Initial commit
This commit is contained in:
Ria Bhatia
663
vendor/github.com/hyperhq/hypercli/builder/dockerfile/internals.go
generated
vendored
Normal file
663
vendor/github.com/hyperhq/hypercli/builder/dockerfile/internals.go
generated
vendored
Normal file
@@ -0,0 +1,663 @@
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package dockerfile
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// internals for handling commands. Covers many areas and a lot of
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// non-contiguous functionality. Please read the comments.
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import (
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"crypto/sha256"
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"encoding/hex"
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"fmt"
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"io"
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"io/ioutil"
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"net/http"
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"net/url"
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"os"
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"path/filepath"
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"runtime"
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"sort"
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"strings"
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"time"
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"github.com/Sirupsen/logrus"
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"github.com/docker/docker/api"
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"github.com/docker/docker/builder"
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"github.com/docker/docker/builder/dockerfile/parser"
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"github.com/docker/docker/pkg/archive"
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"github.com/docker/docker/pkg/httputils"
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"github.com/docker/docker/pkg/ioutils"
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"github.com/docker/docker/pkg/jsonmessage"
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"github.com/docker/docker/pkg/progress"
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"github.com/docker/docker/pkg/streamformatter"
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"github.com/docker/docker/pkg/stringid"
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"github.com/docker/docker/pkg/system"
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"github.com/docker/docker/pkg/tarsum"
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"github.com/docker/docker/pkg/urlutil"
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"github.com/docker/docker/runconfig/opts"
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"github.com/docker/engine-api/types"
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"github.com/docker/engine-api/types/container"
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"github.com/docker/engine-api/types/strslice"
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)
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func (b *Builder) commit(id string, autoCmd *strslice.StrSlice, comment string) error {
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if b.disableCommit {
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return nil
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}
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if b.image == "" && !b.noBaseImage {
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return fmt.Errorf("Please provide a source image with `from` prior to commit")
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}
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b.runConfig.Image = b.image
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if id == "" {
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cmd := b.runConfig.Cmd
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if runtime.GOOS != "windows" {
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b.runConfig.Cmd = strslice.New("/bin/sh", "-c", "#(nop) "+comment)
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} else {
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b.runConfig.Cmd = strslice.New("cmd", "/S /C", "REM (nop) "+comment)
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}
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defer func(cmd *strslice.StrSlice) { b.runConfig.Cmd = cmd }(cmd)
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hit, err := b.probeCache()
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if err != nil {
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return err
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} else if hit {
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return nil
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}
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id, err = b.create()
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if err != nil {
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return err
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}
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}
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// Note: Actually copy the struct
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autoConfig := *b.runConfig
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autoConfig.Cmd = autoCmd
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commitCfg := &types.ContainerCommitConfig{
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Author: b.maintainer,
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Pause: true,
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Config: &autoConfig,
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}
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// Commit the container
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imageID, err := b.docker.Commit(id, commitCfg)
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if err != nil {
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return err
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}
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b.image = imageID
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return nil
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}
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type copyInfo struct {
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builder.FileInfo
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decompress bool
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}
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func (b *Builder) runContextCommand(args []string, allowRemote bool, allowLocalDecompression bool, cmdName string) error {
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if b.context == nil {
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return fmt.Errorf("No context given. Impossible to use %s", cmdName)
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}
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if len(args) < 2 {
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return fmt.Errorf("Invalid %s format - at least two arguments required", cmdName)
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}
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// Work in daemon-specific filepath semantics
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dest := filepath.FromSlash(args[len(args)-1]) // last one is always the dest
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b.runConfig.Image = b.image
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var infos []copyInfo
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// Loop through each src file and calculate the info we need to
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// do the copy (e.g. hash value if cached). Don't actually do
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// the copy until we've looked at all src files
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var err error
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for _, orig := range args[0 : len(args)-1] {
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var fi builder.FileInfo
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decompress := allowLocalDecompression
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if urlutil.IsURL(orig) {
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if !allowRemote {
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return fmt.Errorf("Source can't be a URL for %s", cmdName)
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}
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fi, err = b.download(orig)
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if err != nil {
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return err
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}
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defer os.RemoveAll(filepath.Dir(fi.Path()))
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decompress = false
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infos = append(infos, copyInfo{fi, decompress})
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continue
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}
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// not a URL
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subInfos, err := b.calcCopyInfo(cmdName, orig, allowLocalDecompression, true)
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if err != nil {
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return err
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}
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infos = append(infos, subInfos...)
