74 lines
1.9 KiB
Go
74 lines
1.9 KiB
Go
package common
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import (
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"errors"
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"fmt"
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"strings"
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"github.com/mitchellh/packer/template/interpolate"
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)
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// ISOConfig contains configuration for downloading ISO images.
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type ISOConfig struct {
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ISOChecksum string `mapstructure:"iso_checksum"`
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ISOChecksumType string `mapstructure:"iso_checksum_type"`
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ISOUrls []string `mapstructure:"iso_urls"`
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TargetPath string `mapstructure:"iso_target_path"`
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RawSingleISOUrl string `mapstructure:"iso_url"`
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}
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func (c *ISOConfig) Prepare(ctx *interpolate.Context) ([]string, []error) {
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// Validation
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var errs []error
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var err error
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var warnings []string
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if c.ISOChecksumType == "" {
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errs = append(
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errs, errors.New("The iso_checksum_type must be specified."))
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} else {
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c.ISOChecksumType = strings.ToLower(c.ISOChecksumType)
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if c.ISOChecksumType != "none" {
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if c.ISOChecksum == "" {
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errs = append(
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errs, errors.New("Due to large file sizes, an iso_checksum is required"))
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} else {
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c.ISOChecksum = strings.ToLower(c.ISOChecksum)
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}
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if h := HashForType(c.ISOChecksumType); h == nil {
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errs = append(
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errs,
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fmt.Errorf("Unsupported checksum type: %s", c.ISOChecksumType))
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}
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}
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}
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if c.RawSingleISOUrl == "" && len(c.ISOUrls) == 0 {
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errs = append(
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errs, errors.New("One of iso_url or iso_urls must be specified."))
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} else if c.RawSingleISOUrl != "" && len(c.ISOUrls) > 0 {
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errs = append(
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errs, errors.New("Only one of iso_url or iso_urls may be specified."))
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} else if c.RawSingleISOUrl != "" {
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c.ISOUrls = []string{c.RawSingleISOUrl}
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}
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for i, url := range c.ISOUrls {
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c.ISOUrls[i], err = DownloadableURL(url)
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if err != nil {
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errs = append(
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errs, fmt.Errorf("Failed to parse iso_url %d: %s", i+1, err))
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}
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}
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// Warnings
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if c.ISOChecksumType == "none" {
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warnings = append(warnings,
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"A checksum type of 'none' was specified. Since ISO files are so big,\n"+
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"a checksum is highly recommended.")
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}
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return warnings, errs
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}
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