command/providers: Show provider requirements tree

Providers can be required from multiple sources. The previous
implementation of the providers sub-command displayed only a flat list
of provider requirements, which made it difficult to see which modules
required each provider.

This commit reintroduces the tree display of provider requirements, and
adds a separate output block for providers required by existing state.
This commit is contained in:
Alisdair McDiarmid 2020-06-09 13:32:56 -04:00
parent 299aa31b43
commit 1c1e4a4de0
6 changed files with 137 additions and 32 deletions

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@ -94,23 +94,32 @@ func (c *ProvidersCommand) Run(args []string) int {
return 1 return 1
} }
reqs, reqDiags := config.ProviderRequirements() reqs, reqDiags := config.ProviderRequirementsByModule()
if reqDiags.HasErrors() { diags = diags.Append(reqDiags)
c.showDiagnostics(configDiags) if diags.HasErrors() {
c.showDiagnostics(diags)
return 1 return 1
} }
state := s.State() state := s.State()
var stateReqs getproviders.Requirements
if state != nil { if state != nil {
stateReqs := state.ProviderRequirements() stateReqs = state.ProviderRequirements()
reqs = reqs.Merge(stateReqs)
} }
printRoot := treeprint.New() printRoot := treeprint.New()
providersCommandPopulateTreeNode(printRoot, reqs) c.populateTreeNode(printRoot, reqs)
c.Ui.Output("\nProviders required by configuration:")
c.Ui.Output(printRoot.String()) c.Ui.Output(printRoot.String())
if len(stateReqs) > 0 {
c.Ui.Output("Providers required by state:\n")
for fqn := range stateReqs {
c.Ui.Output(fmt.Sprintf(" provider[%s]\n", fqn.String()))
}
}
c.showDiagnostics(diags) c.showDiagnostics(diags)
if diags.HasErrors() { if diags.HasErrors() {
return 1 return 1
@ -118,22 +127,27 @@ func (c *ProvidersCommand) Run(args []string) int {
return 0 return 0
} }
func providersCommandPopulateTreeNode(node treeprint.Tree, deps getproviders.Requirements) { func (c *ProvidersCommand) populateTreeNode(tree treeprint.Tree, node *configs.ModuleRequirements) {
for fqn, dep := range deps { for fqn, dep := range node.Requirements {
versionsStr := getproviders.VersionConstraintsString(dep) versionsStr := getproviders.VersionConstraintsString(dep)
if versionsStr != "" { if versionsStr != "" {
versionsStr = " " + versionsStr versionsStr = " " + versionsStr
} }
node.AddNode(fmt.Sprintf("provider[%s]%s", fqn.String(), versionsStr)) tree.AddNode(fmt.Sprintf("provider[%s]%s", fqn.String(), versionsStr))
}
for name, childNode := range node.Children {
branch := tree.AddBranch(fmt.Sprintf("module.%s", name))
c.populateTreeNode(branch, childNode)
} }
} }
const providersCommandHelp = ` const providersCommandHelp = `
Usage: terraform providers [dir] Usage: terraform providers [dir]
Prints out a list of providers required by the configuration and state. Prints out a tree of modules in the referenced configuration annotated with
their provider requirements.
This provides an overview of all of the provider requirements as an aid to This provides an overview of all of the provider requirements across all
understanding why particular provider plugins are needed and why particular referenced modules, as an aid to understanding why particular provider
versions are selected. plugins are needed and why particular versions are selected.
` `

