136 lines
3.3 KiB
Go
136 lines
3.3 KiB
Go
package command
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import (
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"fmt"
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"sort"
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"github.com/hashicorp/terraform/moduledeps"
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"github.com/hashicorp/terraform/terraform"
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"github.com/xlab/treeprint"
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)
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// ProvidersCommand is a Command implementation that prints out information
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// about the providers used in the current configuration/state.
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type ProvidersCommand struct {
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Meta
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}
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func (c *ProvidersCommand) Help() string {
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return providersCommandHelp
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}
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func (c *ProvidersCommand) Synopsis() string {
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return "Prints a tree of the providers used in the configuration"
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}
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func (c *ProvidersCommand) Run(args []string) int {
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c.Meta.process(args, false)
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cmdFlags := c.Meta.flagSet("providers")
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cmdFlags.Usage = func() { c.Ui.Error(c.Help()) }
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if err := cmdFlags.Parse(args); err != nil {
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return 1
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}
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configPath, err := ModulePath(cmdFlags.Args())
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if err != nil {
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c.Ui.Error(err.Error())
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return 1
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}
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// Load the config
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root, err := c.Module(configPath)
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if err != nil {
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c.Ui.Error(fmt.Sprintf("Failed to load root config module: %s", err))
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return 1
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}
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if root == nil {
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c.Ui.Error(fmt.Sprintf(
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"No configuration files found in the directory: %s\n\n"+
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"This command requires configuration to run.",
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configPath))
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return 1
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}
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// Validate the config (to ensure the version constraints are valid)
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err = root.Validate()
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if err != nil {
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c.Ui.Error(err.Error())
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return 1
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}
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// Load the backend
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b, err := c.Backend(&BackendOpts{
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Config: root.Config(),
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})
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if err != nil {
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c.Ui.Error(fmt.Sprintf("Failed to load backend: %s", err))
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return 1
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}
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// Get the state
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env := c.Workspace()
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state, err := b.State(env)
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if err != nil {
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c.Ui.Error(fmt.Sprintf("Failed to load state: %s", err))
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return 1
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}
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if err := state.RefreshState(); err != nil {
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c.Ui.Error(fmt.Sprintf("Failed to load state: %s", err))
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return 1
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}
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s := state.State()
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depTree := terraform.ModuleTreeDependencies(root, s)
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depTree.SortDescendents()
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printRoot := treeprint.New()
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providersCommandPopulateTreeNode(printRoot, depTree)
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c.Ui.Output(printRoot.String())
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return 0
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}
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func providersCommandPopulateTreeNode(node treeprint.Tree, deps *moduledeps.Module) {
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names := make([]string, 0, len(deps.Providers))
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for name := range deps.Providers {
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names = append(names, string(name))
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}
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sort.Strings(names)
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for _, name := range names {
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dep := deps.Providers[moduledeps.ProviderInstance(name)]
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versionsStr := dep.Constraints.String()
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if versionsStr != "" {
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versionsStr = " " + versionsStr
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}
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var reasonStr string
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switch dep.Reason {
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case moduledeps.ProviderDependencyInherited:
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reasonStr = " (inherited)"
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case moduledeps.ProviderDependencyFromState:
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reasonStr = " (from state)"
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}
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node.AddNode(fmt.Sprintf("provider.%s%s%s", name, versionsStr, reasonStr))
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}
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for _, child := range deps.Children {
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childNode := node.AddBranch(fmt.Sprintf("module.%s", child.Name))
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providersCommandPopulateTreeNode(childNode, child)
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}
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}
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const providersCommandHelp = `
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Usage: terraform providers [dir]
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Prints out a tree of modules in the referenced configuration annotated with
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their provider requirements.
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This provides an overview of all of the provider requirements across all
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referenced modules, as an aid to understanding why particular provider
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plugins are needed and why particular versions are selected.
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`
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