[v1] tools, xen/scripts: clear out Python syntax warnings

[PATCH 0/1] tools, xen/scripts: clear out Python syntax warnings

Posted by Ariel Otilibili 1 month, 3 weeks ago

Hello,

The series clears out Python syntax warnings. In all occurrences of the re methods,

```
$ git grep -Pn '[^\w_]re\.[a-z]+' | wc -l 
69
```

Where it was needed, the strings have been quoted as raw.

Thank you,

Ariel Otilibili (1):
  tools, xen/scripts: clear out Python syntax warnings

 tools/misc/xensymoops                         | 4 ++--
 tools/pygrub/src/GrubConf.py                  | 4 ++--
 tools/pygrub/src/pygrub                       | 6 +++---
 xen/scripts/xen_analysis/cppcheck_analysis.py | 4 ++--
 4 files changed, 9 insertions(+), 9 deletions(-)

-- 
2.47.1

[PATCH v2 0/1] tools, xen/scripts: clear out Python syntax warnings

Posted by Ariel Otilibili 1 month, 2 weeks ago

Hello,

The series clears out Python syntax warnings. In all occurrences of the re methods,

```
$ git grep -Pn '[^\w_]re\.[a-z]+' | wc -l 
69
```

Where it was needed, the strings have been quoted as raw.

Thank you,
--
v2:
* tools/misc/xensymoops got removed (2e955d2554, "tools/misc: Drop xensymoops")
* refined regexes (https://lore.kernel.org/all/49497f8c-a2e4-49a1-aac0-96d704834f0f@citrix.com/)

Ariel Otilibili (1):
  tools, xen/scripts: clear out Python syntax warnings

 tools/pygrub/src/GrubConf.py                  | 4 ++--
 tools/pygrub/src/pygrub                       | 6 +++---
 xen/scripts/xen_analysis/cppcheck_analysis.py | 4 ++--
 3 files changed, 7 insertions(+), 7 deletions(-)

-- 
2.47.1

[PATCH v2 1/1] tools, xen/scripts: clear out Python syntax warnings

Posted by Ariel Otilibili 1 month, 2 weeks ago

* since 3.12 invalid escape sequences generate SyntaxWarning
* in the future, these invalid sequences will generate SyntaxError
* therefore changed syntax to raw string notation.

Link: https://docs.python.org/3/whatsnew/3.12.html#other-language-changes
Fixes: d8f3a67bf98 ("pygrub: further improve grub2 support")
Fixes: dd03048708a ("xen/pygrub: grub2/grub.cfg from RHEL 7 has new commands in menuentry")
Fixes: d1b93ea2615 ("tools/pygrub: Make pygrub understand default entry in string format")
Fixes: 622e368758b ("Add ZFS libfsimage support patch")
Fixes: 02b26c02c7c ("xen/scripts: add cppcheck tool to the xen-analysis.py script")
Fixes: 56c0063f4e7 ("xen/misra: xen-analysis.py: Improve the cppcheck version check")

Cc: Anthony PERARD <anthony.perard@vates.tech>
Cc: Luca Fancellu <luca.fancellu@arm.com>
Cc: Andrew Cooper <andrew.cooper3@citrix.com>
Signed-off-by: Ariel Otilibili <Ariel.Otilibili-Anieli@eurecom.fr>
---
 tools/pygrub/src/GrubConf.py                  | 4 ++--
 tools/pygrub/src/pygrub                       | 6 +++---
 xen/scripts/xen_analysis/cppcheck_analysis.py | 4 ++--
 3 files changed, 7 insertions(+), 7 deletions(-)

diff --git a/tools/pygrub/src/GrubConf.py b/tools/pygrub/src/GrubConf.py
index 580c9628ca..904e7d5567 100644
--- a/tools/pygrub/src/GrubConf.py
+++ b/tools/pygrub/src/GrubConf.py
@@ -320,7 +320,7 @@ class GrubConfigFile(_GrubConfigFile):
 def grub2_handle_set(arg):
     (com,arg) = grub_split(arg,2)
     com="set:" + com
-    m = re.match("([\"\'])(.*)\\1", arg)
+    m = re.match(r"([\"\'])(.*)\1", arg)
     if m is not None:
         arg=m.group(2)
     return (com,arg)
@@ -402,7 +402,7 @@ class Grub2ConfigFile(_GrubConfigFile):
                 continue
 
