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1#!/usr/bin/env perl
2# SPDX-License-Identifier: GPL-2.0-or-later
3use strict;
4
5# Copyright (c) 2017-2020 Mauro Carvalho Chehab <mchehab@kernel.org>
6#
7
8my $prefix = "./";
9$prefix = "$ENV{'srctree'}/" if ($ENV{'srctree'});
10
11my $conf = $prefix . "Documentation/conf.py";
12my $requirement_file = $prefix . "Documentation/sphinx/requirements.txt";
13my $virtenv_prefix = "sphinx_";
14
15#
16# Static vars
17#
18
19my %missing;
20my $system_release;
21my $need = 0;
22my $optional = 0;
23my $need_symlink = 0;
24my $need_sphinx = 0;
25my $need_pip = 0;
26my $need_virtualenv = 0;
27my $rec_sphinx_upgrade = 0;
28my $verbose_warn_install = 1;
29my $install = "";
30my $virtenv_dir = "";
31my $python_cmd = "";
32my $activate_cmd;
33my $min_version;
34my $cur_version;
35my $rec_version = "3.4.3";
36my $latest_avail_ver;
37
38#
39# Command line arguments
40#
41
42my $pdf = 1;
43my $virtualenv = 1;
44my $version_check = 0;
45
46#
47# List of required texlive packages on Fedora and OpenSuse
48#
49
50my %texlive = (
51 'amsfonts.sty' => 'texlive-amsfonts',
52 'amsmath.sty' => 'texlive-amsmath',
53 'amssymb.sty' => 'texlive-amsfonts',
54 'amsthm.sty' => 'texlive-amscls',
55 'anyfontsize.sty' => 'texlive-anyfontsize',
56 'atbegshi.sty' => 'texlive-oberdiek',
57 'bm.sty' => 'texlive-tools',
58 'capt-of.sty' => 'texlive-capt-of',
59 'cmap.sty' => 'texlive-cmap',
60 'ecrm1000.tfm' => 'texlive-ec',
61 'eqparbox.sty' => 'texlive-eqparbox',
62 'eu1enc.def' => 'texlive-euenc',
63 'fancybox.sty' => 'texlive-fancybox',
64 'fancyvrb.sty' => 'texlive-fancyvrb',
65 'float.sty' => 'texlive-float',
66 'fncychap.sty' => 'texlive-fncychap',
67 'footnote.sty' => 'texlive-mdwtools',
68 'framed.sty' => 'texlive-framed',
69 'luatex85.sty' => 'texlive-luatex85',
70 'multirow.sty' => 'texlive-multirow',
71 'needspace.sty' => 'texlive-needspace',
72 'palatino.sty' => 'texlive-psnfss',
73 'parskip.sty' => 'texlive-parskip',
74 'polyglossia.sty' => 'texlive-polyglossia',
75 'tabulary.sty' => 'texlive-tabulary',
76 'threeparttable.sty' => 'texlive-threeparttable',
77 'titlesec.sty' => 'texlive-titlesec',
78 'ucs.sty' => 'texlive-ucs',
79 'upquote.sty' => 'texlive-upquote',
80 'wrapfig.sty' => 'texlive-wrapfig',
81 'ctexhook.sty' => 'texlive-ctex',
82);
83
84#
85# Subroutines that checks if a feature exists
86#
87
88sub check_missing(%)
89{
90 my %map = %{$_[0]};
91
92 foreach my $prog (sort keys %missing) {
93 my $is_optional = $missing{$prog};
94
95 # At least on some LTS distros like CentOS 7, texlive doesn't
96 # provide all packages we need. When such distros are
97 # detected, we have to disable PDF output.
