Add var/set_default_env and use it in all build scripts

#!/bin/sh

set -e

rootdir=$(pwd)

#!/bin/bash

[% c("var/set_default_env") -%]

distdir=/var/tmp/dist/binutils

[% IF c("var/linux") %]

  # Config options for hardening-wrapper

#!/bin/bash

set -e

[% c("var/set_default_env") -%]

tar xf [% project %]-[% c("version") %].tar.gz

mv [% project %]-[% c("version") %] [% project %]

[% c('tar', {

#!/bin/bash

set -e

rootdir=$(pwd)

[% c("var/set_default_env") -%]

distdir=/var/tmp/dist/[% project %]

mkdir -p /var/tmp/build

tar -C /var/tmp/build -xf [% project %]-[% c('version') %].tar.gz

#!/bin/bash

set -e

[% c("var/set_default_env") -%]

[% FOREACH lang = c('var/locales') %]

[% SET lang = tmpl(lang) %]

#!/bin/bash

set -e

rootdir=$(pwd)

[% c("var/set_default_env") -%]

[% IF c("var/windows") -%]

  mkdir -p /var/tmp/dist

  tar -C /var/tmp/dist -xf $rootdir/[% c('input_files_by_name/gcc') %]

distdir=/var/tmp/dist/[% project %]

mkdir -p /var/tmp/build

export SHELL=/bin/bash

export HOME=$rootdir

export TZ=UTC

export LC_ALL=C

umask 0022

[% IF c("var/linux") %]

tar xf $rootdir/[% c('input_files_by_name/binutils') %]

export PATH="/var/tmp/dist/binutils/bin:$PATH"