terraform/command/get.go

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package command
import (
"flag"
"fmt"
"strings"
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"github.com/hashicorp/terraform/config/module"
)
// GetCommand is a Command implementation that takes a Terraform
// configuration and downloads all the modules.
type GetCommand struct {
Meta
}
func (c *GetCommand) Run(args []string) int {
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var update bool
args, err := c.Meta.process(args, false)
if err != nil {
return 1
}
cmdFlags := flag.NewFlagSet("get", flag.ContinueOnError)
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cmdFlags.BoolVar(&update, "update", false, "update")
cmdFlags.Usage = func() { c.Ui.Error(c.Help()) }
if err := cmdFlags.Parse(args); err != nil {
return 1
}
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path, err := ModulePath(cmdFlags.Args())
if err != nil {
c.Ui.Error(err.Error())
return 1
}
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mode := module.GetModeGet
if update {
mode = module.GetModeUpdate
}
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if err := getModules(&c.Meta, path, mode); err != nil {
c.Ui.Error(err.Error())
return 1
}
return 0
}
func (c *GetCommand) Help() string {
helpText := `
Usage: terraform get [options] PATH
Downloads and installs modules needed for the configuration given by
PATH.
This recursively downloads all modules needed, such as modules
imported by modules imported by the root and so on. If a module is
already downloaded, it will not be redownloaded or checked for updates
unless the -update flag is specified.
Options:
-update=false If true, modules already downloaded will be checked
for updates and updated if necessary.
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-no-color If specified, output won't contain any color.
`
return strings.TrimSpace(helpText)
}
func (c *GetCommand) Synopsis() string {
return "Download and install modules for the configuration"
}
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func getModules(m *Meta, path string, mode module.GetMode) error {
mod, err := module.NewTreeModule("", path)
if err != nil {
return fmt.Errorf("Error loading configuration: %s", err)
}
err = mod.Load(m.moduleStorage(m.DataDir(), mode))
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if err != nil {
return fmt.Errorf("Error loading modules: %s", err)
}
return nil
}