command: split out and tag code so compilation works on Solaris

The readline library doesn't support Solaris. For now, we'll just not
support console there.

command/console.go

@@ -3,14 +3,12 @@ package command
 import (
 	"bufio"
 	"fmt"
-	"io"
 	"os"
 	"strings"
 
-	"github.com/hashicorp/terraform/helper/wrappedreadline"
+	"github.com/hashicorp/terraform/helper/wrappedstreams"
 	"github.com/hashicorp/terraform/repl"
 
-	"github.com/chzyer/readline"
 	"github.com/mitchellh/cli"
 )
 
@@ -63,8 +61,8 @@ func (c *ConsoleCommand) Run(args []string) int {
 
 	// Setup the UI so we can output directly to stdout
 	ui := &cli.BasicUi{
-		Writer:      c.Stdout(),
-		ErrorWriter: c.Stderr(),
+		Writer:      wrappedstreams.Stdout(),
+		ErrorWriter: wrappedstreams.Stderr(),
 	}
 
 	// IO Loop
@@ -82,7 +80,7 @@ func (c *ConsoleCommand) Run(args []string) int {
 
 func (c *ConsoleCommand) modePiped(session *repl.Session, ui cli.Ui) int {
 	var lastResult string
-	scanner := bufio.NewScanner(c.Stdin())
+	scanner := bufio.NewScanner(wrappedstreams.Stdin())
 	for scanner.Scan() {
 		// Handle it. If there is an error exit immediately
 		result, err := session.Handle(strings.TrimSpace(scanner.Text()))
@@ -101,50 +99,6 @@ func (c *ConsoleCommand) modePiped(session *repl.Session, ui cli.Ui) int {
 	return 0
 }
 
-func (c *ConsoleCommand) modeInteractive(session *repl.Session, ui cli.Ui) int {
-	// Configure input
-	l, err := readline.NewEx(wrappedreadline.Override(&readline.Config{
-		Prompt:            "> ",
-		InterruptPrompt:   "^C",
-		EOFPrompt:         "exit",
-		HistorySearchFold: true,
-	}))
-	if err != nil {
-		c.Ui.Error(fmt.Sprintf(
-			"Error initializing console: %s",
-			err))
-		return 1
-	}
-	defer l.Close()
-
-	for {
-		// Read a line
-		line, err := l.Readline()
-		if err == readline.ErrInterrupt {
-			if len(line) == 0 {
-				break
-			} else {
-				continue
-			}
-		} else if err == io.EOF {
-			break
-		}
-
-		out, err := session.Handle(line)
-		if err == repl.ErrSessionExit {
-			break
-		}
-		if err != nil {
-			ui.Error(err.Error())
-			continue
-		}
-
-		ui.Output(out)
-	}
-
-	return 0
-}
-
 func (c *ConsoleCommand) Help() string {
 	helpText := `
 Usage: terraform console [options] [DIR]

command/console_interactive.go

@@ -0,0 +1,61 @@
+// +build !solaris
+
+// The readline library we use doesn't currently support solaris so
+// we just build tag it off.
+
+package command
+
+import (
+	"fmt"
+	"io"
+
+	"github.com/hashicorp/terraform/helper/wrappedreadline"
+	"github.com/hashicorp/terraform/repl"
+
+	"github.com/chzyer/readline"
+	"github.com/mitchellh/cli"
+)
+
+func (c *ConsoleCommand) modeInteractive(session *repl.Session, ui cli.Ui) int {
+	// Configure input
+	l, err := readline.NewEx(wrappedreadline.Override(&readline.Config{
+		Prompt:            "> ",
+		InterruptPrompt:   "^C",
+		EOFPrompt:         "exit",
+		HistorySearchFold: true,
+	}))
+	if err != nil {
+		c.Ui.Error(fmt.Sprintf(
+			"Error initializing console: %s",
+			err))
+		return 1
+	}
+	defer l.Close()
+
+	for {
+		// Read a line
+		line, err := l.Readline()
+		if err == readline.ErrInterrupt {
+			if len(line) == 0 {
+				break
+			} else {
+				continue
+			}
+		} else if err == io.EOF {
+			break
+		}
+
+		out, err := session.Handle(line)
+		if err == repl.ErrSessionExit {
+			break
+		}
+		if err != nil {
+			ui.Error(err.Error())
+			continue
+		}
+
+		ui.Output(out)
+	}
+
+	return 0
+}

