Revised patch: seeking seconds

[Ximin Luo]

Sean Whitton:
> diff --git a/policy/ch-source.rst b/policy/ch-source.rst
> index 127b125..cc4b020 100644
> --- a/policy/ch-source.rst
> +++ b/policy/ch-source.rst
> @@ -661,6 +661,22 @@ particularly complex or unintuitive source layout or build system (for
>  example, a package that builds the same source multiple times to
>  generate different binary packages).
>  
> +Reproducibility
> +---------------
> +
> +Packages should build reproducibly, which for the purposes of this
> +document [#]_ means that given
> +
> +- a version of a source package unpacked at a given path;
> +- a set of versions of installed build dependencies;
> +- a set of environment variable values; and
> +- a build architecture,
> +
> +repeatedly building the source package on any machine of the same
> +architecture with those versions of the build dependencies installed
> +and exactly those environment variable values set will produce
> +bit-for-bit identical binary packages.
> +

To echo dkg and others' comments, it would be nice if we could add here:

+Packages are encouraged to produce bit-for-bit identical binary packages even
+if most environment variables and build paths are varied. This is technically
+more difficult at the time of writing, but it is intended that this stricter
+definition would replace the above one, when appropriate in the future.

If this type of "intent" wording is not appropriate for Policy then disregard what I'm saying, I don't wish to block this patch for this reason.

>  .. [#]
>     See the file ``upgrading-checklist`` for information about policy
>     which has changed between different versions of this document.
> @@ -790,3 +806,7 @@ generate different binary packages).
>     often creates either static linking or shared library conflicts, and,
>     most importantly, increases the difficulty of handling security
>     vulnerabilities in the duplicated code.
> +
> +.. [#]
> +   This is Debian's precisification of the `reproducible-builds.org
> +   definition <https://reproducible-builds.org/docs/definition/>`_.
> 

"precisification" -> "more precise version"

X

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