98 #
99 # So, we need to ignore the packages that distros would
100 # need for LaTeX to work
101 if ($is_optional == 2 && !$pdf) {
102 $optional--;
103 next;
104 }
105
106 if ($verbose_warn_install) {
107 if ($is_optional) {
108 print "Warning: better to also install \"$prog\".\n";
109 } else {
110 print "ERROR: please install \"$prog\", otherwise, build won't work.\n";
111 }
112 }
113 if (defined($map{$prog})) {
114 $install .= " " . $map{$prog};
115 } else {
116 $install .= " " . $prog;
117 }
118 }
119
120 $install =~ s/^\s//;
121}
122
123sub add_package($$)
124{
125 my $package = shift;
126 my $is_optional = shift;
127
128 $missing{$package} = $is_optional;
129 if ($is_optional) {
130 $optional++;
131 } else {
132 $need++;
133 }
134}
135
136sub check_missing_file($$$)
137{
138 my $files = shift;
139 my $package = shift;
140 my $is_optional = shift;
141
142 for (@$files) {
143 return if(-e $_);
144 }
145
146 add_package($package, $is_optional);
147}
148
149sub findprog($)
150{
151 foreach(split(/:/, $ENV{PATH})) {
152 return "$_/$_[0]" if(-x "$_/$_[0]");
153 }
154}
155
156sub find_python_no_venv()
157{
158 my $prog = shift;
159
160 my $cur_dir = qx(pwd);
161 $cur_dir =~ s/\s+$//;
162
163 foreach my $dir (split(/:/, $ENV{PATH})) {
164 next if ($dir =~ m,($cur_dir)/sphinx,);
165 return "$dir/python3" if(-x "$dir/python3");
166 }
167 foreach my $dir (split(/:/, $ENV{PATH})) {
168 next if ($dir =~ m,($cur_dir)/sphinx,);
169 return "$dir/python" if(-x "$dir/python");
170 }
171 return "python";
172}
173
174sub check_program($$)
175{
176 my $prog = shift;
177 my $is_optional = shift;
178
179 return $prog if findprog($prog);
180
181 add_package($prog, $is_optional);
182}
183
184sub check_perl_module($$)
185{
186 my $prog = shift;
187 my $is_optional = shift;
188
189 my $err = system("perl -M$prog -e 1 2>/dev/null /dev/null");
190 return if ($err == 0);
191
192 add_package($prog, $is_optional);
193}
194
195sub check_python_module($$)
196{
197 my $prog = shift;
198 my $is_optional = shift;
199
200 return if (!$python_cmd);
201
202 my $err = system("$python_cmd -c 'import $prog' 2>/dev/null /dev/null");
203 return if ($err == 0);
204
205 add_package($prog, $is_optional);
206}
207
208sub check_rpm_missing($$)
209{
210 my @pkgs = @{$_[0]};
211 my $is_optional = $_[1];
212
213 foreach my $prog(@pkgs) {
214 my $err = system("rpm -q '$prog' 2>/dev/null >/dev/null");
215 add_package($prog, $is_optional) if ($err);
216 }
217}
218
219sub check_pacman_missing($$)
220{
221 my @pkgs = @{$_[0]};
222 my $is_optional = $_[1];
223
224 foreach my $prog(@pkgs) {
225 my $err = system("pacman -Q '$prog' 2>/dev/null >/dev/null");
226 add_package($prog, $is_optional) if ($err);
227 }
228}
229
230sub check_missing_tex($)
231{
232 my $is_optional = shift;
233 my $kpsewhich = findprog("kpsewhich");
234
235 foreach my $prog(keys %texlive) {
236 my $package = $texlive{$prog};
237 if (!$kpsewhich) {
238 add_package($package, $is_optional);
239 next;
240 }
241 my $file = qx($kpsewhich $prog);
242 add_package($package, $is_optional) if ($file =~ /^\s*$/);
243 }
244}
245
246sub get_sphinx_fname()
247{
248 my $fname = "sphinx-build";
249 return $fname if findprog($fname);
250
251 $fname = "sphinx-build-3";
252 if (findprog($fname)) {
253 $need_symlink = 1;
254 return $fname;
255 }
256
257 return "";
258}
259
260sub get_sphinx_version($)
261{
262 my $cmd = shift;
263 my $ver;
264
265 open IN, "$cmd --version 2>&1 |";
266 while (<IN>) {
267 if (m/^\s*sphinx-build\s+([\d\.]+)((\+\/[\da-f]+)|(b\d+))?$/) {
268 $ver=$1;
269 last;
270 }
271 # Sphinx 1.2.x uses a different format
272 if (m/^\s*Sphinx.*\s+([\d\.]+)$/) {
273 $ver=$1;
274 last;
275 }
276 }
277 close IN;
278 return $ver;
279}
280
281sub check_sphinx()
282{
283 open IN, $conf or die "Can't open $conf";
284 while (<IN>) {
285 if (m/^\s*needs_sphinx\s*=\s*[\'\"]([\d\.]+)[\'\"]/) {
286 $min_version=$1;
287 last;
288 }
289 }