command/console_interactive_solaris.go

@@ -0,0 +1,18 @@
+// +build solaris
+
+package command
+
+import (
+	"fmt"
+
+	"github.com/hashicorp/terraform/repl"
+	"github.com/mitchellh/cli"
+)
+
+func (c *ConsoleCommand) modeInteractive(session *repl.Session, ui cli.Ui) int {
+	ui.Error(fmt.Sprintf(
+		"The readline library Terraform currently uses for the interactive\n" +
+			"console is not supported by Solaris. Interactive mode is therefore\n" +
+			"not supported on Solaris currently."))
+	return 1
+}

command/meta.go

@@ -15,12 +15,11 @@ import (
 	"github.com/hashicorp/terraform/config"
 	"github.com/hashicorp/terraform/config/module"
 	"github.com/hashicorp/terraform/helper/experiment"
-	"github.com/hashicorp/terraform/helper/wrappedreadline"
+	"github.com/hashicorp/terraform/helper/wrappedstreams"
 	"github.com/hashicorp/terraform/state"
 	"github.com/hashicorp/terraform/terraform"
 	"github.com/mitchellh/cli"
 	"github.com/mitchellh/colorstring"
-	"github.com/mitchellh/panicwrap"
 )
 
 // Meta are the meta-options that are available on all or most commands.
@@ -314,7 +313,7 @@ func (m *Meta) Input() bool {
 
 // StdinPiped returns true if the input is piped.
 func (m *Meta) StdinPiped() bool {
-	fi, err := m.Stdin().Stat()
+	fi, err := wrappedstreams.Stdin().Stat()
 	if err != nil {
 		// If there is an error, let's just say its not piped
 		return false
@@ -323,36 +322,6 @@ func (m *Meta) StdinPiped() bool {
 	return fi.Mode()&os.ModeNamedPipe != 0
 }
 
-// Stdin returns the stdin for this command.
-func (m *Meta) Stdin() *os.File {
-	stdin := os.Stdin
-	if panicwrap.Wrapped(nil) {
-		stdin = wrappedreadline.Stdin
-	}
-
-	return stdin
-}
-
-// Stdout returns the stdout for this command.
-func (m *Meta) Stdout() *os.File {
-	stdout := os.Stdout
-	if panicwrap.Wrapped(nil) {
-		stdout = wrappedreadline.Stdout
-	}
-
-	return stdout
-}
-
-// Stderr returns the stderr for this command.
-func (m *Meta) Stderr() *os.File {
-	stderr := os.Stderr
-	if panicwrap.Wrapped(nil) {
-		stderr = wrappedreadline.Stderr
-	}
-
-	return stderr
-}
-
 // contextOpts returns the options to use to initialize a Terraform
 // context with the settings from this Meta.
 func (m *Meta) contextOpts() *terraform.ContextOpts {

helper/wrappedreadline/wrappedreadline.go

@@ -10,38 +10,24 @@
 package wrappedreadline
 
 import (
-	"os"
 	"runtime"
 
 	"github.com/chzyer/readline"
-)
-
-// These are the file descriptor numbers for the original stdin, stdout, stderr
-// streams from the parent process.
-const (
-	StdinFd  = 3
-	StdoutFd = 4
-	StderrFd = 5
-)
 
-// These are the *os.File values for the standard streams.
-var (
-	Stdin  = os.NewFile(uintptr(StdinFd), "stdin")
-	Stdout = os.NewFile(uintptr(StdoutFd), "stdout")
-	Stderr = os.NewFile(uintptr(StderrFd), "stderr")
+	"github.com/hashicorp/terraform/helper/wrappedstreams"
 )
 