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}
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if len(infos) == 0 {
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return fmt.Errorf("No source files were specified")
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}
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if len(infos) > 1 && !strings.HasSuffix(dest, string(os.PathSeparator)) {
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return fmt.Errorf("When using %s with more than one source file, the destination must be a directory and end with a /", cmdName)
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}
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// For backwards compat, if there's just one info then use it as the
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// cache look-up string, otherwise hash 'em all into one
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var srcHash string
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var origPaths string
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if len(infos) == 1 {
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fi := infos[0].FileInfo
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origPaths = fi.Name()
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if hfi, ok := fi.(builder.Hashed); ok {
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srcHash = hfi.Hash()
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}
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} else {
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var hashs []string
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var origs []string
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for _, info := range infos {
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fi := info.FileInfo
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origs = append(origs, fi.Name())
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if hfi, ok := fi.(builder.Hashed); ok {
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hashs = append(hashs, hfi.Hash())
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}
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}
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hasher := sha256.New()
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hasher.Write([]byte(strings.Join(hashs, ",")))
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srcHash = "multi:" + hex.EncodeToString(hasher.Sum(nil))
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origPaths = strings.Join(origs, " ")
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}
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cmd := b.runConfig.Cmd
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if runtime.GOOS != "windows" {
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b.runConfig.Cmd = strslice.New("/bin/sh", "-c", fmt.Sprintf("#(nop) %s %s in %s", cmdName, srcHash, dest))
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} else {
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b.runConfig.Cmd = strslice.New("cmd", "/S", "/C", fmt.Sprintf("REM (nop) %s %s in %s", cmdName, srcHash, dest))
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}
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defer func(cmd *strslice.StrSlice) { b.runConfig.Cmd = cmd }(cmd)
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if hit, err := b.probeCache(); err != nil {
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return err
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} else if hit {
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return nil
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}
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container, err := b.docker.ContainerCreate(types.ContainerCreateConfig{Config: b.runConfig})
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if err != nil {
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return err
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}
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b.tmpContainers[container.ID] = struct{}{}
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comment := fmt.Sprintf("%s %s in %s", cmdName, origPaths, dest)
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// Twiddle the destination when its a relative path - meaning, make it
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// relative to the WORKINGDIR
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if !system.IsAbs(dest) {
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hasSlash := strings.HasSuffix(dest, string(os.PathSeparator))
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dest = filepath.Join(string(os.PathSeparator), filepath.FromSlash(b.runConfig.WorkingDir), dest)
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// Make sure we preserve any trailing slash
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if hasSlash {
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dest += string(os.PathSeparator)
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}
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}
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for _, info := range infos {
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if err := b.docker.CopyOnBuild(container.ID, dest, info.FileInfo, info.decompress); err != nil {
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return err
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}
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}
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return b.commit(container.ID, cmd, comment)
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}
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func (b *Builder) download(srcURL string) (fi builder.FileInfo, err error) {
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// get filename from URL
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u, err := url.Parse(srcURL)
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if err != nil {
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return
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}
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path := filepath.FromSlash(u.Path) // Ensure in platform semantics
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if strings.HasSuffix(path, string(os.PathSeparator)) {
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path = path[:len(path)-1]
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}
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parts := strings.Split(path, string(os.PathSeparator))
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filename := parts[len(parts)-1]
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if filename == "" {
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err = fmt.Errorf("cannot determine filename from url: %s", u)
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return
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}
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// Initiate the download
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resp, err := httputils.Download(srcURL)
