Added Ph-St's rmrl renderer

Author: hersle

render_rmrl.py

@@ -0,0 +1,30 @@
+#!/usr/bin/python3
+
+# This method uses the third-party renderer rmrl to render reMarkable documents locally on the computer.
+# It downloads the raw reMarkable files to the computer and renders them locally.
+#
+# It requires the Python module rmrl (https://github.com/rschroll/rmrl/) and SSH access to the reMarkable (to download the raw files), but no USB connection.
+# It is not extensively tested, and fails in some cases.
+#
+# Thanks to Ph-St for contributing this renderer (https://github.com/hersle/rmirro/issues/10)!
+
+import sys
+import os.path
+import subprocess
+from rmrl import render
+
+def render_rmrl(input, output):
+    stream = render(input)
+    with open(output, "wb") as out_file:
+        out_file.write(stream.read())
+
+if __name__ == "__main__":
+    args = sys.argv[1:]
+    assert len(args) == 2, "usage: render_rmrl.py infile outfile"
+
+    infile = args[0]
+    outfile = args[1]
+
+    status = render_rmrl(infile, outfile)
+    
+    exit(status)

rmirro.py

@@ -290,9 +290,11 @@ def download(self):
         else: # is file
             success = False
             for renderer in renderers:
-                success = pc_run([f"{DIR}/{renderer}", infile, outfile]).returncode == 0 # try to render
+                proc = pc_run([f"{DIR}/{renderer}", infile, outfile]) # try to render
+                success = proc.returncode == 0
                 if len(renderers) > 1 or args.verbose:
                     print(f"- {renderer}", "succeeded" if success else "failed")
+                print(proc.stderr, end="")
                 if success:
                     break # jump out upon first successful render