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mirror of https://github.com/golang/go synced 2024-11-12 02:00:23 -07:00

goinstall: an experiment in (external) package installation

R=adg, r
CC=cw, golang-dev
https://golang.org/cl/224043
This commit is contained in:
Russ Cox 2010-03-04 17:04:50 -08:00
parent e6cd011e68
commit 3e4e4ec704
11 changed files with 745 additions and 3 deletions

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@ -4,5 +4,8 @@ runtime: python
api_version: 1
handlers:
- url: /package.*
script: package.py
- url: /.*
script: gobuild.py

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@ -0,0 +1,132 @@
# Copyright 2010 The Go Authors. All rights reserved.
# Use of this source code is governed by a BSD-style
# license that can be found in the LICENSE file.
# This is the server part of the package dashboard.
# It must be run by App Engine.
from google.appengine.api import memcache
from google.appengine.runtime import DeadlineExceededError
from google.appengine.ext import db
from google.appengine.ext import webapp
from google.appengine.ext.webapp import template
from google.appengine.ext.webapp.util import run_wsgi_app
import binascii
import datetime
import hashlib
import hmac
import logging
import os
import re
import struct
import time
import urllib2
# Storage model for package info recorded on server.
# Just path, count, and time of last install.
class Package(db.Model):
path = db.StringProperty()
web_url = db.StringProperty() # derived from path
count = db.IntegerProperty()
last_install = db.DateTimeProperty()
re_bitbucket = re.compile(r'^bitbucket\.org/[a-z0-9A-Z_.\-]+/[a-z0-9A-Z_.\-]+$')
re_googlecode = re.compile(r'^[a-z0-9\-]+\.googlecode\.com/(svn|hg)$')
re_github = re.compile(r'^github\.com/[a-z0-9A-Z_.\-]+/[a-z0-9A-Z_.\-]+$')
MaxPathLength = 100
class PackagePage(webapp.RequestHandler):
def get(self):
if self.request.get('fmt') == 'json':
return self.json()
q = Package.all()
q.order('-last_install')
by_time = q.fetch(100)
q = Package.all()
q.order('-count')
by_count = q.fetch(100)
self.response.headers['Content-Type'] = 'text/html; charset=utf-8'
path = os.path.join(os.path.dirname(__file__), 'package.html')
self.response.out.write(template.render(path, {"by_time": by_time, "by_count": by_count}))
def json(self):
self.response.set_status(200)
self.response.headers['Content-Type'] = 'text/plain; charset=utf-8'
q = Package.all()
s = '{"packages": ['
sep = ''
for r in q.fetch(1000):
s += '%s\n\t{"path": "%s", "last_install": "%s", "count": "%s"}' % (sep, r.path, r.last_install, r.count)
sep = ','
s += '\n]}\n'
self.response.out.write(s)
def can_get_url(self, url):
try:
req = urllib2.Request(url)
response = urllib2.urlopen(req)
return True
except:
return False
def is_valid_package_path(self, path):
return (re_bitbucket.match(path) or
re_googlecode.match(path) or
re_github.match(path))
def record_pkg(self, path):
# sanity check string
if not path or len(path) > MaxPathLength or not self.is_valid_package_path(path):
return False
# look in datastore
key = 'pkg-' + path
p = Package.get_by_key_name(key)
if p is None:
# not in datastore - verify URL before creating
if re_bitbucket.match(path):
check_url = 'http://' + path + '/?cmd=heads'
web = 'http://' + path + '/'
elif re_github.match(path):
# github doesn't let you fetch the .git directory anymore.
# fetch .git/info/refs instead, like git clone would.
check_url = 'http://'+path+'.git/info/refs'
web = 'http://' + path
elif re_googlecode.match(path):
check_url = 'http://'+path
web = 'http://code.google.com/p/' + path[:path.index('.')]
else:
logging.error('unrecognized path: %s', path)
return False
if not self.can_get_url(check_url):
logging.error('cannot get %s', check_url)
return False
p = Package(key_name = key, path = path, count = 0, web_url = web)
# update package object
p.count += 1
p.last_install = datetime.datetime.utcnow()
p.put()
return True
def post(self):
path = self.request.get('path')
ok = self.record_pkg(path)
if ok:
self.response.set_status(200)
self.response.out.write('ok')
else:
logging.error('invalid path in post: %s', path)
self.response.set_status(500)
self.response.out.write('not ok')
def main():
app = webapp.WSGIApplication([('/package', PackagePage)], debug=True)
run_wsgi_app(app)
if __name__ == '__main__':
main()

