can auto create ~/.local/share/bash file

bash.go

@@ -5,39 +5,65 @@ package fhelp
 import (
 	"fmt"
 	"os"
+	"path/filepath"
+
+	"go.wit.com/lib/gui/shell"
 )
 
 // makes a bash autocomplete file for your command
-func DoBash(ARGNAME string) {
-	fmt.Println("# add this in your bashrc:")
-	fmt.Println("")
-	fmt.Println("# todo: add this to go-arg as a 'hidden' go-arg option --bash")
-	fmt.Println("#")
-	fmt.Println("# todo: can this output work/parse with:")
-	fmt.Println("# complete -C `" + ARGNAME + " --bash` " + ARGNAME)
-	fmt.Println("")
-	fmt.Println("_" + ARGNAME + "_complete()")
-	fmt.Println("{")
-	fmt.Println("	# sets local to this func vars")
-	fmt.Println("	local cur prev all")
-	fmt.Println("	cur=${COMP_WORDS[COMP_CWORD]}")
-	fmt.Println("	prev=${COMP_WORDS[COMP_CWORD-1]}")
-	fmt.Println("	all=${COMP_WORDS[@]}")
-	fmt.Println("")
-	fmt.Println("	# this is where we generate the go-arg output")
-	fmt.Println("        GOARGS=$(" + ARGNAME + " --auto-complete $prev \\'$cur\\' $all)")
-	fmt.Println("")
-	fmt.Println("	# this compares the command line input from the user")
-	fmt.Println("	# to whatever strings we output")
-	fmt.Println("        COMPREPLY=( $(compgen -W \"$GOARGS\" -- $cur) )  # THIS WORKS")
-	fmt.Println("	return 0")
-	fmt.Println("}")
-	fmt.Println("complete -F _" + ARGNAME + "_complete " + ARGNAME)
-	fmt.Println("")
-	fmt.Println("# copy and paste the above into your bash shell should work")
+func DoBash(argname string) {
+	if homeDir, err := os.UserHomeDir(); err == nil {
+		filename := filepath.Join(homeDir, ".local/share/bash-completion/completions", argname)
+		if shell.Exists(filename) {
+		} else {
+			if f, err := os.OpenFile(filename, os.O_APPEND|os.O_CREATE|os.O_WRONLY, 0644); err == nil {
+				f.Write([]byte(MakeBashCompletionText(argname)))
+				f.Close()
+			}
+			fmt.Println("bash file created:", filename)
+		}
+	}
+
+	fmt.Println(MakeBashCompletionText(argname))
+
+	fmt.Println("restart bash")
 	os.Exit(0)
 }
 
+func MakeBashCompletionText(argname string) string {
+	var out string
+
+	out += fmt.Sprintf("# add this in your bashrc:\n")
+	out += fmt.Sprintf("\n")
+	out += fmt.Sprintf("# todo: add this to go-arg as a 'hidden' go-arg option --bash\n")
+	out += fmt.Sprintf("#\n")
+	out += fmt.Sprintf("# Put the below in the file: ~/.local/share/bash-completion/completions/%s\n", argname)
+	out += fmt.Sprintf("#\n")
+	out += fmt.Sprintf("# todo: make this output work/parse with:\n")
+	out += fmt.Sprintf("# complete -C %s --bash go\n", argname)
+	out += fmt.Sprintf("\n")
+	out += fmt.Sprintf("_%s_complete()\n", argname)
+	out += fmt.Sprintf("{\n")
+	out += fmt.Sprintf("	# sets local to this func vars\n")
+	out += fmt.Sprintf("	local cur prev all\n")
+	out += fmt.Sprintf("	cur=${COMP_WORDS[COMP_CWORD]}\n")
+	out += fmt.Sprintf("	prev=${COMP_WORDS[COMP_CWORD-1]}\n")
+	out += fmt.Sprintf("	all=${COMP_WORDS[@]}\n")
+	out += fmt.Sprintf("\n")
+	out += fmt.Sprintf("	# this is where we generate the go-arg output\n")
+	out += fmt.Sprintf("        GOARGS=$(%s --auto-complete $prev \\'$cur\\' $all)\n", argname)
+	out += fmt.Sprintf("\n")
+	out += fmt.Sprintf("	# this compares the command line input from the user\n")
+	out += fmt.Sprintf("	# to whatever strings we output\n")
+	out += fmt.Sprintf("        COMPREPLY=( $(compgen -W \"$GOARGS\" -- $cur) )  # THIS WORKS\n")
+	out += fmt.Sprintf("	return 0\n")
+	out += fmt.Sprintf("}\n")
+	out += fmt.Sprintf("complete -F _%s_complete %s\n", argname, argname)
+	out += fmt.Sprintf("\n")
+	out += fmt.Sprintf("# copy and paste the above into your bash shell should work\n")
+	return out
+}
+
 /*
 // prints help to STDERR // TODO: move everything below this to go-args
 func (args) doBashHelp() {