Dpkg::Substvars - phpMan

NAME
    Dpkg::Substvars - handle variable substitution in strings

DESCRIPTION
    It provides a class which is able to substitute variables in strings.

METHODS
    $s = Dpkg::Substvars->new($file)
            Create a new object that can do substitutions. By default it
            contains generic substitutions like ${Newline}, ${Space},
            ${Tab}, ${dpkg:Version} and ${dpkg:Upstream-Version}.

            Additional substitutions will be read from the $file passed as
            parameter.

            It keeps track of which substitutions were actually used (only
            counting substvars(), not get()), and warns about unused
            substvars when asked to. The substitutions that are always
            present are not included in these warnings.

    $s->set($key, $value)
            Add/replace a substitution.

    $s->set_as_used($key, $value)
            Add/replace a substitution and mark it as used (no warnings will
            be produced even if unused).

    $s->set_as_auto($key, $value)
            Add/replace a substitution and mark it as used and automatic (no
            warnings will be produced even if unused).

    $s->get($key)
            Get the value of a given substitution.

    $s->delete($key)
            Remove a given substitution.

    $s->mark_as_used($key)
            Prevents warnings about a unused substitution, for example if it
            is provided by default.

    $s->parse($fh, $desc)
            Add new substitutions read from the filehandle. $desc is used to
            identify the filehandle in error messages.

            Returns the number of substitutions that have been parsed with
            success.

    $s->load($file)
            Add new substitutions read from $file.

    $s->set_version_substvars($sourceversion, $binaryversion)
            Defines ${binary:Version}, ${source:Version} and
            ${source:Upstream-Version} based on the given version strings.

            These will never be warned about when unused.

    $s->set_arch_substvars()
            Defines architecture variables: ${Arch}.

            This will never be warned about when unused.

    $s->set_vendor_substvars()
            Defines vendor variables: ${vendor:Name} and ${vendor:Id}.

            These will never be warned about when unused.

    $s->set_desc_substvars()
            Defines source description variables: ${source:Synopsis} and
            ${source:Extended-Description}.

            These will never be warned about when unused.

    $s->set_field_substvars($ctrl, $prefix)
            Defines field variables from a Dpkg::Control object, with each
            variable having the form "${$prefix:$field}".

            They will never be warned about when unused.

    $newstring = $s->substvars($string)
            Substitutes variables in $string and return the result in
            $newstring.

    $s->warn_about_unused()
            Issues warning about any variables that were set, but not used.

    $s->set_msg_prefix($prefix)
            Define a prefix displayed before all warnings/error messages
            output by the module.

    $s->filter(remove => $rmfunc)
    $s->filter(keep => $keepfun)
            Filter the substitution variables, either removing or keeping
            all those that return true when $rmfunc->($key) or
            $keepfunc->($key) is called.

    "$s"    Return a string representation of all substitutions variables
            except the automatic ones.

    $str = $s->output([$fh])
            Return all substitutions variables except the automatic ones. If
            $fh is passed print them into the filehandle.

    $s->save($file)
            Store all substitutions variables except the automatic ones in
            the indicated file.

CHANGES
  Version 2.00 (dpkg 1.20.0)
    Remove method: $s->no_warn().

    New method: $s->set_vendor_substvars().

  Version 1.06 (dpkg 1.19.0)
    New method: $s->set_desc_substvars().

  Version 1.05 (dpkg 1.18.11)
    Obsolete substvar: Emit an error on Source-Version substvar usage.

    New return: $s->parse() now returns the number of parsed substvars.

    New method: $s->set_field_substvars().

  Version 1.04 (dpkg 1.18.0)
    New method: $s->filter().

  Version 1.03 (dpkg 1.17.11)
    New method: $s->set_as_auto().

  Version 1.02 (dpkg 1.16.5)
    New argument: Accept a $binaryversion in $s->set_version_substvars(),
    passing a single argument is still supported.

    New method: $s->mark_as_used().

    Deprecated method: $s->no_warn(), use $s->mark_as_used() instead.

  Version 1.01 (dpkg 1.16.4)
    New method: $s->set_as_used().

  Version 1.00 (dpkg 1.15.6)
    Mark the module as public.