blasphemy: add command to produce a patched copy of the input binary

blasphemy

@@ -3,6 +3,7 @@ from subprocess import run, check_output
 import sys
 import os
 import argparse
+import shutil
 
 SEPARATOR = " => "
 LIBRARY_STORE = os.path.join("/", "gnu", "store")
@@ -88,9 +89,11 @@ parser.add_argument("--run", nargs="*", help="run command with specified args")
 parser.add_argument("--command", help="command to wrap or run (default to the first input binary)")
 parser.add_argument("--arguments", nargs="+", default=[], help="Additional arguments to pass to command")
 parser.add_argument("--inputs", nargs="+", default=[], help="input binaries to scan for dependencies")
+parser.add_argument("--paths", nargs="*", default=[], help="Additional paths to add to library search path")
+parser.add_argument("--patch", help="create a patched copy of command with the given name")
 args = parser.parse_args()
 
-paths = []
+paths = args.paths
 pre_command = [LOADER]
 command = args.command
 
@@ -106,13 +109,21 @@ if (not command) and args.inputs:
 
 #command[0] = os.path.abspath(command[0])
 
-command = pre_command + [command] + args.arguments
+full_command = pre_command + [command] + args.arguments
 if args.run is not None:
     environment = {"LD_LIBRARY_PATH": make_ld_library_path(paths)}
     environment.update(os.environ)
-    completed_process = run(command + args.run, env=environment)
+    completed_process = run(full_command + args.run, env=environment)
     sys.exit(completed_process.returncode)
 elif args.wrap:
-    print(generate_wrapper(paths, command))
+    print(generate_wrapper(paths, full_command))
+elif args.patch is not None:
+    shutil.copy(command, args.patch)
+    run([
+        "patchelf",
+        "--set-interpreter", LOADER,
+        "--set-rpath", make_ld_library_path(paths),
+        args.patch
+    ])
 else:
     print_paths(paths)