From e646b3d29d6daad3c5c1391866b1bd5f4acd5fb2 Mon Sep 17 00:00:00 2001
From: Ben Soares <b.soares@dundee.ac.uk>
Date: Fri, 19 May 2023 17:16:15 +0100
Subject: [PATCH] JAL-4187 JAL-629 JAL-3830 Fix ArgParser to check for empty
 string argument.  Fixed jalview.bin.Jalview to not like one
 empty argument.  Fixed Powershell to not send a single
 empty argument

---
 src/jalview/bin/ArgsParser.java |    2 +-
 src/jalview/bin/Jalview.java    |    5 ++++-
 utils/getdown/bin/jalview.ps1   |    8 ++++++--
 3 files changed, 11 insertions(+), 4 deletions(-)

diff --git a/src/jalview/bin/ArgsParser.java b/src/jalview/bin/ArgsParser.java
index c927f1f..ab33542 100644
--- a/src/jalview/bin/ArgsParser.java
+++ b/src/jalview/bin/ArgsParser.java
@@ -42,7 +42,7 @@ public class ArgsParser
     for (int i = 0; i < args.length; i++)
     {
       String arg = args[i].trim();
-      if (arg.charAt(0) == '-')
+      if (arg.length() > 0 && arg.charAt(0) == '-')
       {
         arg = arg.substring(1);
       }
diff --git a/src/jalview/bin/Jalview.java b/src/jalview/bin/Jalview.java
index fb31189..59382fd 100755
--- a/src/jalview/bin/Jalview.java
+++ b/src/jalview/bin/Jalview.java
@@ -302,8 +302,11 @@ public class Jalview
       System.setSecurityManager(null);
     }
 
-    if (args == null)
+    if (args == null || args.length == 0 || (args.length == 1
+            && (args[0] == null || args[0].length() == 0)))
+    {
       args = new String[] {};
+    }
 
     // get args needed before proper ArgParser
     bootstrapArgs = BootstrapArgs.getBootstrapArgs(args);
diff --git a/utils/getdown/bin/jalview.ps1 b/utils/getdown/bin/jalview.ps1
index a5c0354..65998bc 100755
--- a/utils/getdown/bin/jalview.ps1
+++ b/utils/getdown/bin/jalview.ps1
@@ -79,6 +79,10 @@ $CLASSPATH = ( Select-String -Path "${GETDOWNTXT}" -AllMatches -Pattern "code\s*
 $CONSOLEWIDTH = $Host.UI.RawUI.WindowSize.Width
 
 # quote the args and the command (in case of spaces) with escape chars (`) and precede with & to indicate command not string
-$myArgsString = '"' + $($myArgs -join '" "') + '"'
-Invoke-Expression -Command "& `"${JAVA}`" `"-DCONSOLEWIDTH=${CONSOLEWIDTH}`" -cp `"${CLASSPATH}`" jalview.bin.Launcher ${myArgsString}"
+if ( $myArgs.count -eq 0 ) {
+  Invoke-Expression -Command "& `"${JAVA}`" `"-DCONSOLEWIDTH=${CONSOLEWIDTH}`" -cp `"${CLASSPATH}`" jalview.bin.Launcher"
+} else {
+  $myArgsString = '"' + $($myArgs -join '" "') + '"'
+  Invoke-Expression -Command "& `"${JAVA}`" `"-DCONSOLEWIDTH=${CONSOLEWIDTH}`" -cp `"${CLASSPATH}`" jalview.bin.Launcher ${myArgsString}"
+}
 
-- 
1.7.10.2