packer-cn/main.go

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// This is the main package for the `packer` application.
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//go:generate go run ./scripts/generate-plugins.go
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//go:generate go generate ./common/bootcommand/...
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package main
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import (
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"fmt"
"io"
"io/ioutil"
"log"
"math/rand"
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"os"
"runtime"
"sync"
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"syscall"
"time"
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"github.com/hashicorp/go-uuid"
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"github.com/hashicorp/packer/command"
"github.com/hashicorp/packer/packer"
"github.com/hashicorp/packer/packer/plugin"
Add tmp package that offers Dir & File funcs this regroups the calls of tmp func calls into one package. the tmp pkg allows to store tmp files under a common directory for easier managment Squashed commit of the following: commit 74b674c01560c6b547e9cab5e8afb486f0fe7d6c Merge: fc94b5714 66001525d Author: Matthew Patton <mpatton@enquizit.com> Date: Fri Nov 2 02:02:38 2018 -0400 Merge branch 'remove_TMPDIR_docs' of github.com:tb3088/packer into remove_TMPDIR_docs commit fc94b571428447aaf2e5171967c95cdf9e5c73ff Author: Matthew Patton <mpatton@enquizit.com> Date: Fri Nov 2 01:42:38 2018 -0400 update tests to honor configured temporary directory commit 5a562359f4937af506607dd96ed1c46426093f52 Author: Matthew Patton <mpatton@enquizit.com> Date: Thu Nov 1 18:52:38 2018 -0400 sync straggler to refactor. implement tests at packer/configfile instead of buried in docker. commit 9d5a4a0935bfd049e2f8f50ad73e4455b42c9410 Author: Matthew Patton <mpatton@enquizit.com> Date: Thu Nov 1 15:39:46 2018 -0400 insert URL to GoLang API for os.TempDir() commit fbae4c2e051898aecd8705e9d8a20353430ede23 Author: Matthew Patton <mpatton@enquizit.com> Date: Thu Nov 1 07:41:29 2018 -0400 revise documentation to match code commit 3590fae8bd0afa92a161a49ed794ee32e357d583 Author: Matthew Patton <mpatton@enquizit.com> Date: Thu Nov 1 07:21:59 2018 -0400 refacter config_file. replace all hard-coded os.TempDir with wrapper commit d5c5306a97b648ded06a8eb76ce728f07c9924f0 Author: Matthew Patton <mpatton@enquizit.com> Date: Wed Oct 31 20:11:36 2018 -0400 close massive file overwrite hole with TempDir commit 0a72297da86089fbd07e4f7d9472a92fa4d1c733 Author: Matthew Patton <mpatton@enquizit.com> Date: Wed Oct 31 01:06:00 2018 -0400 adjust var declaration scope commit 20f68228b6c372d984ea5b055cfc8bda9b110ac5 Author: Matthew Patton <mpatton@enquizit.com> Date: Wed Oct 31 00:54:35 2018 -0400 use mktemp() equivalent to create temporary directory commit c73ebe3d8321664a2685a0baa8e441dd895b0db4 Author: Matthew Patton <mpatton@enquizit.com> Date: Tue Oct 30 20:40:58 2018 -0400 remove extraneous variable declaration, fix FOR loop commit 63549b8bd745a0090b15ed0b0ebf644162db27db Author: Matthew Patton <mpatton@enquizit.com> Date: Tue Oct 30 19:30:44 2018 -0400 match styistic convension with rest