 // Override overrides the values in readline.Config that need to be
 // set with wrapped values.
 func Override(cfg *readline.Config) *readline.Config {
-	cfg.Stdin = Stdin
-	cfg.Stdout = Stdout
-	cfg.Stderr = Stderr
+	cfg.Stdin = wrappedstreams.Stdin()
+	cfg.Stdout = wrappedstreams.Stdout()
+	cfg.Stderr = wrappedstreams.Stderr()
 
 	cfg.FuncGetWidth = TerminalWidth
 	cfg.FuncIsTerminal = IsTerminal
 
-	var rm RawMode
+	rm := RawMode{StdinFd: int(wrappedstreams.Stdin().Fd())}
 	cfg.FuncMakeRaw = rm.Enter
 	cfg.FuncExitRaw = rm.Exit
 
@@ -56,7 +42,9 @@ func IsTerminal() bool {
 	}
 
 	// Same implementation as readline but with our custom fds
-	return readline.IsTerminal(StdinFd) && (readline.IsTerminal(StdoutFd) || readline.IsTerminal(StderrFd))
+	return readline.IsTerminal(int(wrappedstreams.Stdin().Fd())) &&
+		(readline.IsTerminal(int(wrappedstreams.Stdout().Fd())) ||
+			readline.IsTerminal(int(wrappedstreams.Stderr().Fd())))
 }
 
 // TerminalWidth gets the terminal width in characters.
@@ -70,11 +58,13 @@ func TerminalWidth() int {
 
 // RawMode is a helper for entering and exiting raw mode.
 type RawMode struct {
+	StdinFd int
+
 	state *readline.State
 }
 
 func (r *RawMode) Enter() (err error) {
-	r.state, err = readline.MakeRaw(StdinFd)
+	r.state, err = readline.MakeRaw(r.StdinFd)
 	return err
 }
 
@@ -83,5 +73,5 @@ func (r *RawMode) Exit() error {
 		return nil
 	}
 
-	return readline.Restore(StdinFd, r.state)
+	return readline.Restore(r.StdinFd, r.state)
 }

helper/wrappedreadline/wrappedreadline_unix.go

@@ -5,13 +5,18 @@ package wrappedreadline
 import (
 	"syscall"
 	"unsafe"
+
+	"github.com/hashicorp/terraform/helper/wrappedstreams"
 )
 
 // getWidth impl for Unix
 func getWidth() int {
-	w := getWidthFd(StdoutFd)
+	stdoutFd := int(wrappedstreams.Stdout().Fd())
+	stderrFd := int(wrappedstreams.Stderr().Fd())
+
+	w := getWidthFd(stdoutFd)
 	if w < 0 {
-		w = getWidthFd(StderrFd)
+		w = getWidthFd(stderrFd)
 	}
 
 	return w

helper/wrappedstreams/streams.go

@@ -0,0 +1,47 @@
+// Package wrappedstreams provides access to the standard OS streams
+// (stdin, stdout, stderr) even if wrapped under panicwrap.
+package wrappedstreams
+
+import (
+	"os"
+
+	"github.com/mitchellh/panicwrap"
+)
+
+// Stdin returns the true stdin of the process.
+func Stdin() *os.File {
+	stdin := os.Stdin
+	if panicwrap.Wrapped(nil) {
+		stdin = wrappedStdin
+	}
+
+	return stdin
+}
+
+// Stdout returns the true stdout of the process.
+func Stdout() *os.File {
+	stdout := os.Stdout
+	if panicwrap.Wrapped(nil) {
+		stdout = wrappedStdout
+	}
+
+	return stdout
+}
+
+// Stderr returns the true stderr of the process.
+func Stderr() *os.File {
+	stderr := os.Stderr
+	if panicwrap.Wrapped(nil) {
+		stderr = wrappedStderr
+	}
+
+	return stderr
+}
+
+// These are the wrapped streams. There doesn't appear to be a negative
+// impact of opening these files even if the file descriptor doesn't exist.
+var (
+	wrappedStdin  = os.NewFile(uintptr(3), "stdin")
+	wrappedStdout = os.NewFile(uintptr(4), "stdout")
+	wrappedStderr = os.NewFile(uintptr(5), "stderr")
+)