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@ -5,7 +5,7 @@
GOBIN="${GOBIN:-$HOME/bin}"
for i in cc 6l 6a 6c 8l 8a 8c 8g 5l 5a 5c 5g gc 6g gopack nm cgo cov ebnflint godefs godoc gofmt gotest goyacc hgpatch prof
for i in cc 6l 6a 6c 8l 8a 8c 8g 5l 5a 5c 5g gc 6g gopack nm cgo cov ebnflint godefs godoc gofmt goinstall gotest goyacc hgpatch prof
do
cd $i
"$GOBIN"/gomake clean

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@ -0,0 +1,14 @@
# Copyright 2009 The Go Authors. All rights reserved.
# Use of this source code is governed by a BSD-style
# license that can be found in the LICENSE file.
include ../../Make.$(GOARCH)
TARG=goinstall
GOFILES=\
download.go\
main.go\
make.go\
parse.go\
include ../../Make.cmd

75
src/cmd/goinstall/doc.go Normal file
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@ -0,0 +1,75 @@
// Copyright 2010 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
/*
Goinstall is an experiment in automatic package installation.
It installs packages, possibly downloading them from the internet.
It maintains a list of public Go packages at http://godashboard.appspot.com/packages.
Usage:
goinstall [flags] importpath...
Flags and default settings:
-dashboard=true tally public packages on godashboard.appspot.com
-update=false update already-downloaded packages
-v=false verbose operation
Goinstall installs each of the packages identified on the command line.
It installs a package's prerequisites before trying to install the package itself.
The source code for a package with import path foo/bar is expected
to be in the directory $GOROOT/src/pkg/foo/bar/. If the import
path refers to a code hosting site, goinstall will download the code
if necessary. The recognized code hosting sites are:
BitBucket (Mercurial)
import "bitbucket.org/user/project"
import "bitbucket.org/user/project/sub/directory"
GitHub (Git)
import "github.com/user/project.git"
import "github.com/user/project.git/sub/directory"
Google Code Project Hosting (Mercurial, Subversion)
import "project.googlecode.com/hg"
import "project.googlecode.com/hg/sub/directory"
import "project.googlecode.com/svn/trunk"
import "project.googlecode.com/svn/trunk/sub/directory"
If the destination directory (e.g., $GOROOT/src/pkg/bitbucket.org/user/project)
already exists and contains an appropriate checkout, goinstall will not
attempt to fetch updates. The -update flag changes this behavior,
causing goinstall to update all remote packages encountered during
the installation.
When downloading or updating, goinstall first looks for a tag or branch
named "release". If there is one, it uses that version of the code.
Otherwise it uses the default version selected by the version control
system, typically HEAD for git, tip for Mercurial.
After a successful download and installation of a publicly accessible
remote package, goinstall reports the installation to godashboard.appspot.com,
which increments a count associated with the package and the time
of its most recent installation. This mechanism powers the package list
at http://godashboard.appspot.com/packages, allowing Go programmers
to learn about popular packages that might be worth looking at.
The -dashboard=false flag disables this reporting.
By default, goinstall prints output only when it encounters an error.
The -v flag causes goinstall to print information about packages
being considered and installed.
Goinstall does not attempt to be a replacement for make.
Instead, it invokes "make install" after locating the package sources.
For local packages without a Makefile and all remote packages,
goinstall creates and uses a temporary Makefile constructed from
the import path and the list of Go files in the package.
*/
package documentation