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@ -5,6 +5,7 @@ import (
"strings" "strings"
"testing" "testing"
"github.com/hashicorp/terraform/helper/copy"
"github.com/mitchellh/cli" "github.com/mitchellh/cli"
) )
@ -75,14 +76,10 @@ func TestProviders_noConfigs(t *testing.T) {
} }
func TestProviders_modules(t *testing.T) { func TestProviders_modules(t *testing.T) {
cwd, err := os.Getwd() td := tempDir(t)
if err != nil { copy.CopyDir(testFixturePath("providers/modules"), td)
t.Fatalf("err: %s", err) defer os.RemoveAll(td)
} defer testChdir(t, td)()
if err := os.Chdir(testFixturePath("providers/modules")); err != nil {
t.Fatalf("err: %s", err)
}
defer os.Chdir(cwd)
// first run init with mock provider sources to install the module // first run init with mock provider sources to install the module
initUi := new(cli.MockUi) initUi := new(cli.MockUi)
@ -120,6 +117,7 @@ func TestProviders_modules(t *testing.T) {
wantOutput := []string{ wantOutput := []string{
"provider[registry.terraform.io/hashicorp/foo] 1.0.*", // from required_providers "provider[registry.terraform.io/hashicorp/foo] 1.0.*", // from required_providers
"provider[registry.terraform.io/hashicorp/bar] 2.0.0", // from provider config "provider[registry.terraform.io/hashicorp/bar] 2.0.0", // from provider config
"── module.kiddo", // tree node for child module
"provider[registry.terraform.io/hashicorp/baz]", // implied by a resource in the child module "provider[registry.terraform.io/hashicorp/baz]", // implied by a resource in the child module
} }
@ -156,6 +154,7 @@ func TestProviders_state(t *testing.T) {
wantOutput := []string{ wantOutput := []string{
"provider[registry.terraform.io/hashicorp/foo] 1.0.*", // from required_providers "provider[registry.terraform.io/hashicorp/foo] 1.0.*", // from required_providers
"provider[registry.terraform.io/hashicorp/bar] 2.0.0", // from a provider config block "provider[registry.terraform.io/hashicorp/bar] 2.0.0", // from a provider config block
"Providers required by state", // header for state providers
"provider[registry.terraform.io/hashicorp/baz]", // from a resouce in state (only) "provider[registry.terraform.io/hashicorp/baz]", // from a resouce in state (only)
} }

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@ -10,6 +10,6 @@ provider "bar" {
version = "2.0.0" version = "2.0.0"
} }
module "child" { module "kiddo" {
source = "./child" source = "./child"
} }

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@ -77,6 +77,15 @@ type Config struct {
Version *version.Version Version *version.Version
} }
// ModuleRequirements represents the provider requirements for an individual
// module, along with references to any child modules. This is used to
// determine which modules require which providers.
type ModuleRequirements struct {
Module *Module
Requirements getproviders.Requirements
Children map[string]*ModuleRequirements
}
// NewEmptyConfig constructs a single-node configuration tree with an empty // NewEmptyConfig constructs a single-node configuration tree with an empty
// root module. This is generally a pretty useless thing to do, so most callers // root module. This is generally a pretty useless thing to do, so most callers
// should instead use BuildConfig. // should instead use BuildConfig.
@ -175,12 +184,45 @@ func (c *Config) DescendentForInstance(path addrs.ModuleInstance) *Config {
func (c *Config) ProviderRequirements() (getproviders.Requirements, hcl.Diagnostics) { func (c *Config) ProviderRequirements() (getproviders.Requirements, hcl.Diagnostics) {
reqs := make(getproviders.Requirements) reqs := make(getproviders.Requirements)
diags := c.addProviderRequirements(reqs) diags := c.addProviderRequirements(reqs)
for _, childConfig := range c.Children {
moreDiags := childConfig.addProviderRequirements(reqs)
diags = append(diags, moreDiags...)
}
return reqs, diags return reqs, diags
} }
// ProviderRequirementsByModule searches the full tree of modules under the
// receiver for both explicit and implicit dependencies on providers,
// constructing a tree where the requirements are broken out by module.
//
// If the returned diagnostics includes errors then the resulting Requirements
// may be incomplete.
func (c *Config) ProviderRequirementsByModule() (*ModuleRequirements, hcl.Diagnostics) {
reqs := make(getproviders.Requirements)
diags := c.addProviderRequirements(reqs)
children := make(map[string]*ModuleRequirements)
for name, child := range c.Children {
childReqs, childDiags := child.ProviderRequirementsByModule()
children[name] = childReqs
diags = append(diags, childDiags...)
}
ret := &ModuleRequirements{
Module: c.Module,
Requirements: reqs,
Children: children,
}
return ret, diags
}
// addProviderRequirements is the main part of the ProviderRequirements // addProviderRequirements is the main part of the ProviderRequirements
// implementation, gradually mutating a shared requirements object to // implementation, gradually mutating a shared requirements object to
// eventually return. // eventually return. This function only adds requirements for the top-level
// module.
func (c *Config) addProviderRequirements(reqs getproviders.Requirements) hcl.Diagnostics { func (c *Config) addProviderRequirements(reqs getproviders.Requirements) hcl.Diagnostics {
var diags hcl.Diagnostics var diags hcl.Diagnostics
@ -235,13 +277,6 @@ func (c *Config) addProviderRequirements(reqs getproviders.Requirements) hcl.Dia
} }
} }
// ...and now we'll recursively visit all of the child modules to merge
// in their requirements too.
for _, childConfig := range c.Children {
moreDiags := childConfig.addProviderRequirements(reqs)
diags = append(diags, moreDiags...)
}
return diags return diags
} }