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if err != nil {
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return
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}
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// Prepare file in a tmp dir
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tmpDir, err := ioutils.TempDir("", "docker-remote")
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if err != nil {
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return
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}
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defer func() {
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if err != nil {
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os.RemoveAll(tmpDir)
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}
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}()
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tmpFileName := filepath.Join(tmpDir, filename)
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tmpFile, err := os.OpenFile(tmpFileName, os.O_RDWR|os.O_CREATE|os.O_EXCL, 0600)
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if err != nil {
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return
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}
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stdoutFormatter := b.Stdout.(*streamformatter.StdoutFormatter)
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progressOutput := stdoutFormatter.StreamFormatter.NewProgressOutput(stdoutFormatter.Writer, true)
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progressReader := progress.NewProgressReader(resp.Body, progressOutput, resp.ContentLength, "", "Downloading")
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// Download and dump result to tmp file
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if _, err = io.Copy(tmpFile, progressReader); err != nil {
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tmpFile.Close()
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return
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}
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fmt.Fprintln(b.Stdout)
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// ignoring error because the file was already opened successfully
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tmpFileSt, err := tmpFile.Stat()
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if err != nil {
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return
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}
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tmpFile.Close()
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// Set the mtime to the Last-Modified header value if present
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// Otherwise just remove atime and mtime
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mTime := time.Time{}
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lastMod := resp.Header.Get("Last-Modified")
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if lastMod != "" {
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// If we can't parse it then just let it default to 'zero'
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// otherwise use the parsed time value
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if parsedMTime, err := http.ParseTime(lastMod); err == nil {
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mTime = parsedMTime
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}
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}
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if err = system.Chtimes(tmpFileName, mTime, mTime); err != nil {
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return
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}
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// Calc the checksum, even if we're using the cache
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r, err := archive.Tar(tmpFileName, archive.Uncompressed)
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if err != nil {
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return
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}
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tarSum, err := tarsum.NewTarSum(r, true, tarsum.Version1)
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if err != nil {
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return
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}
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if _, err = io.Copy(ioutil.Discard, tarSum); err != nil {
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return
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}
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hash := tarSum.Sum(nil)
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r.Close()
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return &builder.HashedFileInfo{FileInfo: builder.PathFileInfo{FileInfo: tmpFileSt, FilePath: tmpFileName}, FileHash: hash}, nil
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}
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func (b *Builder) calcCopyInfo(cmdName, origPath string, allowLocalDecompression, allowWildcards bool) ([]copyInfo, error) {
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// Work in daemon-specific OS filepath semantics
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origPath = filepath.FromSlash(origPath)
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|
||||
if origPath != "" && origPath[0] == os.PathSeparator && len(origPath) > 1 {
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origPath = origPath[1:]
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}
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origPath = strings.TrimPrefix(origPath, "."+string(os.PathSeparator))
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|
||||
// Deal with wildcards
|
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if allowWildcards && containsWildcards(origPath) {
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var copyInfos []copyInfo
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if err := b.context.Walk("", func(path string, info builder.FileInfo, err error) error {
|
||||
if err != nil {
|
||||
return err
|
||||
}
|
||||
if info.Name() == "" {
|
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// Why are we doing this check?
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return nil
|
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}
|
||||
if match, _ := filepath.Match(origPath, path); !match {
|
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return nil
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}
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|
||||
// Note we set allowWildcards to false in case the name has
|
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// a * in it
|
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subInfos, err := b.calcCopyInfo(cmdName, path, allowLocalDecompression, false)
|
||||
if err != nil {
|
||||
return err
|
||||
}
|
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copyInfos = append(copyInfos, subInfos...)
