1 files changed, 65 insertions, 0 deletions
diff --git a/appl/alphabet/fs/run.b b/appl/alphabet/fs/run.b
new file mode 100644
index 00000000..6f6a38bb
--- /dev/null
+++ b/appl/alphabet/fs/run.b
@@ -0,0 +1,65 @@
+implement Run, Fsmodule;
+include "sys.m";
+	sys: Sys;
+include "draw.m";
+include "sh.m";
+	sh: Sh;
+	Context: import sh;
+include "alphabet/reports.m";
+	Report: import Reports;
+include "alphabet/fs.m";
+	fs: Fs;
+	Value: import fs;
+	Fschan, Fsdata, Entrychan, Entry,
+	Gatechan, Gatequery, Nilentry, Option,
+	Next, Down, Skip, Quit: import Fs;
+
+Run: module {};
+
+types(): string
+{
+	return "sc";
+}
+
+badmod(p: string)
+{
+	sys->fprint(sys->fildes(2), "fs: size: cannot load %s: %r\n", p);
+	raise "fail:bad module";
+}
+
+init()
+{
+	sys = load Sys Sys->PATH;
+	fs = load Fs Fs->PATH;
+	if(fs == nil)
+		badmod(Fs->PATH);
+	fs->init();
+	sh = load Sh Sh->PATH;
+	if(sh == nil)
+		badmod(Sh->PATH);
+	sh->initialise();
+}
+
+run(drawctxt: ref Draw->Context, nil: ref Report,
+			nil: list of Option, args: list of ref Value): ref Value
+{
+	c := (hd args).c().i;
+	ctxt := Context.new(drawctxt);
+	ctxt.setlocal("s", nil);
+	{
+		ctxt.run(ref Sh->Listnode(c, nil)::nil, 0);
+	} exception e {
+	"fail:*" =>
+		sys->fprint(sys->fildes(2), "fs: run: exception %q raised in %s\n", e[5:], sh->cmd2string(c));
+		return nil;
+	}
+	sl := ctxt.get("s");
+	if(sl == nil || tl sl != nil){
+		sys->fprint(sys->fildes(2), "fs: run: $s has %d members; exactly one is required\n", len sl);
+		return nil;
+	}
+	s := (hd sl).word;
+	if(s == nil && (hd sl).cmd != nil)
+		s = sh->cmd2string((hd sl).cmd);
+	return ref Value.Vs(s);
+}