patchtest: don't match BitBake python expansion as GitHub username

BitBake's Python expansion syntax looks very similar to GitHub usernames:
${@foo} - which triggers a false alarm from patchtest.

This patch adds a negative lookahead to the GitHub username matching pattern:
only match in case the pattern doesn't start with "${" characters.

Also add a test for it.

(From OE-Core rev: 6aa8eeadbb626bb5e5459ac2caf73b8fb0f2b936)

Signed-off-by: Gyorgy Sarvari <skandigraun@gmail.com>
Signed-off-by: Mathieu Dubois-Briand <mathieu.dubois-briand@bootlin.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

1 files changed, 1 insertions, 1 deletions

diff --git a/meta/lib/patchtest/patchtest_patterns.py b/meta/lib/patchtest/patchtest_patterns.py
index 50637cf499..655ecfd049 100644
--- a/meta/lib/patchtest/patchtest_patterns.py
+++ b/meta/lib/patchtest/patchtest_patterns.py
@@ -59,7 +59,7 @@ mbox_bugzilla_validation = pyparsing.Regex('\[(\s?YOCTO\s?#\s?(\d+)\s?,?)+\]')
 mbox_revert_shortlog_regex = pyparsing.Regex('Revert\s+".*"')
 mbox_shortlog_maxlength = 90
 # based on https://stackoverflow.com/questions/30281026/regex-parsing-github-usernames-javascript
-mbox_github_username = pyparsing.Regex('\B@([a-z0-9](?:-(?=[a-z0-9])|[a-z0-9]){0,38}(?<=[a-z0-9]))')
+mbox_github_username = pyparsing.Regex('\B(?<!\${)@([a-z0-9](?:-(?=[a-z0-9])|[a-z0-9]){0,38}(?<=[a-z0-9]))')
 
 # patch