|
||||
return nil
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}); err != nil {
|
||||
return nil, err
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}
|
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return copyInfos, nil
|
||||
}
|
||||
|
||||
// Must be a dir or a file
|
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|
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statPath, fi, err := b.context.Stat(origPath)
|
||||
if err != nil {
|
||||
return nil, err
|
||||
}
|
||||
|
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copyInfos := []copyInfo{{FileInfo: fi, decompress: allowLocalDecompression}}
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|
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hfi, handleHash := fi.(builder.Hashed)
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||||
if !handleHash {
|
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return copyInfos, nil
|
||||
}
|
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|
||||
// Deal with the single file case
|
||||
if !fi.IsDir() {
|
||||
hfi.SetHash("file:" + hfi.Hash())
|
||||
return copyInfos, nil
|
||||
}
|
||||
// Must be a dir
|
||||
var subfiles []string
|
||||
err = b.context.Walk(statPath, func(path string, info builder.FileInfo, err error) error {
|
||||
if err != nil {
|
||||
return err
|
||||
}
|
||||
// we already checked handleHash above
|
||||
subfiles = append(subfiles, info.(builder.Hashed).Hash())
|
||||
return nil
|
||||
})
|
||||
if err != nil {
|
||||
return nil, err
|
||||
}
|
||||
|
||||
sort.Strings(subfiles)
|
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hasher := sha256.New()
|
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hasher.Write([]byte(strings.Join(subfiles, ",")))
|
||||
hfi.SetHash("dir:" + hex.EncodeToString(hasher.Sum(nil)))
|
||||
|
||||
return copyInfos, nil
|
||||
}
|
||||
|
||||
func containsWildcards(name string) bool {
|
||||
for i := 0; i < len(name); i++ {
|
||||
ch := name[i]
|
||||
if ch == '\\' {
|
||||
i++
|
||||
} else if ch == '*' || ch == '?' || ch == '[' {
|
||||
return true
|
||||
}
|
||||
}
|
||||
return false
|
||||
}
|
||||
|
||||
func (b *Builder) processImageFrom(img builder.Image) error {
|
||||
if img != nil {
|
||||
b.image = img.ImageID()
|
||||
|
||||
if img.RunConfig() != nil {
|
||||
b.runConfig = img.RunConfig()
|
||||
}
|
||||
}
|
||||
|
||||
// Check to see if we have a default PATH, note that windows won't
|
||||
// have one as its set by HCS
|
||||
if system.DefaultPathEnv != "" {
|
||||
// Convert the slice of strings that represent the current list
|
||||
// of env vars into a map so we can see if PATH is already set.
|
||||
// If its not set then go ahead and give it our default value
|
||||
configEnv := opts.ConvertKVStringsToMap(b.runConfig.Env)
|
||||
if _, ok := configEnv["PATH"]; !ok {
|
||||
b.runConfig.Env = append(b.runConfig.Env,
|
||||
"PATH="+system.DefaultPathEnv)
|
||||
}
|
||||
}
|
||||
|
||||
if img == nil {
|
||||
// Typically this means they used "FROM scratch"
|
||||
return nil
|
||||
}
|
||||
|
||||
// Process ONBUILD triggers if they exist
|
||||
if nTriggers := len(b.runConfig.OnBuild); nTriggers != 0 {
|
||||
word := "trigger"
|
||||
if nTriggers > 1 {
|
||||
word = "triggers"
|
||||
}
|
||||
fmt.Fprintf(b.Stderr, "# Executing %d build %s...\n", nTriggers, word)
|
||||
}
|
||||
|
||||
// Copy the ONBUILD triggers, and remove them from the config, since the config will be committed.
|
||||
onBuildTriggers := b.runConfig.OnBuild
|
||||
b.runConfig.OnBuild = []string{}
|
||||
|
||||
// parse the ONBUILD triggers by invoking the parser
|
||||
for _, step := range onBuildTriggers {
|
||||
ast, err := parser.Parse(strings.NewReader(step))
|
||||
if err != nil {
|
||||
return err
|
||||
}
|
||||
|
||||
for i, n := range ast.Children {
|
||||
switch strings.ToUpper(n.Value) {
|
||||
case "ONBUILD":
|
||||
return fmt.Errorf("Chaining ONBUILD via `ONBUILD ONBUILD` isn't allowed")
|
||||
case "MAINTAINER", "FROM":
|
||||
return fmt.Errorf("%s isn't allowed as an ONBUILD trigger", n.Value)
|
||||
}
|
||||
|
||||
if err := b.dispatch(i, n); err != nil {
|
||||
return err
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
return nil
|
||||
}
|
||||
|
||||
// probeCache checks if `b.docker` implements builder.ImageCache and image-caching
|
||||
// is enabled (`b.UseCache`).
|
||||
// If so attempts to look up the current `b.image` and `b.runConfig` pair with `b.docker`.
|
||||
// If an image is found, probeCache returns `(true, nil)`.
|
||||
// If no image is found, it returns `(false, nil)`.
|
||||
// If there is any error, it returns `(false, err)`.