290 close IN;
291
292 die "Can't get needs_sphinx version from $conf" if (!$min_version);
293
294 $virtenv_dir = $virtenv_prefix . "latest";
295
296 my $sphinx = get_sphinx_fname();
297 if ($sphinx eq "") {
298 $need_sphinx = 1;
299 return;
300 }
301
302 $cur_version = get_sphinx_version($sphinx);
303 die ("$sphinx returned an error") if (!$cur_version);
304
305 die "$sphinx didn't return its version" if (!$cur_version);
306
307 if ($cur_version lt $min_version) {
308 printf "ERROR: Sphinx version is %s. It should be >= %s\n",
309 $cur_version, $min_version;
310 $need_sphinx = 1;
311 return;
312 }
313
314 return if ($cur_version lt $rec_version);
315
316 # On version check mode, just assume Sphinx has all mandatory deps
317 exit (0) if ($version_check);
318}
319
320#
321# Ancillary subroutines
322#
323
324sub catcheck($)
325{
326 my $res = "";
327 $res = qx(cat $_[0]) if (-r $_[0]);
328 return $res;
329}
330
331sub which($)
332{
333 my $file = shift;
334 my @path = split ":", $ENV{PATH};
335
336 foreach my $dir(@path) {
337 my $name = $dir.'/'.$file;
338 return $name if (-x $name );
339 }
340 return undef;
341}
342
343#
344# Subroutines that check distro-specific hints
345#
346
347sub give_debian_hints()
348{
349 my %map = (
350 "python-sphinx" => "python3-sphinx",
351 "yaml" => "python3-yaml",
352 "ensurepip" => "python3-venv",
353 "virtualenv" => "virtualenv",
354 "dot" => "graphviz",
355 "convert" => "imagemagick",
356 "Pod::Usage" => "perl-modules",
357 "xelatex" => "texlive-xetex",
358 "rsvg-convert" => "librsvg2-bin",
359 );
360
361 if ($pdf) {
362 check_missing_file(["/usr/share/texlive/texmf-dist/tex/latex/ctex/ctexhook.sty"],
363 "texlive-lang-chinese", 2);
364
365 check_missing_file(["/usr/share/fonts/truetype/dejavu/DejaVuSans.ttf"],
366 "fonts-dejavu", 2);
367
368 check_missing_file(["/usr/share/fonts/noto-cjk/NotoSansCJK-Regular.ttc",
369 "/usr/share/fonts/opentype/noto/NotoSansCJK-Regular.ttc",
370 "/usr/share/fonts/opentype/noto/NotoSerifCJK-Regular.ttc"],
371 "fonts-noto-cjk", 2);
372 }
373
374 check_program("dvipng", 2) if ($pdf);
375 check_missing(\%map);
376
377 return if (!$need && !$optional);
378 printf("You should run:\n") if ($verbose_warn_install);
379 printf("\n\tsudo apt-get install $install\n");
380}
381
382sub give_redhat_hints()
383{
384 my %map = (
385 "python-sphinx" => "python3-sphinx",
386 "yaml" => "python3-pyyaml",
387 "virtualenv" => "python3-virtualenv",
388 "dot" => "graphviz",
389 "convert" => "ImageMagick",
390 "Pod::Usage" => "perl-Pod-Usage",
391 "xelatex" => "texlive-xetex-bin",
392 "rsvg-convert" => "librsvg2-tools",
393 );
394
395 my @fedora26_opt_pkgs = (
396 "graphviz-gd", # Fedora 26: needed for PDF support
397 );
398
399 my @fedora_tex_pkgs = (
400 "texlive-collection-fontsrecommended",
401 "texlive-collection-latex",
402 "texlive-xecjk",
403 "dejavu-sans-fonts",
404 "dejavu-serif-fonts",
405 "dejavu-sans-mono-fonts",
406 );
407
408 #
409 # Checks valid for RHEL/CentOS version 7.x.
410 #
411 my $old = 0;
412 my $rel;
413 my $noto_sans_redhat = "google-noto-sans-cjk-ttc-fonts";
414 $rel = $1 if ($system_release =~ /release\s+(\d+)/);
415
416 if (!($system_release =~ /Fedora/)) {
417 $map{"virtualenv"} = "python-virtualenv";
418
419 if ($rel && $rel < 8) {
420 $old = 1;
421 $pdf = 0;
422
423 printf("Note: texlive packages on RHEL/CENTOS <= 7 are incomplete. Can't support PDF output\n");
424 printf("If you want to build PDF, please read:\n");
425 printf("\thttps://www.systutorials.com/241660/how-to-install-tex-live-on-centos-7-linux/\n");
426 }
427 } else {
428 if ($rel && $rel < 26) {
429 $old = 1;
430 }
431 if ($rel && $rel >= 38) {
432 $noto_sans_redhat = "google-noto-sans-cjk-fonts";
433 }
434 }
435 if (!$rel) {
436 printf("Couldn't identify release number\n");
437 $old = 1;
438 $pdf = 0;
439 }
440
441 if ($pdf) {
442 check_missing_file(["/usr/share/fonts/google-noto-cjk/NotoSansCJK-Regular.ttc",