of docs commit 976101074942db36f10d3a686d6d29ddb7c01926 Author: Matthew Patton <mpatton@enquizit.com> Date: Tue Oct 30 19:08:39 2018 -0400 revert dangling config file change commit 95159afbc05eac96ed11c3183af5fb0abe2f2d5c Author: Matthew Patton <matthew.patton@itgfirm.com> Date: Fri Dec 29 23:53:43 2017 -0500 replace invalid TMPDIR variable wth PACKER_TMP_DIR. update ConfigTmpDir() to try common temporary paths first and only write to configDir() as a last resort. commit 66001525d72de56a4cf9339b900c46f59bc6e91a Author: Matthew Patton <mpatton@enquizit.com> Date: Fri Nov 2 01:42:38 2018 -0400 update tests to honor configured temporary directory commit e9b6adefeae8c65eb8aa47fef38cbf0aa424338c Author: Matthew Patton <mpatton@enquizit.com> Date: Thu Nov 1 18:52:38 2018 -0400 sync straggler to refactor. implement tests at packer/configfile instead of buried in docker. commit 852113ed076e2d14e5dca6815ea680da1e2896bb Author: Matthew Patton <mpatton@enquizit.com> Date: Thu Nov 1 15:39:46 2018 -0400 insert URL to GoLang API for os.TempDir() commit 54add38d1d1c6e283cd444b367ed8bd49a5f3699 Author: Matthew Patton <mpatton@enquizit.com> Date: Thu Nov 1 07:41:29 2018 -0400 revise documentation to match code commit 6b5b8f6d4edad0e187ca13d64ac4118f34eee643 Author: Matthew Patton <mpatton@enquizit.com> Date: Thu Nov 1 07:21:59 2018 -0400 refacter config_file. replace all hard-coded os.TempDir with wrapper commit c22092c601c33484327674f322c7379fa41506d7 Author: Matthew Patton <mpatton@enquizit.com> Date: Wed Oct 31 20:11:36 2018 -0400 close massive file overwrite hole with TempDir commit 7a730450916bf8e5dbc2a741ec233a49466ab7cc Author: Matthew Patton <mpatton@enquizit.com> Date: Wed Oct 31 01:06:00 2018 -0400 adjust var declaration scope commit 0f2933adb6f6922dfeab78a95371a444ec8918ab Author: Matthew Patton <mpatton@enquizit.com> Date: Wed Oct 31 00:54:35 2018 -0400 use mktemp() equivalent to create temporary directory commit d74839ede05dacf712b55a7bb48aec19fe6b007f Author: Matthew Patton <mpatton@enquizit.com> Date: Tue Oct 30 20:40:58 2018 -0400 remove extraneous variable declaration, fix FOR loop commit eb65416619437e4a3dec90277770803dd5b2281c Author: Matthew Patton <mpatton@enquizit.com> Date: Tue Oct 30 19:30:44 2018 -0400 match styistic convension with rest of docs commit acaa2b31ed463219c4ef099f351eec72406e2989 Author: Matthew Patton <mpatton@enquizit.com> Date: Tue Oct 30 19:08:39 2018 -0400 revert dangling config file change commit e573fde668dcb418561e61535c1d68b2888f5b0f Author: Matthew Patton <matthew.patton@itgfirm.com> Date: Fri Dec 29 23:53:43 2017 -0500 replace invalid TMPDIR variable wth PACKER_TMP_DIR. update ConfigTmpDir() to try common temporary paths first and only write to configDir() as a last resort. commit 39a9874afc9dea71b36753375fb7feb61ffecf69 Merge: 8a413cfe8 3315812c2 Author: Matthew Patton <mpatton@enquizit.com> Date: Tue Oct 30 18:19:26 2018 -0400 Merge branch 'master' of https://github.com/hashicorp/packer into prestine commit 8a413cfe83b0a70dbd99c32d936334ca5788ca9b Merge: e07491de5 4e14710a6 Author: Matthew Patton <mpatton@enquizit.com> Date: Mon Oct 1 20:18:10 2018 -0400 Merge remote-tracking branch 'upstream/master' into prestine commit e07491de59cead0b337a7f57f4a6c625e1f560ab