ./
+    RUN go mod download
+    SAVE ARTIFACT go.mod AS LOCAL go.mod
+    SAVE ARTIFACT go.sum AS LOCAL go.sum
+
+build:
+    FROM +deps
+    COPY main.go .
+    ARG GOOS=linux
+    ARG GOARCH=amd64
+    RUN --mount=type=cache,target=$GOCACHE \
+        go build -ldflags="-w -s" -o krewfile main.go
+    SAVE ARTIFACT krewfile
+
+lint:
+    FROM +deps
+    COPY +golangci-lint/golangci-lint $BINPATH
+    COPY *.go .
+    ARG GOLANGCI_LINT_CACHE=/golangci-cache
+    RUN --mount=type=cache,target=$GOCACHE \
+        --mount=type=cache,target=$GOLANGCI_LINT_CACHE \
+        golangci-lint run -v ./...
+
+test:
+    FROM +deps
+    COPY *.go .
+    ARG GO_TEST="go test"
+    RUN --mount=type=cache,target=$GOCACHE \
+        $GO_TEST ./...
+
+e2e:
+    COPY +krew/krew $BINPATH
+    COPY +build/krewfile $BINPATH
+    RUN echo "stern" > /root/.krewfile
+    RUN krewfile
+    RUN krew list 2>/dev/null | grep "stern" >/dev/null
+
+vhs:
+    FROM ghcr.io/charmbracelet/vhs:v0.9.0
+    RUN apt install -y git
+    COPY +krew/krew $BINPATH
+    ENV PATH="$PATH:/root/.krew/bin"
+    COPY +build/krewfile $BINPATH
+    COPY demo.tape .
+    RUN krew install stern
+    RUN vhs demo.tape
+    SAVE ARTIFACT demo.gif AS LOCAL docs/demo.gif
+
+###########
+# helper
+###########
+
+golangci-lint:
+    FROM golangci/golangci-lint:v1.61.0
+    SAVE ARTIFACT /usr/bin/golangci-lint
+
+krew:
+    FROM +deps
+    RUN go install sigs.k8s.io/krew/cmd/krew@v0.4.4
+    SAVE ARTIFACT /go/bin/krew

README.md

@@ -9,7 +9,7 @@ bundle)](https://github.com/Homebrew/homebrew-bundle) or
 
 ## Demo
 
-![krewfile demo](docs/term-animation.svg)
+![krewfile demo](docs/demo.gif)
 
 ## Usage
 

demo.tape

@@ -0,0 +1,28 @@
+Output demo.gif
+
+Set Theme nord
+Set WindowBar Colorful
+
+Type "krew list"
+Enter
+Sleep 1s
+
+Enter
+Type "echo 'explore' > /root/.krewfile"
+Enter
+Sleep 1s
+
+Enter
+Type "krewfile --help"
+Enter
+Sleep 1s
+
+Enter
+Type "krewfile"
+Enter
+Sleep 5s
+
+Enter
+Type "krew list"
+Enter
+Sleep 2s

shell.nix

@@ -1,20 +1,8 @@
 {pkgs ? import <nixpkgs> {}}:
 pkgs.mkShell {
   packages = with pkgs; [
-    go
-
-    # for terminal gifs
-    nodejs
-    nodePackages.npm
-    pv
-    asciinema
-    (pkgs.writeShellScriptBin "gen-term-animations" ''
-      npx svg-term \
-        --command="bash ./ci/type-command.sh" \
-        --out docs/term-animation.svg \
-        --window=true \
-        --width=80
-    '')
+    go_1_22
+    earthly
   ];
 
   shellHook = '''';