d2b09d854f
Implement a new error handling library based on pkg/errors. It provides stack saving on wrapping and exports some function to add stack saving also to external errors. It also implements custom zerolog error formatting without adding too much verbosity by just printing the chain error file:line without a full stack trace of every error. * Add a --detailed-errors options to print error with they full chain * Wrap all error returns. Use errors.WithStack to wrap without adding a new messsage and error.Wrap[f] to add a message. * Add golangci-lint wrapcheck to check that external packages errors are wrapped. This won't check that internal packages error are wrapped. But we want also to ensure this case so we'll have to find something else to check also these.
129 lines
3.4 KiB
Go
129 lines
3.4 KiB
Go
// Copyright 2019 Sorint.lab
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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 common
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import (
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"io"
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"io/ioutil"
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"net/url"
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"os"
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"path"
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"agola.io/agola/internal/errors"
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"agola.io/agola/internal/etcd"
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"agola.io/agola/internal/objectstorage"
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"agola.io/agola/internal/services/config"
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"github.com/rs/zerolog"
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)
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const (
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StorePrefix = "agola"
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)
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// WriteFileAtomicFunc atomically writes a file, it achieves this by creating a
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// temporary file and then moving it. writeFunc is the func that will write
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// data to the file.
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// This function is taken from
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// https://github.com/youtube/vitess/blob/master/go/ioutil2/ioutil.go
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// Copyright 2012, Google Inc. BSD-license, see licenses/LICENSE-BSD-3-Clause
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func WriteFileAtomicFunc(filename string, perm os.FileMode, writeFunc func(f io.Writer) error) error {
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dir, name := path.Split(filename)
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f, err := ioutil.TempFile(dir, name)
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if err != nil {
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return errors.WithStack(err)
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}
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err = writeFunc(f)
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if err == nil {
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err = f.Sync()
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}
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if closeErr := f.Close(); err == nil {
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err = closeErr
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}
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if permErr := os.Chmod(f.Name(), perm); err == nil {
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err = permErr
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}
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if err == nil {
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err = os.Rename(f.Name(), filename)
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}
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// Any err should result in full cleanup.
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if err != nil {
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os.Remove(f.Name())
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}
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return errors.WithStack(err)
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}
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// WriteFileAtomic atomically writes a file
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func WriteFileAtomic(filename string, data []byte, perm os.FileMode) error {
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return WriteFileAtomicFunc(filename, perm,
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func(f io.Writer) error {
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_, err := f.Write(data)
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return errors.WithStack(err)
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})
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}
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func NewObjectStorage(c *config.ObjectStorage) (*objectstorage.ObjStorage, error) {
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var (
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err error
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ost objectstorage.Storage
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)
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switch c.Type {
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case config.ObjectStorageTypePosix:
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ost, err = objectstorage.NewPosix(c.Path)
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if err != nil {
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return nil, errors.Wrapf(err, "failed to create posix object storage")
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}
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case config.ObjectStorageTypeS3:
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// minio golang client doesn't accept an url as an endpoint
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endpoint := c.Endpoint
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secure := !c.DisableTLS
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if u, err := url.Parse(c.Endpoint); err == nil {
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endpoint = u.Host
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switch u.Scheme {
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case "https":
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secure = true
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case "http":
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secure = false
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default:
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return nil, errors.Errorf("wrong s3 endpoint scheme %q (must be http or https)", u.Scheme)
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}
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}
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ost, err = objectstorage.NewS3(c.Bucket, c.Location, endpoint, c.AccessKey, c.SecretAccessKey, secure)
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if err != nil {
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return nil, errors.Wrapf(err, "failed to create s3 object storage")
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}
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}
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return objectstorage.NewObjStorage(ost, "/"), nil
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}
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func NewEtcd(c *config.Etcd, log zerolog.Logger, prefix string) (*etcd.Store, error) {
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e, err := etcd.New(etcd.Config{
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Log: log,
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Endpoints: c.Endpoints,
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Prefix: prefix,
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CertFile: c.TLSCertFile,
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KeyFile: c.TLSKeyFile,
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CAFile: c.TLSCAFile,
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SkipTLSVerify: c.TLSSkipVerify,
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})
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if err != nil {
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return nil, errors.Wrapf(err, "failed to create etcd store")
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}
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return e, nil
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}
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