build(task): replace Make and PowerShell with Task

It will be good to have a single cross-platform build file.
We currently have two, `Makefile` and `test.ps1`.
They are complex enough
we should avoid maintaining both at the same time.

.github/workflows/ci.yml

@@ -32,22 +32,40 @@ jobs:
           version: ${{ matrix.os.version }}
           shell: bash
           run: |
-            sudo .github/workflows/install-deps.sh
-            make test
+            case "$(uname)" in
+              FreeBSD)
+                sudo pkg install -y go
+                ;;
+              NetBSD)
+                sudo pkgin -y install go
+
+                for bin in /usr/pkg/bin/go1*; do
+                  src=$bin
+                done
+                sudo ln -s "$src" /usr/pkg/bin/go
+                ;;
+              OpenBSD)
+                doas pkg_add -I go
+                ;;
+            esac
+
+            go install github.com/go-task/task/v3/cmd/task@latest
+            task
 
   linux:
     runs-on: ubuntu-latest
     steps:
     - name: Checkout
       uses: actions/checkout@v4
 
-    - name: Install dependencies
-      run: |
-        sudo .github/workflows/install-deps.sh
+    - name: Set up Task
+      uses: arduino/setup-task@v2
+      with:
+        version: 3.x
 
-    - name: Test
+    - name: Build and test
       run: |
-        make test
+        task
 
   mac:
     runs-on: macos-latest
@@ -57,11 +75,16 @@ jobs:
 
     - name: Install dependencies
       run: |
-        .github/workflows/install-deps.sh
+        brew install go
+
+    - name: Set up Task
+      uses: arduino/setup-task@v2
+      with:
+        version: 3.x
 
     - name: Build and test
       run: |
-        make test
+        task
 
   windows:
     runs-on: windows-latest
@@ -72,9 +95,14 @@ jobs:
     - name: Checkout
       uses: actions/checkout@v4
 
-    - name: Test
+    - name: Set up Task
+      uses: arduino/setup-task@v2
+      with:
+        version: 3.x
+
+    - name: Build and test
       run: |
-        .\test.ps1
+        task
 
     - name: Upload Windows binary
       uses: actions/upload-artifact@v4

.gitignore

@@ -1,5 +1,6 @@
 /attic/
 /dist/
+/.task/
 
 *.bak
 *.exe

README.md

@@ -28,7 +28,7 @@ go install github.com/dbohdan/recur/v2@latest
 ## Build requirements
 
 - Go 1.19
-- POSIX Make for testing
+- [Task](https://taskfile.dev/) (go-task)
 
 Note that up-to-date code is in the directory [`v2/`](v2/)
 according to the [Go convention](https://go.dev/blog/v2-go-modules).

README.template.md

@@ -28,7 +28,7 @@ go install github.com/dbohdan/recur/v2@latest
 ## Build requirements
 
 - Go 1.19
-- POSIX Make for testing
+- [Task](https://taskfile.dev/) (go-task)
 
 Note that up-to-date code is in the directory [`v2/`](v2/)
 according to the [Go convention](https://go.dev/blog/v2-go-modules).

taskfile.yml

@@ -0,0 +1,143 @@
+version: '3'
+
+vars:
+  dist_dir: dist/
+  subdir: v2
+  test_binaries:
+    - test/env
+    - test/exit99
+    - test/hello
+    - test/sleep
+
+env:
+  CGO_ENABLED: 0
+
+tasks:
+  default:
+    deps:
+      - all
+
+  all:
+    desc: 'Build and test everything'
+    deps:
+      - build_readme
+      - test
+
+  build:
+    desc: 'Build all components'
+    deps:
+      - build_readme
+      - build_binaries
+
+  build_binaries:
+    desc: 'Build all necessary binaries'
+    deps:
+      - build_recur
+      - build_test_binaries
+
+  build_binary:
+    desc: 'Build a single Go binary'
+    internal: true
+    cmds:
+      - go build -o {{.out | q}} {{.src | q}}
+
+  build_readme:
+    desc: 'Generate README.md from template'
+    deps:
+      - build_recur
+    dir: '{{.subdir}}'
+    cmds:
+      - go run ../script/render_template.go < ../README.template.md > ../README.md
+    status:
+      - README.template.md
+      - '{{.subdir}}/main.go'
+    generates:
+      - README.md
+
+  build_recur:
+    desc: 'Build the recur binary'
+    cmds:
+      - task: build_binary
+        vars:
+          out: '{{.subdir | q}}/recur'
+          src: ./{{.subdir | q}}/main.go
+    sources:
+      - '{{.subdir}}/main.go'
+    generates:
+      - '{{.subdir}}/recur'
+
+  build_test_binaries:
+    desc: 'Build all test binaries'
+    deps:
+      - build_test_env
+      - build_test_exit99
+      - build_test_hello
+      - build_test_sleep
+
+  build_test_env:
+    cmds:
+      - task: build_binary
+        vars:
+          src: test/env.go
+          out: test/env
+    sources:
+      - test/env.go
+    generates:
+      - test/env
+
+  build_test_exit99:
+    cmds:
+      - task: build_binary
+        vars:
+          src: test/exit99.go
+          out: test/exit99
+    sources:
+      - test/exit99.go
+    generates:
+      - test/exit99
+
+  build_test_hello:
+    cmds:
+      - task: build_binary
+        vars:
+          src: test/hello.go
+          out: test/hello
+    sources:
+      - test/hello.go
+    generates:
+      - test/hello
+
+  build_test_sleep:
+    cmds:
+      - task: build_binary
+        vars:
+          src: test/sleep.go
+          out: test/sleep
+    sources:
+      - test/sleep.go
+    generates:
+      - test/sleep
+
+  clean:
+    desc: 'Clean up generated files and binaries'
+    cmds:
+      - rm -f README.md
+      - rm -f {{.subdir | q}}/recur
+      - rm -f {{range .test_binaries}}{{. | q}} {{end}}
+
+  release:
+    desc: 'Prepare a release'
+    dir: '{{.subdir}}'
+    cmds:
+      - go run ../script/release.go
+      - mkdir -p ../{{.dist_dir | q}}
+      - mv dist/* ../{{.dist_dir | q}}
+      - rmdir dist/
+
+  test:
+    desc: 'Run tests'
+    deps:
+      - build_binaries
+    dir: '{{.subdir}}'
+    cmds:
+      - go test