shadow: add support for windows

cmd/xgo/shadow/exclude_path.go

@@ -0,0 +1,22 @@
+package main
+
+import (
+	"fmt"
+)
+
+func excludeInList(dir string, path string, list []string) ([]string, error) {
+	n := len(list)
+	j := 0
+	for i := 0; i < n; i++ {
+		d := list[i]
+		if d == dir {
+			continue
+		}
+		list[j] = d
+		j++
+	}
+	if j == n {
+		return nil, fmt.Errorf("xgo shadow not found in PATH: %s", path)
+	}
+	return list[:j], nil
+}

cmd/xgo/shadow/prepare_unix.go

@@ -4,30 +4,20 @@
 package main
 
 import (
-	"fmt"
 	"os"
 	"path/filepath"
 	"strings"
 )
 
 func exclude(dir string) (func(), error) {
 	path := os.Getenv("PATH")
-
 	list := filepath.SplitList(path)
-	n := len(list)
-	j := 0
-	for i := 0; i < n; i++ {
-		d := list[i]
-		if d == dir {
-			continue
-		}
-		list[j] = d
-		j++
-	}
-	if j == n {
-		return nil, fmt.Errorf("xgo shadow not found in PATH: %s", dir)
+
+	newList, err := excludeInList(dir, path, list)
+	if err != nil {
+		return nil, err
 	}
-	os.Setenv("PATH", strings.Join(list[:j], string(filepath.ListSeparator)))
+	os.Setenv("PATH", strings.Join(newList, string(filepath.ListSeparator)))
 	return func() {
 		os.Setenv("PATH", path)
 	}, nil

cmd/xgo/shadow/prepare_windows.go

@@ -4,11 +4,24 @@
 package main
 
 import (
-	"fmt"
+	"os"
+	"path/filepath"
+	"strings"
 )
 
-var xgo_shadow int = "not support windows yet"
+// test on powershell:
+//  $env:path="C:\Users\xhd2015\.xgo\shadow;"+$env:path
 
 func exclude(dir string) (func(), error) {
-	return nil, fmt.Errorf("windows not supported")
+	path := os.Getenv("path")
+	list := filepath.SplitList(path)
+
+	newList, err := excludeInList(dir, path, list)
+	if err != nil {
+		return nil, err
+	}
+	os.Setenv("path", strings.Join(newList, string(filepath.ListSeparator)))
+	return func() {
+		os.Setenv("path", path)
+	}, nil
 }

cmd/xgo/version.go

@@ -4,8 +4,8 @@ import "fmt"
 
 // auto updated
 const VERSION = "1.0.44"
-const REVISION = "5a3329d7a88d9360bd34c434b2a4902fa302fdce+1"
-const NUMBER = 288
+const REVISION = "53e47a022cd9314ede199ca6b70066352c6cec0f+1"
+const NUMBER = 289
 
 // manually updated
 const CORE_VERSION = "1.0.43"