Now committed as r12-1700-gedf0c3ffb59d75c11e05bc722432dc554e275c72 / as
attached.

(We had some follow-up discussion on IRC.)

On 21.06.21 14:53, Martin Liška wrote:
+            # PR number in the file name
+            fname = os.path.basename(file.path)

This is a dead code.

+ fname = os.path.splitext(fname)[0]
+            m = pr_filename_regex.search(fname)
(Meant was the 'splitext' line - it is dead code as the re.search globs
all digits after 'pr' and then stops, ignoring the rest, including file
extensions. – I first thought it referred to the basename line, which
confused me.)
+ parser.add_argument('-b', '--pr-numbers', action='append',
+                        help='Add the specified PRs (comma
separated)')

Do we really want to support '-b 1 -b 2' and also -b '1,2' formats?
Seems to me quite
complicated.
[...]
I would start with -b 1,2,3,4 syntax. It will be likely easier for git
alias integration.

Done so.

I note that argparse permits '-d dir1 -d dir2 -b bug1 -b bug2' which
then only keeps the dir2 as directory and bug2 as bug without printing
an error (or warning) for ignoring dir1 and bug1.

Tobias

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commit edf0c3ffb59d75c11e05bc722432dc554e275c72
Author: Tobias Burnus <tob...@codesourcery.com>
Date:   Mon Jun 21 15:17:22 2021 +0200

    contrib/mklog.py: Improve PR handling
    
    Co-authored-by: Martin Sebor <mse...@redhat.com>
    
    contrib/ChangeLog:
    
            * mklog.py (bugzilla_url): Fetch also component.
            (pr_filename_regex): New.
            (get_pr_titles): Update PR string with correct format and component.
            (generate_changelog): Take additional PRs; extract PR from the
            filename.
            (__main__): Add -b/--pr-numbers argument.
            * test_mklog.py (EXPECTED4): Update to expect a PR for the new file.
---
 contrib/mklog.py      | 38 +++++++++++++++++++++++++++++---------
 contrib/test_mklog.py |  3 +++
 2 files changed, 32 insertions(+), 9 deletions(-)

diff --git a/contrib/mklog.py b/contrib/mklog.py
index 1f59055e723..0b434f67971 100755
--- a/contrib/mklog.py
+++ b/contrib/mklog.py
@@ -42,6 +42,7 @@ pr_regex = re.compile(r'(\/(\/|\*)|[Cc*!])\s+(?P<pr>PR [a-z+-]+\/[0-9]+)')
 prnum_regex = re.compile(r'PR (?P<comp>[a-z+-]+)/(?P<num>[0-9]+)')
 dr_regex = re.compile(r'(\/(\/|\*)|[Cc*!])\s+(?P<dr>DR [0-9]+)')
 dg_regex = re.compile(r'{\s+dg-(error|warning)')
+pr_filename_regex = re.compile(r'(^|[\W_])[Pp][Rr](?P<pr>\d{4,})')
 identifier_regex = re.compile(r'^([a-zA-Z0-9_#].*)')
 comment_regex = re.compile(r'^\/\*')
 struct_regex = re.compile(r'^(class|struct|union|enum)\s+'
@@ -52,7 +53,7 @@ fn_regex = re.compile(r'([a-zA-Z_][^()\s]*)\s*\([^*]')
 template_and_param_regex = re.compile(r'<[^<>]*>')
 md_def_regex = re.compile(r'\(define.*\s+"(.*)"')
 bugzilla_url = 'https://gcc.gnu.org/bugzilla/rest.cgi/bug?id=%s&;' \
-               'include_fields=summary'
+               'include_fields=summary,component'
 
 function_extensions = {'.c', '.cpp', '.C', '.cc', '.h', '.inc', '.def', '.md'}
 
@@ -118,20 +119,23 @@ def sort_changelog_files(changed_file):
 
