mirror of
https://github.com/TECHNOFAB11/jsonnet-bundler.git
synced 2025-12-12 16:10:04 +01:00
106 lines
2.5 KiB
Go
106 lines
2.5 KiB
Go
// Copyright 2018 jsonnet-bundler authors
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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 pkg
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import (
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"context"
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"crypto/sha256"
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"encoding/hex"
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"fmt"
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"github.com/jsonnet-bundler/jsonnet-bundler/spec/v1/deps"
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"github.com/pkg/errors"
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"io"
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"io/ioutil"
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"net/http"
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"os"
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"path"
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"path/filepath"
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"strings"
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)
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type HttpPackage struct {
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Source *deps.Http
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}
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func NewHttpPackage(source *deps.Http) Interface {
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return &HttpPackage{
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Source: source,
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}
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}
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func downloadFile(filepath string, url string) error {
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resp, err := http.Get(url)
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if err != nil {
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return err
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}
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if resp.StatusCode != 200 {
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return fmt.Errorf("unexpected status code %d", resp.StatusCode)
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}
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defer resp.Body.Close()
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// Create the file
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out, err := os.Create(filepath)
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if err != nil {
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return err
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}
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defer out.Close()
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// Write the body to file
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_, err = io.Copy(out, resp.Body)
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if err != nil {
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return err
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}
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return nil
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}
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func (h *HttpPackage) Install(ctx context.Context, name, dir, version string) (string, error) {
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destPath := path.Join(dir, name)
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pkgh := sha256.Sum256([]byte(fmt.Sprintf("jsonnetpkg-%s-%s", strings.Replace(name, "/", "-", -1), strings.Replace(version, "/", "-", -1))))
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// using 16 bytes should be a good middle ground between length and collision resistance
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tmpDir, err := ioutil.TempDir(filepath.Join(dir, ".tmp"), hex.EncodeToString(pkgh[:16]))
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if err != nil {
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return "", errors.Wrap(err, "failed to create tmp dir")
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}
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defer os.RemoveAll(tmpDir)
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err = os.Setenv("VERSION", version)
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if err != nil {
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return "", err
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}
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url := os.ExpandEnv(h.Source.Url)
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filename := filepath.Base(url)
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err = downloadFile(path.Join(tmpDir, filename), url)
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if err != nil {
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return "", errors.Wrap(err, "failed to download file")
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}
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var ar *os.File
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ar, err = os.Open(path.Join(tmpDir, filename))
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if err != nil {
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return "", errors.Wrap(err, "failed to open downloaded archive")
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}
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defer ar.Close()
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err = GzipUntar(destPath, ar, "")
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if err != nil {
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return "", errors.Wrap(err, "failed to unpack downloaded archive")
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}
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return version, nil
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}
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