defa1dc38a
I was trying a `--ex-unified-core` compose of FAW, and things fell over on `urw-base35-fonts` which does a dance of setting a stamp file in `%post` and checking it in `%posttrans`. This whole pattern should be considered deprecated by file triggers. But let's support it for now. Note there's a lot of parameter passing as we need a single directory which is held across multiple script invocations. Closes: #1319 Approved by: jlebon