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To be more generic and recognizable, the `README-pipeline.md' script was
renamed to `README-hacking.md'. In essence, it is just that: to hack the
existing pipeline for your own project. We follow a similar naming
convention in many GNU software.
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Two corrections were made in the Git hooks of Metastore.
1) The shebang at the start of the scripts now uses the absolute adress of
our installed bash, not the relative `.local/bin/bash'. Note that it is
possible to use Git within subdirectories and in that scenario, the
`.local' will fail.
2) The `$$user' section was removed from the command to find the user's
group. With the user as an argument, `groups' may print the user's name
first, then their list of groups. When this happens, the script would
be just repeating the user's name. But the raw `groups' command will
list the groups of the running user.
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Until now, the check to see if the patchelf program should be used or not
(for GNU/Linux vs. Mac installations) was mistakenly added over the step
that we define the `sh' symbolic link, not over the call to patchelf. This
is corrected with this commit.
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In this version, too many extra notices (just regarding a change from
branch to branch) are not printed with `-q'. Instead only a one line
statement is printed that it is saved or applied.
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Until we see what happens with the pull request of our suggested features
in metastore, its version isn't written directly into the executable, so we
won't actually check it, but write the version directly into the paper.
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After testing the built of Metastore on a server, I noticed that because
its `/etc/passwd' doesn't have the list of users, the `getpwuid' call
within metastore failed and wouldn't let it finish.
So I looked into the code and was able to implement a solution to this
problem by adding two options to it for default values for the user and
group. Also, file attributes are not necessary in our (current) use case of
metastore and caused crashes on our server, so they are also disabled.
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Metastore depends on `bsd/string.h' to work properly (atleast on GNU/Linux
systems). The first system I tried building with had that library, so I
didn't notice! With this commit, we also build `libbsd' as part of the
pipeline.
Also, I couldn't find libbsd's version in any of its installed headers, so
like Libjpeg, we can't actually check and will directly write our internal
version into the paper.
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The pipeline heavily depends on file meta data (and in particular the
modification dates), for example the configuration-Makefiles within the
pipeline are set as prerequisites to the rules of the pipeline.
However, when Git checks out a branch, it doesn't preserve the meta-data of
the files unique to that branch (for example program source files or
configuration-Makefiles). As a result, the rules that depend on them will
be re-done.
This is especially troublesome in the scenario of this reproducible paper
project because we commonly need to switch between branches (for example to
import recent work in the pipeline into the projects). After some
searching, I think the Metastore program is the best solution. Metastore is
now built as part of the pipeline and through two Git hooks, it is called
by Git to store the original meta-data of files into a binary file that is
version controlled (and managed by Metastore).
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