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util.go
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util.go
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// Copyright 2016-2018, Pulumi Corporation.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package integration
import (
"fmt"
"io"
"io/ioutil"
"os"
"os/exec"
"path"
"path/filepath"
"strings"
"time"
"github.com/pkg/errors"
"github.com/pulumi/pulumi/sdk/v2/go/common/resource"
"github.com/pulumi/pulumi/sdk/v2/go/common/util/contract"
)
// DecodeMapString takes a string of the form key1=value1:key2=value2 and returns a go map.
func DecodeMapString(val string) (map[string]string, error) {
newMap := make(map[string]string)
if val != "" {
for _, overrideClause := range strings.Split(val, ":") {
data := strings.Split(overrideClause, "=")
if len(data) != 2 {
return nil, errors.Errorf(
"could not decode %s as an override, should be of the form <package>=<version>", overrideClause)
}
packageName := data[0]
packageVersion := data[1]
newMap[packageName] = packageVersion
}
}
return newMap, nil
}
// ReplaceInFile does a find and replace for a given string within a file.
func ReplaceInFile(old, new, path string) error {
rawContents, err := ioutil.ReadFile(path)
if err != nil {
return err
}
newContents := strings.Replace(string(rawContents), old, new, -1)
return ioutil.WriteFile(path, []byte(newContents), os.ModePerm)
}
// getCmdBin returns the binary named bin in location loc or, if it hasn't yet been initialized, will lazily
// populate it by either using the default def or, if empty, looking on the current $PATH.
func getCmdBin(loc *string, bin, def string) (string, error) {
if *loc == "" {
*loc = def
if *loc == "" {
var err error
*loc, err = exec.LookPath(bin)
if err != nil {
return "", errors.Wrapf(err, "Expected to find `%s` binary on $PATH", bin)
}
}
}
return *loc, nil
}
func uniqueSuffix() string {
// .<timestamp>.<five random hex characters>
timestamp := time.Now().Format("20060102-150405")
suffix, err := resource.NewUniqueHex("."+timestamp+".", 5, -1)
contract.AssertNoError(err)
return suffix
}
const (
commandOutputFolderName = "command-output"
)
func writeCommandOutput(commandName, runDir string, output []byte) (string, error) {
logFileDir := filepath.Join(runDir, commandOutputFolderName)
if err := os.MkdirAll(logFileDir, 0700); err != nil {
return "", errors.Wrapf(err, "Failed to create '%s'", logFileDir)
}
logFile := filepath.Join(logFileDir, commandName+uniqueSuffix()+".log")
if err := ioutil.WriteFile(logFile, output, 0600); err != nil {
return "", errors.Wrapf(err, "Failed to write '%s'", logFile)
}
return logFile, nil
}
// CopyFile copies a single file from src to dst
// From https://blog.depado.eu/post/copy-files-and-directories-in-go
func CopyFile(src, dst string) error {
var err error
var srcfd *os.File
var dstfd *os.File
var srcinfo os.FileInfo
if srcfd, err = os.Open(src); err != nil {
return err
}
defer srcfd.Close()
if dstfd, err = os.Create(dst); err != nil {
return err
}
defer dstfd.Close()
if _, err = io.Copy(dstfd, srcfd); err != nil {
return err
}
if srcinfo, err = os.Stat(src); err != nil {
return err
}
return os.Chmod(dst, srcinfo.Mode())
}
// CopyDir copies a whole directory recursively
// From https://blog.depado.eu/post/copy-files-and-directories-in-go
func CopyDir(src, dst string) error {
var err error
var fds []os.FileInfo
var srcinfo os.FileInfo
if srcinfo, err = os.Stat(src); err != nil {
return err
}
if err = os.MkdirAll(dst, srcinfo.Mode()); err != nil {
return err
}
if fds, err = ioutil.ReadDir(src); err != nil {
return err
}
for _, fd := range fds {
srcfp := path.Join(src, fd.Name())
dstfp := path.Join(dst, fd.Name())
if fd.IsDir() {
if err = CopyDir(srcfp, dstfp); err != nil {
fmt.Println(err)
}
} else {
if err = CopyFile(srcfp, dstfp); err != nil {
fmt.Println(err)
}
}
}
return nil
}