Earthly

Maybe not canonical.. But works rather well..

# Its mostly used for go programs that reach private repositories.
# Call example:
# DO commons+CONFIGURE_GITHUB --GITHUB_AUTH=ssh
# DO commons+CONFIGURE_GITHUB --GITHUB_AUTH=plain
CONFIGURE_GITHUB:
    FUNCTION
    ARG GITHUB_AUTH=ssh
    ENV GITHUB_AUTH=$GITHUB_AUTH
    IF [ "$GITHUB_AUTH" = "plain" ]
        RUN git config --global credential.helper '!p() { printf "username=${GIT_USER}\\npassword=${GIT_PASS}"; }; p'
    ELSE
        RUN git config --global url."<ssh://git@github.com/>".insteadOf <https://github.com/>
        RUN mkdir -p -m 0600 ~/.ssh &amp;&amp; ssh-keyscan <http://github.com|github.com> &gt;&gt; ~/.ssh/known_hosts
    END

# Set all env parameters needed for GO applications, also set up caches to make things faster
# Call example:
# DO commons+KTB_GO_PREPARE
KTB_GO_PREPARE:
    FUNCTION
    ENV GOCACHE=/go-cache
    ENV GOMODCACHE=/go-mod-cache
    ENV GOPRIVATE=<http://github.com/kentik|github.com/kentik>
    CACHE --sharing=shared --id=kbt_go_cache $GOCACHE
    CACHE --sharing=shared --id=kbt_go_mod_cache $GOMODCACHE

# Run FUNCTION with github configured
# Its mostly used for go programs that reach private repositories.
# Call example:
# DO commons+GO_WITH_GITHUB --cmd="go build"
GO_WITH_GITHUB:
    FUNCTION
    DO +KTB_GO_PREPARE
    ARG --required cmd
    ARG DESTDIR=/build/output
    ARG DEBUG_PIPELINE=false
    ARG GO_TEST_FLAGS
    IF [ "$GITHUB_AUTH" = "plain" ]
        RUN --secret GIT_USER=GITHUB_USER --secret GIT_PASS=GITHUB_TOKEN \
            eval $cmd
    ELSE
        RUN --ssh eval $cmd
    END```

Anyone have a canonical example of building Go with support for mount caching the GOCACHE and GOMODCACHE?