85 lines
2.6 KiB
Go
85 lines
2.6 KiB
Go
// Copyright 2016-2018, Pulumi Corporation.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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// Package archive provides support for creating zip archives of local folders and returning the
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// in-memory buffer. This is how we pass Pulumi program source to the Cloud for hosted scenarios,
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// for execution in a different environment and creating the resources off of the local machine.
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package archive
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import (
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"archive/tar"
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"bytes"
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"compress/gzip"
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"io"
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"os"
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"path/filepath"
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"github.com/pkg/errors"
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"github.com/pulumi/pulumi/pkg/util/contract"
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)
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// Untgz uncompresses a .tar.gz/.tgz file into a specific directory.
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func Untgz(tarball []byte, dir string) error {
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tarReader := bytes.NewReader(tarball)
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gzr, err := gzip.NewReader(tarReader)
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if err != nil {
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return errors.Wrapf(err, "unzipping")
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}
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r := tar.NewReader(gzr)
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for {
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header, err := r.Next()
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if err == io.EOF {
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break
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} else if err != nil {
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return errors.Wrapf(err, "untarring")
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}
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path := filepath.Join(dir, header.Name)
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switch header.Typeflag {
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case tar.TypeDir:
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// Create any directories as needed.
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if _, err := os.Stat(path); err != nil {
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if err = os.MkdirAll(path, 0700); err != nil {
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return errors.Wrapf(err, "untarring dir %s", path)
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}
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}
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case tar.TypeReg:
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// Create any directories as needed. Some tools (notably `npm pack`) don't list
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// directories individually, so if a file is in a directory that doesn't exist, we need
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// to create it here.
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dir := filepath.Dir(path)
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if _, err := os.Stat(dir); err != nil {
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if err = os.MkdirAll(dir, 0700); err != nil {
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return errors.Wrapf(err, "untarring dir %s", dir)
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}
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}
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// Expand files into the target directory.
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dst, err := os.OpenFile(path, os.O_CREATE|os.O_RDWR, os.FileMode(header.Mode))
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if err != nil {
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return errors.Wrapf(err, "opening file %s for untar", path)
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}
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defer contract.IgnoreClose(dst)
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if _, err = io.Copy(dst, r); err != nil {
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return errors.Wrapf(err, "untarring file %s", path)
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}
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default:
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return errors.Errorf("unexpected plugin file type %s (%v)", header.Name, header.Typeflag)
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}
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}
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return nil
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}
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