From 0c1ac54b34ca612edf58204cd1743cdd5f71b9aa Mon Sep 17 00:00:00 2001
From: Ben Soares <b.soares@dundee.ac.uk>
Date: Fri, 2 Aug 2024 17:49:18 +0100
Subject: [PATCH] JAL-3631 made Readlink-f work in powershell.  Need to test
 once more in Windows\!

---
 utils/getdown/bin/jalview.ps1 |   37 +++++++++++++------------------------
 utils/getdown/bin/update.ps1  |   41 +++++++++++++++--------------------------
 2 files changed, 28 insertions(+), 50 deletions(-)

diff --git a/utils/getdown/bin/jalview.ps1 b/utils/getdown/bin/jalview.ps1
index 382b22e..3445aad 100755
--- a/utils/getdown/bin/jalview.ps1
+++ b/utils/getdown/bin/jalview.ps1
@@ -50,32 +50,21 @@ if ( $help ) {
 # parent dir of this actual script (which should be the getdown appdir/bin). Follow all symlinks.  Like GNU readlink -f
 function Readlink-f {
   Param($Link)
-  $Return = $null
-  $c = 0
-  $max = 100 # just in case we end up in a loop
-  [bool] $found = 0
-  $file = Get-Item -Path $Link
-  $prevfile = $null
-  While ( $c -lt $max -and "${file}" -ne "${prevfile}" -and -not $found ) {
-    $prevfile = $file
-    [string] $target = ( $file ).Target
-    If ( $target -eq $null -or ( $file ).LinkType -ne "SymbolicLink" ) {
-      $Return = $file
-      $found = 1
-    } Else {
-      If ( $( Split-Path -Path $target -IsAbsolute ) ) {
-        $file = Get-Item -Path $target
-      } Else {
-        # symbolic link is relative: combine previous link parent dir with the link target and resolve
-        $file = Get-Item -Path ( Join-Path -Path ( Split-Path -Path $prevfile -Parent ) -ChildPath $target -Resolve )
-      }
-    }
-    $c++
+  $dirs = @()
+  $dir = Convert-Path $Link
+  while ( $dir ) {
+    $dirs = @( Split-Path $dir -Leaf ) + $dirs
+    $dir = Split-Path $dir -Parent
   }
-  if ( -not $found ) {
-    throw "Could not determine path to actual file $( Split-Path -Path $Link -Leaf )"
+  $real = Get-Item "/"
+  foreach ($d in $dirs) {
+    $real = Join-Path -Path $real -ChildPath $d
+    $item = Get-Item $real
+    if ($item.Target -ne $null) {
+      $real = Convert-Path $item.Target
+    }
   }
-  $Return
+  $real
 }
 
 # Avert problem with unix version of powershell and tell user the reason (Windows must always have .ps1 extension)
diff --git a/utils/getdown/bin/update.ps1 b/utils/getdown/bin/update.ps1
index 22b7405..4928573 100644
--- a/utils/getdown/bin/update.ps1
+++ b/utils/getdown/bin/update.ps1
@@ -47,32 +47,21 @@ if ( -not ( $userspace -or -$installation ) ) {
 # parent dir of this actual script (which should be the getdown appdir/bin). Follow all symlinks.  Like GNU readlink -f
 function Readlink-f {
   Param($Link)
-  $Return = $null
-  $c = 0
-  $max = 100 # just in case we end up in a loop
-  [bool] $found = 0
-  $file = Get-Item -Path $Link
-  $prevfile = $null
-  While ( $c -lt $max -and "${file}" -ne "${prevfile}" -and -not $found ) {
-    $prevfile = $file
-    [string] $target = ( $file ).Target
-    If ( $target -eq $null -or ( $file ).LinkType -ne "SymbolicLink" ) {
-      $Return = $file
-      $found = 1
-    } Else {
-      If ( $( Split-Path -Path $target -IsAbsolute ) ) {
-        $file = Get-Item -Path $target
-      } Else {
-        # symbolic link is relative: combine previous link parent dir with the link target and resolve
-        $file = Get-Item -Path ( Join-Path -Path ( Split-Path -Path $prevfile -Parent ) -ChildPath $target -Resolve )
-      }
-    }
-    $c++
+  $dirs = @()
+  $dir = Convert-Path $Link
+  while ( $dir ) {
+    $dirs = @( Split-Path $dir -Leaf ) + $dirs
+    $dir = Split-Path $dir -Parent
   }
-  if ( -not $found ) {
-    throw "Could not determine path to actual file $( Split-Path -Path $Link -Leaf )"
+  $real = Get-Item "/"
+  foreach ($d in $dirs) {
+    $real = Join-Path -Path $real -ChildPath $d
+    $item = Get-Item $real
+    if ($item.Target -ne $null) {
+      $real = Convert-Path $item.Target
+    }
   }
-  $Return
+  $real
 }
 
 # Avert problem with unix version of powershell and tell user the reason (Windows must always have .ps1 extension)
@@ -189,8 +178,8 @@ if ( -not ( Test-Path -Path $JAVA ) ) {
 }
 
 # we should always have at least one JVMARGS and GDL_ARGS so this is okay
-$myJvmArgsString = '`"' + $($JVMARGS -join '`" `"') + '`"'
-$myGdlArgsString = '`"' + $($GDL_ARGS -join '`" `"') + '`"'
+$myJvmArgsString = '"' + $($JVMARGS -join '" "') + '"'
+$myGdlArgsString = '"' + $($GDL_ARGS -join '" "') + '"'
 
 # quote the args and the command (in case of spaces) with escape chars (`) and precede with & to indicate a command not string
 $COMMAND = "& `"${JAVA}`" ${myJvmArgsString} -cp `"${GDL_CLASSPATH}`" com.threerings.getdown.launcher.GetdownApp ${myGdlArgsString}"
-- 
1.7.10.2