Automatically use the way the binary is invoked to generate autocompletion script

Author: tucksaun

Diff for: binary.go

@@ -43,8 +43,28 @@ func CurrentBinaryPath() (string, error) {
 	return argv0, nil
 }
 
+func CurrentBinaryInvocation() (string, error) {
+	if len(os.Args) == 0 || os.Args[0] == "" {
+		return "", errors.New("no binary invokation found")
+	}
+
+	return os.Args[0], nil
+}
+
 func (c *Context) CurrentBinaryPath() string {
-	path, _ := CurrentBinaryPath()
+	path, err := CurrentBinaryPath()
+	if err != nil {
+		panic(err)
+	}
 
 	return path
 }
+
+func (c *Context) CurrentBinaryInvocation() string {
+	invocation, err := CurrentBinaryInvocation()
+	if err != nil {
+		panic(err)
+	}
+
+	return invocation
+}

Diff for: resources/completion.bash

@@ -28,7 +28,7 @@
 # versions are used)
 _{{ .App.HelpName }}_console() {
   # shellcheck disable=SC2068
-  {{ .CurrentBinaryPath }} console $@
+  {{ .CurrentBinaryInvocation }} console $@
 }
 
 _complete_{{ .App.HelpName }}() {

Diff for: resources/completion.fish

@@ -27,14 +27,14 @@ function __complete_{{ .App.HelpName }}
     set -lx COMP_LINE (commandline -cp)
     test -z (commandline -ct)
     and set COMP_LINE "$COMP_LINE "
-    {{ .CurrentBinaryPath }} self:autocomplete
+    {{ .CurrentBinaryInvocation }} self:autocomplete
 end
 
 # this wrapper function allows us to call Symfony autocompletion letting it
 # knows how to call the `bin/console` using the Symfony CLI binary (to ensure
 # the right env and PHP versions are used)
 function __complete_{{ .App.HelpName }}_console
-    set -x _SF_CMD "{{ .CurrentBinaryPath }}" "console"
+    set -x _SF_CMD "{{ .CurrentBinaryInvocation }}" "console"
     _sf_console
 end
 

Diff for: resources/completion.zsh

@@ -31,7 +31,7 @@
 # versions are used)
 _{{ .App.HelpName }}_console() {
   # shellcheck disable=SC2068
-  {{ .CurrentBinaryPath }} console $@
+  {{ .CurrentBinaryInvocation }} console $@
 }
 
 _complete_{{ .App.HelpName }}() {