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/
dir_reader.go
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/
dir_reader.go
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package release
import (
"path/filepath"
bosherr "github.com/cloudfoundry/bosh-utils/errors"
boshlog "github.com/cloudfoundry/bosh-utils/logger"
boshsys "github.com/cloudfoundry/bosh-utils/system"
bprelman "github.com/cppforlife/bosh-provisioner/release/manifest"
)
const dirReaderLogTag = "DirReader"
type DirReader struct {
releaseName string // e.g. room101
releaseVersion string // e.g. 0+dev.16
dir string
fs boshsys.FileSystem
logger boshlog.Logger
}
func NewDirReader(
releaseName string,
releaseVersion string,
dir string,
fs boshsys.FileSystem,
logger boshlog.Logger,
) DirReader {
return DirReader{
releaseName: releaseName,
releaseVersion: releaseVersion,
dir: dir,
fs: fs,
logger: logger,
}
}
func (r DirReader) Read() (Release, error) {
var release Release
// e.g. room101-0+dev.16.yml
manifestFileName := r.releaseName + "-" + r.releaseVersion + ".yml"
// bosh_cli now places release manifests into sub-directories named after a release
oldManifestPath := filepath.Join(r.dir, "dev_releases", manifestFileName)
migratedManifestPath := filepath.Join(r.dir, "dev_releases", r.releaseName, manifestFileName)
manifestPath := r.pathThatExistsOrEmpty(oldManifestPath, migratedManifestPath)
if len(manifestPath) == 0 {
return release, bosherr.Errorf(
"Manifest not found at '%s' or '%s'",
oldManifestPath,
migratedManifestPath,
)
}
manifest, err := bprelman.NewManifestFromPath(manifestPath, r.fs)
if err != nil {
closeErr := r.Close()
if closeErr != nil {
r.logger.Debug(dirReaderLogTag, "Failed to close release %v", closeErr)
}
return release, bosherr.WrapError(err, "Building manifest")
}
r.logger.Debug(dirReaderLogTag, "Done building manifest %#v", manifest)
release.populateFromManifest(manifest)
r.populateReleaseTarPaths(&release)
return release, nil
}
func (r DirReader) Close() error {
// Caller owns release directory; hence, nothing to clean up
return nil
}
// populateReleaseTarPaths sets TarPath for each job/package in the release.
func (r DirReader) populateReleaseTarPaths(release *Release) {
devBuilds := filepath.Join(r.dir, ".dev_builds")
finalBuilds := filepath.Join(r.dir, ".final_builds")
for i, job := range release.Jobs {
fileName := job.Fingerprint + ".tgz"
devPath := filepath.Join(devBuilds, "jobs", job.Name, fileName)
finalPath := filepath.Join(finalBuilds, "jobs", job.Name, fileName)
release.Jobs[i].TarPath = r.pathThatExistsOrEmpty(devPath, finalPath)
}
for _, pkg := range release.Packages {
fileName := pkg.Fingerprint + ".tgz"
devPath := filepath.Join(devBuilds, "packages", pkg.Name, fileName)
finalPath := filepath.Join(finalBuilds, "packages", pkg.Name, fileName)
pkg.TarPath = r.pathThatExistsOrEmpty(devPath, finalPath)
}
}
// pathThatExists returns first path that exists on the file system.
func (r DirReader) pathThatExistsOrEmpty(firstPath, secondPath string) string {
switch {
case r.fs.FileExists(firstPath):
return firstPath
case r.fs.FileExists(secondPath):
return secondPath
default:
return ""
}
}
/*
Example of BOSH release director with created dev releases:
$ tree ~/Downloads/room101-release
~/Downloads/room101-release
├── .dev_builds/
│ ├── jobs
│ │ ├── warden
│ │ │ ├── 2a2b0559a97f869274602ffed008827cd66d15c3.tgz
│ │ │ └── index.yml
│ │ └── winston
│ │ ├── 98facd269cd8096a9b0ad354cbb5f0fc4265006f.tgz
│ │ └── index.yml
│ └── packages
│ ├── aufs
│ │ ├── cc5b6bf395c60d2aba6e0bc1ceeb613e7aadb52b.tgz
│ │ └── index.yml
│ ├── golang_1.2
│ │ ├── ac825cab297fba938bec25c83f4a5780f88cdc92.tgz
│ │ └── index.yml
│ ├── iptables
│ │ ├── 7226d311e90f49b05287e79f339581a1de9ea82e.tgz
│ │ └── index.yml
│ ├── pid_utils
│ │ ├── de523512921338bac845ea7230e30b4307f842e7.tgz
│ │ └── index.yml
│ ├── warden-linux
│ │ ├── 3f90138dae6c92c3e4595742ab6a513560e32a4c.tgz
│ │ └── index.yml
│ └── winston
│ ├── 69fcbe3ef485a7f9d7c8efa6f18a74a0cffcb213.tgz
│ └── index.yml
└── dev_releases
├── index.yml
├── room101-0+dev.1.yml
└── room101-0+dev.2.yml
*/