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@ -0,0 +1,163 @@
// Copyright 2010 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
// Download remote packages.
package main
import (
"http"
"os"
"regexp"
"strings"
)
const dashboardURL = "http://godashboard.appspot.com/package"
// maybeReportToDashboard reports path to dashboard unless
// -dashboard=false is on command line. It ignores errors.
func maybeReportToDashboard(path string) {
// if -dashboard=false was on command line, do nothing
if !*reportToDashboard {
return
}
// otherwise lob url to dashboard
r, _ := http.Post(dashboardURL, "application/x-www-form-urlencoded", strings.NewReader("path="+path))
if r != nil && r.Body != nil {
r.Body.Close()
}
}
var googlecode = regexp.MustCompile(`^([a-z0-9\-]+\.googlecode\.com/(svn|hg))(/[a-z0-9A-Z_.\-/]*)?$`)
var github = regexp.MustCompile(`^(github\.com/[a-z0-9A-Z_.\-]+/[a-z0-9A-Z_.\-]+)(/[a-z0-9A-Z_.\-/]*)?$`)
var bitbucket = regexp.MustCompile(`^(bitbucket\.org/[a-z0-9A-Z_.\-]+/[a-z0-9A-Z_.\-]+)(/[a-z0-9A-Z_.\-/]*)?$`)
// download checks out or updates pkg from the remote server.
func download(pkg string) (string, os.Error) {
if strings.Index(pkg, "..") >= 0 {
return "", os.ErrorString("invalid path (contains ..)")
}
if m := bitbucket.MatchStrings(pkg); m != nil {
if err := vcsCheckout(&hg, root+m[1], "http://"+m[1], m[1]); err != nil {
return "", err
}
return root + pkg, nil
}
if m := googlecode.MatchStrings(pkg); m != nil {
var v *vcs
switch m[2] {
case "hg":
v = &hg
case "svn":
v = &svn
default:
// regexp only allows hg, svn to get through
panic("missing case in download: ", pkg)
}
if err := vcsCheckout(v, root+m[1], "http://"+m[1], m[1]); err != nil {
return "", err
}
return root + pkg, nil
}
if m := github.MatchStrings(pkg); m != nil {
if strings.HasSuffix(m[1], ".git") {
return "", os.ErrorString("repository " + pkg + " should not have .git suffix")
}
if err := vcsCheckout(&git, root+m[1], "http://"+m[1]+".git", m[1]); err != nil {
return "", err
}
return root + pkg, nil
}
return "", os.ErrorString("unknown repository: " + pkg)
}
// a vcs represents a version control system
// like Mercurial, Git, or Subversion.
type vcs struct {
cmd string
metadir string
clone string
update string
pull string
log string
logLimitFlag string
logReleaseFlag string
}
var hg = vcs{
cmd: "hg",
metadir: ".hg",
clone: "clone",
update: "update",
pull: "pull",
log: "log",
logLimitFlag: "-l1",
logReleaseFlag: "-rrelease",
}
var git = vcs{
cmd: "git",
metadir: ".git",
clone: "clone",
update: "checkout",
pull: "fetch",
log: "log",
logLimitFlag: "-n1",
logReleaseFlag: "release",
}
var svn = vcs{
cmd: "svn",
metadir: ".svn",
clone: "checkout",
update: "update",
pull: "",
log: "log",
logLimitFlag: "-l1",
logReleaseFlag: "release",
}
// vcsCheckout checks out repo into dst using vcs.
// It tries to check out (or update, if the dst already
// exists and -u was specified on the command line)
// the repository at tag/branch "release". If there is no
// such tag or branch, it falls back to the repository tip.
func vcsCheckout(vcs *vcs, dst, repo, dashpath string) os.Error {
dir, err := os.Stat(dst + "/" + vcs.metadir)
if err == nil && !dir.IsDirectory() {
return os.ErrorString("not a directory: " + dst)
}
if err != nil {
if err := os.MkdirAll(dst, 0777); err != nil {
return err
}
if err := run("/", nil, vcs.cmd, vcs.clone, repo, dst); err != nil {
return err
}
quietRun(dst, nil, vcs.cmd, vcs.update, "release")
// success on first installation - report
maybeReportToDashboard(dashpath)
} else if *update {
if vcs.pull != "" {
if err := run(dst, nil, vcs.cmd, vcs.pull); err != nil {
return err
}
}
// check for release with hg log -l 1 -r release
// if success, hg update release
// else hg update
if err := quietRun(dst, nil, vcs.cmd, vcs.log, vcs.logLimitFlag, vcs.logReleaseFlag); err == nil {
if err := run(dst, nil, vcs.cmd, vcs.update, "release"); err != nil {
return err
}
} else {
if err := run(dst, nil, vcs.cmd, vcs.update); err != nil {
return err
}
}
}
return nil
}

