templates: add filter to reverse list
The filter supports only lists because for lists, it’s straightforward to
implement. Reversing text doesn’t seem very useful and is hard to implement.
Reversing the bytes would break multi-bytes encodings. Reversing the code
points would break characters consisting of multiple code points. Reversing
graphemes is non-trivial without using a library not included in the standard
library.
#require test-repo hg10
$ . "$TESTDIR/helpers-testrepo.sh"
$ cat > $TESTTMP/check_ascii.py <<EOF
> import sys
> for file_path in sys.argv[1:]:
> with open(file_path, 'br') as f:
> try:
> f.read().decode('ascii', 'strict')
> except UnicodeDecodeError as exc:
> print('%s: %s' % (file_path, exc))
> EOF
There are some web servers in the wild that can serve static files with an
incorrect encoding (e.g. https://bz.mercurial-scm.org/show_bug.cgi?id=6559).
One way to prevent any issues is to not use any non-ASCII characters, e.g.
URL-encoding them or using HTML entities.
check charset of all tracked files ending in .js
$ cd "`dirname "$TESTDIR"`"
$ testrepohg locate 'set:**.js' \
> 2>/dev/null \
> | xargs "$PYTHON" $TESTTMP/check_ascii.py