script to help docker to singularity conversion

src/singularity_modules/docker_to_singularity.sh

+# install spython
+# sudo pip3 install spython
+
+find src/docker_modules/ -name "Dockerfile" | \
+  perl -pe "s/docker/singularity/g" | \
+  perl -pe "s/Dockerfile//g" | \
+  awk '{system("mkdir -p " $0)}'
+
+find src/docker_modules/ -name "Dockerfile" | \
+  perl -pe "s/(^.*$)/spython recipe \1 > \1/g" | \
+  perl -pe "s/(^.*)docker_modules(.*$)/\1singularity_modules\2/g" | \
+  perl -pe "s/(^.*\/([^\/]*)\/[^\/]*\/)Dockerfile$/\1\2.def/g" | \
+  awk '{system($0)}'