whatcanGOwrong

go/pkg/mod/github.com/go-delve/delve@v1.23.0/service/dap/command.go

@@ -0,0 +1,169 @@
+package dap
+
+import (
+	"bytes"
+	"errors"
+	"fmt"
+	"sort"
+	"strings"
+
+	"github.com/go-delve/delve/pkg/config"
+	"github.com/google/go-dap"
+)
+
+func (s *Session) delveCmd(goid, frame int, cmdstr string) (string, error) {
+	vals := strings.SplitN(strings.TrimSpace(cmdstr), " ", 2)
+	cmdname := vals[0]
+	var args string
+	if len(vals) > 1 {
+		args = strings.TrimSpace(vals[1])
+	}
+	for _, cmd := range debugCommands(s) {
+		for _, alias := range cmd.aliases {
+			if alias == cmdname {
+				return cmd.cmdFn(goid, frame, args)
+			}
+		}
+	}
+	return "", errNoCmd
+}
+
+type cmdfunc func(goid, frame int, args string) (string, error)
+
+type command struct {
+	aliases []string
+	helpMsg string
+	cmdFn   cmdfunc
+}
+
+const (
+	msgHelp = `Prints the help message.
+	
+dlv help [command]
+
+Type "help" followed by the name of a command for more information about it.`
+
+	msgConfig = `Changes configuration parameters.
+	
+	dlv config -list
+	
+		Show all configuration parameters.
+
+	dlv config -list <parameter>
+	
+		Show value of a configuration parameter.
+	
+	dlv config <parameter> <value>
+	
+		Changes the value of a configuration parameter.
+	
+	dlv config substitutePath <from> <to>
+	dlv config substitutePath <from>
+	dlv config substitutePath -clear
+	
+		Adds or removes a path substitution rule. If -clear is used all substitutePath rules are removed.
+		See also Documentation/cli/substitutepath.md.
+
+	dlv config showPprofLabels <label>
+	dlv config showPprofLabels -clear <label>
+	dlv config showPprofLabels -clear
+
+		Adds or removes a label key to show in the callstack view. If -clear is used without an argument,
+		all labels are removed.`
+	msgSources = `Print list of source files.
+
+	dlv sources [<regex>]
+
+If regex is specified only the source files matching it will be returned.`
+)
+
+// debugCommands returns a list of commands with default commands defined.
+func debugCommands(s *Session) []command {
+	return []command{
+		{aliases: []string{"help", "h"}, cmdFn: s.helpMessage, helpMsg: msgHelp},
+		{aliases: []string{"config"}, cmdFn: s.evaluateConfig, helpMsg: msgConfig},
+		{aliases: []string{"sources", "s"}, cmdFn: s.sources, helpMsg: msgSources},
+	}
+}
+
+var errNoCmd = errors.New("command not available")
+
+func (s *Session) helpMessage(_, _ int, args string) (string, error) {
+	var buf bytes.Buffer
+	if args != "" {
+		for _, cmd := range debugCommands(s) {
+			for _, alias := range cmd.aliases {
+				if alias == args {
+					return cmd.helpMsg, nil
+				}
+			}
+		}
+		return "", errNoCmd
+	}
+
+	fmt.Fprintln(&buf, "The following commands are available:")
+
+	for _, cmd := range debugCommands(s) {
+		h := cmd.helpMsg
+		if idx := strings.Index(h, "\n"); idx >= 0 {
+			h = h[:idx]
+		}
+		if len(cmd.aliases) > 1 {
+			fmt.Fprintf(&buf, "    dlv %s (alias: %s) \t %s\n", cmd.aliases[0], strings.Join(cmd.aliases[1:], " | "), h)
+		} else {
+			fmt.Fprintf(&buf, "    dlv %s \t %s\n", cmd.aliases[0], h)
+		}
+	}
+
+	fmt.Fprintln(&buf)
+	fmt.Fprintln(&buf, "Type 'dlv help' followed by a command for full documentation.")
+	return buf.String(), nil
+}
+
+func (s *Session) evaluateConfig(_, _ int, expr string) (string, error) {
+	argv := config.Split2PartsBySpace(expr)
+	name := argv[0]
+	if name == "-list" {
+		if len(argv) > 1 {
+			return config.ConfigureListByName(&s.args, argv[1], "cfgName"), nil
+		}
+		return listConfig(&s.args), nil
+	}
+	updated, res, err := configureSet(&s.args, expr)
+	if err != nil {
+		return "", err
+	}
+
+	if updated {
+		// Send invalidated events for areas that are affected by configuration changes.
+		switch name {
+		case "showGlobalVariables", "showRegisters":
+			// Variable data has become invalidated.
+			s.send(&dap.InvalidatedEvent{
+				Event: *newEvent("invalidated"),
+				Body: dap.InvalidatedEventBody{
+					Areas: []dap.InvalidatedAreas{"variables"},
+				},
+			})
+		case "goroutineFilters", "hideSystemGoroutines", "showPprofLabels":
+			// Thread related data has become invalidated.
+			s.send(&dap.InvalidatedEvent{
+				Event: *newEvent("invalidated"),
+				Body: dap.InvalidatedEventBody{
+					Areas: []dap.InvalidatedAreas{"threads"},
+				},
+			})
+		}
+		res += "\nUpdated"
+	}
+	return res, nil
+}
+
+func (s *Session) sources(_, _ int, filter string) (string, error) {
+	sources, err := s.debugger.Sources(filter)
+	if err != nil {
+		return "", err
+	}
+	sort.Strings(sources)
+	return strings.Join(sources, "\n"), nil
+}