Email generation as part of build process

Moved email source to separate directory, added the task
"generate-emails" to create html files.

mail/generate.py

@@ -0,0 +1,34 @@
+import subprocess
+import shutil
+from pathlib import Path
+
+def runcmd(cmd):
+    proc = subprocess.Popen(cmd.split(), stdout=subprocess.PIPE)
+    return proc.communicate()
+
+local_path = Path(__file__).resolve().parent
+node_bin = local_path.parent / 'node_modules' / '.bin'
+
+for mjml in [f for f in local_path.iterdir() if f.is_file() and 'mjml' in f.suffix]:
+    print(f'Compiling {mjml.name}')
+    fname = mjml.with_suffix(".html")
+    runcmd(f'{str(node_bin / "mjml")} {str(mjml)} -o {str(fname)}')
+    if fname.is_file():
+        print('Done.')
+
+html = [f for f in local_path.iterdir() if f.is_file() and 'html' in f.suffix]
+
+output = local_path.parent / 'jellyfin_accounts' / 'data'
+
+for f in html:
+    shutil.copy(str(f),
+                str(output / f.name))
+    print(f'Copied {f.name} to {str(output / f.name)}')
+    txtfile = f.with_suffix('.txt')
+    if txtfile.is_file():
+        shutil.copy(str(txtfile),
+                    str(output / txtfile.name))
+        print(f'Copied {txtfile.name} to {str(output / txtfile.name)}')
+    else:
+        print(f'Warning: {txtfile.name} does not exist. Text versions of emails should be supplied.')
+