[Feature] Advanced Template for commits

[mkozek]

In commit templates allow to filter branch name and file list by regex.

Proposed syntax
${regex_T:{<filter regex>}:{<replacement regex>}} where T is "b" for branch, "f" for files.

Example:
${regex_b:{(.*)\/(issue-\d+).*}:{ID: $2 Type:$1}}
to convert branch name "feature/issue-1234-add-new-feature"
into: "ID: issue-1234 Type:feature"

[mkozek]

Sample regex to match the proposed syntax:

[GeneratedRegex(@"(\$\{regex_b:{(?<FilteringRegex>(?![*+?])(?:[^\r\n\[\/\\]|\\.|\[(?:[^\r\n\]\\]|\\.)*\])+)}:{(?<ReplacingRegex>(?![*+?])(?:[^\r\n\[\/\\]|\\.|\[(?:[^\r\n\]\\]|\\.)*\])+)}\})")]

[aikawayataro]

Wow, that's too much to handle with regex 😁
A more extensible and sensible solution would be a simple template engine. I would like to implement it if @love-linger accepts the feature. It is also possible to add a grammar to get highlighting in the commit editor

I also propose a different syntax for this:
${var/regex/replacement} => ${branch_name/(.*)\/(issue-\d+).*/ID: $2 Type:$1} (sed-like)
Stuff like regex_T and regex_b is not really nice. This can become a real regex hell when new variables are introduced.

[love-linger]

@aikawayataro You can try to create a PR for this feature.