forked from Debian/ratt
/
ratt.go
205 lines (180 loc) · 5.34 KB
/
ratt.go
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// ratt operates on a Debian .changes file of a just-built package, identifies
// all reverse-build-dependencies and rebuilds them with the .debs from the
// .changes file.
//
// The intended use-case is, for example, to package a new snapshot of a Go
// library and verify that the new version does not break any other Go
// libraries/binaries.
package main
import (
"bufio"
"flag"
"fmt"
"log"
"os"
"os/exec"
"path/filepath"
"regexp"
"sort"
"strings"
"pault.ag/go/debian/control"
"pault.ag/go/debian/version"
)
var (
logDir = flag.String("log_dir",
"buildlogs",
"Directory in which sbuild(1) logs for all reverse-build-dependencies are stored")
dryRun = flag.Bool("dry_run",
false,
"Print sbuild command lines, but do not actually build the reverse-build-dependencies")
listsPrefixRe = regexp.MustCompile(`/([^/]*_dists_.*)_InRelease$`)
)
func dependsOn(src control.SourceIndex, binaries map[string]bool) bool {
buildDepends := src.GetBuildDepends()
for _, possibility := range buildDepends.GetAllPossibilities() {
if binaries[possibility.Name] {
return true
}
}
return false
}
func addReverseBuildDeps(sourcesPath string, binaries map[string]bool, rebuild map[string][]version.Version) error {
log.Printf("Loading sources index %q\n", sourcesPath)
s, err := os.Open(sourcesPath)
if err != nil {
return err
}
defer s.Close()
idx, err := control.ParseSourceIndex(bufio.NewReader(s))
if err != nil {
return err
}
for _, src := range idx {
if dependsOn(src, binaries) {
rebuild[src.Package] = append(rebuild[src.Package], src.Version)
}
}
return nil
}
func main() {
flag.Parse()
if flag.NArg() != 1 {
log.Fatalf("Usage: %s [options] <path-to-changes-file>\n", os.Args[0])
}
changesPath := flag.Arg(0)
log.Printf("Loading changes file %q\n", changesPath)
c, err := os.Open(changesPath)
if err != nil {
log.Fatal(err)
}
defer c.Close()
changes, err := control.ParseChanges(bufio.NewReader(c), changesPath)
if err != nil {
log.Fatal(err)
}
binaries := make(map[string]bool)
var debs []string
for _, file := range changes.Files {
if filepath.Ext(file.Filename) == ".deb" {
debs = append(debs, file.Filename)
}
}
for _, binary := range changes.Binaries {
binaries[binary] = true
}
log.Printf(" - %d binary packages: %s\n", len(changes.Binaries), strings.Join(changes.Binaries, " "))
log.Printf(" - corresponding .debs (will be injected when building):\n")
for _, deb := range debs {
log.Printf(" %s\n", deb)
}
var sourcesPaths []string
releaseMatches, err := filepath.Glob("/var/lib/apt/lists/*_InRelease")
if err != nil {
log.Fatal(err)
}
for _, releasepath := range releaseMatches {
r, err := os.Open(releasepath)
if err != nil {
log.Fatal(err)
}
defer r.Close()
release, err := control.ParseParagraph(bufio.NewReader(r))
if err != nil {
log.Fatal(err)
}
if release.Values["Suite"] != "unstable" {
continue
}
listsPrefix := listsPrefixRe.FindStringSubmatch(releasepath)
if len(listsPrefix) != 2 {
log.Fatalf("release file path %q does not match regexp %q\n", releasepath, listsPrefixRe)
}
sourceMatches, err := filepath.Glob(fmt.Sprintf("/var/lib/apt/lists/%s_*_Sources", listsPrefix[1]))
if err != nil {
log.Fatal(err)
}
sourcesPaths = append(sourcesPaths, sourceMatches...)
}
if len(sourcesPaths) == 0 {
log.Fatal("Could not find InRelease file for unstable. Are you missing unstable in your /etc/apt/sources.list?")
}
rebuild := make(map[string][]version.Version)
for _, sourcesPath := range sourcesPaths {
if err := addReverseBuildDeps(sourcesPath, binaries, rebuild); err != nil {
log.Fatal(err)
}
}
// TODO: add -recursive flag to also cover dependencies which are not DIRECT dependencies. use http://godoc.org/pault.ag/go/debian/control#OrderDSCForBuild (topsort) to build dependencies in the right order (saving CPU time).
// TODO: what’s a good integration method for doing this in more setups, e.g. on a cloud provider or something? mapreri from #debian-qa says jenkins.debian.net is suitable.
buildresults := make(map[string]bool)
for src, versions := range rebuild {
sort.Sort(sort.Reverse(version.Slice(versions)))
newest := versions[0]
target := fmt.Sprintf("%s_%s", src, newest)
// TODO: discard resulting package immediately?
args := []string{
"--arch-all",
"--dist=sid",
"--nolog",
target,
}
for _, filename := range debs {
args = append(args, fmt.Sprintf("--extra-package=%s", filename))
}
cmd := exec.Command("sbuild", args...)
if err := os.MkdirAll(*logDir, 0755); err != nil {
log.Fatal(err)
}
log.Printf("Building %s (commandline: %v)\n", target, cmd.Args)
if *dryRun {
continue
}
buildlog, err := os.Create(filepath.Join(*logDir, target))
if err != nil {
log.Fatal(err)
}
defer buildlog.Close()
cmd.Stdout = buildlog
cmd.Stderr = buildlog
if err := cmd.Run(); err != nil {
log.Printf("building %s failed: %v\n", target, err)
buildresults[target] = false
} else {
buildresults[target] = true
}
}
log.Printf("Build results:\n")
// Print all successful builds first (not as interesting), then failed ones.
for target, result := range buildresults {
if !result {
continue
}
log.Printf("PASSED: %s\n", target)
}
for target, result := range buildresults {
if result {
continue
}
log.Printf("FAILED: %s (see %s)\n", target, filepath.Join(*logDir, target))
}
}