|
||||
func (b *Builder) probeCache() (bool, error) {
|
||||
c, ok := b.docker.(builder.ImageCache)
|
||||
if !ok || b.options.NoCache || b.cacheBusted {
|
||||
return false, nil
|
||||
}
|
||||
cache, err := c.GetCachedImageOnBuild(b.image, b.runConfig)
|
||||
if err != nil {
|
||||
return false, err
|
||||
}
|
||||
if len(cache) == 0 {
|
||||
logrus.Debugf("[BUILDER] Cache miss: %s", b.runConfig.Cmd)
|
||||
b.cacheBusted = true
|
||||
return false, nil
|
||||
}
|
||||
|
||||
fmt.Fprintf(b.Stdout, " ---> Using cache\n")
|
||||
logrus.Debugf("[BUILDER] Use cached version: %s", b.runConfig.Cmd)
|
||||
b.image = string(cache)
|
||||
|
||||
return true, nil
|
||||
}
|
||||
|
||||
func (b *Builder) create() (string, error) {
|
||||
if b.image == "" && !b.noBaseImage {
|
||||
return "", fmt.Errorf("Please provide a source image with `from` prior to run")
|
||||
}
|
||||
b.runConfig.Image = b.image
|
||||
|
||||
resources := container.Resources{
|
||||
CgroupParent: b.options.CgroupParent,
|
||||
CPUShares: b.options.CPUShares,
|
||||
CPUPeriod: b.options.CPUPeriod,
|
||||
CPUQuota: b.options.CPUQuota,
|
||||
CpusetCpus: b.options.CPUSetCPUs,
|
||||
CpusetMems: b.options.CPUSetMems,
|
||||
Memory: b.options.Memory,
|
||||
MemorySwap: b.options.MemorySwap,
|
||||
Ulimits: b.options.Ulimits,
|
||||
}
|
||||
|
||||
// TODO: why not embed a hostconfig in builder?
|
||||
hostConfig := &container.HostConfig{
|
||||
Isolation: b.options.IsolationLevel,
|
||||
ShmSize: b.options.ShmSize,
|
||||
Resources: resources,
|
||||
}
|
||||
|
||||
config := *b.runConfig
|
||||
|
||||
// Create the container
|
||||
c, err := b.docker.ContainerCreate(types.ContainerCreateConfig{
|
||||
Config: b.runConfig,
|
||||
HostConfig: hostConfig,
|
||||
})
|
||||
if err != nil {
|
||||
return "", err
|
||||
}
|
||||
for _, warning := range c.Warnings {
|
||||
fmt.Fprintf(b.Stdout, " ---> [Warning] %s\n", warning)
|
||||
}
|
||||
|
||||
b.tmpContainers[c.ID] = struct{}{}
|
||||
fmt.Fprintf(b.Stdout, " ---> Running in %s\n", stringid.TruncateID(c.ID))
|
||||
|
||||
if config.Cmd.Len() > 0 {
|
||||
// override the entry point that may have been picked up from the base image
|
||||
if err := b.docker.ContainerUpdateCmdOnBuild(c.ID, config.Cmd.Slice()); err != nil {
|
||||
return "", err
|
||||
}
|
||||
}
|
||||
|
||||
return c.ID, nil
|
||||
}
|
||||
|
||||
func (b *Builder) run(cID string) (err error) {
|
||||
errCh := make(chan error)
|
||||
go func() {
|
||||
errCh <- b.docker.ContainerAttachOnBuild(cID, nil, b.Stdout, b.Stderr, true)
|
||||
}()
|
||||
|
||||
finished := make(chan struct{})
|
||||
defer close(finished)
|
||||
go func() {
|
||||
select {
|
||||
case <-b.cancelled:
|
||||
logrus.Debugln("Build cancelled, killing and removing container:", cID)
|
||||
b.docker.ContainerKill(cID, 0)
|
||||
b.removeContainer(cID)
|
||||
case <-finished:
|
||||
}
|
||||
}()
|
||||
|
||||
if err := b.docker.ContainerStart(cID, nil); err != nil {
|
||||
return err
|
||||
}
|
||||
|
||||
// Block on reading output from container, stop on err or chan closed
|
||||
if err := <-errCh; err != nil {
|
||||
return err
|
||||
}
|
||||
|
||||
if ret, _ := b.docker.ContainerWait(cID, -1); ret != 0 {
|
||||
// TODO: change error type, because jsonmessage.JSONError assumes HTTP
|
||||
return &jsonmessage.JSONError{
|
||||
Message: fmt.Sprintf("The command '%s' returned a non-zero code: %d", b.runConfig.Cmd.ToString(), ret),
