If you ever feel the need to update dmd for homebrew

brew-patch-dmd.sh

#!/usr/bin/env bash

#
# This is just convenience to make updating dmd for homebrew a one liner (ish)
# You still need to "git commit" the changes and push and make a PR.
#

show_help() {
    echo "usage: $(basename "$0") -f <brew-fork-dir> -v <released-dmd-version>"
}

dmd_version=""
brew_fork=""

while getopts "f:v:" opt; do
    case "$opt" in
    f)
        brew_fork=${OPTARG}
        ;;
    v)  dmd_version=${OPTARG}
        ;;
    *)
        show_help
        ;;
    esac
done

if [[ -z $dmd_version ]]; then
    echo "Must specify which DMD version you want to push"
    show_help
    exit 1
fi

if [[ -z $brew_fork ]]; then
    echo "Must specify directory where your fork of homebrew-core is"
    show_help
    exit 1
fi

if [ ! -f $brew_fork/Formula/dmd.rb ]; then
    echo "Cannot find 'Formula/dmd.rb' in directory $brew_fork"
    show_help
    exit 1
fi

dmd_filename="dmd.tar.gz"
druntime_filename="druntime.tar.gz"
phobos_filename="phobos.tar.gz"
tools_filename="tools.tar.gz"

archive="v$dmd_version.tar.gz"
dmd_url="https://github.com/dlang/dmd/archive/$archive"
druntime_url="https://github.com/dlang/druntime/archive/$archive"
phobos_url="https://github.com/dlang/phobos/archive/$archive"
tools_url="https://github.com/dlang/tools/archive/$archive"

tmp_dir=`mktemp -d`
echo "Downloading DMD files to $tmp_dir"

wget -O "$tmp_dir/$dmd_filename" -q --show-progress $dmd_url
wget -O "$tmp_dir/$druntime_filename" -q --show-progress $druntime_url
wget -O "$tmp_dir/$phobos_filename" -q --show-progress $phobos_url
wget -O "$tmp_dir/$tools_filename" -q --show-progress $tools_url

dmd_sha=`shasum -a 256 $tmp_dir/$dmd_filename | awk '{print $1;}'`
druntime_sha=`shasum -a 256 $tmp_dir/$druntime_filename | awk '{print $1;}'`
phobos_sha=`shasum -a 256 $tmp_dir/$phobos_filename | awk '{print $1;}'`
tools_sha=`shasum -a 256 $tmp_dir/$tools_filename | awk '{print $1;}'`

rm -rf $tmp_dir

read -d '' changes << EOM
stable do
    url "$dmd_url"
    sha256 "$dmd_sha"

    resource "druntime" do
      url "$druntime_url"
      sha256 "$druntime_sha"
    end

    resource "phobos" do
      url "$phobos_url"
      sha256 "$phobos_sha"
    end

    resource "tools" do
      url "$tools_url"
      sha256 "$tools_sha"
    end
  end

  b
EOM
# The weirdness with the lone b above is because I can't figure out how to tell the perl command
# below to INCLUDE the trailing whitespace and newlines when doing the substitution. Consequently,
# the regex below is also "ottle do" instead of the actual "bottle do"

perl -i -p0e "s/stable do.+?(?=ottle do)/${changes//\//\\/}/s" $brew_fork/Formula/dmd.rb