func buildCabinet(repo *graph.Repository, id string) error {
// Build the cabinet data
head, err := repo.Head()
if err != nil {
return fmt.Errorf("build: get repo head: %s", err)
}
data := &CabFile{
Repo: repo.String(),
Created: time.Now(),
Head: head,
}
deps, err := Deps.RepoDeps(repo)
if err != nil {
return fmt.Errorf("build: scan dependencies: %s", err)
}
for _, dep := range deps {
rv, err := NewRepoVersion(dep)
if err != nil {
return fmt.Errorf("build: %s", err)
}
data.Deps = append(data.Deps, rv)
}
if *cabTest {
// Test the packages in the repository
test := exec.Command("go", "test", repo.String())
test.Dir = os.TempDir()
test.Stdout = os.Stdout
test.Stderr = os.Stderr
if err := test.Run(); err != nil {
return fmt.Errorf("build: `go test` failed: %s", err)
}
}
// Make the $REPO/.rx directory
repoRx := filepath.Join(repo.Root, ".rx")
if err := os.MkdirAll(repoRx, 0755); err != nil {
return fmt.Errorf("build: create .rx: %s", err)
}
filename := filepath.Join(repoRx, "cabinet-"+id)
// Open the file, but fail if it already exists
file, err := os.OpenFile(filename, os.O_WRONLY|os.O_CREATE|os.O_EXCL, 0644)
if err != nil {
return fmt.Errorf("build: open cabinet: %s", err)
}
defer file.Close()
if err := gob.NewEncoder(file).Encode(data); err != nil {
return fmt.Errorf("build: encoding cabinet: %s", err)
}
log.Printf("Cabinet written to %q", filename)
return nil
}
// Apply attempts to locate the repository and pin it to the head version.
func (dep *RepoVersion) Apply() error {
// Find the repository
var repo *graph.Repository
for _, pkg := range dep.Packages {
// Make sure the package is installed and up-to-date
get := exec.Command("go", "get", "-d", pkg)
get.Dir = os.TempDir()
get.Stdout = os.Stdout
get.Stderr = os.Stderr
if err := get.Run(); err != nil {
continue
}
// Scan for new packages
if err := Deps.Scan(dep.Pattern); err != nil {
continue
}
// See if we found the package we wanted
p, ok := Deps.Package[pkg]
if !ok {
continue
}
// Get the repository
r, ok := Deps.Repository[p.RepoRoot]
if !ok {
continue
}
repo = r
break
}
if repo == nil {
return fmt.Errorf("apply(%q@%q): unable to locate repository", dep.Pattern, dep.Head)
}
// Get fallback in case the update fails
fallback, err := repo.Head()
if err != nil {
return fmt.Errorf("apply(%q@%q): unable to determine fallback version", dep.Pattern, dep.Head)
}
// Pin the version
if err := repo.ToRev(dep.Head); err != nil {
if ferr := repo.ToRev(fallback); ferr != nil {
return fmt.Errorf("apply(%q): pin(%q) [%s] and fallback(%q) [%s] failed",
dep.Pattern, dep.Head, err, fallback, ferr)
}
return fmt.Errorf("apply(%q@%q): pin failed: %s", dep.Pattern, dep.Head, err)
}
log.Printf("Pinned %s @ %s", dep.Pattern, dep.Head)
return nil
}
// NewRepoVersion creates a repo version object suitable for storing into cabinets, etc.
func NewRepoVersion(repo *graph.Repository) (*RepoVersion, error) {
head, err := repo.Head()
if err != nil {
return nil, fmt.Errorf("get %s head: %s", repo, err)
}
return &RepoVersion{
Pattern: repo.String(),
Packages: repo.Packages,
Head: head,
}, nil
}