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provides native functions for go-jsonnet.
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,40 @@ | ||
| package tfstate | ||
|
|
||
| import ( | ||
| "context" | ||
| "fmt" | ||
|
|
||
| "github.com/google/go-jsonnet" | ||
| "github.com/google/go-jsonnet/ast" | ||
| ) | ||
|
|
||
| // JsonnetNativeFuncs provides the native functions for go-jsonnet. | ||
| func JsonnetNativeFuncs(ctx context.Context, prefix, stateLoc string) ([]*jsonnet.NativeFunction, error) { | ||
| state, err := ReadURL(ctx, stateLoc) | ||
| if err != nil { | ||
| return nil, fmt.Errorf("failed to read tfstate: %s %w", stateLoc, err) | ||
| } | ||
| return []*jsonnet.NativeFunction{ | ||
| { | ||
| Name: prefix + "tfstate", | ||
| Params: []ast.Identifier{"address"}, | ||
| Func: func(args []interface{}) (interface{}, error) { | ||
| if len(args) != 1 { | ||
| return nil, fmt.Errorf("tfstate expects 1 argument") | ||
| } | ||
| addr, ok := args[0].(string) | ||
| if !ok { | ||
| return nil, fmt.Errorf("tfstate expects string argument") | ||
| } | ||
| attrs, err := state.Lookup(addr) | ||
| if err != nil { | ||
| return nil, fmt.Errorf("failed to lookup %s in tfstate: %w", addr, err) | ||
| } | ||
| if attrs.Value == nil { | ||
| return nil, fmt.Errorf("%s is not found in tfstate", addr) | ||
| } | ||
| return attrs.Value, nil | ||
| }, | ||
| }, | ||
| }, nil | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,56 @@ | ||
| package tfstate_test | ||
|
|
||
| import ( | ||
| "bytes" | ||
| "context" | ||
| "encoding/json" | ||
| "testing" | ||
|
|
||
| "github.com/fujiwara/tfstate-lookup/tfstate" | ||
| "github.com/google/go-cmp/cmp" | ||
| "github.com/google/go-jsonnet" | ||
| ) | ||
|
|
||
| func TestJsonnetNativeFunc(t *testing.T) { | ||
| ctx := context.Background() | ||
| funcs, err := tfstate.JsonnetNativeFuncs(ctx, "myfunc_", "./test/terraform.tfstate") | ||
| if err != nil { | ||
| t.Fatal(err) | ||
| } | ||
| vm := jsonnet.MakeVM() | ||
| for _, fn := range funcs { | ||
| vm.NativeFunction(fn) | ||
| } | ||
| out, err := vm.EvaluateAnonymousSnippet("test.jsonnet", ` | ||
| local tfstate = std.native("myfunc_tfstate"); | ||
| { | ||
| arn: tfstate("aws_acm_certificate.main.arn"), // string | ||
| subject_alternative_names: tfstate("aws_acm_certificate.main.subject_alternative_names"), // array | ||
| subject_alternative_names_0: tfstate("aws_acm_certificate.main.subject_alternative_names[0]"), // string | ||
| tags: tfstate("aws_acm_certificate.main.tags"), // object | ||
| tags_env: tfstate("aws_acm_certificate.main.tags").env, // string | ||
| }`+"\n") | ||
| if err != nil { | ||
| t.Fatal(err) | ||
| } | ||
| ob := new(bytes.Buffer) | ||
| if err := json.Indent(ob, []byte(out), "", " "); err != nil { | ||
| t.Fatal(err) | ||
| } | ||
| eb := new(bytes.Buffer) | ||
| expect := `{ | ||
| "arn": "arn:aws:acm:ap-northeast-1:123456789012:certificate/4986a36e-7027-4265-864b-1fe32f96d774", | ||
| "subject_alternative_names": ["*.example.com"], | ||
| "subject_alternative_names_0": "*.example.com", | ||
| "tags": { | ||
| "env": "world" | ||
| }, | ||
| "tags_env": "world" | ||
| }` + "\n" | ||
| if err := json.Indent(eb, []byte(expect), "", " "); err != nil { | ||
| t.Fatal(err) | ||
| } | ||
| if diff := cmp.Diff(ob.String(), eb.String()); diff != "" { | ||
| t.Errorf("unexpected output: %s", diff) | ||
| } | ||
| } |