213
src/cmd/goinstall/main.go Normal file
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@ -0,0 +1,213 @@
// Copyright 2010 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
// Experimental Go package installer; see doc.go.
package main
import (
"bytes"
"exec"
"flag"
"fmt"
"io"
"os"
"path"
"strings"
)
func usage() {
fmt.Fprint(os.Stderr, "usage: goinstall importpath...\n")
flag.PrintDefaults()
os.Exit(2)
}
var (
argv0 = os.Args[0]
errors = false
gobin = os.Getenv("GOBIN")
parents = make(map[string]string)
root = os.Getenv("GOROOT")
visit = make(map[string]status)
reportToDashboard = flag.Bool("dashboard", true, "report public packages at "+dashboardURL)
update = flag.Bool("u", false, "update already-downloaded packages")
verbose = flag.Bool("v", false, "verbose")
)
type status int // status for visited map
const (
unvisited status = iota
visiting
done
)
func main() {
flag.Usage = usage
flag.Parse()
if root == "" {
fmt.Fprintf(os.Stderr, "%s: no $GOROOT\n", argv0)
os.Exit(1)
}
root += "/src/pkg/"
if gobin == "" {
gobin = os.Getenv("HOME") + "/bin"
}
// special case - "unsafe" is already installed
visit["unsafe"] = done
// install command line arguments
args := flag.Args()
if len(args) == 0 {
usage()
}
for _, path := range args {
install(path, "")
}
if errors {
os.Exit(1)
}
}
// printDeps prints the dependency path that leads to pkg.
func printDeps(pkg string) {
if pkg == "" {
return
}
if visit[pkg] != done {
printDeps(parents[pkg])
}
fmt.Fprintf(os.Stderr, "\t%s ->\n", pkg)
}
// install installs the package named by path, which is needed by parent.
func install(pkg, parent string) {
// Make sure we're not already trying to install pkg.
switch v, _ := visit[pkg]; v {
case done:
return
case visiting:
fmt.Fprintf(os.Stderr, "%s: package dependency cycle\n", argv0)
printDeps(parent)
fmt.Fprintf(os.Stderr, "\t%s\n", pkg)
os.Exit(2)
}
visit[pkg] = visiting
parents[pkg] = parent
if *verbose {
fmt.Println(pkg)
}
// Check whether package is local or remote.
// If remote, download or update it.
var dir string
local := false
if isLocalPath(pkg) {
dir = pkg
local = true
} else if isStandardPath(pkg) {
dir = path.Join(root, pkg)
local = true
} else {
var err os.Error
dir, err = download(pkg)
if err != nil {
fmt.Fprintf(os.Stderr, "%s: %s: %s\n", argv0, pkg, err)
errors = true
visit[pkg] = done
return
}
}
// Install prerequisites.
files, m, err := goFiles(dir)
if err != nil {
fmt.Fprintf(os.Stderr, "%s: %s: %s\n", argv0, pkg, err)
errors = true
visit[pkg] = done
return
}
if len(files) == 0 {
fmt.Fprintf(os.Stderr, "%s: %s: package has no files\n", argv0, pkg)
errors = true
visit[pkg] = done
return
}
for p := range m {
install(p, pkg)
}
// Install this package.
if !errors {
if err := domake(dir, pkg, local); err != nil {
fmt.Fprintf(os.Stderr, "%s: installing %s: %s\n", argv0, pkg, err)
errors = true
}
}
visit[pkg] = done
}
// Is this a local path? /foo ./foo ../foo . ..
func isLocalPath(s string) bool {
return strings.HasPrefix(s, "/") || strings.HasPrefix(s, "./") || strings.HasPrefix(s, "../") || s == "." || s == ".."
}
// Is this a standard package path? strings container/vector etc.
// Assume that if the first element has a dot, it's a domain name
// and is not the standard package path.
func isStandardPath(s string) bool {
dot := strings.Index(s, ".")
slash := strings.Index(s, "/")
return dot < 0 || 0 < slash && slash < dot
}
// run runs the command cmd in directory dir with standard input stdin.
// If the command fails, run prints the command and output on standard error
// in addition to returning a non-nil os.Error.
func run(dir string, stdin []byte, cmd ...string) os.Error {
return genRun(dir, stdin, cmd, false)
}
// quietRun is like run but prints nothing on failure unless -v is used.
func quietRun(dir string, stdin []byte, cmd ...string) os.Error {
return genRun(dir, stdin, cmd, true)
}
// genRun implements run and tryRun.
func genRun(dir string, stdin []byte, cmd []string, quiet bool) os.Error {
bin, err := exec.LookPath(cmd[0])
if err != nil {
return err
}
p, err := exec.Run(bin, cmd, os.Environ(), dir, exec.Pipe, exec.Pipe, exec.MergeWithStdout)
if *verbose {
fmt.Fprintf(os.Stderr, "%s: %s; %s %s\n", argv0, dir, bin, strings.Join(cmd[1:], " "))
}
if err != nil {
return err
}
go func() {
p.Stdin.Write(stdin)
p.Stdin.Close()
}()
var buf bytes.Buffer
io.Copy(&buf, p.Stdout)
io.Copy(&buf, p.Stdout)
w, err := p.Wait(0)
p.Close()
if !w.Exited() || w.ExitStatus() != 0 {
if !quiet || *verbose {
if dir != "" {
dir = "cd " + dir + "; "
}
fmt.Fprintf(os.Stderr, "%s: === %s%s\n", argv0, dir, strings.Join(cmd, " "))
os.Stderr.Write(buf.Bytes())
fmt.Fprintf(os.Stderr, "--- %s\n", w)
}
return os.ErrorString("running " + cmd[0] + ": " + w.String())
}
return nil
}