Merge: 42610a35d a1fa35dff Author: Matthew Patton <mpatton@enquizit.com> Date: Tue Aug 21 13:26:19 2018 -0400 Merge remote-tracking branch 'upstream/master' into prestine commit 42610a35d5ef65af8844a58ad70e2ec75262da6a Merge: 5298142da 0d63cf7bc Author: Matthew Patton <matthew.patton@itgfirm.com> Date: Tue Jun 19 22:45:05 2018 -0400 Merge remote-tracking branch 'upstream/master' into prestine commit 5298142da6da95354844f201deeeef3c599e48b2 Merge: 7bb110bc7 9d9736552 Author: Matthew Patton <mpatton@enquizit.com> Date: Mon Jun 11 15:10:09 2018 -0400 Merge remote-tracking branch 'upstream/master' into prestine commit 7bb110bc744c9797fcaec25a265d9b85a22d6d6b Merge: a61c869ca 6189d66e7 Author: Matthew Patton <matthew.patton@itgfirm.com> Date: Wed May 9 23:41:22 2018 -0400 Merge remote-tracking branch 'upstream/master' into prestine commit a61c869ca7268acf0e3b1e1fa7a8ee7feea65984 Merge: 098101dd9 4be5f072c Author: Matthew Patton <matthew.patton@itgfirm.com> Date: Fri May 4 10:13:04 2018 -0400 Merge remote-tracking branch 'upstream/master' into prestine commit 098101dd99f08b0ca110d33eff6904537c6d21de Merge: fefaf0fa6 554b2b4a5 Author: Matthew Patton <matthew.patton@itgfirm.com> Date: Tue May 1 20:52:30 2018 -0400 Merge branch 'EOL-handling' into prestine Co-Authored-By: Matthew Patton <pattonme@yahoo.com>
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"github.com/hashicorp/packer/packer/tmp"
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"github.com/hashicorp/packer/version"
"github.com/mitchellh/cli"
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"github.com/mitchellh/panicwrap"
"github.com/mitchellh/prefixedio"
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)
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func main() {
// Call realMain instead of doing the work here so we can use
// `defer` statements within the function and have them work properly.
// (defers aren't called with os.Exit)
os.Exit(realMain())
}
// realMain is executed from main and returns the exit status to exit with.
func realMain() int {
var wrapConfig panicwrap.WrapConfig
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// When following env variable is set, packer
// wont panic wrap itself as it's already wrapped.
// i.e.: when terraform runs it.
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wrapConfig.CookieKey = "PACKER_WRAP_COOKIE"
wrapConfig.CookieValue = "49C22B1A-3A93-4C98-97FA-E07D18C787B5"
if !panicwrap.Wrapped(&wrapConfig) {
// Generate a UUID for this packer run and pass it to the environment.
// GenerateUUID always returns a nil error (based on rand.Read) so we'll
// just ignore it.
UUID, _ := uuid.GenerateUUID()
os.Setenv("PACKER_RUN_UUID", UUID)
// Determine where logs should go in general (requested by the user)
logWriter, err := logOutput()
if err != nil {
fmt.Fprintf(os.Stderr, "Couldn't setup log output: %s", err)
return 1
}
if logWriter == nil {
logWriter = ioutil.Discard
}
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packer.LogSecretFilter.SetOutput(logWriter)
//packer.LogSecrets.
// Disable logging here
log.SetOutput(ioutil.Discard)
// We always send logs to a temporary file that we use in case
// there is a panic. Otherwise, we delete it.
