completion: Prompt picking type of provider/data/resource automatically

commands/completion_command.go

@@ -127,7 +127,7 @@ func (c *CompletionCommand) Run(args []string) int {
 	}
 
 	cc := &lsp.ClientCapabilities{}
-	items := ilsp.CompletionList(candidates, cc.TextDocument)
+	items := ilsp.ToCompletionList(candidates, cc.TextDocument)
 
 	c.Ui.Output(fmt.Sprintf("%#v", items))
 	return 0

go.mod

@@ -10,7 +10,7 @@ require (
 	github.com/google/go-cmp v0.5.1
 	github.com/hashicorp/go-multierror v1.1.0
 	github.com/hashicorp/go-version v1.2.1
-	github.com/hashicorp/hcl-lang v0.0.0-20201113080530-b0668b270b47
+	github.com/hashicorp/hcl-lang v0.0.0-20201116081236-948e43712a65
 	github.com/hashicorp/hcl/v2 v2.6.0
 	github.com/hashicorp/terraform-exec v0.11.1-0.20201007122305-ea2094d52cb5
 	github.com/hashicorp/terraform-json v0.6.0

go.sum

@@ -183,8 +183,8 @@ github.com/hashicorp/hcl v1.0.0 h1:0Anlzjpi4vEasTeNFn2mLJgTSwt0+6sfsiTG8qcWGx4=
 github.com/hashicorp/hcl v1.0.0/go.mod h1:E5yfLk+7swimpb2L/Alb/PJmXilQ/rhwaUYs4T20WEQ=
 github.com/hashicorp/hcl-lang v0.0.0-20201110071249-4e412924f52b h1:EjnMRaTQlomBMNRQfyWoLEg9IdqxeN1R2mb3ZZetCBs=
 github.com/hashicorp/hcl-lang v0.0.0-20201110071249-4e412924f52b/go.mod h1:vd3BPEDWrYMAgAnB0MRlBdZknrpUXf8Jk2PNaHIbwhg=
-github.com/hashicorp/hcl-lang v0.0.0-20201113080530-b0668b270b47 h1:n3STOLqEwfs4QWgzV0cjg4sZDSKVM4IwK38ZDVa+ljM=
-github.com/hashicorp/hcl-lang v0.0.0-20201113080530-b0668b270b47/go.mod h1:vd3BPEDWrYMAgAnB0MRlBdZknrpUXf8Jk2PNaHIbwhg=
+github.com/hashicorp/hcl-lang v0.0.0-20201116081236-948e43712a65 h1:kF6Dxt2kPNj8+Px7LyK7nxPDQjYKwGrKxxYnSu+LOXM=
+github.com/hashicorp/hcl-lang v0.0.0-20201116081236-948e43712a65/go.mod h1:vd3BPEDWrYMAgAnB0MRlBdZknrpUXf8Jk2PNaHIbwhg=
 github.com/hashicorp/hcl/v2 v2.0.0/go.mod h1:oVVDG71tEinNGYCxinCYadcmKU9bglqW9pV3txagJ90=
 github.com/hashicorp/hcl/v2 v2.6.0 h1:3krZOfGY6SziUXa6H9PJU6TyohHn7I+ARYnhbeNBz+o=
 github.com/hashicorp/hcl/v2 v2.6.0/go.mod h1:bQTN5mpo+jewjJgh8jr0JUguIi7qPHUF6yIfAEN3jqY=

internal/lsp/completion.go

@@ -6,9 +6,19 @@ import (
 	lsp "github.com/sourcegraph/go-lsp"
 )
 
-func CompletionList(candidates lang.Candidates, caps lsp.TextDocumentClientCapabilities) lsp.CompletionList {
-	list := lsp.CompletionList{
-		Items:        make([]lsp.CompletionItem, len(candidates.List)),
+type CompletionList struct {
+	IsIncomplete bool             `json:"isIncomplete"`
+	Items        []CompletionItem `json:"items"`
+}
+
+type CompletionItem struct {
+	lsp.CompletionItem
+	Command *lsp.Command `json:"command,omitempty"`
+}
+
+func ToCompletionList(candidates lang.Candidates, caps lsp.TextDocumentClientCapabilities) CompletionList {
+	list := CompletionList{
+		Items:        make([]CompletionItem, len(candidates.List)),
 		IsIncomplete: !candidates.IsComplete,
 	}
 
@@ -21,13 +31,13 @@ func CompletionList(candidates lang.Candidates, caps lsp.TextDocumentClientCapab
 	}
 
 	for i, c := range candidates.List {
-		list.Items[i] = CompletionItem(c, snippetSupport, markdown)
+		list.Items[i] = toCompletionItem(c, snippetSupport, markdown)
 	}
 
 	return list
 }
 
-func CompletionItem(candidate lang.Candidate, snippet, markdown bool) lsp.CompletionItem {
+func toCompletionItem(candidate lang.Candidate, snippet, markdown bool) CompletionItem {
 	doc := candidate.Description.Value
 
 	// TODO: revisit once go-lsp supports markdown in CompletionItem
@@ -44,14 +54,24 @@ func CompletionItem(candidate lang.Candidate, snippet, markdown bool) lsp.Comple
 	}
 
 	te, format := textEdit(candidate.TextEdit, snippet)
+	var cmd *lsp.Command
+	if candidate.TriggerSuggest {
+		cmd = &lsp.Command{
+			Command: "editor.action.triggerSuggest",
+			Title:   "Suggest",
+		}
+	}
 
-	return lsp.CompletionItem{
-		Label:            candidate.Label,
-		Kind:             kind,
-		InsertTextFormat: format,
-		Detail:           candidate.Detail,
-		Documentation:    doc,
-		TextEdit:         te,
+	return CompletionItem{
+		CompletionItem: lsp.CompletionItem{
+			Label:            candidate.Label,
+			Kind:             kind,
+			InsertTextFormat: format,
+			Detail:           candidate.Detail,
+			Documentation:    doc,
+			TextEdit:         te,
+		},
+		Command: cmd,
 	}
 }
 

langserver/handlers/complete.go

@@ -8,8 +8,8 @@ import (
 	lsp "github.com/sourcegraph/go-lsp"
 )
 
-func (h *logHandler) TextDocumentComplete(ctx context.Context, params lsp.CompletionParams) (lsp.CompletionList, error) {
-	var list lsp.CompletionList
+func (h *logHandler) TextDocumentComplete(ctx context.Context, params lsp.CompletionParams) (ilsp.CompletionList, error) {
+	var list ilsp.CompletionList
 
 	fs, err := lsctx.DocumentStorage(ctx)
 	if err != nil {
@@ -54,5 +54,5 @@ func (h *logHandler) TextDocumentComplete(ctx context.Context, params lsp.Comple
 	h.logger.Printf("Looking for candidates at %q -> %#v", file.Filename(), fPos.Position())
 	candidates, err := d.CandidatesAtPos(file.Filename(), fPos.Position())
 	h.logger.Printf("received candidates: %#v", candidates)
-	return ilsp.CompletionList(candidates, cc.TextDocument), err
+	return ilsp.ToCompletionList(candidates, cc.TextDocument), err
 }