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Ed Morley
ead59ac7ff
In #1011 the number of buildpack variables that are exported (and so exposed to subprocesses) was reduced, since in general we don't want to leak buildpack internals into end-user steps such as the pre/post compile hooks. However since this change, any buildpack metric emitted from within a `sub_env` wrapper (which is a buildpack-stdlib utility function) is missing its `buildpack.python` prefix. This is because buildpack-stdlib: * lazy-loads `BPLOG_PREFIX` (rather than doing so when initially sourced, which is the approach used for `BUILDPACK_LOG_FILE`) * doesn't check whether `BPLOG_PREFIX` is set before emitting metrics See: https://github.com/heroku/buildpack-stdlib/blob/v8/stdlib.sh As a stop-gap until we either fix this in buildpack-stdlib (W-8095466), or remove usages of the `sub_env` wrapper (since I think they are counter-productive in this buildpack), I've added back the export for `BPLOG_PREFIX`. Fixes @W-8095436@.