Use os.execv instead of subprocess.run when no further action is taken.

This prevents the underlying file from being marked busy while a
long-running action is happening (e.g. eureka is open).

dcc/eureka.py

@@ -1,6 +1,6 @@
 import dcc.doom_base
 import dcc.config
-import subprocess
+import os
 
 
 class Eureka(dcc.doom_base.WadMap):
@@ -24,7 +24,7 @@ class Eureka(dcc.doom_base.WadMap):
         if complevel == "11" or complevel == "21":
             port = "mbf"
 
-        subprocess.run(
+        os.execvp("eureka",
             ["eureka"] + ["-iwad", iwad] + ["-w", parsed_args.map]
             + ["-p", port] + [mw]
         )

dcc/fabricate.py

@@ -1,8 +1,8 @@
 import contextlib
 import dcc.config
 import dcc.doom_base
+import os
 import shutil
-import subprocess
 import tempfile
 
 
@@ -18,7 +18,7 @@ class Fabricate(dcc.doom_base.WadMap):
                 command = [self.dsda]
                 if not parsed_args.fg and shutil.which("xvfb-run") is not None:
                     command = ["xvfb-run"] + command
-                subprocess.run(
+                os.execvp(command[0],
                     command + self.dsda_preamble()
                     + ["-timedemo", self.demo_in_path()]
                     + ["-viddump", self.video_path()]

dcc/pb.py

@@ -1,8 +1,8 @@
 import dcc.config
 import dcc.doom_base
-import subprocess
+import os
 
 
 class PB(dcc.doom_base.WadMap):
     def take_action(self, parsed_args):
-        subprocess.run(["ffplay", self.video_path()])
+        os.execvp("ffplay", ["ffplay", self.video_path()])

dcc/play.py

@@ -1,8 +1,8 @@
 import dcc.config
 import dcc.doom_base
-import subprocess
+import os
 
 
 class Play(dcc.doom_base.WadMap):
     def take_action(self, parsed_args):
-        subprocess.run([self.dsda] + self.dsda_preamble())
+        os.execv(self.dsda, [self.dsda] + self.dsda_preamble())

dcc/record.py

@@ -1,11 +1,11 @@
 import dcc.config
 import dcc.doom_base
-import subprocess
+import os
 
 
 class Record(dcc.doom_base.WadMap):
     def take_action(self, parsed_args):
-        subprocess.run(
+        os.execv(self.dsda,
             [self.dsda] + self.dsda_preamble() +
             ["-record", self.demo_out_path()]
         )

dcc/rib.py

@@ -1,7 +1,6 @@
 import dcc.doom_base
 import pathlib
 import os
-import subprocess
 import time
 
 
@@ -42,7 +41,7 @@ class RIB(dcc.doom_base.WadMap):
                 + f"and map {parsed_args.map} (tried to look in {demodir})"
             )
 
-        subprocess.run(
+        os.execv(self.dsda,
             [self.dsda] + self.dsda_preamble(warp=False)
             + ["-playdemo", demo]
             + ["-skiptic", str(-35 * parsed_args.secs_before)]