mirror of
https://github.com/hashicorp/packer.git
synced 2026-10-27 08:28:25 -04:00
Adrien Delorme
0785c2f6fc
This follows #8232 which added the code to generate the code required to parse HCL files for each packer component. All old config files of packer will keep on working the same. Packer takes one argument. When a directory is passed, all files in the folder with a name ending with “.pkr.hcl” or “.pkr.json” will be parsed using the HCL2 format. When a file ending with “.pkr.hcl” or “.pkr.json” is passed it will be parsed using the HCL2 format. For every other case; the old packer style will be used. ## 1. the hcl2template pkg can create a packer.Build from a set of HCL (v2) files I had to make the packer.coreBuild (which is our one and only packer.Build ) a public struct with public fields ## 2. Components interfaces get a new ConfigSpec Method to read a file from an HCL file. This is a breaking change for packer plugins. a packer component can be a: builder/provisioner/post-processor each component interface now gets a `ConfigSpec() hcldec.ObjectSpec` which allows packer to tell what is the layout of the hcl2 config meant to configure that specific component. This ObjectSpec is sent through the wire (RPC) and a cty.Value is now sent through the already existing configuration entrypoints: Provisioner.Prepare(raws ...interface{}) error Builder.Prepare(raws ...interface{}) ([]string, error) PostProcessor.Configure(raws ...interface{}) error close #1768 Example hcl files: ```hcl // file amazon-ebs-kms-key/run.pkr.hcl build { sources = [ "source.amazon-ebs.first", ] provisioner "shell" { inline = [ "sleep 5" ] } post-processor "shell-local" { inline = [ "sleep 5" ] } } // amazon-ebs-kms-key/source.pkr.hcl source "amazon-ebs" "first" { ami_name = "hcl2-test" region = "us-east-1" instance_type = "t2.micro" kms_key_id = "c729958f-c6ba-44cd-ab39-35ab68ce0a6c" encrypt_boot = true source_ami_filter { filters { virtualization-type = "hvm" name = "amzn-ami-hvm-????.??.?.????????-x86_64-gp2" root-device-type = "ebs" } most_recent = true owners = ["amazon"] } launch_block_device_mappings { device_name = "/dev/xvda" volume_size = 20 volume_type = "gp2" delete_on_termination = "true" } launch_block_device_mappings { device_name = "/dev/xvdf" volume_size = 500 volume_type = "gp2" delete_on_termination = true encrypted = true } ami_regions = ["eu-central-1"] run_tags { Name = "packer-solr-something" stack-name = "DevOps Tools" } communicator = "ssh" ssh_pty = true ssh_username = "ec2-user" associate_public_ip_address = true } ```
81 lines
1.9 KiB
Go
81 lines
1.9 KiB
Go
package file
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/*
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The File builder creates an artifact from a file. Because it does not require
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any virtualization or network resources, it's very fast and useful for testing.
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*/
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import (
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"context"
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"fmt"
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"io"
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"io/ioutil"
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"os"
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"github.com/hashicorp/hcl/v2/hcldec"
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"github.com/hashicorp/packer/helper/multistep"
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"github.com/hashicorp/packer/packer"
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)
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const BuilderId = "packer.file"
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type Builder struct {
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config Config
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runner multistep.Runner
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}
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func (b *Builder) ConfigSpec() hcldec.ObjectSpec { return b.config.FlatMapstructure().HCL2Spec() }
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func (b *Builder) Prepare(raws ...interface{}) ([]string, error) {
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warnings, errs := b.config.Prepare(raws...)
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if errs != nil {
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return warnings, errs
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}
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return warnings, nil
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}
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// Run is where the actual build should take place. It takes a Build and a Ui.
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func (b *Builder) Run(ctx context.Context, ui packer.Ui, hook packer.Hook) (packer.Artifact, error) {
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artifact := new(FileArtifact)
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if b.config.Source != "" {
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source, err := os.Open(b.config.Source)
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if err != nil {
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return nil, err
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}
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defer source.Close()
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// Create will truncate an existing file
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target, err := os.Create(b.config.Target)
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if err != nil {
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return nil, err
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}
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defer target.Close()
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ui.Say(fmt.Sprintf("Copying %s to %s", source.Name(), target.Name()))
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bytes, err := io.Copy(target, source)
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if err != nil {
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return nil, err
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}
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ui.Say(fmt.Sprintf("Copied %d bytes", bytes))
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artifact.filename = target.Name()
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} else {
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// We're going to write Contents; if it's empty we'll just create an
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// empty file.
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err := ioutil.WriteFile(b.config.Target, []byte(b.config.Content), 0600)
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if err != nil {
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return nil, err
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}
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artifact.filename = b.config.Target
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}
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if hook != nil {
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if err := hook.Run(ctx, packer.HookProvision, ui, new(packer.MockCommunicator), nil); err != nil {
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return nil, err
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}
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}
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return artifact, nil
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}
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