lineinfile with a backslash in the regexp field

[fanvalt]

Hello,

I would like to replace the following line:

jstl.jar,taglibs-standard-spec-*.jar,\

with:

jstl.jar,taglibs-standard-spec-*.jar,icu4j-2.6.1.jar,\

I tried to double the backslash without any success, the issue occurs only on the regexp backslash:

For example, when doing this:

- name: catalina.properties jstl

  lineinfile:

    dest: /{{ tomcatdir }}/conf/catalina.properties

    regexp: "^jstl.jar,taglibs-standard-spec-*.jar,.*"

    line: "jstl.jar,taglibs-standard-spec-*.jar,icu4j-2.6.1.jar,\\"

I have no error but an extra line as it does not recognize the line to replace, I thought '.' was meaning any character and '*' as many as we want.

When using this one:

    regexp: "^jstl.jar,taglibs-standard-spec-*.jar,\\"

    line: "jstl.jar,taglibs-standard-spec-*.jar,icu4j-2.6.1.jar,\\"

I have a syntax error.

Can you help me about using the backslash in the regexp parameter, without being a special character ?

Regards