Simplify argument parsing (#459)

With the current state of automation scripts, this is not possible anymore to launch script with multiple auto configs.

src/ghc-wiki.py

@@ -14,7 +14,8 @@ References:
 import re
 from typing import Any, Generator, Iterator
 
-from common import dates, http, releasedata
+from common import dates, http
+from common.releasedata import ProductData, config_from_argv
 
 
 def parse_markdown_tables(lineiter: Iterator[str]) -> Generator[list[list[Any]], Any, None]:
@@ -50,41 +51,41 @@ def maybe_markdown_table_row(line: str) -> list[str] | None:
         return None
     return [x.strip() for x in line.strip('|').split('|')]
 
-for config in releasedata.list_configs_from_argv():
-    with releasedata.ProductData(config.product) as product:
-        resp = http.fetch_url(config.url)
-        resp.raise_for_status()
-        data = resp.json()
-        assert data['title'] == "GHC Status"
-        assert data['format'] == "markdown"
-        md = data['content'].splitlines()
+config = config_from_argv()
+with ProductData(config.product) as product_data:
+    resp = http.fetch_url(config.url)
+    resp.raise_for_status()
+    data = resp.json()
+    assert data['title'] == "GHC Status"
+    assert data['format'] == "markdown"
+    md = data['content'].splitlines()
 
-        #-- Parse tables out of the wiki text. At time of writing, the script expects exactly two:
-        #-- 1. "Most recent major" with 5 columns
-        #-- 2. "All released versions" with 5 columns
-        [series_table, patch_level] = parse_markdown_tables(iter(md))
+    #-- Parse tables out of the wiki text. At time of writing, the script expects exactly two:
+    #-- 1. "Most recent major" with 5 columns
+    #-- 2. "All released versions" with 5 columns
+    [series_table, patch_level] = parse_markdown_tables(iter(md))
 
-        for row in series_table[1:]:
-            [series, _download_link, _most_recent, next_planned, status] = row
-            if status == "Next major release":
-                continue
+    for row in series_table[1:]:
+        [series, _download_link, _most_recent, next_planned, status] = row
+        if status == "Next major release":
+            continue
 
-            series = series.split(' ')[0]
-            series = series.replace('\\.', '.')
-            if series == "Nightlies":
-                continue
-            status = status.lower()
+        series = series.split(' ')[0]
+        series = series.replace('\\.', '.')
+        if series == "Nightlies":
+            continue
+        status = status.lower()
 
-            #-- See discussion in https://github.com/endoflife-date/endoflife.date/pull/6287
-            r = product.get_release(series)
-            #-- The clearest semblance of an EOL signal we get
-            r.set_eol("not recommended for use" in status or ":red_circle:" in status)
-            #-- eoasColumn label is "Further releases planned"
-            r.set_eoas(any(keyword in next_planned for keyword in ("None",  "N/A")))
+        #-- See discussion in https://github.com/endoflife-date/endoflife.date/pull/6287
+        r = product_data.get_release(series)
+        #-- The clearest semblance of an EOL signal we get
+        r.set_eol("not recommended for use" in status or ":red_circle:" in status)
+        #-- eoasColumn label is "Further releases planned"
+        r.set_eoas(any(keyword in next_planned for keyword in ("None",  "N/A")))
 
-        for row in patch_level[1:]:
-            [milestone, _download_link, date, _ticket, _manager] = row
-            version = milestone.lstrip('%')
-            version = version.split(' ') [0]
-            date = dates.parse_date(date)
-            product.declare_version(version, date)
+    for row in patch_level[1:]:
+        [milestone, _download_link, date, _ticket, _manager] = row
+        version = milestone.lstrip('%')
+        version = version.split(' ') [0]
+        date = dates.parse_date(date)
+        product_data.declare_version(version, date)