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Fix issue when loading single plugin type 

This changes wraps the plugin client start call with an anonymous function so that Packer starts a
new plugin for each occurrence of a particular plugin block.

Before only one subprocess was being created causing subsquent calls to fail as it was trying start
an already started plugin subprocess.

Before Change
```
???????: failed loading comment: error dial unix /tmp/packer-plugin358226172: connect: no such file or directory
2021/02/05 16:09:13 On error:
2021/02/05 16:09:13 Waiting on builds to complete...

2021/02/05 16:09:13 Starting build run: null.basic-example
2021/02/05 16:09:13 Running builder:
2021/02/05 16:09:13 [INFO] (telemetry) Starting builder
  on examples/basic-example.pkr.hcl line 29:
  (source code not available)

dial unix /tmp/packer-plugin358226172: connect: no such file or directory

???????: failed loading comment: error dial unix /tmp/packer-plugin358226172: connect: no such file or directory

2021/02/05 16:09:13 packer.test plugin: [INFO] communicator disabled, will not connect
2021/02/05 16:09:13 packer.test plugin: Unable to load communicator config from state to populate provisionHookData
  on examples/basic-example.pkr.hcl line 38:
2021/02/05 16:09:13 packer.test plugin: Running the provision hook
  (source code not available)

dial unix /tmp/packer-plugin358226172: connect: no such file or directory

???????: failed loading comment: error dial unix /tmp/packer-plugin358226172: connect: no such file or directory

  on examples/basic-example.pkr.hcl line 42:
  (source code not available)

2021/02/05 16:09:13 [INFO] (telemetry) Starting provisioner comment
dial unix /tmp/packer-plugin358226172: connect: no such file or directory
```

After change
```

null.basic-example: output will be in this color.

==> null.basic-example:   ____                   _
==> null.basic-example:  | __ )    ___    __ _  (_)  _ __
==> null.basic-example:  |  _ \   / _ \  / _` | | | | '_ \
==> null.basic-example:  | |_) | |  __/ | (_| | | | | | | |
==> null.basic-example:  |____/   \___|  \__, | |_| |_| |_|
==> null.basic-example:                  |___/
==> null.basic-example:
==> null.basic-example: Running local shell script: /tmp/packer-shell646549657
    null.basic-example: This is a shell script
==> null.basic-example: Pausing at breakpoint provisioner.
==> null.basic-example: Press enter to continue.
==> null.basic-example: In the middle of Provisioning run
==> null.basic-example: Running local shell script: /tmp/packer-shell177279484
    null.basic-example: This is another shell script
==> null.basic-example:   _____               _
==> null.basic-example:  | ____|  _ __     __| |
==> null.basic-example:  |  _|   | '_ \   / _` |
==> null.basic-example:  | |___  | | | | | (_| |
==> null.basic-example:  |_____| |_| |_|  \__,_|
==> null.basic-example:
Build 'null.basic-example' finished after 1 second 32 milliseconds.

==> Wait completed after 1 second 32 milliseconds

==> Builds finished. The artifacts of successful builds are:
--> null.basic-example: Did not export anything. This is the null builder
 Please enter the commit message for your changes. Lines starting
```
This commit is contained in:
Wilken Rivera 2021-02-05 16:35:01 -05:00
parent 540effbbc0
commit ef4d35097b
1 changed files with 11 additions and 3 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

14
packer/plugin.go
View File

@ -121,7 +121,9 @@ func (c *PluginConfig) discoverExternalComponents(path string) error {
}
for pluginName, pluginPath := range pluginPaths {
newPath := pluginPath // this needs to be stored in a new variable for the func below
c.Builders.Set(pluginName, c.Client(newPath).Builder)
c.Builders.Set(pluginName, func() (packersdk.Builder, error) {
return c.Client(newPath).Builder()
})
externallyUsed = append(externallyUsed, pluginName)
}
if len(externallyUsed) > 0 {
@ -136,7 +138,9 @@ func (c *PluginConfig) discoverExternalComponents(path string) error {
}
for pluginName, pluginPath := range pluginPaths {
newPath := pluginPath // this needs to be stored in a new variable for the func below
c.PostProcessors.Set(pluginName, c.Client(newPath).PostProcessor)
c.PostProcessors.Set(pluginName, func() (packersdk.PostProcessor, error) {
return c.Client(newPath).PostProcessor()
})
externallyUsed = append(externallyUsed, pluginName)
}
if len(externallyUsed) > 0 {
@ -151,12 +155,15 @@ func (c *PluginConfig) discoverExternalComponents(path string) error {
}
for pluginName, pluginPath := range pluginPaths {
newPath := pluginPath // this needs to be stored in a new variable for the func below
c.Provisioners.Set(pluginName, c.Client(newPath).Provisioner)
c.Provisioners.Set(pluginName, func() (packersdk.Provisioner, error) {
return c.Client(newPath).Provisioner()
})
externallyUsed = append(externallyUsed, pluginName)
}
if len(externallyUsed) > 0 {
sort.Strings(externallyUsed)
log.Printf("using external provisioners %v", externallyUsed)
externallyUsed = nil
}
pluginPaths, err = c.discoverSingle(filepath.Join(path, "packer-datasource-*"))
@ -171,6 +178,7 @@ func (c *PluginConfig) discoverExternalComponents(path string) error {
if len(externallyUsed) > 0 {
sort.Strings(externallyUsed)
log.Printf("using external datasource %v", externallyUsed)
externallyUsed = nil
}
pluginPaths, err = c.discoverSingle(filepath.Join(path, "packer-plugin-*"))