156 lines
3.3 KiB
Go
156 lines
3.3 KiB
Go
package file
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import (
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"context"
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"fmt"
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"io/ioutil"
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"log"
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"os"
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"time"
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"github.com/hashicorp/terraform/communicator"
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"github.com/hashicorp/terraform/helper/schema"
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"github.com/hashicorp/terraform/terraform"
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"github.com/mitchellh/go-homedir"
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)
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func Provisioner() terraform.ResourceProvisioner {
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return &schema.Provisioner{
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Schema: map[string]*schema.Schema{
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"source": &schema.Schema{
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Type: schema.TypeString,
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Optional: true,
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ConflictsWith: []string{"content"},
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},
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"content": &schema.Schema{
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Type: schema.TypeString,
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Optional: true,
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ConflictsWith: []string{"source"},
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},
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"destination": &schema.Schema{
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Type: schema.TypeString,
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Required: true,
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},
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},
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ApplyFunc: applyFn,
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}
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}
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func applyFn(ctx context.Context) error {
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connState := ctx.Value(schema.ProvRawStateKey).(*terraform.InstanceState)
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data := ctx.Value(schema.ProvConfigDataKey).(*schema.ResourceData)
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// Get a new communicator
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comm, err := communicator.New(connState)
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if err != nil {
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return err
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}
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// Get the source
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src, deleteSource, err := getSrc(data)
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if err != nil {
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return err
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}
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if deleteSource {
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defer os.Remove(src)
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}
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// Begin the file copy
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dst := data.Get("destination").(string)
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resultCh := make(chan error, 1)
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go func() {
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resultCh <- copyFiles(comm, src, dst)
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}()
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// Allow the file copy to complete unless there is an interrupt.
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// If there is an interrupt we make no attempt to cleanly close
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// the connection currently. We just abruptly exit. Because Terraform
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// taints the resource, this is fine.
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select {
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case err := <-resultCh:
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return err
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case <-ctx.Done():
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return fmt.Errorf("file transfer interrupted")
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}
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}
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// getSrc returns the file to use as source
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func getSrc(data *schema.ResourceData) (string, bool, error) {
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src := data.Get("source").(string)
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if content, ok := data.GetOk("content"); ok {
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file, err := ioutil.TempFile("", "tf-file-content")
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if err != nil {
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return "", true, err
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}
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if _, err = file.WriteString(content.(string)); err != nil {
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return "", true, err
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}
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return file.Name(), true, nil
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}
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expansion, err := homedir.Expand(src)
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return expansion, false, err
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}
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// copyFiles is used to copy the files from a source to a destination
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func copyFiles(comm communicator.Communicator, src, dst string) error {
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// Wait and retry until we establish the connection
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err := retryFunc(comm.Timeout(), func() error {
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err := comm.Connect(nil)
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return err
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})
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if err != nil {
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return err
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}
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defer comm.Disconnect()
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info, err := os.Stat(src)
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if err != nil {
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return err
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}
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// If we're uploading a directory, short circuit and do that
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if info.IsDir() {
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if err := comm.UploadDir(dst, src); err != nil {
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return fmt.Errorf("Upload failed: %v", err)
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}
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return nil
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}
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// We're uploading a file...
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f, err := os.Open(src)
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if err != nil {
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return err
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}
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defer f.Close()
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err = comm.Upload(dst, f)
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if err != nil {
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return fmt.Errorf("Upload failed: %v", err)
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}
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return err
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}
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// retryFunc is used to retry a function for a given duration
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func retryFunc(timeout time.Duration, f func() error) error {
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finish := time.After(timeout)
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for {
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err := f()
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if err == nil {
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return nil
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}
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log.Printf("Retryable error: %v", err)
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select {
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case <-finish:
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return err
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case <-time.After(3 * time.Second):
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}
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}
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}
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