add bash script to install packages on non-Linux systems

*BSD systems are currently supported and macOS actually tested.

Ref: https://github.com/mxe/mxe/issues/1708

1 files changed, 165 insertions, 0 deletions

diff --git a/tools/mxe-get b/tools/mxe-get
new file mode 100755
index 0000000..f1cdb9f
--- /dev/null
+++ b/tools/mxe-get
@@ -0,0 +1,165 @@
+#!/usr/bin/env bash
+
+# The MIT License (MIT)
+# =====================
+#
+# Copyright (c) 2017 Viktor Szakats <https://vszakats.net/>
+#
+# Permission is hereby granted, free of charge, to any person obtaining
+# a copy of this software and associated documentation files (the
+# "Software"), to deal in the Software without restriction, including
+# without limitation the rights to use, copy, modify, merge, publish,
+# distribute, sublicense, and/or sell copies of the Software, and to
+# permit persons to whom the Software is furnished to do so, subject to
+# the following conditions:
+#
+# The above copyright notice and this permission notice shall be included
+# in all copies or substantial portions of the Software.
+#
+# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+# EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+# MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
+# IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
+# CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
+# TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
+# SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+
+set -ue
+
+usage() {
+  echo "Download and unpack a list of MXE binary packages along with their
+dependencies, securely.
+
+Usage: $(basename "$0") [package ...]
+
+Environment:
+
+MXE_HOME          Configure directory where packages will be installed.
+                  Default: ~/mxe
+MXE_DONT_INSTALL  Comma/space separated list of package names to skip
+                  installing. Useful to exclude unnecessary dependencies.
+                  *-linux-gnu-*, mxe-requirements, mxe-source packages
+                  are excluded automatically.
+
+Required: ar (BSD), gpg (2.x), curl, openssl, awk, sed, tar, gzip
+
+Author: Viktor Szakats <https://vszakats.net/>"
+}
+
+mxe_curl() {
+  curl -fsS --connect-timeout 15 --retry 3 "$@"
+}
+
+mxe_get_pkg() {
+
+  if [[ "$1" =~ ^(mxe-(i686|x86\-64)-(w64|unknown)-(mingw32|linux-gnu)(\.shared|\.static)?)-(.*)$ ]]; then
+
+    repo="${BASH_REMATCH[1]}"  # mxe-x86-64-w64-mingw32.shared
+    plat="${BASH_REMATCH[4]}"  # mingw32 | linux-gnu
+    name="${BASH_REMATCH[6]}"  # harfbuzz
+
+    # skip native packages
+    if [ ! "${plat}" = 'linux-gnu' ]; then
+
+      # skip packages on the don't install list
+      if [[ ! "${name}" =~ ^("${MXE_DONT_INSTALL//[, ]/|}")$ ]]; then
+
+        idid="${repo}-${name}"  # package id for internal purposes
+        if [[ ! "${done}" = *"|${idid}|"* ]]; then  # avoid installing the same package twice
+          done="${done} |${idid}|"  # add to list of install packages
+
+          ctrl="$(awk "/^Package: ${repo}-${name}$/,/^SHA256: /" Packages)"  # control section for this package
+
+          debp="$(echo "${ctrl}" | sed -n -E 's,^Filename: (.+)$,\1,p')"  # .deb path
+          vers="$(echo "${ctrl}" | sed -n -E 's,^Version: (.+)$,\1,p')"  # package version
+          hash="$(echo "${ctrl}" | sed -n -E 's,^SHA256: ([0-9a-fA-F]{64})$,\1,p')"  # .deb hash
+          deps="$(echo "${ctrl}" | sed -n -E 's,^Depends: (.+)$,\1,p')"  # .deb dependencies
+
+          echo "! Version: ${vers}"
+          url="${base}/${debp}"
+          echo "! Downloading... '${url}'"
+          if mxe_curl "${url}" -o pack.bin; then
+
+            hash_fl="$(openssl dgst -sha256 pack.bin \
+              | sed -n -E 's,.+= ([0-9a-fA-F]{64}),\1,p')"
+
+            if [ "${hash_fl}" = "${hash}" ]; then
+              if ar -x pack.bin data.tar.xz && \
+                 tar --strip-components 4 -xf data.tar.xz; then
+                subd="$(echo "$(pwd)/usr/${repo}" \
+                  | sed -e 's|^mxe-||' -e 's|x86-64|x86_64|' -e "s|${HOME}|~|")"
+                echo "! Verified OK. Unpacked into: '${subd}'"  # ~/mxe/usr/mxe-x86_64-w64-mingw32.shared
+              else
+                echo "! Error: Unpacking: '${url}'"
+              fi
+              rm -f data.tar.xz
+            else
+              echo "! Error: Verifying package checksum: '${url}'"
+              echo "!        Expected: ${hash}"
+              echo "!          Actual: ${hash_fl}"
+            fi
+            rm -f pack.bin
+
+            for i in ${deps//,/}; do
+              mxe_get_pkg "$i"  # recurse
+            done
+          else
+            echo "! Error: Cannot find file in file list: '${repo}-${name}_*'"
+          fi
+        fi
+      fi
+    fi
+  elif [ ! "$1" = 'mxe-requirements' ] && \
+       [ ! "$1" = 'mxe-source' ]; then
+    echo "! Error: Cannot parse package name: '$1'"
+  fi
+}
+
+if [ $# -eq 0 ]; then
+  usage
+  exit
+fi
+
+[ -z "${MXE_DONT_INSTALL+x}" ] && MXE_DONT_INSTALL='gcc'
+[ -z "${MXE_HOME+x}" ] && MXE_HOME="${HOME}/mxe"
+
+mkdir -p "${MXE_HOME}"
+(
+  cd "${MXE_HOME}" || exit
+
+  # APT root
+  base='http://pkg.mxe.cc/repos/apt/debian'
+
+  alias gpg='gpg --batch --keyserver-options timeout=15 --keyid-format LONG'
+
+  echo "! Downloading and verifying MXE package list..."
+  mxe_curl \
+    -O "${base}/dists/wheezy/Release.gpg" \
+    -O "${base}/dists/wheezy/Release"
+  gpg -q --keyserver hkps://keyserver.ubuntu.com --recv-keys 'D43A795B73B16ABE9643FE1AFD8FFF16DB45C6AB'
+  gpg --verify-options show-primary-uid-only --verify Release.gpg Release || exit 1
+  mxe_curl \
+    -O "${base}/dists/wheezy/main/binary-amd64/Packages.gz"
+  openssl dgst -sha256 Packages.gz \
+  | grep -q "$(sed -E -n 's,^ ([0-9a-fA-F]{64}) [0-9]* main/binary-amd64/Packages.gz$,\1,p' Release)" || exit 1
+  gzip -f -d Packages.gz
+
+  echo "! Downloading and verifying MXE package(s)..."
+  done=''
+  while [ $# -gt 0 ]; do
+    echo "! Installing MXE package '$1'"
+    mxe_get_pkg "$1"
+    shift
+  done
+  echo "! Installed:${done//|/}"
+
+  if [ -n "${done}" ]; then
+    echo '! Retargeting symlinks...'
+    find . -type l -name '*' | while IFS= read -r f; do
+      # TOFIX: readlink may need to be adapted for non-macOS systems
+      ln -f -s "$(readlink "${f}" | sed "s|/usr/lib/mxe|$(pwd)|")" "${f}"
+    done
+  fi
+
+  echo '! Done.'
+)