.gitignore added

[dotfiles/.git] / .config / coc / extensions / coc-go-data / tools / pkg / mod / golang.org / x / tools@v0.1.0 / internal / lsp / cmd / call_hierarchy.go

diff --git a/.config/coc/extensions/coc-go-data/tools/pkg/mod/golang.org/x/tools@v0.1.0/internal/lsp/cmd/call_hierarchy.go b/.config/coc/extensions/coc-go-data/tools/pkg/mod/golang.org/x/tools@v0.1.0/internal/lsp/cmd/call_hierarchy.go
new file mode 100644 (file)
index 0000000..48b4c46
--- /dev/null
+++ b/.config/coc/extensions/coc-go-data/tools/pkg/mod/golang.org/x/tools@v0.1.0/internal/lsp/cmd/call_hierarchy.go
@@ -0,0 +1,147 @@
+// Copyright 2020 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package cmd
+
+import (
+       "context"
+       "flag"
+       "fmt"
+       "strings"
+
+       "golang.org/x/tools/internal/lsp/protocol"
+       "golang.org/x/tools/internal/span"
+       "golang.org/x/tools/internal/tool"
+)
+
+// callHierarchy implements the callHierarchy verb for gopls.
+type callHierarchy struct {
+       app *Application
+}
+
+func (c *callHierarchy) Name() string      { return "call_hierarchy" }
+func (c *callHierarchy) Usage() string     { return "<position>" }
+func (c *callHierarchy) ShortHelp() string { return "display selected identifier's call hierarchy" }
+func (c *callHierarchy) DetailedHelp(f *flag.FlagSet) {
+       fmt.Fprint(f.Output(), `
+Example:
+
+  $ # 1-indexed location (:line:column or :#offset) of the target identifier
+  $ gopls call_hierarchy helper/helper.go:8:6
+  $ gopls call_hierarchy helper/helper.go:#53
+
+  gopls call_hierarchy flags are:
+`)
+       f.PrintDefaults()
+}
+
+func (c *callHierarchy) Run(ctx context.Context, args ...string) error {
+       if len(args) != 1 {
+               return tool.CommandLineErrorf("call_hierarchy expects 1 argument (position)")
+       }
+
+       conn, err := c.app.connect(ctx)
+       if err != nil {
+               return err
+       }
+       defer conn.terminate(ctx)
+
+       from := span.Parse(args[0])
+       file := conn.AddFile(ctx, from.URI())
+       if file.err != nil {
+               return file.err
+       }
+
+       loc, err := file.mapper.Location(from)
+       if err != nil {
+               return err
+       }
+
+       p := protocol.CallHierarchyPrepareParams{
+               TextDocumentPositionParams: protocol.TextDocumentPositionParams{
+                       TextDocument: protocol.TextDocumentIdentifier{URI: loc.URI},
+                       Position:     loc.Range.Start,
+               },
+       }
+
+       callItems, err := conn.PrepareCallHierarchy(ctx, &p)
+       if err != nil {
+               return err
+       }
+       if len(callItems) == 0 {
+               return fmt.Errorf("function declaration identifier not found at %v", args[0])
+       }
+
+       for _, item := range callItems {
+               incomingCalls, err := conn.IncomingCalls(ctx, &protocol.CallHierarchyIncomingCallsParams{Item: item})
+               if err != nil {
+                       return err
+               }
+               for i, call := range incomingCalls {
+                       // From the spec: CallHierarchyIncomingCall.FromRanges is relative to
+                       // the caller denoted by CallHierarchyIncomingCall.from.
+                       printString, err := callItemPrintString(ctx, conn, call.From, call.From.URI, call.FromRanges)
+                       if err != nil {
+                               return err
+                       }
+                       fmt.Printf("caller[%d]: %s\n", i, printString)
+               }
+
+               printString, err := callItemPrintString(ctx, conn, item, "", nil)
+               if err != nil {
+                       return err
+               }
+               fmt.Printf("identifier: %s\n", printString)
+
+               outgoingCalls, err := conn.OutgoingCalls(ctx, &protocol.CallHierarchyOutgoingCallsParams{Item: item})
+               if err != nil {
+                       return err
+               }
+               for i, call := range outgoingCalls {
+                       // From the spec: CallHierarchyOutgoingCall.FromRanges is the range
+                       // relative to the caller, e.g the item passed to
+                       printString, err := callItemPrintString(ctx, conn, call.To, item.URI, call.FromRanges)
+                       if err != nil {
+                               return err
+                       }
+                       fmt.Printf("callee[%d]: %s\n", i, printString)
+               }
+       }
+
+       return nil
+}
+
+// callItemPrintString returns a protocol.CallHierarchyItem object represented as a string.
+// item and call ranges (protocol.Range) are converted to user friendly spans (1-indexed).
+func callItemPrintString(ctx context.Context, conn *connection, item protocol.CallHierarchyItem, callsURI protocol.DocumentURI, calls []protocol.Range) (string, error) {
+       itemFile := conn.AddFile(ctx, item.URI.SpanURI())
+       if itemFile.err != nil {
+               return "", itemFile.err
+       }
+       itemSpan, err := itemFile.mapper.Span(protocol.Location{URI: item.URI, Range: item.Range})
+       if err != nil {
+               return "", err
+       }
+
+       callsFile := conn.AddFile(ctx, callsURI.SpanURI())
+       if callsURI != "" && callsFile.err != nil {
+               return "", callsFile.err
+       }
+       var callRanges []string
+       for _, rng := range calls {
+               callSpan, err := callsFile.mapper.Span(protocol.Location{URI: item.URI, Range: rng})
+               if err != nil {
+                       return "", err
+               }
+
+               spn := fmt.Sprint(callSpan)
+               callRanges = append(callRanges, fmt.Sprint(spn[strings.Index(spn, ":")+1:]))
+       }
+
+       printString := fmt.Sprintf("function %s in %v", item.Name, itemSpan)
+       if len(calls) > 0 {
+               printString = fmt.Sprintf("ranges %s in %s from/to %s", strings.Join(callRanges, ", "), callsURI.SpanURI().Filename(), printString)
+       }
+       return printString, nil
+}