Detect binary gems in your bundle programmatically

output.sh

bundle package  # downloads all .gem files in your bundle to vendor/cache

# use gem spec A.gem extensions to print the extensions property in the gemspec
for i in `ls vendor/cache`; do echo $i; gem spec vendor/cache/$i extensions; done

CFPropertyList-2.3.0.gem
--- []

Platform-0.4.0.gem
--- []

acts_as_list-0.1.9.gem
--- []

acts_as_tree-2.1.0.gem
--- []

addressable-2.3.7.gem
--- []

akami-1.2.2.gem
--- []

american_date-1.1.0.gem
--- []

amq-protocol-1.9.2.gem
--- []

ancestry-1.2.5.gem
--- []

angularjs-rails-1.2.4.gem
--- []

apipie-bindings-0.0.12.gem
--- []

arel-3.0.3.gem
--- []

awesome_print-1.6.1.gem
--- []

awesome_spawn-1.3.0.gem
--- []

aws-sdk-1.56.0.gem
--- []

aws-sdk-v1-1.56.0.gem
--- []

bcrypt-ruby-3.0.1.gem
---
- ext/mri/extconf.rb

binary_struct-2.0.0.gem
--- []

brakeman-2.6.3.gem
--- []

builder-3.0.4.gem
--- []

bunny-1.0.7.gem
--- []

camcorder-0.0.2.gem
--- []

capybara-2.1.0.gem
--- []

color-1.7.1.gem
--- []

commonjs-0.2.7.gem
--- []

crack-0.4.2.gem
--- []

daemons-1.2.2.gem
--- []

dalli-2.2.1.gem
--- []

default_value_for-2.0.3.gem
--- []

diff-lcs-1.2.5.gem
--- []

elif-0.1.0.gem
--- []

erubis-2.7.0.gem
--- []

eventmachine-1.0.7.gem
---
- ext/extconf.rb
- ext/fastfilereader/extconf.rb

excon-0.44.3.gem
--- []

execjs-2.3.0.gem
--- []

ezcrypto-0.7.gem
--- []

facade-1.0.6.gem
--- []

factory_girl-4.1.0.gem
--- []

fast_gettext-0.9.2.gem
--- []

fastercsv-1.5.5.gem
--- []

ffi-1.9.6.gem
---
- ext/ffi_c/extconf.rb

ffi-vix_disk_lib-1.0.1.gem
--- []

fission-0.5.0.gem
--- []

fog-1.28.0.gem
--- []

fog-atmos-0.1.0.gem
--- []

fog-aws-0.1.1.gem
--- []

fog-brightbox-0.7.1.gem
--- []

fog-core-1.29.0.gem
--- []

fog-ecloud-0.0.2.gem
--- []

fog-json-1.0.0.gem
--- []

fog-profitbricks-0.0.1.gem
--- []

fog-radosgw-0.0.3.gem
--- []

fog-riakcs-0.1.0.gem
--- []

fog-sakuracloud-1.0.0.gem
--- []

fog-serverlove-0.1.1.gem
--- []

fog-softlayer-0.4.1.gem
--- []

fog-storm_on_demand-0.1.0.gem
--- []

fog-terremark-0.0.4.gem
--- []

fog-vmfusion-0.0.1.gem
--- []

fog-voxel-0.0.2.gem
--- []

fog-xml-0.1.1.gem
--- []

formatador-0.2.5.gem
--- []

gettext-3.1.4.gem
--- []

gettext_i18n_rails-1.2.1.gem
--- []

gssapi-1.2.0.gem
--- []

gyoku-1.0.0.gem
--- []

haml-4.0.6.gem
--- []

haml-rails-0.4.gem
--- []

highline-1.6.21.gem
--- []

hike-1.2.3.gem
--- []

httpclient-2.5.3.3.gem
--- []

httpi-2.0.2.gem
--- []

i18n-0.7.0.gem
--- []

inflecto-0.0.2.gem
--- []

inifile-3.0.0.gem
--- []

iniparse-1.3.3.gem
--- []

io-extra-1.2.8.gem
---
- ext/extconf.rb

ipaddress-0.8.0.gem
--- []

jasmine-2.2.0.gem
--- []

jasmine-core-2.2.0.gem
--- []

jbuilder-2.0.8.gem
--- []

journey-1.0.4.gem
--- []

jquery-rails-2.1.4.gem
--- []

json-1.8.2.gem
---
- ext/json/ext/generator/extconf.rb
- ext/json/ext/parser/extconf.rb
- ext/json/extconf.rb

kubeclient-0.1.9.gem
--- []