67
src/cmd/goinstall/make.go Normal file
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@ -0,0 +1,67 @@
// Copyright 2010 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
// Run "make install" to build package.
package main
import (
"bytes"
"os"
"template"
)
// domake builds the package in dir.
// If local is false, the package was copied from an external system.
// For non-local packages or packages without Makefiles,
// domake generates a standard Makefile and passes it
// to make on standard input.
func domake(dir, pkg string, local bool) os.Error {
if local {
_, err := os.Stat(dir + "/Makefile")
if err == nil {
return run(dir, nil, gobin+"/gomake", "install")
}
}
makefile, err := makeMakefile(dir, pkg)
if err != nil {
return err
}
return run(dir, makefile, gobin+"/gomake", "-f-", "install")
}
// makeMakefile computes the standard Makefile for the directory dir
// installing as package pkg. It includes all *.go files in the directory
// except those in package main and those ending in _test.go.
func makeMakefile(dir, pkg string) ([]byte, os.Error) {
files, _, err := goFiles(dir)
if err != nil {
return nil, err
}
var buf bytes.Buffer
if err := makefileTemplate.Execute(&makedata{pkg, files}, &buf); err != nil {
return nil, err
}
return buf.Bytes(), nil
}
// makedata is the data type for the makefileTemplate.
type makedata struct {
pkg string // package import path
files []string // list of .go files
}
var makefileTemplate = template.MustParse(`
include $(GOROOT)/src/Make.$(GOARCH)
TARG={pkg}
GOFILES=\
{.repeated section files}
{@}\
{.end}
include $(GOROOT)/src/Make.pkg
`,
nil)

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@ -0,0 +1,72 @@
// Copyright 2010 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
// Wrappers for Go parser.
package main
import (
"path"
"os"
"log"
"strings"
"strconv"
"go/ast"
"go/parser"
)
// goFiles returns a list of the *.go source files in dir,
// excluding those in package main or ending in _test.go.
// It also returns a map giving the packages imported
// by those files. The map keys are the imported paths.
// The key's value is one file that imports that path.
func goFiles(dir string) (files []string, imports map[string]string, err os.Error) {
f, err := os.Open(dir, os.O_RDONLY, 0)
if err != nil {
return nil, nil, err
}
dirs, err := f.Readdir(-1)
f.Close()
if err != nil {
return nil, nil, err
}
files = make([]string, 0, len(dirs))
imports = make(map[string]string)
pkgName := ""
for i := range dirs {
d := &dirs[i]
if !strings.HasSuffix(d.Name, ".go") || strings.HasSuffix(d.Name, "_test.go") {
continue
}
filename := path.Join(dir, d.Name)
pf, err := parser.ParseFile(filename, nil, nil, parser.ImportsOnly)
if err != nil {
return nil, nil, err
}
s := string(pf.Name.Name())
if s == "main" {
continue
}
if pkgName == "" {
pkgName = s
} else if pkgName != s {
return nil, nil, os.ErrorString("multiple package names in " + dir)
}
n := len(files)
files = files[0 : n+1]
files[n] = filename
for _, decl := range pf.Decls {
for _, spec := range decl.(*ast.GenDecl).Specs {
quoted := string(spec.(*ast.ImportSpec).Path.Value)
unquoted, err := strconv.Unquote(quoted)
if err != nil {
log.Crashf("%s: parser returned invalid quoted string: <%s>", filename, quoted)
}
imports[unquoted] = filename
}
}
}
return files, imports, nil
}

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@ -20,7 +20,10 @@ bash mkenam
"$GOBIN"/gomake enam.o
cd ..
for i in cc ${O}l ${O}a ${O}c gc ${O}g gopack nm cov godefs prof gotest
# Note: commands written in Go are not listed here.
# They are in ../make.bash so that they can be built
# after the Go libraries on which they depend.
for i in cc ${O}l ${O}a ${O}c gc ${O}g cov godefs gopack gotest nm prof
do
echo; echo; echo %%%% making $i %%%%; echo
cd $i

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@ -81,7 +81,7 @@ fi
)
bash "$GOROOT"/src/clean.bash
for i in lib9 libbio libmach cmd pkg libcgo cmd/cgo cmd/ebnflint cmd/godoc cmd/gofmt cmd/goyacc cmd/hgpatch
for i in lib9 libbio libmach cmd pkg libcgo cmd/cgo cmd/ebnflint cmd/godoc cmd/gofmt cmd/goinstall cmd/goyacc cmd/hgpatch
do
case "$i-$GOOS-$GOARCH" in
libcgo-nacl-* | cmd/*-nacl-* | libcgo-linux-arm)