cmd/viewcore: migrate from chzyer/readline to ergochat/readline

Module ergochat/readline is a fork that is actively maintained and
includes numerous bug fixes that are not present in the original module.
Additionally, this change reduces the number of indirect dependencies by
removing the need for github.com/chzyer/logex and
github.com/chzyer/test.

Details:
- Updated imports and removed old module dependencies.
- Replaced Terminal field references with Stdout method calls for shell
output.
- Modified the cmdToCompleter function to adapt to the new
PrefixCompleter structure.
- Ensured the completion tree is built using the new SetChildren and
Children methods.

Signed-off-by: Mikel Olasagasti Uranga <[email protected]>

cmd/viewcore/main.go

@@ -24,7 +24,7 @@ import (
 	"sync"
 	"text/tabwriter"
 
-	"github.com/chzyer/readline"
+	"github.com/ergochat/readline"
 	"github.com/spf13/cobra"
 	"github.com/spf13/pflag"
 	"golang.org/x/debug/internal/core"
@@ -340,11 +340,11 @@ func runRoot(cmd *cobra.Command, args []string) {
 	defer shell.Close()
 
 	// nice welcome message.
-	fmt.Fprintln(shell.Terminal)
+	fmt.Fprintln(shell.Stdout())
 	if args := p.Args(); args != "" {
-		fmt.Fprintf(shell.Terminal, "Core %q was generated by %q\n", cfg.corefile, args)
+		fmt.Fprintf(shell.Stdout(), "Core %q was generated by %q\n", cfg.corefile, args)
 	}
-	fmt.Fprintf(shell.Terminal, "Entering interactive mode (type 'help' for commands)\n")
+	fmt.Fprintf(shell.Stdout(), "Entering interactive mode (type 'help' for commands)\n")
 
 	for {
 		l, err := shell.Readline()
@@ -377,9 +377,9 @@ func capturePanic(fn func()) (err error) {
 	return nil
 }
 
-func cmdToCompleter(parent readline.PrefixCompleterInterface, c *cobra.Command) {
+func cmdToCompleter(parent *readline.PrefixCompleter, c *cobra.Command) {
 	completer := readline.PcItem(c.Name())
-	parent.SetChildren(append(parent.GetChildren(), completer))
+	parent.SetChildren(append(parent.Children, completer))
 	for _, child := range c.Commands() {
 		cmdToCompleter(completer, child)
 	}

go.mod

@@ -3,14 +3,13 @@ module golang.org/x/debug
 go 1.18
 
 require (
-	github.com/chzyer/readline v0.0.0-20180603132655-2972be24d48e
+	github.com/ergochat/readline v0.1.2
 	github.com/spf13/cobra v0.0.3
 	github.com/spf13/pflag v1.0.3
 	golang.org/x/sys v0.25.0
 )
 
 require (
-	github.com/chzyer/logex v1.1.10 // indirect
-	github.com/chzyer/test v0.0.0-20180213035817-a1ea475d72b1 // indirect
 	github.com/inconshreveable/mousetrap v1.0.0 // indirect
+	golang.org/x/text v0.9.0 // indirect
 )

go.sum

@@ -1,9 +1,5 @@
-github.com/chzyer/logex v1.1.10 h1:Swpa1K6QvQznwJRcfTfQJmTE72DqScAa40E+fbHEXEE=
-github.com/chzyer/logex v1.1.10/go.mod h1:+Ywpsq7O8HXn0nuIou7OrIPyXbp3wmkHB+jjWRnGsAI=
-github.com/chzyer/readline v0.0.0-20180603132655-2972be24d48e h1:fY5BOSpyZCqRo5OhCuC+XN+r/bBCmeuuJtjz+bCNIf8=
-github.com/chzyer/readline v0.0.0-20180603132655-2972be24d48e/go.mod h1:nSuG5e5PlCu98SY8svDHJxuZscDgtXS6KTTbou5AhLI=
-github.com/chzyer/test v0.0.0-20180213035817-a1ea475d72b1 h1:q763qf9huN11kDQavWsoZXJNW3xEE4JJyHa5Q25/sd8=
-github.com/chzyer/test v0.0.0-20180213035817-a1ea475d72b1/go.mod h1:Q3SI9o4m/ZMnBNeIyt5eFwwo7qiLfzFZmjNmxjkiQlU=
+github.com/ergochat/readline v0.1.2 h1:zxiwQB8DyTLD0HSWthJlnvs5E2X1qnyXZ44RFf1jRlg=
+github.com/ergochat/readline v0.1.2/go.mod h1:o3ux9QLHLm77bq7hDB21UTm6HlV2++IPDMfIfKDuOgY=
 github.com/inconshreveable/mousetrap v1.0.0 h1:Z8tu5sraLXCXIcARxBp/8cbvlwVa7Z1NHg9XEKhtSvM=
 github.com/inconshreveable/mousetrap v1.0.0/go.mod h1:PxqpIevigyE2G7u3NXJIT2ANytuPF1OarO4DADm73n8=
 github.com/spf13/cobra v0.0.3 h1:ZlrZ4XsMRm04Fr5pSFxBgfND2EBVa1nLpiy1stUsX/8=
@@ -12,3 +8,5 @@ github.com/spf13/pflag v1.0.3 h1:zPAT6CGy6wXeQ7NtTnaTerfKOsV6V6F8agHXFiazDkg=
 github.com/spf13/pflag v1.0.3/go.mod h1:DYY7MBk1bdzusC3SYhjObp+wFpr4gzcvqqNjLnInEg4=
 golang.org/x/sys v0.25.0 h1:r+8e+loiHxRqhXVl6ML1nO3l1+oFoWbnlu2Ehimmi34=
 golang.org/x/sys v0.25.0/go.mod h1:/VUhepiaJMQUp4+oa/7Zr1D23ma6VTLIYjOOTFZPUcA=
+golang.org/x/text v0.9.0 h1:2sjJmO8cDvYveuX97RDLsxlyUxLl+GHoLxBiRdHllBE=
+golang.org/x/text v0.9.0/go.mod h1:e1OnstbJyHTd6l/uOt8jFFHp6TRDWZR/bV3emEE/zU8=