improve bridge discovery: fix bash bugs, expand builtins

pkg/actions/bridge/aws.go

@@ -22,8 +22,8 @@ func ActionAws(command ...string) carapace.Action {
 					return carapace.ActionValues()
 				}
 				for index, line := range lines {
-					if strings.HasSuffix(line, " ") {
-						lines[index] = strings.TrimSuffix(line, " ") // v1 has space suffix
+					if before, ok := strings.CutSuffix(line, " "); ok {
+						lines[index] = before // v1 has space suffix
 					}
 				}
 				a := carapace.ActionValues(lines[:len(lines)-1]...)

pkg/bridges/bash.go

@@ -43,26 +43,14 @@ func Bash() []string {
 
 // bashCompletionLocations return folders containing bash completion scripts
 //
-//	https://github.com/scop/bash-completion/blob/7864377cacb7858893a475e69c9c7461c2727e02/bash_completion#L3159C5-L3194C61
+//	https://github.com/scop/bash-completion/blob/main/bash_completion (function _comp_load)
 func bashCompletionLocations() []string {
-	locations := []string{
-		// TODO fix order
-		"/data/data/com.termux/files/etc/bash_completion.d", // termux
-		"/etc/bash_completion.d",                            // linux
-		"/usr/local/etc/bash_completion.d",                  // osx
-	}
+	var locations []string
 
-	// # Lookup order:
-	// # 1) From BASH_COMPLETION_USER_DIR (e.g. ~/.local/share/bash-completion):
-	// # User installed completions.
-	// if [[ ${BASH_COMPLETION_USER_DIR-} ]]; then
-	//     _comp_split -F : paths "$BASH_COMPLETION_USER_DIR" &&
-	//         dirs+=("${paths[@]/%//completions}")
-	// else
-	//     dirs=("${XDG_DATA_HOME:-$HOME/.local/share}/bash-completion/completions")
-	// fi
+	// 1) From BASH_COMPLETION_USER_DIR or XDG_DATA_HOME:
+	// User installed completions are looked up first.
 	if userDirs, ok := os.LookupEnv("BASH_COMPLETION_USER_DIR"); ok {
-		for userDir := range strings.Split(userDirs, string(os.PathListSeparator)) {
+		for userDir := range strings.SplitSeq(userDirs, string(os.PathListSeparator)) {
 			locations = append(locations, fmt.Sprintf("%v/completions", userDir))
 		}
 	} else {
@@ -73,42 +61,21 @@ func bashCompletionLocations() []string {
 		}
 	}
 
-	// # 2) From the location of bash_completion: Completions relative to the main
-	// # script. This is primarily for run-in-place-from-git-clone setups, where
-	// # we want to prefer in-tree completions over ones possibly coming with a
-	// # system installed bash-completion. (Due to usual install layouts, this
-	// # often hits the correct completions in system installations, too.)
-	// if [[ $BASH_SOURCE == */* ]]; then
-	//     dirs+=("${BASH_SOURCE%/*}/completions")
-	// else
-	//     dirs+=(./completions)
-	// fi
+	// 2) From the location of bash_completion (completions relative to the main script).
+	// In system installations this often hits the right directory.
 	if sourceDir, ok := os.LookupEnv("BASH_SOURCE"); ok {
 		locations = append(locations, fmt.Sprintf("%v/completions", sourceDir))
-	} else {
-		locations = append(locations, "./completions")
 	}
 
-	// # 3) From bin directories extracted from the specified path to the command,
-	// # the real path to the command, and $PATH
-	// paths=()
-	// [[ $cmd == /* ]] && paths+=("${cmd%/*}")
-	// _comp_realcommand "$cmd" && paths+=("${REPLY%/*}")
-	// _comp_split -aF : paths "$PATH"
-	// for dir in "${paths[@]%/}"; do
-	//     [[ $dir == ?*/@(bin|sbin) ]] &&
-	//         dirs+=("${dir%/*}/share/bash-completion/completions")
-	// done
-	for _, pathDir := range strings.Split(os.Getenv("PATH"), string(os.PathListSeparator)) {
+	// 3) From bin directories extracted from $PATH.
+	// For each PATH entry ending in bin or sbin, look at ../share/bash-completion/completions.
+	for pathDir := range strings.SplitSeq(os.Getenv("PATH"), string(os.PathListSeparator)) {
 		locations = append(locations, fmt.Sprintf("%v/share/bash-completion/completions", pathDir))
 	}
 
-	// # 4) From XDG_DATA_DIRS or system dirs (e.g. /usr/share, /usr/local/share):
-	// # Completions in the system data dirs.
-	// _comp_split -F : paths "${XDG_DATA_DIRS:-/usr/local/share:/usr/share}" &&
-	//     dirs+=("${paths[@]/%//bash-completion/completions}")
+	// 4) From XDG_DATA_DIRS or system data dirs.
 	if dataDirs, ok := os.LookupEnv("XDG_DATA_DIRS"); ok {
-		for _, dataDir := range strings.Split(dataDirs, string(os.PathListSeparator)) {
+		for dataDir := range strings.SplitSeq(dataDirs, string(os.PathListSeparator)) {
 			locations = append(locations, fmt.Sprintf("%v/bash-completion/completions", dataDir))
 		}
 	} else {
@@ -119,5 +86,12 @@ func bashCompletionLocations() []string {
 		)
 	}
 
+	// 5) Legacy/fallback locations (pre-XDG system dirs).
+	locations = append(locations,
+		"/data/data/com.termux/files/etc/bash_completion.d", // termux
+		"/etc/bash_completion.d",                            // linux
+		"/usr/local/etc/bash_completion.d",                  // osx
+	)
+
 	return locations
 }

pkg/bridges/bash_builtins.go

@@ -1,56 +1,81 @@
 package bridges
 
+// compgen -b; compgen -k
 var bashBuiltins = []string{
+	"!",
 	".",
 	":",
 	"[",
+	"[[",
+	"]]",
+	"{",
+	"}",
 	"alias",
 	"bg",
 	"bind",
 	"break",
 	"builtin",
+	"caller",
 	"case",
 	"cd",
 	"command",
 	"compgen",
 	"complete",
+	"compopt",
 	"continue",
+	"coproc",
 	"declare",
 	"dirs",
 	"disown",
+	"do",
+	"done",
 	"echo",
+	"elif",
+	"else",
 	"enable",
+	"esac",
 	"eval",
 	"exec",
 	"exit",
 	"export",
+	"false",
 	"fc",
 	"fg",
+	"fi",
+	"for",
+	"function",
 	"getopts",
 	"hash",
 	"help",
 	"history",
 	"if",
+	"in",
 	"jobs",
 	"kill",
 	"let",
 	"local",
 	"logout",
+	"mapfile",
 	"popd",
 	"printf",
 	"pushd",
 	"pwd",
 	"read",
+	"readarray",
 	"readonly",
 	"return",
+	"select",
 	"set",
 	"shift",
 	"shopt",
 	"source",
 	"suspend",
 	"test",
+	"then",
+	"time",
 	"times",
 	"trap",
+	"true",
 	"type",
 	"typeset",
 	"ulimit",