From b7c33a72e9393ee25c984d1994ac7a2820829414 Mon Sep 17 00:00:00 2001
From: Andrew Wygle <awygle@gmail.com>
Date: Fri, 24 Nov 2017 09:39:41 -0800
Subject: [PATCH] Minimum-modification change for stdin support

---
 sbysrc/sby.py      | 26 +++++++++++++++++++-------
 sbysrc/sby_core.py |  5 ++---
 2 files changed, 21 insertions(+), 10 deletions(-)

diff --git a/sbysrc/sby.py b/sbysrc/sby.py
index 922513b..ba0d80a 100644
--- a/sbysrc/sby.py
+++ b/sbysrc/sby.py
@@ -17,7 +17,7 @@
 # OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 #
 
-import os, sys, getopt, shutil
+import os, sys, getopt, shutil, tempfile
 ##yosys-sys-path##
 from sby_core import SbyJob
 
@@ -29,7 +29,7 @@ exe_paths = dict()
 
 def usage():
     print("""
-sby [options] <jobname>.sby
+sby [options] [<jobname>.sby]
 
     -d <dirname>
         set workdir name. default: <jobname> (without .sby)
@@ -78,10 +78,13 @@ for o, a in opts:
     else:
         usage()
 
-if len(args) != 1:
+if len(args) > 1:
     usage()
 
-sbyfile = args[0]
+if len(args) == 1:
+    sbyfile = args[0]
+    assert sbyfile.endswith(".sby")
+
 early_logmsgs = list()
 
 def early_log(msg):
@@ -89,8 +92,10 @@ def early_log(msg):
     print(early_logmsgs[-1])
 
 if workdir is None:
-    assert sbyfile.endswith(".sby")
-    workdir = sbyfile[:-4]
+    if sbyfile:
+        workdir = sbyfile[:-4]
+    else:
+        workdir = tempfile.mkdtemp()
 
 if opt_backup:
     backup_idx = 0
@@ -101,7 +106,11 @@ if opt_backup:
 
 if opt_force:
     early_log("Removing direcory '%s'." % (workdir))
-    shutil.rmtree(workdir, ignore_errors=True)
+    if sbyfile:
+        shutil.rmtree(workdir, ignore_errors=True)
+
+if sbyfile:
+    os.makedirs(workdir)
 
 job = SbyJob(sbyfile, workdir, early_logmsgs)
 
@@ -110,5 +119,8 @@ for k, v in exe_paths.items():
 
 job.run()
 
+if not sbyfile:
+    shutil.rmtree(workdir, ignore_errors=True)
+
 sys.exit(job.retcode)
 
diff --git a/sbysrc/sby_core.py b/sbysrc/sby_core.py
index 9f264be..a287525 100644
--- a/sbysrc/sby_core.py
+++ b/sbysrc/sby_core.py
@@ -16,7 +16,7 @@
 # OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 #
 
-import os, re, resource
+import os, re, resource, sys
 import subprocess, fcntl
 from shutil import copyfile
 from select import select
@@ -157,7 +157,6 @@ class SbyJob:
         self.logprefix = "SBY [%s]" % self.workdir
         self.summary = list()
 
-        os.makedirs(workdir)
         self.logfile = open("%s/logfile.txt" % workdir, "w")
 
         for line in early_logs:
@@ -167,7 +166,7 @@ class SbyJob:
         mode = None
         key = None
 
-        with open(filename, "r") as f:
+        with (open(filename, "r") if filename else sys.stdin) as f:
             with open("%s/config.sby" % workdir, "w") as cfgfile:
                 pycode = None
                 for line in f:
-- 
2.30.2