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https://issues.apache.org/jira/browse/COUCHDB-2615?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14387480#comment-14387480
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Robert Kowalski commented on COUCHDB-2615:
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with "pin" i mean documenting one version that is required to build couch from
source, like spidermonkey or sphinx
> Ensure that rebar exists and his version is correct
> ---------------------------------------------------
>
> Key: COUCHDB-2615
> URL: https://issues.apache.org/jira/browse/COUCHDB-2615
> Project: CouchDB
> Issue Type: Improvement
> Security Level: public(Regular issues)
> Components: Build System
> Reporter: Alexander Shorin
> Priority: Blocker
> Fix For: 2.0.0
>
>
> Currently, we relay on the fact that rebar is installed somehow in the system
> before user runs ./configure. This causes the following issues:
> - rebar may actually not being available
> - rebar version may be too old
> To avoid these issues and make install process more "relaxed", on ./configure
> phare we could build rebar before fetch any dependencies. Hopefully, we have
> [own fork|https://git-wip-us.apache.org/repos/asf?p=couchdb-rebar.git] to not
> depend on remote upstream.
> However, it's not wise to always build our own rebar on ./configure - on the
> end user system there could be already installed rebar with the right
> version. For this case, we need to provide a switch flag like
> --with-system-rebar for ./configure script which check if the system rebar
> version is correct (iirc, we need 2.3.1+, but need to double check that).
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