Add tmp package that offers Dir & File funcs this regroups the calls of tmp func calls into one package. the tmp pkg allows to store tmp files under a common directory for easier managment Squashed commit of the following: commit 74b674c01560c6b547e9cab5e8afb486f0fe7d6c Merge: fc94b5714 66001525d Author: Matthew Patton <mpatton@enquizit.com> Date: Fri Nov 2 02:02:38 2018 -0400 Merge branch 'remove_TMPDIR_docs' of github.com:tb3088/packer into remove_TMPDIR_docs commit fc94b571428447aaf2e5171967c95cdf9e5c73ff Author: Matthew Patton <mpatton@enquizit.com> Date: Fri Nov 2 01:42:38 2018 -0400 update tests to honor configured temporary directory commit 5a562359f4937af506607dd96ed1c46426093f52 Author: Matthew Patton <mpatton@enquizit.com> Date: Thu Nov 1 18:52:38 2018 -0400 sync straggler to refactor. implement tests at packer/configfile instead of buried in docker. commit 9d5a4a0935bfd049e2f8f50ad73e4455b42c9410 Author: Matthew Patton <mpatton@enquizit.com> Date: Thu Nov 1 15:39:46 2018 -0400 insert URL to GoLang API for os.TempDir() commit fbae4c2e051898aecd8705e9d8a20353430ede23 Author: Matthew Patton <mpatton@enquizit.com> Date: Thu Nov 1 07:41:29 2018 -0400 revise documentation to match code commit 3590fae8bd0afa92a161a49ed794ee32e357d583 Author: Matthew Patton <mpatton@enquizit.com> Date: Thu Nov 1 07:21:59 2018 -0400 refacter config_file. replace all hard-coded os.TempDir with wrapper commit d5c5306a97b648ded06a8eb76ce728f07c9924f0 Author: Matthew Patton <mpatton@enquizit.com> Date: Wed Oct 31 20:11:36 2018 -0400 close massive file overwrite hole with TempDir commit 0a72297da86089fbd07e4f7d9472a92fa4d1c733 Author: Matthew Patton <mpatton@enquizit.com> Date: Wed Oct 31 01:06:00 2018 -0400 adjust var declaration scope commit 20f68228b6c372d984ea5b055cfc8bda9b110ac5 Author: Matthew Patton <mpatton@enquizit.com> Date: Wed Oct 31 00:54:35 2018 -0400 use mktemp() equivalent to create temporary directory commit c73ebe3d8321664a2685a0baa8e441dd895b0db4 Author: Matthew Patton <mpatton@enquizit.com> Date: Tue Oct 30 20:40:58 2018 -0400 remove extraneous variable declaration, fix FOR loop commit 63549b8bd745a0090b15ed0b0ebf644162db27db Author: Matthew Patton <mpatton@enquizit.com> Date: Tue Oct 30 19:30:44 2018 -0400 match styistic convension with rest of docs commit 976101074942db36f10d3a686d6d29ddb7c01926 Author: Matthew Patton <mpatton@enquizit.com> Date: Tue Oct 30 19:08:39 2018 -0400 revert dangling config file change commit 95159afbc05eac96ed11c3183af5fb0abe2f2d5c Author: Matthew Patton <matthew.patton@itgfirm.com> Date: Fri Dec 29 23:53:43 2017 -0500 replace invalid TMPDIR variable wth PACKER_TMP_DIR. update ConfigTmpDir() to try common temporary paths first and only write to configDir() as a last resort. commit 66001525d72de56a4cf9339b900c46f59bc6e91a Author: Matthew Patton <mpatton@enquizit.com> Date: Fri Nov 2 01:42:38 2018 -0400 update tests to honor configured temporary directory commit e9b6adefeae8c65eb8aa47fef38cbf0aa424338c Author: Matthew Patton <mpatton@enquizit.com> Date: Thu Nov 1 18:52:38 2018 -0400 sync straggler to refactor. implement tests at packer/configfile instead of buried in docker. commit 852113ed076e2d14e5dca6815ea680da1e2896bb Author: Matthew Patton <mpatton@enquizit.com> Date: Thu Nov 1 15:39:46 2018 -0400 insert URL to GoLang API for os.TempDir() commit 54add38d1d1c6e283cd444b367ed8bd49a5f3699 Author: Matthew Patton <mpatton@enquizit.com> Date: Thu Nov 1 07:41:29 2018 -0400 revise documentation to match code commit 6b5b8f6d4edad0e187ca13d64ac4118f34eee643 Author: Matthew Patton <mpatton@enquizit.com> Date: Thu Nov 1 07:21:59 2018 -0400 refacter