[Do NOT merge AS-IS] Windows CMD.exe based runner sample impl

engine/compiler/script.go

@@ -8,6 +8,7 @@ import (
 	"github.com/drone-runners/drone-runner-docker/engine"
 	"github.com/drone-runners/drone-runner-docker/engine/compiler/shell"
 	"github.com/drone-runners/drone-runner-docker/engine/compiler/shell/powershell"
+	"github.com/drone-runners/drone-runner-docker/engine/compiler/shell/wincmd"
 	"github.com/drone-runners/drone-runner-docker/engine/resource"
 )
 
@@ -17,7 +18,7 @@ func setupScript(src *resource.Step, dst *engine.Step, os string) {
 	if len(src.Commands) > 0 {
 		switch os {
 		case "windows":
-			setupScriptWindows(src, dst)
+			setupScriptWindowsCmd(src, dst)
 		default:
 			setupScriptPosix(src, dst)
 		}
@@ -26,13 +27,32 @@ func setupScript(src *resource.Step, dst *engine.Step, os string) {
 
 // helper function configures the pipeline script for the
 // windows operating system.
-func setupScriptWindows(src *resource.Step, dst *engine.Step) {
+// WIP, BROKEN
+func setupScriptWindowsCmd(src *resource.Step, dst *engine.Step) {
+	dst.Entrypoint = []string{"cmd", "/S", "/c"}
+	dst.Command = []string{`\drone\drone-build-script.cmd`}
+	dst.Envs["DRONE_SCRIPT"] = wincmd.Script(src.Commands)
+	dst.Envs["SHELL"] = "cmd.exe"
+}
+
+// helper function configures the pipeline script for the
+// windows operating system.
+func setupScriptWindowsPowershell(src *resource.Step, dst *engine.Step) {
 	dst.Entrypoint = []string{"powershell", "-noprofile", "-noninteractive", "-command"}
 	dst.Command = []string{"echo $Env:DRONE_SCRIPT | iex"}
 	dst.Envs["DRONE_SCRIPT"] = powershell.Script(src.Commands)
 	dst.Envs["SHELL"] = "powershell.exe"
 }
 
+// helper function configures the pipeline script for the
+// windows operating system.
+func setupScriptWindowsPwsh(src *resource.Step, dst *engine.Step) {
+	dst.Entrypoint = []string{"pwsh", "-noprofile", "-noninteractive", "-command"}
+	dst.Command = []string{"echo $Env:DRONE_SCRIPT | iex"}
+	dst.Envs["DRONE_SCRIPT"] = powershell.Script(src.Commands)
+	dst.Envs["SHELL"] = "pwsh.exe"
+}
+
 // helper function configures the pipeline script for the
 // linux operating system.
 func setupScriptPosix(src *resource.Step, dst *engine.Step) {

engine/compiler/shell/powershell/powershell.go

@@ -39,7 +39,7 @@ if ($Env:DRONE_NETRC_MACHINE) {
 machine $Env:DRONE_NETRC_MACHINE
 login $Env:DRONE_NETRC_USERNAME
 password $Env:DRONE_NETRC_PASSWORD
-"@ > (Join-Path $Env:USERPROFILE '_netrc');
+"@ > (Join-Path $Env:USERPROFILE '.netrc');
 }
 [Environment]::SetEnvironmentVariable("DRONE_NETRC_USERNAME", $null);
 [Environment]::SetEnvironmentVariable("DRONE_NETRC_PASSWORD", $null);

engine/compiler/shell/wincmd/wincmd.go

@@ -0,0 +1,48 @@
+// Package wincmd provides functions for converting shell
+// commands to cmd scripts.
+package wincmd
+
+import (
+	"bytes"
+)
+
+// Script converts a slice of individual shell commands to
+// a cmd script.
+func Script(commands []string) string {
+	buf := new(bytes.Buffer)
+
+	// ignore first linebreak
+	buf.WriteString(optionScript)
+
+	for _, command := range commands {
+		buf.WriteString("echo +--------------------------------\n")
+		buf.WriteString("echo + " + command + "\n")
+		buf.WriteString(command)
+		buf.WriteString(`
+set LastErrorLevel=%ErrorLevel%
+if %LastErrorLevel% gtr 0 (
+  echo ERROR: %LastErrorLevel% 
+  exit /b %LastErrorLevel%
+)` + "\n")
+		buf.WriteString("echo.\n")
+	}
+
+	return buf.String()
+}
+
+// optionScript is a helper script this is added to the build
+// to set shell options, in this case, to exit on error.
+const optionScript = `
+@echo off
+if .%DRONE_NETRC_MACHINE%. neq .. (
+  type nul > %USERPROFILE%\.netrc
+  echo machine %DRONE_NETRC_MACHINE% >> %USERPROFILE%\.netrc
+  echo login %DRONE_NETRC_USERNAME% >> %USERPROFILE%\.netrc
+  echo password %DRONE_NETRC_PASSWORD% >> %USERPROFILE%\.netrc
+)
+set DRONE_NETRC_USERNAME=
+set DRONE_NETRC_PASSWORD=
+set DRONE_NETRC_FILE=
+set DRONE_SCRIPT=
+
+`

engine/engine.go

@@ -5,6 +5,9 @@
 package engine
 
 import (
+	"archive/tar"
+	"bufio"
+	"bytes"
 	"context"
 	"io"
 	"io/ioutil"
@@ -18,6 +21,7 @@ import (
 	"github.com/drone/runner-go/logger"
 	"github.com/drone/runner-go/pipeline/runtime"
 	"github.com/drone/runner-go/registry/auths"
+	"github.com/sirupsen/logrus"
 
 	"github.com/docker/docker/api/types"
 	"github.com/docker/docker/api/types/container"
@@ -198,6 +202,32 @@ func (e *Docker) Run(ctx context.Context, specv runtime.Spec, stepv runtime.Step
 	if err != nil {
 		return nil, errors.TrimExtraInfo(err)
 	}
+
+	// Copy init script to container only on windows
+	if spec.Platform.OS == "windows" && step.Envs["SHELL"] == "cmd.exe" {
+		if step.Name != "clone" {
+			fileContent := []byte(step.Envs["DRONE_SCRIPT"])
+
+			hdr := &tar.Header{
+				Name: "/drone/drone-build-script.cmd",
+				Size: int64(len(fileContent)),
+			}
+
+			tarBuf := new(bytes.Buffer)
+			tw := tar.NewWriter(tarBuf)
+
+			tw.WriteHeader(hdr)
+			io.Copy(tw, bytes.NewReader(fileContent))
+			tw.Close()
+
+			err = e.client.CopyToContainer(ctx, step.ID, "/", bufio.NewReader(tarBuf), types.CopyToContainerOptions{})
+			if err != nil {
+				logrus.Errorln(hdr.Name + ": " + err.Error())
+			} else {
+				logrus.Debugln("Copied build script: " + hdr.Name)
+			}
+		}
+	}
 	// start the container
 	err = e.start(ctx, step.ID)
 	if err != nil {