Add -print-last-dir and -print-selection flags (gokcehan#1402)

* Add `-print-last-dir` and `-print-selection` flags

* Add shell completions

* Update `lfcd.sh` example to use new flag

client.go

@@ -69,6 +69,16 @@ func run() {
 	if gSelectionPath != "" && len(app.selectionOut) > 0 {
 		writeSelection(gSelectionPath, app.selectionOut)
 	}
+
+	if gPrintLastDir {
+		fmt.Println(app.nav.currDir().path)
+	}
+
+	if gPrintSelection && len(app.selectionOut) > 0 {
+		for _, file := range app.selectionOut {
+			fmt.Println(file)
+		}
+	}
 }
 
 func writeLastDir(filename string, lastDir string) {

etc/lf.bash

@@ -15,6 +15,8 @@ _lf () {
         -last-dir-path
         -log
         -memprofile
+        -print-last-dir
+        -print-selection
         -remote
         -selection-path
         -server

etc/lf.csh

@@ -9,7 +9,7 @@
 #     endif
 #
 
-set LF_ARGS = "-command -config -cpuprofile -doc -last-dir-path -log -memprofile -remote -selection-path -server -single -version -help "
+set LF_ARGS = "-command -config -cpuprofile -doc -last-dir-path -log -memprofile -print-last-dir -print-selection -remote -selection-path -server -single -version -help "
 
 complete lf   "C/-*/(${LF_ARGS})/"
 complete lfcd "C/-*/(${LF_ARGS})/"

etc/lf.fish

@@ -13,6 +13,8 @@ complete -c lf -o doc -d 'show documentation'
 complete -c lf -o last-dir-path -r -d 'path to the file to write the last dir on exit (to use for cd)'
 complete -c lf -o log -r -d 'path to the log file to write messages'
 complete -c lf -o memprofile -r -d 'path to the file to write the memory profile'
+complete -c lf -o print-last-dir -d 'print the last dir to stdout on exit (to use for cd)'
+complete -c lf -o print-selection -d 'print the selected files to stdout on open (to use as open file dialog)'
 complete -c lf -o remote -x -d 'send remote command to server'
 complete -c lf -o selection-path -r -d 'path to the file to write selected files on open (to use as open file dialog)'
 complete -c lf -o server -d 'start server (automatic)'

etc/lf.nu

@@ -1,5 +1,5 @@
 # Autocompletion for nushell.
-# 
+#
 # Documentation: https://www.nushell.sh/book/externs.html
 
 # To enable autocompletion you may put this file into a directory:
@@ -20,6 +20,8 @@ export extern "lf" [
   --last-dir-path: string     # path to the file to write the last dir on exit (to use for cd)
   --log: string               # path to the log file to write messages
   --memprofile: string        # path to the file to write the memory profile
+  --print-last-dir            # print the last dir to stdout on exit (to use for cd)
+  --print-selection           # print the selected files to stdout on open (to use as open file dialog)
   --remote: string            # send remote command to server
   --selection-path: string    # path to the file to write selected files on open (to use as open file dialog)
   --server                    # start server (automatic)

etc/lf.ps1

@@ -16,6 +16,8 @@ Register-ArgumentCompleter -Native -CommandName 'lf' -ScriptBlock {
         [CompletionResult]::new('-last-dir-path ', '-last-dir-path', [CompletionResultType]::ParameterName, 'path to the file to write the last dir on exit (to use for cd)')
         [CompletionResult]::new('-log ', '-log', [CompletionResultType]::ParameterName, 'path to the log file to write messages')
         [CompletionResult]::new('-memprofile ', '-memprofile', [CompletionResultType]::ParameterName, 'path to the file to write the memory profile')
+        [CompletionResult]::new('-print-last-dir', '-print-last-dir', [CompletionResultType]::ParameterName, 'print the last dir to stdout on exit (to use for cd)')
+        [CompletionResult]::new('-print-selection', '-print-selection', [CompletionResultType]::ParameterName, 'print the selected files to stdout on open (to use as open file dialog)')
         [CompletionResult]::new('-remote ', '-remote', [CompletionResultType]::ParameterName, 'send remote command to server')
         [CompletionResult]::new('-selection-path ', '-selection-path', [CompletionResultType]::ParameterName, 'path to the file to write selected files on open (to use as open file dialog)')
         [CompletionResult]::new('-server', '-server', [CompletionResultType]::ParameterName, 'start server (automatic)')

etc/lf.zsh

@@ -20,6 +20,8 @@ arguments=(
     '-last-dir-path[path to the file to write the last dir on exit (to use for cd)]'
     '-log[path to the log file to write messages]'
     '-memprofile[path to the file to write the memory profile]'
+    '-print-last-dir[print the last dir to stdout on exit (to use for cd)]'
+    '-print-selection[print the selected files to stdout on open (to use as open file dialog)]'
     '-remote[send remote command to server]'
     '-selection-path[path to the file to write selected files on open (to use as open file dialog)]'
     '-server[start server (automatic)]'

etc/lfcd.sh

@@ -15,16 +15,6 @@
 #
 
 lfcd () {
-    tmp="$(mktemp)"
     # `command` is needed in case `lfcd` is aliased to `lf`
-    command lf -last-dir-path="$tmp" "$@"
-    if [ -f "$tmp" ]; then
-        dir="$(cat "$tmp")"
-        rm -f "$tmp"
-        if [ -d "$dir" ]; then
-            if [ "$dir" != "$(pwd)" ]; then
-                cd "$dir"
-            fi
-        fi
-    fi
+    cd "$(command lf -print-last-dir "$@")"
 }

eval.go

@@ -1446,7 +1446,7 @@ func (e *callExpr) eval(app *app, args []string) {
 			return
 		}
 
-		if gSelectionPath != "" {
+		if gSelectionPath != "" || gPrintSelection {
 			app.selectionOut, _ = app.nav.currFileOrSelections()
 			app.quitChan <- struct{}{}
 			return

main.go

@@ -22,18 +22,20 @@ var (
 type arrayFlag []string
 
 var (
-	gSingleMode    bool
-	gClientID      int
-	gHostname      string
-	gLastDirPath   string
-	gSelectionPath string
-	gSocketProt    string
-	gSocketPath    string
-	gLogPath       string
-	gSelect        string
-	gConfigPath    string
-	gCommands      arrayFlag
-	gVersion       string
+	gSingleMode     bool
+	gPrintLastDir   bool
+	gPrintSelection bool
+	gClientID       int
+	gHostname       string
+	gLastDirPath    string
+	gSelectionPath  string
+	gSocketProt     string
+	gSocketPath     string
+	gLogPath        string
+	gSelect         string
+	gConfigPath     string
+	gCommands       arrayFlag
+	gVersion        string
 )
 
 func (a *arrayFlag) Set(v string) error {
@@ -228,6 +230,16 @@ func main() {
 		false,
 		"start a client without server")
 
+	printLastDir := flag.Bool(
+		"print-last-dir",
+		false,
+		"print the last dir to stdout on exit (to use for cd)")
+
+	printSelection := flag.Bool(
+		"print-selection",
+		false,
+		"print the selected files to stdout on open (to use as open file dialog)")
+
 	remoteCmd := flag.String(
 		"remote",
 		"",
@@ -305,6 +317,8 @@ func main() {
 		serve()
 	default:
 		gSingleMode = *singleMode
+		gPrintLastDir = *printLastDir
+		gPrintSelection = *printSelection
 
 		if !gSingleMode {
 			checkServer()