             # new image
-            title_match = re.match('^menuentry ["\'](.*?)["\'] (.*){', l)
+            title_match = re.match(r'^menuentry ["\'](.*?)["\'] (.*){', l)
             if title_match:
                 if img is not None:
                     raise RuntimeError("syntax error: cannot nest menuentry (%d %s)" % (len(img),img))
diff --git a/tools/pygrub/src/pygrub b/tools/pygrub/src/pygrub
index 9d51f96070..e1657c494b 100755
--- a/tools/pygrub/src/pygrub
+++ b/tools/pygrub/src/pygrub
@@ -614,7 +614,7 @@ class Grub:
             title = self.cf.default
             while 1:
                 try:
-                    title = re.search('(\S)>(\S.+$)',title).group(2)
+                    title = re.search(r'(\S)>(\S.+$)',title).group(2)
                 except AttributeError:
                     break
 
@@ -1039,7 +1039,7 @@ if __name__ == "__main__":
 
     # if boot filesystem is set then pass to fsimage.open
     bootfsargs = '"%s"' % incfg["args"]
-    bootfsgroup = re.findall('zfs-bootfs=(.*?)[\s\,\"]', bootfsargs)
+    bootfsgroup = re.findall(r'zfs-bootfs=(.*?)[\s\,\"]', bootfsargs)
     if bootfsgroup:
         bootfsoptions = bootfsgroup[0]
     else:
@@ -1104,7 +1104,7 @@ if __name__ == "__main__":
     if chosencfg["args"]:
         zfsinfo = xenfsimage.getbootstring(fs)
         if zfsinfo is not None:
-            e = re.compile("zfs-bootfs=[\w\-\.\:@/]+" )
+            e = re.compile(r"zfs-bootfs=[\w\-.:@/]+" )
             (chosencfg["args"],count) = e.subn(zfsinfo, chosencfg["args"])
             if count == 0:
                chosencfg["args"] += " -B %s" % zfsinfo
diff --git a/xen/scripts/xen_analysis/cppcheck_analysis.py b/xen/scripts/xen_analysis/cppcheck_analysis.py
index 850335c998..ce7bda91b6 100644
--- a/xen/scripts/xen_analysis/cppcheck_analysis.py
+++ b/xen/scripts/xen_analysis/cppcheck_analysis.py
@@ -93,7 +93,7 @@ def __generate_suppression_list(out_file):
                         # start of a comment '/*'
                         comment_line_starts = re.match('^[ \t]*/\*.*$', line)
                         # Matches a line with text and the end of a comment '*/'
-                        comment_line_stops = re.match('^.*\*/$', line)
+                        comment_line_stops = re.match(r'^.*\*/$', line)
                         if (not comment_section) and comment_line_starts:
                             comment_section = True
                         if (len(line.strip()) != 0) and (not comment_section):
@@ -157,7 +157,7 @@ def generate_cppcheck_deps():
             "Error occured retrieving cppcheck version:\n{}\n\n{}"
         )
 
-    version_regex = re.search('^Cppcheck (\d+)\.(\d+)(?:\.\d+)?$',
+    version_regex = re.search(r'^Cppcheck (\d+)\.(\d+)(?:\.\d+)?$',
                               invoke_cppcheck, flags=re.M)
     # Currently, only cppcheck version >= 2.7 is supported, but version 2.8 is
     # known to be broken, please refer to docs/misra/cppcheck.txt
-- 
2.47.1