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first round of documentation for DUART28C boot control addition
author Mychaela Falconia <falcon@freecalypso.org>
date Wed, 16 Sep 2020 06:10:39 +0000
parents 0a01e1c4ea54
children
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1 It has been brought to the Mother's attention that some people don't like the
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2 way our FC host tools are designed to be installed under /opt/freecalypso as
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3 opposed to some standard location like /usr/local, and that some people have
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4 been patching our Makefiles and code to move our installed binaries (and perhaps
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5 some of the support files as well) to other locations which they like better.
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6
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7 PLEASE DON'T DO IT, especially if you are making a package or a build or setup
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8 or install script to be used by more than just you. FC host tools are a very
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9 complex package with a lot of interrelations between different tools, many
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10 tools in our suite internally invoke other tools by their /opt/freecalypso/bin
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11 absolute pathnames, some tools are designed to be invoked both by human users
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12 and by other tools (rvinterf is a prime example), and there are many support
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13 files used by various tools. If you try to outsmart the Mother and change the
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14 install location to something other than what I designed it to be, you will
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15 inevitably break something, and you probably won't notice the breakage because
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16 a typical casual user only uses a very small subset of our tools. Furthermore,
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17 if you move the install location, you will certainly break our various
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18 additional tools which are not included in the core FC host tools package but
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19 are meant to be installed on top of it, as all of them expect and require the
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20 /opt/freecalypso directory hierarchy described in doc/opt-freecalypso-tree.
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21
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22 If your goal is to have our installed binaries accessible with a standard PATH
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23 without adding /opt/freecalypso/bin to it, the correct solution is to list the
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24 binaries installed in /opt/freecalypso/bin and make a symlink to each of these
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25 binaries from /usr/bin or from /usr/local/bin or from wherever you like. Use
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26 symlinks, don't move the binaries themselves! If you move the actual binaries,
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27 you will break those tools which internally invoke other tools, which we do a
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28 lot.
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29
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30 If you still dislike the whole idea, consider the way Firefox does it: official
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31 release binaries from Mozilla are meant to be installed under /usr/lib/firefox
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32 or /usr/lib/firefox-$VERSION, the stuff inside that directory looks nothing like
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33 FHS, it is private to Firefox just like our /opt/freecalypso directory hierarchy
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34 is private to FreeCalypso, and the user makes one symlink from /usr/bin/firefox
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35 to /usr/lib/firefox-$VERSION/firefox or wherever the full complex package
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36 resides. If you can live with Firefox and other major application packages
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37 having their own non-FHS private directory trees, you can surely live with
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38 FreeCalypso doing the same.
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39
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40 Why did we make our prefix /opt/freecalypso and not /usr/lib/freecalypso or
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41 /usr/local/freecalypso? Because there are many, many places where the full
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42 absolute pathname needs to be typed, and the location we chose is the shortest
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43 among other sensible options.
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44
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45 Anyone who is going to make binary packages of our FC host tools (presumably
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46 for use on systems on which compilation from source is difficult) and wishes to
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47 have their packaging officially endorsed by the upstream MUST follow these
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48 guidelines:
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49
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50 * The complete set of tools and support files MUST be included as if one built
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51 and installed our package from the official source, without omitting or
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52 breaking any part which you might consider unimportant.
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53
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54 * Everything MUST be installed under /opt/freecalypso exactly as designed by
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55 the Mother; symlinks to binaries under /opt/freecalypso/bin from a more user-
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56 friendly location may optionally be included.