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package main
import (
"fmt"
"io/ioutil"
"log"
"os"
"path"
"github.com/docker/go-units"
"github.com/go-debos/debos"
"github.com/go-debos/debos/recipe"
"github.com/go-debos/fakemachine"
"github.com/jessevdk/go-flags"
)
func checkError(context debos.DebosContext, err error, a debos.Action, stage string) int {
if err == nil {
return 0
}
log.Printf("Action `%s` failed at stage %s, error: %s", a, stage, err)
debos.DebugShell(context)
return 1
}
func main() {
var context debos.DebosContext
var options struct {
ArtifactDir string `long:"artifactdir"`
InternalImage string `long:"internal-image" hidden:"true"`
TemplateVars map[string]string `short:"t" long:"template-var" description:"Template variables"`
DebugShell bool `long:"debug-shell" description:"Fall into interactive shell on error"`
Shell string `short:"s" long:"shell" description:"Redefine interactive shell binary (default: bash)" optionsl:"" default:"/bin/bash"`
ScratchSize string `long:"scratchsize" description:"Size of disk backed scratch space"`
}
var exitcode int = 0
// Allow to run all deferred calls prior to os.Exit()
defer func() {
os.Exit(exitcode)
}()
parser := flags.NewParser(&options, flags.Default)
args, err := parser.Parse()
if err != nil {
flagsErr, ok := err.(*flags.Error)
if ok && flagsErr.Type == flags.ErrHelp {
return
} else {
fmt.Printf("%v\n", flagsErr)
exitcode = 1
return
}
}
if len(args) != 1 {
log.Println("No recipe given!")
exitcode = 1
return
}
// Set interactive shell binary only if '--debug-shell' options passed
if options.DebugShell {
context.DebugShell = options.Shell
}
file := args[0]
file = debos.CleanPath(file)
r := recipe.Recipe{}
if _, err := os.Stat(file); os.IsNotExist(err) {
log.Println(err)
exitcode = 1
return
}
if err := r.Parse(file, options.TemplateVars); err != nil {
log.Println(err)
exitcode = 1
return
}
/* If fakemachine is supported the outer fake machine will never use the
* scratchdir, so just set it to /scrach as a dummy to prevent the outer
* debos createing a temporary direction */
if fakemachine.InMachine() || fakemachine.Supported() {
context.Scratchdir = "/scratch"
} else {
log.Printf("fakemachine not supported, running on the host!")
cwd, _ := os.Getwd()
context.Scratchdir, err = ioutil.TempDir(cwd, ".debos-")
defer os.RemoveAll(context.Scratchdir)
}
context.Rootdir = path.Join(context.Scratchdir, "root")
context.Image = options.InternalImage
context.RecipeDir = path.Dir(file)
context.Artifactdir = options.ArtifactDir
if context.Artifactdir == "" {
context.Artifactdir, _ = os.Getwd()
}
context.Artifactdir = debos.CleanPath(context.Artifactdir)
// Initialise origins map
context.Origins = make(map[string]string)
context.Origins["artifacts"] = context.Artifactdir
context.Origins["filesystem"] = context.Rootdir
context.Origins["recipe"] = context.RecipeDir
context.Architecture = r.Architecture
for _, a := range r.Actions {
err = a.Verify(&context)
if exitcode = checkError(context, err, a, "Verify"); exitcode != 0 {
return
}
}
if !fakemachine.InMachine() && fakemachine.Supported() {
m := fakemachine.NewMachine()
var args []string
if options.ScratchSize != "" {
size, err := units.FromHumanSize(options.ScratchSize)
if err != nil {
fmt.Printf("Couldn't parse scratch size: %v\n", err)
exitcode = 1
return
}
m.SetScratch(size, "")
}
m.AddVolume(context.Artifactdir)
args = append(args, "--artifactdir", context.Artifactdir)
for k, v := range options.TemplateVars {
args = append(args, "--template-var", fmt.Sprintf("%s:\"%s\"", k, v))
}
m.AddVolume(context.RecipeDir)
args = append(args, file)
if options.DebugShell {
args = append(args, "--debug-shell")
args = append(args, "--shell", fmt.Sprintf("%s", options.Shell))
}
for _, a := range r.Actions {
err = a.PreMachine(&context, m, &args)
if exitcode = checkError(context, err, a, "PreMachine"); exitcode != 0 {
return
}
}
exitcode, err = m.RunInMachineWithArgs(args)
if err != nil {
fmt.Println(err)
return
}
if exitcode != 0 {
return
}
for _, a := range r.Actions {
err = a.PostMachine(context)
if exitcode = checkError(context, err, a, "Postmachine"); exitcode != 0 {
return
}
}
log.Printf("==== Recipe done ====")
return
}
if !fakemachine.InMachine() {
for _, a := range r.Actions {
err = a.PreNoMachine(&context)
if exitcode = checkError(context, err, a, "PreNoMachine"); exitcode != 0 {
return
}
}
}
// Create Rootdir
if _, err = os.Stat(context.Rootdir); os.IsNotExist(err) {
err = os.Mkdir(context.Rootdir, 0755)
if err != nil && os.IsNotExist(err) {
exitcode = 1
return
}
}
for _, a := range r.Actions {
err = a.Run(&context)
if exitcode = checkError(context, err, a, "Run"); exitcode != 0 {
return
}
}
for _, a := range r.Actions {
err = a.Cleanup(context)
if exitcode = checkError(context, err, a, "Cleanup"); exitcode != 0 {
return
}
}
if !fakemachine.InMachine() {
for _, a := range r.Actions {
err = a.PostMachine(context)
if exitcode = checkError(context, err, a, "PostMachine"); exitcode != 0 {
return
}
}
log.Printf("==== Recipe done ====")
}
}
|
