whew. sorted out a lot of gi/BD and fallback inconsistencies...

docs/reference/generate_gpt_guid.py

@@ -0,0 +1,93 @@
+#!/usr/bin/env python3
+
+import os
+import re
+import subprocess
+import uuid
+##
+import requests
+from bs4 import BeautifulSoup
+
+# You, the average user, will probably have absolutely no use for this.
+
+types = {'gpt': {'local': [],
+                 'wiki': {}},
+         'msdos': {'local': [],
+                   'src': []}}
+
+# GPT
+cmd = ['/usr/bin/sfdisk', '--list-types', '--label=gpt']
+url = 'https://en.wikipedia.org/wiki/GUID_Partition_Table'
+# First get the local list.
+with open(os.devnull, 'wb') as devnull:
+    cmd_out = subprocess.run(cmd, stdout = subprocess.PIPE, stderr = devnull)
+stdout = [i for i in cmd_out.stdout.decode('utf-8').splitlines() if i not in ('Id  Name', '')]
+for idx, line in enumerate(stdout):
+    i = idx + 1
+    l = line.split()
+    u = l.pop(0)
+    desc = ' '.join(l)
+    types['gpt']['local'].append((i, desc, uuid.UUID(hex = u)))
+# Then wikipedia.
+req = requests.get(url)
+if not req.ok:
+    raise RuntimeError('Could not access {0}'.format(url))
+soup = BeautifulSoup(req.content, 'lxml')
+tbl = soup.find('span', attrs = {'id': 'Partition_type_GUIDs', 'class': 'mw-headline'}).findNext('table').find('tbody')
+c = None
+t = None
+idx = 1
+strip_ref = re.compile(r'(?P<name>[A-Za-z\s()/0-9,.+-]+)\[?.*')
+for row in tbl.find_all('tr'):
+    cols = [e.text.strip() for e in row.find_all('td')]
+    if not cols:
+        continue
+    if len(cols) == 3:
+        temp_c = strip_ref.search(cols[0].strip())
+        if not temp_c:
+            raise RuntimeError('Error when parsing/regexing: {0}'.format(cols[0].strip()))
+        c = temp_c.group('name')
+        cols.pop(0).strip()
+        if c not in types['gpt']['wiki']:
+            types['gpt']['wiki'][c] = []
+    if len(cols) == 2:
+        temp_t = strip_ref.search(cols[0].strip())
+        if not temp_t:
+            raise RuntimeError('Error when parsing/regexing: {0}'.format(cols[0].strip()))
+        t = temp_t.group('name')
+        cols.pop(0)
+    u = cols[0]
+    types['gpt']['wiki'][c].append((idx, t, uuid.UUID(hex = u)))
+    idx += 1
+
+# MSDOS
+cmd = ['/usr/bin/sfdisk', '--list-types', '--label=dos']
+url = 'https://git.kernel.org/pub/scm/utils/util-linux/util-linux.git/plain/include/pt-mbr-partnames.h'
+with open(os.devnull, 'wb') as devnull:
+    cmd_out = subprocess.run(cmd, stdout = subprocess.PIPE, stderr = devnull)
+stdout = [i for i in cmd_out.stdout.decode('utf-8').splitlines() if i not in ('Id  Name', '')]
+for idx, line in enumerate(stdout):
+    i = idx + 1
+    l = line.split()
+    b = '{0:0>2}'.format(l.pop(0).upper())
+    desc = ' '.join(l)
+    types['msdos']['local'].append((i, desc, bytes.fromhex(b)))
+# Then the source (master branch's HEAD). It gets messy but whatever. This is actually something unique to fdisk.
+req = requests.get(url)
+if not req.ok:
+    raise RuntimeError('Could not access {0}'.format(url))
+line_re = re.compile(r'^\s+{0x')
+str_re = re.compile(r'^\s+{0x(?P<b>[A-Fa-f0-9]+),\s*N_\("(?P<desc>[^"]+)"\).*')
+idx = 1
+for line in req.content.decode('utf-8').splitlines():
+    if not line_re.search(line):
+        continue
+    s = str_re.search(line)
+    if not s:
+        raise RuntimeError('Error when parsing/regexing: {0}'.format(line.strip()))
+    b = s.group('b').upper()
+    desc = s.group('desc')
+    types['msdos']['src'].append((idx, desc, bytes.fromhex(b)))
+    idx += 1
+
+print(types)