config_file. replace all hard-coded os.TempDir with wrapper commit c22092c601c33484327674f322c7379fa41506d7 Author: Matthew Patton <mpatton@enquizit.com> Date: Wed Oct 31 20:11:36 2018 -0400 close massive file overwrite hole with TempDir commit 7a730450916bf8e5dbc2a741ec233a49466ab7cc Author: Matthew Patton <mpatton@enquizit.com> Date: Wed Oct 31 01:06:00 2018 -0400 adjust var declaration scope commit 0f2933adb6f6922dfeab78a95371a444ec8918ab Author: Matthew Patton <mpatton@enquizit.com> Date: Wed Oct 31 00:54:35 2018 -0400 use mktemp() equivalent to create temporary directory commit d74839ede05dacf712b55a7bb48aec19fe6b007f Author: Matthew Patton <mpatton@enquizit.com> Date: Tue Oct 30 20:40:58 2018 -0400 remove extraneous variable declaration, fix FOR loop commit eb65416619437e4a3dec90277770803dd5b2281c Author: Matthew Patton <mpatton@enquizit.com> Date: Tue Oct 30 19:30:44 2018 -0400 match styistic convension with rest of docs commit acaa2b31ed463219c4ef099f351eec72406e2989 Author: Matthew Patton <mpatton@enquizit.com> Date: Tue Oct 30 19:08:39 2018 -0400 revert dangling config file change commit e573fde668dcb418561e61535c1d68b2888f5b0f Author: Matthew Patton <matthew.patton@itgfirm.com> Date: Fri Dec 29 23:53:43 2017 -0500 replace invalid TMPDIR variable wth PACKER_TMP_DIR. update ConfigTmpDir() to try common temporary paths first and only write to configDir() as a last resort. commit 39a9874afc9dea71b36753375fb7feb61ffecf69 Merge: 8a413cfe8 3315812c2 Author: Matthew Patton <mpatton@enquizit.com> Date: Tue Oct 30 18:19:26 2018 -0400 Merge branch 'master' of https://github.com/hashicorp/packer into prestine commit 8a413cfe83b0a70dbd99c32d936334ca5788ca9b Merge: e07491de5 4e14710a6 Author: Matthew Patton <mpatton@enquizit.com> Date: Mon Oct 1 20:18:10 2018 -0400 Merge remote-tracking branch 'upstream/master' into prestine commit e07491de59cead0b337a7f57f4a6c625e1f560ab Merge: 42610a35d a1fa35dff Author: Matthew Patton <mpatton@enquizit.com> Date: Tue Aug 21 13:26:19 2018 -0400 Merge remote-tracking branch 'upstream/master' into prestine commit 42610a35d5ef65af8844a58ad70e2ec75262da6a Merge: 5298142da 0d63cf7bc Author: Matthew Patton <matthew.patton@itgfirm.com> Date: Tue Jun 19 22:45:05 2018 -0400 Merge remote-tracking branch 'upstream/master' into prestine commit 5298142da6da95354844f201deeeef3c599e48b2 Merge: 7bb110bc7 9d9736552 Author: Matthew Patton <mpatton@enquizit.com> Date: Mon Jun 11 15:10:09 2018 -0400 Merge remote-tracking branch 'upstream/master' into prestine commit 7bb110bc744c9797fcaec25a265d9b85a22d6d6b Merge: a61c869ca 6189d66e7 Author: Matthew Patton <matthew.patton@itgfirm.com> Date: Wed May 9 23:41:22 2018 -0400 Merge remote-tracking branch 'upstream/master' into prestine commit a61c869ca7268acf0e3b1e1fa7a8ee7feea65984 Merge: 098101dd9 4be5f072c Author: Matthew Patton <matthew.patton@itgfirm.com> Date: Fri May 4 10:13:04 2018 -0400 Merge remote-tracking branch 'upstream/master' into prestine commit 098101dd99f08b0ca110d33eff6904537c6d21de Merge: fefaf0fa6 554b2b4a5 Author: Matthew Patton <matthew.patton@itgfirm.com> Date: Tue May 1 20:52:30 2018 -0400 Merge branch 'EOL-handling' into prestine Co-Authored-By: Matthew Patton <pattonme@yahoo.com>
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logTempFile, err := tmp.File("packer-log")
if err != nil {
fmt.Fprintf(os.Stderr, "Couldn't setup logging tempfile: %s", err)
return 1
}
defer os.Remove(logTempFile.Name())
defer logTempFile.Close()
// Tell the logger to log to this file
os.Setenv(EnvLog, "")
os.Setenv(EnvLogFile, "")
// Setup the prefixed readers that send data properly to
// stdout/stderr.
