java-bleh.rb

gistfile1.txt

node.default['java']['install_flavor'] = 'oracle' # ugh
node.default['java']['jdk_version'] = '7'
node.default['java']['accept_license_agreement'] = true
node.default['java']['oracle']['accept_oracle_download_terms'] = true

## Mission: install oracle's java, because cassandra prefers it.
##
## Problem: esl-erlang depends on "default-jre-headless" (openjdk)
##          but that conflicts with oracle's java packages, so we can't
##          just remove openjdk, as it takes esl-erlang with it.
##
## "Solution":
##
## 1) remove all the openjdk packages without removing breaking-deps
##    (this leaves esl-erlang installed, but with unsatisfied deps on java) 
##
## 2) create and install a dummy package called "default-jre-headless"
##    (this satisfies apt dependencies of esl-erlang, apt is happy)
##
## 3) install the oracle java packages
##    since they provide the same jvm stuff as openjdk, no one notices.
##
## Note that ESL's more recent erlang packages for R16 onwards are split in 
## the debian style, into lots of small packages. Once we upgrade to R16+ we
## can just install the erlang packages we need, ie the ones without a java dep
##
package "equivs"

script "remove openjdk gubbins (but leave deps alone)" do
    interpreter "bash"
    not_if "test -f /tmp/.java_hack_applied"
    code <<-EOF
dpkg -r --force-depends \
    icedtea-6-jre-cacao \
    icedtea-6-jre-jamvm \
    openjdk-6-jre-lib \
    default-jre-headless \
    openjdk-6-jre-headless \
    ca-certificates-java
EOF
    user "root"
end
p = "default-jre-headless"

script "install_fake_default-jre-headless" do
    not_if "test -f /tmp/.java_hack_applied"
    not_if "dpkg -s #{p}"
    interpreter "bash"
    code <<-EOF
cd /tmp
echo "Section: interpreters
Priority: optional
Standards-Version: 3.6.2

Package: #{p}
Version: 1:99
Maintainer: RJ <rj@metabrew.com>
Provides: #{p}
Description: fake #{p} package
 to pretend #{p} is installed for apts sake (we use oracle pkgs)" > #{p}

equivs-build #{p}
dpkg -i ./#{p}*.deb
rm ./#{p}*.deb
echo "devops happened here.." > /tmp/.java_hack_applied
EOF
end

include_recipe "java"

Thanks - used it to derive a sh script for my needs to solve a similar problem.