In Python raw strings, newlines can't be escaped with a backslash. If
you do that, both the backslash and the newline become part of the
string. This meant that the regex for constants both started and ended
with a newline which caused every other constant to be skipped.
When changing the options weechat.network.gnutls_ca_system or
weechat.network.gnutls_ca_user, the GnuTLS credentials are freed then allocated
again, but the verification function used to check the certificate on
connection is not set again.
As a consequence, any TLS connection is made without checking the certificate.
This regression was introduced in version 3.2, when the options were changed to
automatically load system certificates without having to give the path, and to
let user give an extra custom path with certificates.
The plugin API function config_new_option accepts null as the
default_value and/or value however the scripting APIs (except for lua)
didn't allow sending null as a parameter value, so it was impossible to
use it this way. This allows sending a null value for these parameters.
Lua already supported sending in nil for these parameters and it works
as expected, so nothing is changed for this plugin.
For Guile you can now send in #nil, for JavaScript null or undefined,
for Perl undef, for PHP NULL, for Python None, for Ruby nil and for Tcl
$::weechat::WEECHAT_NULL.
In all of these languages except Tcl this is the special value
indicating a missing value. However Tcl only has one type, string, so it
doesn't have a null value. Therefore I created a constant with the value
`\uFFFF\uFFFF\uFFFFWEECHAT_NULL\uFFFF\uFFFF\uFFFF` which is used
instead. This is very unlikely to appear unintentionally. Using the
unicode code point \uFFFF was suggested on
https://wiki.tcl-lang.org/page/null.
I tested this with these scripts:
https://gist.github.com/trygveaa/f91977dde5d2876d502bf55fbf9b50cc
This fixes the compilation warning:
weechat-guile.c: In function ‘weechat_plugin_init’:
weechat-guile.c:1270:5: warning: ‘scm_install_gmp_memory_functions’ is deprecated [-Wdeprecated-declarations]
Sébastien Helleu