Execute build scripts directly from source

Execute build scripts directly from source

The only meaningful substitutions used by scripts/build are @PERL@
and @PYTHON@. This can be moved to the invocation, getting rid of
many dependencies across directories.

Also contains:
 - Remove unused doc-i18n-root-rules
   lilypond-*.info and index.*.html only exist in Documentation, not
   for every language.

 - Run grand-replace in source directory
   While at it, fix it for Python 3 so that I'm able to test.

[lemzwerg, 2020-04-15 20:08:08]

LGTM, with some nits.

https://codereview.appspot.com/545870043/diff/549860043/make/doc-i18n-root-ru...
File make/doc-i18n-root-rules.make (right):

https://codereview.appspot.com/545870043/diff/549860043/make/doc-i18n-root-ru...
make/doc-i18n-root-rules.make:10: find $(outdir)/$* -name '*.html' | xargs grep
-L 'UNTRANSLATED NODE: IGNORE ME' | sed 's!$(outdir)/!!g' | xargs $(PYTHON)
$(buildscript-dir)/mass-link.py --prepend-suffix .$(ISOLANG) hard $(outdir)
$(top-build-dir)/Documentation/$(outdir)
If you are going to change that please shorten the lines to 80 chars if
possible.

https://codereview.appspot.com/545870043/diff/549860043/scripts/build/help2ma...
File scripts/build/help2man.pl (left):

https://codereview.appspot.com/545870043/diff/549860043/scripts/build/help2ma...
scripts/build/help2man.pl:1: #!@PERL@ -w
Not sure whether this is useful – help2man.pl is not part of LilyPond but gets
imported, so I think it's best if it stays unchanged.  Please check!

https://codereview.appspot.com/545870043/diff/549860043/scripts/build/mf2pt1.pl
File scripts/build/mf2pt1.pl (left):

https://codereview.appspot.com/545870043/diff/549860043/scripts/build/mf2pt1....
scripts/build/mf2pt1.pl:1: #!@PERL@
Again an imported script, which should ideally stay unmodified for easy import
of newer versions.

[hahnjo, 2020-04-15 20:56:28]

On 2020/04/15 20:08:08, lemzwerg wrote:
> LGTM, with some nits.
> 
>
https://codereview.appspot.com/545870043/diff/549860043/make/doc-i18n-root-ru...
> File make/doc-i18n-root-rules.make (right):
> 
>
https://codereview.appspot.com/545870043/diff/549860043/make/doc-i18n-root-ru...
> make/doc-i18n-root-rules.make:10: find $(outdir)/$* -name '*.html' | xargs
grep
> -L 'UNTRANSLATED NODE: IGNORE ME' | sed 's!$(outdir)/!!g' | xargs $(PYTHON)
> $(buildscript-dir)/mass-link.py --prepend-suffix .$(ISOLANG) hard $(outdir)
> $(top-build-dir)/Documentation/$(outdir)
> If you are going to change that please shorten the lines to 80 chars if
> possible.

There are far too many long lines, especially in the docs build. I don't want to
make this change now, it was already complicated enough to test all rules for
this patch.

>
https://codereview.appspot.com/545870043/diff/549860043/scripts/build/help2ma...
> File scripts/build/help2man.pl (left):
> 
>
https://codereview.appspot.com/545870043/diff/549860043/scripts/build/help2ma...
> scripts/build/help2man.pl:1: #!@PERL@ -w
> Not sure whether this is useful – help2man.pl is not part of LilyPond but gets
> imported, so I think it's best if it stays unchanged.  Please check!
> 
>
https://codereview.appspot.com/545870043/diff/549860043/scripts/build/mf2pt1.pl
> File scripts/build/mf2pt1.pl (left):
> 
>
https://codereview.appspot.com/545870043/diff/549860043/scripts/build/mf2pt1....
> scripts/build/mf2pt1.pl:1: #!@PERL@
> Again an imported script, which should ideally stay unmodified for easy import
> of newer versions.

Unfortunately that's not possible. See the (now deleted) explanations in
stepmake/stepmake/help2man-rules.make about Perl's handling of #! lines.
Besides, the original files surely don't have @PERL@ in them, do they?

[hanwenn, 2020-04-15 22:10:53]

LGTM

the recompiles of buildscripts are such a PITA. It's fantastic that this is now
fixed. Thanks!

[hahnjo, 2020-04-16 07:36:19]

fix 'make dist'

[hahnjo, 2020-04-17 19:52:31]

rebase and add dependency to compile.py