terraform/builtin/provisioners/file/resource_provisioner.go

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package file
import (
"context"
"fmt"
"io/ioutil"
"os"
"github.com/hashicorp/terraform/communicator"
"github.com/hashicorp/terraform/helper/schema"
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"github.com/hashicorp/terraform/terraform"
"github.com/mitchellh/go-homedir"
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)
func Provisioner() terraform.ResourceProvisioner {
return &schema.Provisioner{
Schema: map[string]*schema.Schema{
"source": &schema.Schema{
Type: schema.TypeString,
Optional: true,
ConflictsWith: []string{"content"},
},
"content": &schema.Schema{
Type: schema.TypeString,
Optional: true,
ConflictsWith: []string{"source"},
},
"destination": &schema.Schema{
Type: schema.TypeString,
Required: true,
},
},
ApplyFunc: applyFn,
ValidateFunc: validateFn,
}
}
func applyFn(ctx context.Context) error {
connState := ctx.Value(schema.ProvRawStateKey).(*terraform.InstanceState)
data := ctx.Value(schema.ProvConfigDataKey).(*schema.ResourceData)
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// Get a new communicator
comm, err := communicator.New(connState)
if err != nil {
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return err
}
ctx, cancel := context.WithTimeout(ctx, comm.Timeout())
defer cancel()
// Get the source
src, deleteSource, err := getSrc(data)
if err != nil {
return err
}
if deleteSource {
defer os.Remove(src)
}
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// Begin the file copy
dst := data.Get("destination").(string)
if err := copyFiles(ctx, comm, src, dst); err != nil {
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return err
}
return nil
}
func validateFn(c *terraform.ResourceConfig) (ws []string, es []error) {
if !c.IsSet("source") && !c.IsSet("content") {
es = append(es, fmt.Errorf("Must provide one of 'source' or 'content'"))
}
return ws, es
}
// getSrc returns the file to use as source
func getSrc(data *schema.ResourceData) (string, bool, error) {
src := data.Get("source").(string)
if content, ok := data.GetOk("content"); ok {
file, err := ioutil.TempFile("", "tf-file-content")
if err != nil {
return "", true, err
}
if _, err = file.WriteString(content.(string)); err != nil {
return "", true, err
}
return file.Name(), true, nil
}
expansion, err := homedir.Expand(src)
return expansion, false, err
}
// copyFiles is used to copy the files from a source to a destination
func copyFiles(ctx context.Context, comm communicator.Communicator, src, dst string) error {
// Wait and retry until we establish the connection
err := communicator.Retry(ctx, func() error {
err := comm.Connect(nil)
return err
})
if err != nil {
return err
}
defer comm.Disconnect()
info, err := os.Stat(src)
if err != nil {
return err
}
// If we're uploading a directory, short circuit and do that
if info.IsDir() {
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if err := comm.UploadDir(dst, src); err != nil {
return fmt.Errorf("Upload failed: %v", err)
}
return nil
}
// We're uploading a file...
f, err := os.Open(src)
if err != nil {
return err
}
defer f.Close()
err = comm.Upload(dst, f)
if err != nil {
return fmt.Errorf("Upload failed: %v", err)
}
return err
}