doneCh := make(chan struct{})
outR, outW := io.Pipe()
go copyOutput(outR, doneCh)
// Enable checkpoint for panic reporting
if config, _ := loadConfig(); config != nil && !config.DisableCheckpoint {
packer.CheckpointReporter = packer.NewCheckpointReporter(
config.DisableCheckpointSignature,
)
}
// Create the configuration for panicwrap and wrap our executable
wrapConfig.Handler = panicHandler(logTempFile)
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wrapConfig.Writer = io.MultiWriter(logTempFile, &packer.LogSecretFilter)
wrapConfig.Stdout = outW
wrapConfig.DetectDuration = 500 * time.Millisecond
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wrapConfig.ForwardSignals = []os.Signal{syscall.SIGTERM}
exitStatus, err := panicwrap.Wrap(&wrapConfig)
if err != nil {
fmt.Fprintf(os.Stderr, "Couldn't start Packer: %s", err)
return 1
}
// If >= 0, we're the parent, so just exit
if exitStatus >= 0 {
// Close the stdout writer so that our copy process can finish
outW.Close()
// Wait for the output copying to finish
<-doneCh
return exitStatus
}
// We're the child, so just close the tempfile we made in order to
// save file handles since the tempfile is only used by the parent.
logTempFile.Close()
}
// Call the real main
return wrappedMain()
}
// wrappedMain is called only when we're wrapped by panicwrap and
// returns the exit status to exit with.
func wrappedMain() int {
// If there is no explicit number of Go threads to use, then set it
if os.Getenv("GOMAXPROCS") == "" {
runtime.GOMAXPROCS(runtime.NumCPU())
}
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packer.LogSecretFilter.SetOutput(os.Stderr)
log.SetOutput(&packer.LogSecretFilter)
log.Printf("[INFO] Packer version: %s", version.FormattedVersion())
log.Printf("Packer Target OS/Arch: %s %s", runtime.GOOS, runtime.GOARCH)
log.Printf("Built with Go Version: %s", runtime.Version())
inPlugin := os.Getenv(plugin.MagicCookieKey) == plugin.MagicCookieValue
config, err := loadConfig()
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if err != nil {
fmt.Fprintf(os.Stderr, "Error loading configuration: \n\n%s\n", err)
return 1
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}
log.Printf("Packer config: %+v", config)
// Fire off the checkpoint.
go runCheckpoint(config)
if !config.DisableCheckpoint {
packer.CheckpointReporter = packer.NewCheckpointReporter(
config.DisableCheckpointSignature,
)
}
cacheDir, err := packer.CachePath()
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if err != nil {
fmt.Fprintf(os.Stderr, "Error preparing cache directory: \n\n%s\n", err)
return 1
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}
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log.Printf("Setting cache directory: %s", cacheDir)
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// Determine if we're in machine-readable mode by mucking around with
// the arguments...
args, machineReadable := extractMachineReadable(os.Args[1:])
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defer plugin.CleanupClients()
var ui packer.Ui
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if machineReadable {
// Setup the UI as we're being machine-readable
ui = &packer.MachineReadableUi{
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Writer: os.Stdout,
}
// Set this so that we don't get colored output in our machine-
// readable UI.
