added bash package

shell/bash/bash.go

@@ -0,0 +1,52 @@
+// Copyright 2019 Drone.IO Inc. All rights reserved.
+// Use of this source code is governed by the Parity Public License
+// that can be found in the LICENSE file.
+
+// Package shell provides functions for converting shell commands
+// to shell scripts.
+package bash
+
+import (
+	"bytes"
+	"fmt"
+	"strings"
+)
+
+// Suffix provides the shell script suffix. For posix systems
+// this value is an empty string.
+const Suffix = ""
+
+// Command returns the shell command and arguments.
+func Command() (string, []string) {
+	return "/bin/sh", []string{"-e"}
+}
+
+// Script converts a slice of individual shell commands to
+// a posix-compliant shell script.
+func Script(commands []string) string {
+	buf := new(bytes.Buffer)
+	fmt.Fprintln(buf)
+	fmt.Fprintf(buf, optionScript)
+	fmt.Fprintln(buf)
+	for _, command := range commands {
+		escaped := fmt.Sprintf("%q", command)
+		escaped = strings.Replace(escaped, "$", `\$`, -1)
+		buf.WriteString(fmt.Sprintf(
+			traceScript,
+			escaped,
+			command,
+		))
+	}
+	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 = "set -e"
+
+// traceScript is a helper script that is added to
+// the build script to trace a command.
+const traceScript = `
+echo + %s
+%s
+`

shell/bash/bash_test.go

@@ -0,0 +1,43 @@
+// Copyright 2019 Drone.IO Inc. All rights reserved.
+// Use of this source code is governed by the Parity Public License
+// that can be found in the LICENSE file.
+
+package bash
+
+import (
+	"reflect"
+	"testing"
+)
+
+func TestCommands(t *testing.T) {
+	cmd, args := Command()
+	{
+		got, want := cmd, "/bin/sh"
+		if !reflect.DeepEqual(got, want) {
+			t.Errorf("Want command %v, got %v", want, got)
+		}
+	}
+	{
+		got, want := args, []string{"-e"}
+		if !reflect.DeepEqual(got, want) {
+			t.Errorf("Want command %v, got %v", want, got)
+		}
+	}
+}
+
+func TestScript(t *testing.T) {
+	got, want := Script([]string{"go build", "go test"}), exampleScript
+	if got != want {
+		t.Errorf("Want %q, got %q", want, got)
+	}
+}
+
+var exampleScript = `
+set -e
+
+echo + "go build"
+go build
+
+echo + "go test"
+go test
+`

shell/shell.go

@@ -4,51 +4,20 @@
 
 // +build !windows
 
-// Package shell provides functions for converting shell commands
-// to shell scripts.
 package shell
 
-import (
-	"bytes"
-	"fmt"
-	"strings"
-)
+import "github.com/drone/runner-go/shell/bash"
 
-// Suffix provides the shell script suffix. For posix systems
-// this value is an empty string.
+// Suffix provides the shell script suffix.
 const Suffix = ""
 
-// Command returns the shell command and arguments.
+// Command returns the powershell command and arguments.
 func Command() (string, []string) {
-	return "/bin/sh", []string{"-e"}
+	return bash.Command()
 }
 
 // Script converts a slice of individual shell commands to
-// a posix-compliant shell script.
+// a powershell script.
 func Script(commands []string) string {
-	buf := new(bytes.Buffer)
-	fmt.Fprintln(buf)
-	fmt.Fprintf(buf, optionScript)
-	fmt.Fprintln(buf)
-	for _, command := range commands {
-		escaped := fmt.Sprintf("%q", command)
-		escaped = strings.Replace(escaped, "$", `\$`, -1)
-		buf.WriteString(fmt.Sprintf(
-			traceScript,
-			escaped,
-			command,
-		))
-	}
-	return buf.String()
+	return bash.Script(commands)
 }
-
-// optionScript is a helper script this is added to the build
-// to set shell options, in this case, to exit on error.
-const optionScript = "set -e"
-
-// traceScript is a helper script that is added to
-// the build script to trace a command.
-const traceScript = `
-echo + %s
-%s
-`