|
||||
Code: ret,
|
||||
}
|
||||
}
|
||||
|
||||
return nil
|
||||
}
|
||||
|
||||
func (b *Builder) removeContainer(c string) error {
|
||||
rmConfig := &types.ContainerRmConfig{
|
||||
ForceRemove: true,
|
||||
RemoveVolume: true,
|
||||
}
|
||||
if err := b.docker.ContainerRm(c, rmConfig); err != nil {
|
||||
fmt.Fprintf(b.Stdout, "Error removing intermediate container %s: %v\n", stringid.TruncateID(c), err)
|
||||
return err
|
||||
}
|
||||
return nil
|
||||
}
|
||||
|
||||
func (b *Builder) clearTmp() {
|
||||
for c := range b.tmpContainers {
|
||||
if err := b.removeContainer(c); err != nil {
|
||||
return
|
||||
}
|
||||
delete(b.tmpContainers, c)
|
||||
fmt.Fprintf(b.Stdout, "Removing intermediate container %s\n", stringid.TruncateID(c))
|
||||
}
|
||||
}
|
||||
|
||||
// readDockerfile reads a Dockerfile from the current context.
|
||||
func (b *Builder) readDockerfile() error {
|
||||
// If no -f was specified then look for 'Dockerfile'. If we can't find
|
||||
// that then look for 'dockerfile'. If neither are found then default
|
||||
// back to 'Dockerfile' and use that in the error message.
|
||||
if b.options.Dockerfile == "" {
|
||||
b.options.Dockerfile = api.DefaultDockerfileName
|
||||
if _, _, err := b.context.Stat(b.options.Dockerfile); os.IsNotExist(err) {
|
||||
lowercase := strings.ToLower(b.options.Dockerfile)
|
||||
if _, _, err := b.context.Stat(lowercase); err == nil {
|
||||
b.options.Dockerfile = lowercase
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
f, err := b.context.Open(b.options.Dockerfile)
|
||||
if err != nil {
|
||||
if os.IsNotExist(err) {
|
||||
return fmt.Errorf("Cannot locate specified Dockerfile: %s", b.options.Dockerfile)
|
||||
}
|
||||
return err
|
||||
}
|
||||
if f, ok := f.(*os.File); ok {
|
||||
// ignoring error because Open already succeeded
|
||||
fi, err := f.Stat()
|
||||
if err != nil {
|
||||
return fmt.Errorf("Unexpected error reading Dockerfile: %v", err)
|
||||
}
|
||||
if fi.Size() == 0 {
|
||||
return fmt.Errorf("The Dockerfile (%s) cannot be empty", b.options.Dockerfile)
|
||||
}
|
||||
}
|
||||
b.dockerfile, err = parser.Parse(f)
|
||||
f.Close()
|
||||
if err != nil {
|
||||
return err
|
||||
}
|
||||
|
||||
// After the Dockerfile has been parsed, we need to check the .dockerignore
|
||||
// file for either "Dockerfile" or ".dockerignore", and if either are
|
||||
// present then erase them from the build context. These files should never
|
||||
// have been sent from the client but we did send them to make sure that
|
||||
// we had the Dockerfile to actually parse, and then we also need the
|
||||
// .dockerignore file to know whether either file should be removed.
|
||||
// Note that this assumes the Dockerfile has been read into memory and
|
||||
// is now safe to be removed.
|
||||
if dockerIgnore, ok := b.context.(builder.DockerIgnoreContext); ok {
|
||||
dockerIgnore.Process([]string{b.options.Dockerfile})
|
||||
}
|
||||
return nil
|
||||
}
|
||||
|
||||
// determine if build arg is part of built-in args or user
|
||||
// defined args in Dockerfile at any point in time.
|
||||
func (b *Builder) isBuildArgAllowed(arg string) bool {
|
||||
if _, ok := BuiltinAllowedBuildArgs[arg]; ok {
|
||||
return true
|
||||
}
|
||||
if _, ok := b.allowedBuildArgs[arg]; ok {
|
||||
return true
|
||||
}
|
||||
return false
|
||||
}
|
||||
Reference in New Issue
Block a user