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biber for OpenBSD — Build Process
=================================

Perlbrew
--------
Once installed, [perlbrew](https://perlbrew.pl) can be started as
follows on OpenBSD:

1. Add a file named `kshrc` in `$HOME/perl5/perlbrew/etc/` with the
   following contents:
   
   ```sh
   export PERLBREW_SHELLRC_VERSION=0.98
   export PERLBREW_ROOT=/home/robert/perl5/perlbrew


	__perlbrew_reinit() {
    if [[ ! -d "$PERLBREW_HOME" ]]; then
        mkdir -p "$PERLBREW_HOME"
    fi

    [ -f "$PERLBREW_HOME/init" ] && rm "$PERLBREW_HOME/init"
    echo '# DO NOT EDIT THIS FILE' > "$PERLBREW_HOME/init"
    command perlbrew env $1 | \grep PERLBREW_ >> "$PERLBREW_HOME/init"
    . "$PERLBREW_HOME/init"
    __perlbrew_set_path
	}

	__perlbrew_set_path () {
    export PATH=${PERLBREW_PATH:-$PERLBREW_ROOT/bin}:$PATH
    hash -r
	}

	__perlbrew_set_env() {
    code=
    code="$($perlbrew_command env $@)" || return $?
    eval "$code"
	}

	__perlbrew_activate() {
    [[ -n $(alias perl 2>/dev/null) ]] && unalias perl 2>/dev/null

    if [[ -n "${PERLBREW_PERL:-}" ]]; then
          __perlbrew_set_env "${PERLBREW_PERL:-}${PERLBREW_LIB:+@}$PERLBREW_LIB"
    fi

    __perlbrew_set_path
	}

	__perlbrew_deactivate() {
    __perlbrew_set_env
    unset PERLBREW_PERL
    unset PERLBREW_LIB
    __perlbrew_set_path
	}

	perlbrew () {
    exit_status=
    short_option=
    export SHELL

    if [[ $1 == -* ]]; then
        short_option=$1
        shift
    else
        short_option=""
    fi

    case $1 in
        (use)
            if [[ -z "$2" ]] ; then
                echo -n "Currently using ${PERLBREW_PERL:-system perl}"
                [ -n "$PERLBREW_LIB" ] && echo -n "@$PERLBREW_LIB"
                echo
            else
                __perlbrew_set_env "$2" && { __perlbrew_set_path ; true ; }
                exit_status="$?"
            fi
            ;;

        (switch)
              if [[ -z "$2" ]] ; then
                  command perlbrew switch
              else
                  perlbrew use $2 && { __perlbrew_reinit $2 ; true ; }
                  exit_status=$?
              fi
              ;;

        (off)
            __perlbrew_deactivate
            echo "perlbrew is turned off."
            ;;

        (switch-off)
            __perlbrew_deactivate
            __perlbrew_reinit
            echo "perlbrew is switched off."
            ;;

        (*)
            command perlbrew $short_option "$@"
            exit_status=$?
            ;;
    esac
    hash -r
    return ${exit_status:-0}
	}

	[[ -z "${PERLBREW_ROOT:-}" ]] && export PERLBREW_ROOT="$HOME/perl5/perlbrew"
	[[ -z "${PERLBREW_HOME:-}" ]] && export PERLBREW_HOME="$HOME/.perlbrew"

	if [[ ! -n "${PERLBREW_SKIP_INIT:-}" ]]; then
		if [[ -f "${PERLBREW_HOME:-}/init" ]]; then
        . "$PERLBREW_HOME/init"
		fi
	fi

	if [[ -f "${PERLBREW_ROOT:-}/bin/perlbrew" ]]; then
		perlbrew_command="${PERLBREW_ROOT:-}/bin/perlbrew"
	else
		perlbrew_command="perlbrew"
	fi

	__perlbrew_activate
   ```
   
2. Put somewhere in your `$PATH` a file named `useperlbrew` with the
   following contents:
   
   ```sh
   #!/bin/sh

	# perlbrew
	. $HOME/perl5/perlbrew/etc/kshrc
	perlbrew use perl-5.36.3
	export LD_LIBRARY_PATH=$LD_LIBRARY_PATH:$HOME/perl5/perlbrew/perls/perl-5.36.3/lib
   ```
   
As can be seen, the files above assume `perlbrew` v0.98 and
`perl-5.36.3`. Adapt.  These two files allow to initialize a perlbrew
session as follows:

```sh
. useperlbrew
```

Remember to intall `cpanm`:

```sh
perlbrew install-cpanm
```

biber
-----

0. Prerequisite: `XSLT C Library`. Do as root:

	```sh
	pkg_add libxslt
	```

1. Clone the git repository of `biber`:

	```sh
	git clone https://github.com/plk/biber.git
	```
	
2. Proceed with the installation of `biber` as described in the
   [documentation available on
   CTAN](http://mirrors.ctan.org/biblio/biber/base/documentation/biber.pdf#subsection.4.4):
   
   ```sh
   cd biber
   git checkout vX.YY # eg. v2.20 for biber 2.20
   
   cpanm Module::Build
   perl Build.PL
   ./Build installdeps
   ./Build install
   ```

3. Now build and install `PAR::Packer`:

	```sh
	cpanm PAR::Packer
	```
	
4. Finally, build `biber` executable for OpenBSD as follows:

	```sh
	mkdir dist/openbsd_amd64 && cd dist/openbsd_amd64
	```
	
	Add in this directory a new file named `build.sh` with the
    following contents:
	
	```sh
	#!/bin/sh

	PAR_VERBATIM=1 pp \
		--module=deprecate \
		--module=BibTeX::Parser \
		--module=Text::BibTeX \
		--module=Biber::Input::file::bibtex \
		--module=Biber::Input::file::biblatexml \
		--module=Biber::Output::dot \
		--module=Biber::Output::bbl \
		--module=Biber::Output::bibtex \
		--module=Biber::Output::biblatexml \
		--module=Pod::Simple::TranscodeSmart \
		--module=Pod::Simple::TranscodeDumb \
		--module=List::MoreUtils::XS \
		--module=List::SomeUtils::XS \
		--module=List::MoreUtils::PP \
		--module=HTTP::Status \
		--module=HTTP::Date \
		--module=Encode:: \
		--module=File::Find::Rule \
		--module=IO::Socket::SSL \
		--module=IO::String \
		--module=PerlIO::utf8_strict \
		--module=Text::CSV_XS \
		--module=DateTime \
		--addfile="../../data/biber-tool.conf;lib/Biber/biber-tool.conf" \
		--addfile="../../data/schemata/config.rnc;lib/Biber/config.rnc" \
		--addfile="../../data/schemata/config.rng;lib/Biber/config.rng"\
		--addfile="../../data/schemata/bcf.rnc;lib/Biber/bcf.rnc" \
		--addfile="../../data/schemata/bcf.rng;lib/Biber/bcf.rng" \
		--addfile="../../lib/Biber/LaTeX/recode_data.xml;lib/Biber/LaTeX/recode_data.xml" \
		--addfile="../../data/bcf.xsl;lib/Biber/bcf.xsl" \
		--addfile="$HOME/perl5/perlbrew/perls/perl-5.36.3/lib/libbtparse.so;../libbtparse.so" \
		--cachedeps=scancache \
		--output=biber-openbsd \
		../../bin/biber
	```
	
5. Finally, to produce `biber-openbsd`, make `build.sh` executable and
   run it:
   
   ```sh
   chmod +x build.sh
   ./build.sh
   ```