refactor parallel code

openos/source.lua

@@ -0,0 +1,36 @@
+local shell = require("shell")
+local process = require("process")
+
+local args, options = shell.parse(...)
+
+if #args ~= 1 then
+  io.stderr:write("specify a single file to source\n");
+  return 1
+end
+
+local file, open_reason = io.open(args[1], "r")
+
+if not file then
+  if not options.q then
+    io.stderr:write(string.format("could not source %s because: %s\n", args[1], open_reason));
+  end
+  return 1
+end
+
+local lines = file:lines()
+
+while true do  
+  local line = lines()
+  if not line then
+    break
+  end
+  local current_data = process.info().data
+  
+  local source_proc = process.load((assert(os.getenv("SHELL"), "no $SHELL set")))
+  local source_data = process.list[source_proc].data
+  source_data.aliases = current_data.aliases -- hacks to propogate sub shell env changes
+  source_data.vars = current_data.vars
+  process.internal.continue(source_proc, _ENV, line)
+end
+
+file:close()