Add release preparation script

contrib/prepare_release.sh

@@ -0,0 +1,60 @@
+#!/bin/sh
+# script to prepare binaries and source tarballs for a Julia release
+# aka "bucket dance" julianightlies -> julialang
+set -e # stop on failure
+cd "$(dirname "$0")"/.. # run in top-level directory
+
+shashort=$(git rev-parse --short=10 HEAD)
+tag=$(git tag --points-at $shashort)
+if [ -z "$tag" ]; then
+  echo "error: this script must be run with a tagged commit checked out" >&2
+  exit 1
+fi
+version=$(cat VERSION)
+majmin=$(cut -d. -f1-2 VERSION)
+if [ "$tag" != "v$version" ]; then
+  echo "error: tagged commit does not match content of VERSION file" >&2
+  exit 1
+fi
+
+# create full-source-dist and light-source-dist tarballs from a separate
+# clone to ensure the directory name in them is julia-$version
+git clone https://github.com/JuliaLang/julia -b $tag julia-$version
+cd julia-$version
+make full-source-dist
+make light-source-dist
+mv julia-${version}_$shashort-full.tar.gz ../julia-$version-full.tar.gz
+mv julia-${version}_$shashort.tar.gz ../julia-$version.tar.gz
+cd ..
+rm -rf julia-$version
+
+# download and rename binaries, with -latest copies
+julianightlies="https://s3.amazonaws.com/julianightlies/bin"
+curl -L -o julia-$version-linux-x86_64.tar.gz \
+  $julianightlies/linux/x64/$majmin/julia-$version-$shashort-linux64.tar.gz
+cp julia-$version-linux-x86_64.tar.gz julia-$majmin-latest-linux-x86_64.tar.gz
+curl -L -o julia-$version-linux-i686.tar.gz \
+  $julianightlies/linux/x86/$majmin/julia-$version-$shashort-linux32.tar.gz
+cp julia-$version-linux-i686.tar.gz julia-$majmin-latest-linux-i686.tar.gz
+curl -L -o "julia-$version-osx10.7 .dmg" \
+  $julianightlies/osx/x64/$majmin/julia-$version-$shashort-osx.dmg
+cp "julia-$version-osx10.7 .dmg" "julia-$majmin-latest-osx10.7 .dmg"
+curl -L -o julia-$version-win64.exe \
+  $julianightlies/winnt/x64/$majmin/julia-$version-$shashort-win64.exe
+cp julia-$version-win64.exe julia-$majmin-latest-win64.exe
+curl -L -o julia-$version-win32.exe \
+  $julianightlies/winnt/x86/$majmin/julia-$version-$shashort-win32.exe
+cp julia-$version-win32.exe julia-$majmin-latest-win32.exe
+
+shasum -a 256 julia-$version* | grep -v sha256 | grep -v md5 > julia-$version.sha256
+md5sum julia-$version* | grep -v sha256 | grep -v md5 > julia-$version.md5
+
+gpg -u julia --armor --detach-sig julia-$version-full.tar.gz
+gpg -u julia --armor --detach-sig julia-$version.tar.gz
+gpg -u julia --armor --detach-sig julia-$version-linux-x86_64.tar.gz
+gpg -u julia --armor --detach-sig julia-$version-linux-i686.tar.gz
+
+echo "All files prepared. Attach julia-$version.tar.gz and julia-$version-full.tar.gz"
+echo "to github releases, upload all binaries and checksums to julialang S3. Be sure"
+echo "to set all S3 uploads to publicly readable, and replace $majmin-latest binaries."
+# TODO: also automate uploads via aws cli and github api?