Rework run_script command.

* Use Python subprocess module.
 * Echo the command output to the console.
 * Print while things are still running.

compiler/verify/run_script.py

@@ -11,24 +11,67 @@ Some baseline functions to run scripts.
 
 import os
 import debug
+import subprocess
+import time
 from globals import OPTS
 
 
 def run_script(cell_name, script="lvs"):
     """ Run script and create output files. """
 
+    # FIXME: Set this value based on options somewhere
+    echo_cmd_output = True
+
     cwd = os.getcwd()
     os.chdir(OPTS.openram_temp)
     errfile = "{0}{1}.{2}.err".format(OPTS.openram_temp, cell_name, script)
     outfile = "{0}{1}.{2}.out".format(OPTS.openram_temp, cell_name, script)
     resultsfile = "{0}{1}.{2}.report".format(OPTS.openram_temp, cell_name, script)
 
-    cmd = "{0}run_{1}.sh 2> {2} 1> {3}".format(OPTS.openram_temp,
-                                               script,
+    scriptpath = '{0}run_{1}.sh'.format(OPTS.openram_temp, script)
+
+    debug.info(2, "Starting {}".format(scriptpath))
+    start = time.time()
+    with open(outfile, 'wb') as fo, open(errfile, 'wb') as fe:
+        p = subprocess.Popen(
+                [scriptpath], stdout=fo, stderr=fe, cwd=OPTS.openram_temp)
+
+        if echo_cmd_output:
+            tailo = subprocess.Popen([
+                'tail',
+                '-f',                # Follow the output
+                '--pid', str(p.pid), # Close when this pid exits
+                outfile,
+            ])
+            taile = subprocess.Popen([
+                'tail',
+                '-f',                # Follow the output
+                '--pid', str(p.pid), # Close when this pid exits
                 errfile,
-                                               outfile)
-    debug.info(2, cmd)
-    os.system(cmd)
+            ])
+
+    lastoutput = start
+    while p.poll() == None:
+        runningfor = time.time() - start
+        outputdelta = time.time() - lastoutput
+        if outputdelta > 30:
+            lastoutput = time.time()
+            debug.info(1, "Still running {} ({:.0f} seconds)".format(scriptpath, runningfor))
+        time.sleep(1)
+    assert p.poll() != None, (p.poll(), p)
+    p.wait()
+
+    # Kill the tail commands if they haven't finished.
+    if cmd_output:
+        if tailo.poll() != None:
+            tailo.kill()
+        tailo.wait()
+        if taile.poll() != None:
+            taile.kill()
+        taile.wait()
+
+    debug.info(2, "Finished {} with {}".format(scriptpath, p.returncode))
+
     os.chdir(cwd)
 
     return (outfile, errfile, resultsfile)