Source file src/pkg/cmd/api/run.go

     1	// Copyright 2013 The Go Authors. All rights reserved.
     2	// Use of this source code is governed by a BSD-style
     3	// license that can be found in the LICENSE file.
     4	
     5	// +build ignore
     6	
     7	// The run program is invoked via the dist tool.
     8	// To invoke manually: go tool dist test -run api --no-rebuild
     9	package main
    10	
    11	import (
    12		"fmt"
    13		"log"
    14		"os"
    15		"os/exec"
    16		"path/filepath"
    17		"runtime"
    18		"strings"
    19	)
    20	
    21	func goCmd() string {
    22		var exeSuffix string
    23		if runtime.GOOS == "windows" {
    24			exeSuffix = ".exe"
    25		}
    26		path := filepath.Join(runtime.GOROOT(), "bin", "go"+exeSuffix)
    27		if _, err := os.Stat(path); err == nil {
    28			return path
    29		}
    30		return "go"
    31	}
    32	
    33	var goroot string
    34	
    35	func main() {
    36		log.SetFlags(0)
    37		goroot = os.Getenv("GOROOT") // should be set by run.{bash,bat}
    38		if goroot == "" {
    39			log.Fatal("No $GOROOT set.")
    40		}
    41	
    42		apiDir := filepath.Join(goroot, "api")
    43		out, err := exec.Command(goCmd(), "tool", "api",
    44			"-c", findAPIDirFiles(apiDir),
    45			"-next", filepath.Join(apiDir, "next.txt"),
    46			"-except", filepath.Join(apiDir, "except.txt")).CombinedOutput()
    47		if err != nil {
    48			log.Fatalf("Error running API checker: %v\n%s", err, out)
    49		}
    50		fmt.Print(string(out))
    51	}
    52	
    53	// findAPIDirFiles returns a comma-separated list of Go API files
    54	// (go1.txt, go1.1.txt, etc.) located in apiDir.
    55	func findAPIDirFiles(apiDir string) string {
    56		dir, err := os.Open(apiDir)
    57		if err != nil {
    58			log.Fatal(err)
    59		}
    60		defer dir.Close()
    61		fs, err := dir.Readdirnames(-1)
    62		if err != nil {
    63			log.Fatal(err)
    64		}
    65		var apiFiles []string
    66		for _, fn := range fs {
    67			if strings.HasPrefix(fn, "go1") {
    68				apiFiles = append(apiFiles, filepath.Join(apiDir, fn))
    69			}
    70		}
    71		return strings.Join(apiFiles, ",")
    72	}
    73	

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