We could think of the following use cases:
1. User installs git-extras from official port/pkg. man/man* structure
is quite common among different systems, but location of man/ itself can
be different. FreeBSD Ports framework setups MANPREFIX to PREFIX by
default, i.e. it's /usr/local. The idea is that software may provide
different man/man* sections, with final path being /usr/local/man/man*.
In contrast, git-extras' Makefile process simplifies the things due to
it works with section 1 only, and expects MANPREFIX to be set down to
man/man1 path. For this reason, installation via FreeBSD Ports requires
unconditional man path configuration like this:
ifeq ($(OS), FreeBSD)
MANPREFIX = "$(PREFIX)/man/man1"
Otherwise, the path will be incorrect. And this is how official FreeBSD
port of git-extras has been fixing this difference for many years.
2. End user installs git-extras manually. There are two sub-cases:
2.a. User explicitly defines custom MANPREFIX. Okay, it's user's
decision -- nothing to do here, just follow as is.
2.b. User does not define custom paths, i.e. it's expected to be
installed according to FreeBSD defaults. And default values in
git-extras' Makefile forms the expected correct path.
This change supports all the cases above, with the goal to avoid wrong
man path for the most of the situations. As long as official git-extras
make process tries to support FreeBSD, this change allows to omit extra
patching for FreeBSD Ports framework.
If a bash_completion file should get lazy loaded and is placed in a none standard directory which is listed in XDG_DATA_DIRS it must be placed under share/bash-completion/completions. This is for example used in home-manager.
See 730368b35a/bash_completion (L2531)
The two methods build slightly different manual pages.
The Makefile based version has better headers so use it.
Automatically generate git-extras.md and index.txt when building docs.
Broken in 67241a46a8
`mktemp` for BSD (including OSX) requires a template, but it allows any number
of `X`s in the template.
(GNU) `mktemp` for Linux does not require a template, however, if a template is
specified, then the number of `X`s must be 6.
See http://unix.stackexchange.com/a/206111/117157