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@ -5,7 +5,11 @@ import (
"github.com/go-test/deep" "github.com/go-test/deep"
"github.com/google/go-cmp/cmp" "github.com/google/go-cmp/cmp"
"github.com/google/go-cmp/cmp/cmpopts"
"github.com/zclconf/go-cty/cty"
version "github.com/hashicorp/go-version"
"github.com/hashicorp/hcl/v2/hclsyntax"
svchost "github.com/hashicorp/terraform-svchost" svchost "github.com/hashicorp/terraform-svchost"
"github.com/hashicorp/terraform/addrs" "github.com/hashicorp/terraform/addrs"
"github.com/hashicorp/terraform/internal/getproviders" "github.com/hashicorp/terraform/internal/getproviders"
@ -145,6 +149,59 @@ func TestConfigProviderRequirements(t *testing.T) {
} }
} }
func TestConfigProviderRequirementsByModule(t *testing.T) {
cfg, diags := testNestedModuleConfigFromDir(t, "testdata/provider-reqs")
assertNoDiagnostics(t, diags)
tlsProvider := addrs.NewProvider(
addrs.DefaultRegistryHost,
"hashicorp", "tls",
)
happycloudProvider := addrs.NewProvider(
svchost.Hostname("tf.example.com"),
"awesomecorp", "happycloud",
)
nullProvider := addrs.NewDefaultProvider("null")
randomProvider := addrs.NewDefaultProvider("random")
impliedProvider := addrs.NewDefaultProvider("implied")
terraformProvider := addrs.NewBuiltInProvider("terraform")
configuredProvider := addrs.NewDefaultProvider("configured")
got, diags := cfg.ProviderRequirementsByModule()
assertNoDiagnostics(t, diags)
child, ok := cfg.Children["kinder"]
if !ok {
t.Fatalf(`could not find child config "kinder" in config children`)
}
want := &ModuleRequirements{
Module: cfg.Module,
Requirements: getproviders.Requirements{
// Only the root module's version is present here
nullProvider: getproviders.MustParseVersionConstraints("~> 2.0.0"),
randomProvider: getproviders.MustParseVersionConstraints("~> 1.2.0"),
tlsProvider: getproviders.MustParseVersionConstraints("~> 3.0"),
configuredProvider: getproviders.MustParseVersionConstraints("~> 1.4"),
impliedProvider: nil,
terraformProvider: nil,
},
Children: map[string]*ModuleRequirements{
"kinder": {
Module: child.Module,
Requirements: getproviders.Requirements{
nullProvider: getproviders.MustParseVersionConstraints("= 2.0.1"),
happycloudProvider: nil,
},
Children: map[string]*ModuleRequirements{},
},
},
}
ignore := cmpopts.IgnoreUnexported(version.Constraint{}, cty.Value{}, hclsyntax.Body{})
if diff := cmp.Diff(want, got, ignore); diff != "" {
t.Errorf("wrong result\n%s", diff)
}
}
func TestConfigProviderForConfigAddr(t *testing.T) { func TestConfigProviderForConfigAddr(t *testing.T) {
cfg, diags := testModuleConfigFromDir("testdata/valid-modules/providers-fqns") cfg, diags := testModuleConfigFromDir("testdata/valid-modules/providers-fqns")
assertNoDiagnostics(t, diags) assertNoDiagnostics(t, diags)

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@ -16,7 +16,7 @@ terraform {
resource "implied_foo" "bar" { resource "implied_foo" "bar" {
} }
module "child" { module "kinder" {
source = "./child" source = "./child"
} }