if err := os.Setenv("PACKER_NO_COLOR", "1"); err != nil {
fmt.Fprintf(os.Stderr, "Packer failed to initialize UI: %s\n", err)
return 1
}
} else {
basicUi := &packer.BasicUi{
Reader: os.Stdin,
Writer: os.Stdout,
ErrorWriter: os.Stdout,
}
ui = basicUi
if !inPlugin {
if TTY, err := openTTY(); err != nil {
fmt.Fprintf(os.Stderr, "No tty available: %s\n", err)
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} else {
basicUi.TTY = TTY
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defer TTY.Close()
}
}
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}
// Create the CLI meta
CommandMeta = &command.Meta{
CoreConfig: &packer.CoreConfig{
Components: packer.ComponentFinder{
Builder: config.LoadBuilder,
Hook: config.LoadHook,
PostProcessor: config.LoadPostProcessor,
Provisioner: config.LoadProvisioner,
},
Version: version.Version,
},
Ui: ui,
}
cli := &cli.CLI{
Args: args,
Autocomplete: true,
Commands: Commands,
HelpFunc: excludeHelpFunc(Commands, []string{"plugin"}),
HelpWriter: os.Stdout,
Name: "packer",
Version: version.Version,
}
exitCode, err := cli.Run()
if !inPlugin {
if err := packer.CheckpointReporter.Finalize(cli.Subcommand(), exitCode, err); err != nil {
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log.Printf("[WARN] (telemetry) Error finalizing report. This is safe to ignore. %s", err.Error())
}
}
if err != nil {
fmt.Fprintf(os.Stderr, "Error executing CLI: %s\n", err)
return 1
}
return exitCode
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}
// excludeHelpFunc filters commands we don't want to show from the list of
// commands displayed in packer's help text.
func excludeHelpFunc(commands map[string]cli.CommandFactory, exclude []string) cli.HelpFunc {
// Make search slice into a map so we can use use the `if found` idiom
// instead of a nested loop.
var excludes = make(map[string]interface{}, len(exclude))
for _, item := range exclude {
excludes[item] = nil
}
// Create filtered list of commands
helpCommands := []string{}
for command := range commands {
if _, found := excludes[command]; !found {
helpCommands = append(helpCommands, command)
}
}
return cli.FilteredHelpFunc(helpCommands, cli.BasicHelpFunc("packer"))
}
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// extractMachineReadable checks the args for the machine readable
// flag and returns whether or not it is on. It modifies the args
// to remove this flag.
func extractMachineReadable(args []string) ([]string, bool) {
for i, arg := range args {
if arg == "-machine-readable" {
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// We found it. Slice it out.
result := make([]string, len(args)-1)
copy(result, args[:i])
copy(result[i:], args[i+1:])
return result, true
}
}
return args, false
}
func loadConfig() (*config, error) {
var config config
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config.PluginMinPort = 10000
config.PluginMaxPort = 25000
if err := config.Discover(); err != nil {
return nil, err
}
configFilePath := os.Getenv("PACKER_CONFIG")
if configFilePath != "" {
log.Printf("'PACKER_CONFIG' set, loading config from environment.")
} else {
var err error
configFilePath, err = packer.ConfigFile()
if err != nil {
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log.Printf("Error detecting default config file path: %s", err)
}
}
if configFilePath == "" {
return &config, nil
}
log.Printf("Attempting to open config file: %s", configFilePath)
f, err := os.Open(configFilePath)
if err != nil {
if !os.IsNotExist(err) {
return nil, err
}
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log.Printf("[WARN] Config file doesn't exist: %s", configFilePath)
return &config, nil
}
defer f.Close()
if err := decodeConfig(f, &config); err != nil {
return nil, err
}
return &config, nil
}
// copyOutput uses output prefixes to determine whether data on stdout
// should go to stdout or stderr. This is due to panicwrap using stderr
// as the log and error channel.
func copyOutput(r io.Reader, doneCh chan<- struct{}) {
defer close(doneCh)
pr, err := prefixedio.NewReader(r)
if err != nil {
panic(err)
}
stderrR, err := pr.Prefix(ErrorPrefix)
if err != nil {
panic(err)
}
stdoutR, err := pr.Prefix(OutputPrefix)
if err != nil {
panic(err)
}
defaultR, err := pr.Prefix("")
if err != nil {
panic(err)
}
var wg sync.WaitGroup
wg.Add(3)
go func() {
defer wg.Done()
io.Copy(os.Stderr, stderrR)
}()
go func() {
defer wg.Done()
io.Copy(os.Stdout, stdoutR)
}()
go func() {
defer wg.Done()
io.Copy(os.Stdout, defaultR)
}()
wg.Wait()
}
func init() {
// Seed the random number generator
rand.Seed(time.Now().UTC().UnixNano())
}