less-2.6.0.gem
--- []

less-rails-2.6.0.gem
--- []

libv8-3.16.14.7-x86_64-darwin-13.gem
--- []

linux_admin-0.10.0.gem
--- []

little-plugger-1.1.3.gem
--- []

locale-2.1.0.gem
--- []

log4r-1.1.8.gem
--- []

logging-1.6.2.gem
--- []

mail-2.5.4.gem
--- []

memoist-0.11.0.gem
--- []

mime-types-1.25.1.gem
--- []

minitest-4.7.5.gem
--- []

more_core_extensions-1.2.0.gem
--- []

multi_json-1.11.0.gem
--- []

net-ldap-0.7.0.gem
--- []

net-ping-1.7.7.gem
--- []

net-scp-1.2.1.gem
--- []

net-sftp-2.0.5.gem
--- []

net-ssh-2.9.2.gem
--- []

netrc-0.10.3.gem
--- []

nokogiri-1.5.11.gem
---
- ext/nokogiri/extconf.rb

nori-2.1.0.gem
--- []

novnc-rails-0.2.gem
--- []

oauth-0.4.7.gem
--- []

open4-1.3.4.gem
--- []

outfielding-jqplot-rails-1.0.8.gem
--- []

ovirt-0.4.1.gem
--- []

ovirt_metrics-1.0.1.gem
--- []

parallel-0.5.21.gem
--- []

pdf-writer-1.1.8.gem
--- []

pg-0.12.2.gem
---
- ext/extconf.rb

phantomjs-1.9.8.0.gem
--- []

polyglot-0.3.5.gem
--- []

psych-2.0.13.gem
---
- ext/psych/extconf.rb

rack-1.4.5.gem
--- []

rack-cache-1.2.gem
--- []

rack-ssl-1.3.4.gem
--- []

rack-test-0.6.3.gem
--- []

rails-i18n-3.0.1.gem
--- []

rake-10.4.2.gem
--- []

rdoc-3.12.2.gem
--- []

recursive-open-struct-0.6.1.gem
--- []

ref-1.0.5.gem
--- []

rspec-2.14.1.gem
--- []

rspec-bisect-0.0.1.gem
--- []

rspec-core-2.14.8.gem
--- []

rspec-expectations-2.14.5.gem
--- []

rspec-fire-1.3.0.gem
--- []

rspec-mocks-2.14.6.gem
--- []

rspec-rails-2.14.2.gem
--- []

ruby-graphviz-1.2.1.gem
--- []

ruby-prof-0.15.6.gem
---
- ext/ruby_prof/extconf.rb

ruby-progressbar-0.0.10.gem
--- []

ruby2ruby-2.1.3.gem
--- []

ruby_parser-3.5.0.gem
--- []

rubyntlm-0.5.0.gem
--- []

rubyzip-0.9.5.gem
--- []

rufus-lru-1.0.5.gem
--- []

rufus-scheduler-2.0.24.gem
--- []

safe_yaml-1.0.4.gem
--- []

sass-3.1.20.gem
--- []

savon-2.2.0.gem
--- []

secure_headers-2.0.0.gem
--- []

sexp_processor-4.4.5.gem
--- []

shoulda-matchers-1.0.0.gem
--- []

simple-rss-1.3.1.gem
--- []

slim-2.1.0.gem
--- []

snmp-1.1.1.gem
--- []

spice-html5-rails-0.1.5.gem
--- []

sprockets-2.2.3.gem
--- []

sprockets-less-0.6.1.gem
--- []

sprockets-sass-1.2.0.gem
--- []

stackprof-0.2.7.gem
---
- ext/extconf.rb

temple-0.6.10.gem
--- []

terminal-table-1.4.5.gem
--- []

text-1.3.0.gem
--- []

therubyracer-0.12.1.gem
---
- ext/v8/extconf.rb

thin-1.3.1.gem
---
- ext/thin_parser/extconf.rb

thor-0.19.1.gem
--- []

tilt-1.4.1.gem
--- []

timecop-0.7.3.gem
--- []

transaction-simple-1.4.0.2.gem
--- []

treetop-1.4.15.gem
--- []

trollop-1.16.2.gem
--- []

tzinfo-0.3.43.gem
--- []

uglifier-2.4.0.gem
--- []

uuidtools-2.1.5.gem
--- []

vcr-2.9.3.gem
--- []

wasabi-3.1.0.gem
--- []

webmock-1.20.4.gem
--- []

xml-simple-1.0.12.gem
--- []

xpath-2.0.0.gem
--- []