From ec3d2ded1198b9093b93f51baad2f07e7e8184e9 Mon Sep 17 00:00:00 2001
From: Miro Hrončok <miro@hroncok.cz>
Date: Oct 10 2018 13:45:38 +0000
Subject: Check what's removed


---

diff --git a/depython2ize.py b/depython2ize.py
index 6fb3107..bf52819 100755
--- a/depython2ize.py
+++ b/depython2ize.py
@@ -1,6 +1,7 @@
 #!/usr/bin/python3
 
 import argparse
+import json
 import os
 import pathlib
 import subprocess
@@ -16,6 +17,7 @@ parser.add_argument('-b', '--bumpspec', action='store_true')
 parser.add_argument('-c', '--commit', action='store_true')
 parser.add_argument('-u', '--user')
 parser.add_argument('-w', '--write', action='store_true')
+parser.add_argument('-r', '--results', action='store')
 parser.add_argument('--keep-py3dir', action='store_true')
 parser.add_argument('dirname', type=pathlib.Path, nargs='+')
 opts = parser.parse_args()
@@ -33,6 +35,13 @@ def resolve_macro(specfile, macro):
 def is_requires(type, pattern, line):
     return re.match(rf'{type}:\s*({pattern})', line) is not None
 
+def produced_packages(dirname, specfile):
+    command = ['rpm', '--define', f'_sourcedir {dirname}',
+               '--define', 'dist .fc30', '-q', '--qf', '%{NAME}\n',
+               '--specfile', f'{specfile}']
+    output = subprocess.check_output(command, universal_newlines=True)
+    return set(output.splitlines())
+
 def dprint(*args, **kwargs):
     if opts.debug:
         print(*args, **kwargs)
@@ -44,6 +53,12 @@ for dirname in opts.dirname:
     specfile, = dirname.glob('*.spec')
 
     print(f'==== {specfile}')
+    try:
+        old_packages = produced_packages(dirname, specfile)
+    except subprocess.CalledProcessError:
+        print('CANNOT PARSE SPEC')
+        continue
+
     new = pathlib.Path(f'{specfile}.tmp')
     try:
         # remove .tmp file to not leave obsolete stuff in case we bail out
@@ -157,6 +172,25 @@ for dirname in opts.dirname:
             cmd += ['-u', opts.user]
         subprocess.check_call(cmd)
 
+    try:
+        new_packages = produced_packages(dirname, new)
+    except subprocess.CalledProcessError:
+        print('CANNOT PARSE SPEC')
+        continue
+    removed_packages = old_packages - new_packages
+    print('Removed packages:', ', '.join(sorted(removed_packages)))
+    if opts.results:
+        ok = True
+        with open(opts.results) as f:
+            results = json.load(f)
+        for pkg in removed_packages:
+            if pkg not in results or results[pkg]['verdict'] != 'drop_now':
+                print(f'CANNOT REMOVE {pkg}')
+                ok = False
+                continue
+        if not ok:
+            continue
+
     if opts.diff:
         subprocess.call(['git', 'diff', f'-U{opts.U}', '--no-index', specfile, new])