 
 def get_pr_titles(prs):
-    output = ''
-    for pr in prs:
+    output = []
+    for idx, pr in enumerate(prs):
         pr_id = pr.split('/')[-1]
         r = requests.get(bugzilla_url % pr_id)
         bugs = r.json()['bugs']
         if len(bugs) == 1:
-            output += '%s - %s\n' % (pr, bugs[0]['summary'])
-            print(output)
+            prs[idx] = 'PR %s/%s' % (bugs[0]['component'], pr_id)
+            out = '%s - %s\n' % (prs[idx], bugs[0]['summary'])
+            if out not in output:
+                output.append(out)
     if output:
-        output += '\n'
-    return output
+        output.append('')
+    return '\n'.join(output)
 
 
-def generate_changelog(data, no_functions=False, fill_pr_titles=False):
+def generate_changelog(data, no_functions=False, fill_pr_titles=False,
+                       additional_prs=None):
     changelogs = {}
     changelog_list = []
     prs = []
@@ -139,6 +143,8 @@ def generate_changelog(data, no_functions=False, fill_pr_titles=False):
     diff = PatchSet(data)
     global firstpr
 
+    if additional_prs:
+        prs = [pr for pr in additional_prs if pr not in prs]
     for file in diff:
         # skip files that can't be parsed
         if file.path == '/dev/null':
@@ -154,21 +160,32 @@ def generate_changelog(data, no_functions=False, fill_pr_titles=False):
             # Only search first ten lines as later lines may
             # contains commented code which a note that it
             # has not been tested due to a certain PR or DR.
+            this_file_prs = []
             for line in list(file)[0][0:10]:
                 m = pr_regex.search(line.value)
                 if m:
                     pr = m.group('pr')
                     if pr not in prs:
                         prs.append(pr)
+                        this_file_prs.append(pr.split('/')[-1])
                 else:
                     m = dr_regex.search(line.value)
                     if m:
                         dr = m.group('dr')
                         if dr not in prs:
                             prs.append(dr)
+                            this_file_prs.append(dr.split('/')[-1])
                     elif dg_regex.search(line.value):
                         # Found dg-warning/dg-error line
                         break
+            # PR number in the file name
+            fname = os.path.basename(file.path)
+            m = pr_filename_regex.search(fname)
+            if m:
+                pr = m.group('pr')
+                pr2 = 'PR ' + pr
+                if pr not in this_file_prs and pr2 not in prs:
+                    prs.append(pr2)
 
     if prs:
         firstpr = prs[0]
@@ -286,6 +303,9 @@ if __name__ == '__main__':
     parser = argparse.ArgumentParser(description=help_message)
     parser.add_argument('input', nargs='?',
                         help='Patch file (or missing, read standard input)')
+    parser.add_argument('-b', '--pr-numbers', action='store',
+                        type=lambda arg: arg.split(','), nargs="?",
+                        help='Add the specified PRs (comma separated)')
     parser.add_argument('-s', '--no-functions', action='store_true',
                         help='Do not generate function names in ChangeLogs')
     parser.add_argument('-p', '--fill-up-bug-titles', action='store_true',
@@ -309,7 +329,7 @@ if __name__ == '__main__':
         update_copyright(data)
     else:
         output = generate_changelog(data, args.no_functions,
-                                    args.fill_up_bug_titles)
+                                    args.fill_up_bug_titles, args.pr_numbers)
         if args.changelog:
             lines = open(args.changelog).read().split('\n')
             start = list(takewhile(lambda l: not l.startswith('#'), lines))
diff --git a/contrib/test_mklog.py b/contrib/test_mklog.py
index a0670dac119..f5e9ecd577c 100755
--- a/contrib/test_mklog.py
+++ b/contrib/test_mklog.py
@@ -240,6 +240,9 @@ index 4ad78c1f77b..6687b368038 100644
 '''
 
 EXPECTED4 = '''\
+
+	PR 50209
+
 gcc/ChangeLog:
 
 	* ipa-icf.c:

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