> Well, `docwriter' isn't taken yet on pypi.org, and you wrote that you
> are probably extending it to a more generic package, so I think you
> should stay with that name.
>
OK.
> The file to be modified is `builds/unix/configure.raw', which is a
> shell script that (a) gets processed to `builds/unix/configure.ac' by
> a sed script to replace `@VERSION@' with the FreeType version (this is
> a peculiarity of FreeType's build system), and (b) gets further
> processed by `autoconf', which uses M4 macros to piecewise create a
> `builds/unix/configure' script from templates.
>
> [The M4 quoting character in `configure.ac' is set to `[' and `]';
> these quotes should be added around macro parameters in almost all
> situations; please say `info autoconf' for more details.]
>
> A possible test for a `python' binary is the line
>
> AC_CHECK_PROGS([PYTHON], [python python2 python3], [missing])
>
> which assigns the shell variable $PYTHON to either `python',
> `python2', or `python3' (testing in this order), whatever gets found
> first in the path. If none of those programs is found, $PYTHON is set
> to `missing'. Note that this test also allows
>
> PYTHON=foobar ./configure ...
>
> to override $PYTHON on the command line.
>
> After the above line you can continue with
>
> have_docwriter=no
> if test "x$PYTHON" != "xmissing"; then
> AC_CHECK_PROGS([PIP], [pip2 pip3], [missing])
>
> if test "x$PIP" != "xmissing"; then
> $PIP show -q docwriter
> if test "x$?" = "x0"; then
> have_docwriter=yes
> fi
> fi
> fi
>
> [Actually, if we test for `pip', we don't need a test for python since
> pip doesn't work without python, but I think it looks better.]
>
> At the end of `configure.raw' you can now write
>
> if test have_docwriter = no; then
> AC_MSG_NOTICE([Warning: \`make refdoc' will fail since ...])
> fi
>
> To (re)generate the configure script, say
>
> ./autogen.sh
>
> as usual.
>
Thanks for the explanation and the scripts. Running
./autogen.sh
make
on a clean environment (without docwriter installed) would now give:
(...)
checking for library containing clock_gettime... none required
checking for python... python
checking for pip... pip
configure: creating ./config.status
(...)
configure:
Library configuration:
external zlib: yes (autoconf test)
bzip2: no
libpng: yes (libpng-config)
harfbuzz: no
configure:
Warning: `make refdoc' will fail since pip package `docwriter'
is not installed. To install, run `pip install docwriter', or to
use a python virtual environment, run `make refdoc-venv' (Requires
pip package `virtualenv').
Also, is there a way to store the $PYTHON variable (python/python2/
python3) so that I can use it in `freetype.mk' while invoking docwriter?
--
Nikhil
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