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diagnostics: use libtextstyle for colored output

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Bruno Haible released libtextstyle, a library for colored output based
on CSS.  Let's use it to generate colored diagnostics, provided
libtextstyle is available.

See
https://lists.gnu.org/archive/html/bug-gnulib/2019-01/msg00176.html
https://lists.gnu.org/archive/html/bison-patches/2019-02/msg00073.html
https://lists.gnu.org/archive/html/bison-patches/2019-02/msg00084.html
https://lists.gnu.org/archive/html/bison-patches/2019-03/msg00007.html

* bootstrap.conf (gnulib_modules): Use libtextstyle when possible.
* data/diagnostics.css: New.
* src/complain.c (begin_use_class, end_use_class, flush)
(severity_style, complain_init_color): New.
Use them.
* src/getargs.c (getargs_colors): New.
(getargs): Use it.
Skip --color and --style.
* src/location.h, src/location.c (location_print): Use a style.

* tests/bison.in: Force --color=yes when stderr is a tty.
* tests/local.at: Disable colors during the test suite.
* tests/input.at: Adjust expectations to the extra options passed on
the command line.
This commit is contained in:
Akim Demaille
2019-02-14 06:49:29 +01:00
parent 855fbf1c11
commit f6e38d7ac9
13 changed files with 203 additions and 25 deletions
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4
tests/local.at
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@@ -807,7 +807,7 @@ AT_BISON_CHECK_NO_XML($@)])
# --------------------------------------------------
# Low-level macro to run bison once.
m4_define([AT_BISON_CHECK_],
[AT_CHECK(AT_QUELL_VALGRIND[[ bison -fno-caret ]]$@)])
[AT_CHECK(AT_QUELL_VALGRIND[[ bison --color=no -fno-caret ]]$@)])
# AT_BISON_CHECK_WARNINGS(BISON_ARGS, [OTHER_AT_CHECK_ARGS])
@@ -862,7 +862,7 @@ fi]dnl
# when a tortured grammar's XML is known to be too large for xsltproc to
# handle.
m4_define([AT_BISON_CHECK_NO_XML],
[AT_CHECK(m4_null_if([$2], [], [AT_QUELL_VALGRIND ])[[bison -fno-caret ]]$@)
[AT_CHECK(m4_null_if([$2], [], [AT_QUELL_VALGRIND ])[[bison --color=no -fno-caret ]]$@)
AT_BISON_CHECK_WARNINGS($@)])
# AT_BISON_CHECK_XML(BISON_ARGS, [OTHER_AT_CHECK_ARGS])