gistfile1.c

body common control {
    bundlesequence => { "set_sections" };
}

bundle agent set_sections {
    vars:
        "value2in1" string => "No";
        "value3in2" string => "Yes";

    files:
        "/tmp/foo"
            edit_line => section_config("$(value2in1)", "$(value3in2)");
}

bundle edit_line section_config(value2in1, value3in2) {
    delete_lines:
        "value3.*"
            select_region => INI_section("section=one");
        "value2.*"
            select_region => INI_section("section=one");
        "value3.*"
            select_region => INI_section("section=two");

    insert_lines:
        "value2=$(value2in1)"
            select_region => INI_section("section=one");
        "value3=$(value3in2)"
            select_region => INI_section("section=two");
}

# This body comes from the cfengine_stdlib.cf
body select_region INI_section(x) {
    select_start => "\[$(x)\]\s*";
    select_end => "\[.*\]\s*";
}