comparison vext.ps1 @ 1733:d6d7c74c7eb7

Merge from branch "vext"

+<#
+
+.SYNOPSIS
+A simple manager for third-party source code dependencies.
+Run "vext help" for more documentation.
+
+#>
+
+$sml = $env:VEXT_SML
+
+$mydir = Split-Path $MyInvocation.MyCommand.Path -Parent
+$program = "$mydir/vext.sml"
+
+# We need either Poly/ML or SML/NJ. No great preference as to which.
+
+if (!$sml) {
+    if (Get-Command "polyml" -ErrorAction SilentlyContinue) {
+       $sml = "poly"
+    } elseif (Get-Command "sml" -ErrorAction SilentlyContinue) {
+       $sml = "smlnj"
+    } else {
+       echo @"
+
+ERROR: No supported SML compiler or interpreter found       
+
+  The Vext external source code manager needs a Standard ML (SML)
+  compiler or interpreter to run.
+
+  Please ensure you have one of the following SML implementations
+  installed and present in your PATH, and try again.
+
+    1. Poly/ML
+       - executable name: polyml
+
+    2. Standard ML of New Jersey
+       - executable name: sml
+
+"@
+       exit 1
+    }
+}
+
+if ($args -match "[^a-z]") {
+    $arglist = '["usage"]'
+} else {
+    $arglist = '["' + ($args -join '","') + '"]'
+}
+
+if ($sml -eq "poly") {
+
+    $program = $program -replace "\\","\\\\"
+    echo "use ""$program""; vext $arglist" | polyml -q --error-exit | Out-Host
+
+} elseif ($sml -eq "smlnj") {
+
+    $lines = @(Get-Content $program)
+    $lines = $lines -notmatch "val _ = main ()"
+
+    $intro = @"
+val smlrun__cp = 
+    let val x = !Control.Print.out in
+        Control.Print.out := { say = fn _ => (), flush = fn () => () };
+        x
+    end;
+val smlrun__prev = ref "";
+Control.Print.out := { 
+    say = fn s => 
+        (if String.isSubstring "Error" s orelse String.isSubstring "Fail" s
+         then (Control.Print.out := smlrun__cp;
+               (#say smlrun__cp) (!smlrun__prev);
+               (#say smlrun__cp) s)
+         else (smlrun__prev := s; ())),
+    flush = fn s => ()
+};
+"@ -split "[\r\n]+"
+
+   $outro = @"
+val _ = vext $arglist;
+val _ = OS.Process.exit (OS.Process.success);
+"@ -split "[\r\n]+"
+
+   $script = @()
+   $script += $intro
+   $script += $lines
+   $script += $outro
+
+   $tmpfile = ([System.IO.Path]::GetTempFileName()) -replace "[.]tmp",".sml"
+
+   $script | Out-File -Encoding "ASCII" $tmpfile
+
+   $env:CM_VERBOSE="false"
+
+   sml $tmpfile $args[1,$args.Length]
+
+   del $tmpfile
+
+} else {
+
+   "Unknown SML implementation name: $sml"
+   exit 2
+}