443 "/usr/share/fonts/google-noto-sans-cjk-fonts/NotoSansCJK-Regular.ttc"],
444 $noto_sans_redhat, 2);
445 }
446
447 check_rpm_missing(\@fedora26_opt_pkgs, 2) if ($pdf && !$old);
448 check_rpm_missing(\@fedora_tex_pkgs, 2) if ($pdf);
449 check_missing_tex(2) if ($pdf);
450 check_missing(\%map);
451
452 return if (!$need && !$optional);
453
454 if (!$old) {
455 # dnf, for Fedora 18+
456 printf("You should run:\n") if ($verbose_warn_install);
457 printf("\n\tsudo dnf install -y $install\n");
458 } else {
459 # yum, for RHEL (and clones) or Fedora version < 18
460 printf("You should run:\n") if ($verbose_warn_install);
461 printf("\n\tsudo yum install -y $install\n");
462 }
463}
464
465sub give_opensuse_hints()
466{
467 my %map = (
468 "python-sphinx" => "python3-sphinx",
469 "yaml" => "python3-pyyaml",
470 "virtualenv" => "python3-virtualenv",
471 "dot" => "graphviz",
472 "convert" => "ImageMagick",
473 "Pod::Usage" => "perl-Pod-Usage",
474 "xelatex" => "texlive-xetex-bin",
475 );
476
477 # On Tumbleweed, this package is also named rsvg-convert
478 $map{"rsvg-convert"} = "rsvg-view" if (!($system_release =~ /Tumbleweed/));
479
480 my @suse_tex_pkgs = (
481 "texlive-babel-english",
482 "texlive-caption",
483 "texlive-colortbl",
484 "texlive-courier",
485 "texlive-dvips",
486 "texlive-helvetic",
487 "texlive-makeindex",
488 "texlive-metafont",
489 "texlive-metapost",
490 "texlive-palatino",
491 "texlive-preview",
492 "texlive-times",
493 "texlive-zapfchan",
494 "texlive-zapfding",
495 );
496
497 $map{"latexmk"} = "texlive-latexmk-bin";
498
499 # FIXME: add support for installing CJK fonts
500 #
501 # I tried hard, but was unable to find a way to install
502 # "Noto Sans CJK SC" on openSUSE
503
504 check_rpm_missing(\@suse_tex_pkgs, 2) if ($pdf);
505 check_missing_tex(2) if ($pdf);
506 check_missing(\%map);
507
508 return if (!$need && !$optional);
509 printf("You should run:\n") if ($verbose_warn_install);
510 printf("\n\tsudo zypper install --no-recommends $install\n");
511}
512
513sub give_mageia_hints()
514{
515 my %map = (
516 "python-sphinx" => "python3-sphinx",
517 "virtualenv" => "python3-virtualenv",
518 "dot" => "graphviz",
519 "convert" => "ImageMagick",
520 "Pod::Usage" => "perl-Pod-Usage",
521 "xelatex" => "texlive",
522 "rsvg-convert" => "librsvg2",
523 );
524
525 my @tex_pkgs = (
526 "texlive-fontsextra",
527 );
528
529 $map{"latexmk"} = "texlive-collection-basic";
530
531 my $packager_cmd;
532 my $noto_sans;
533 if ($system_release =~ /OpenMandriva/) {
534 $packager_cmd = "dnf install";
535 $noto_sans = "noto-sans-cjk-fonts";
536 @tex_pkgs = ( "texlive-collection-fontsextra" );
537 } else {
538 $packager_cmd = "urpmi";
539 $noto_sans = "google-noto-sans-cjk-ttc-fonts";
540 }
541
542
543 if ($pdf) {
544 check_missing_file(["/usr/share/fonts/google-noto-cjk/NotoSansCJK-Regular.ttc",
545 "/usr/share/fonts/TTF/NotoSans-Regular.ttf"],
546 $noto_sans, 2);
547 }
548
549 check_rpm_missing(\@tex_pkgs, 2) if ($pdf);
550 check_missing(\%map);
551
552 return if (!$need && !$optional);
553 printf("You should run:\n") if ($verbose_warn_install);
554 printf("\n\tsudo $packager_cmd $install\n");
555}
556
557sub give_arch_linux_hints()
558{
559 my %map = (
560 "virtualenv" => "python-virtualenv",
561 "dot" => "graphviz",
562 "convert" => "imagemagick",
563 "xelatex" => "texlive-bin",
564 "latexmk" => "texlive-core",
565 "rsvg-convert" => "extra/librsvg",
566 );
567
568 my @archlinux_tex_pkgs = (
569 "texlive-core",
570 "texlive-latexextra",
571 "ttf-dejavu",
572 );
573 check_pacman_missing(\@archlinux_tex_pkgs, 2) if ($pdf);
574
575 if ($pdf) {
576 check_missing_file(["/usr/share/fonts/noto-cjk/NotoSansCJK-Regular.ttc"],
577 "noto-fonts-cjk", 2);
578 }
579
580 check_missing(\%map);
581
582 return if (!$need && !$optional);
583 printf("You should run:\n") if ($verbose_warn_install);
584 printf("\n\tsudo pacman -S $install\n");
585}
586
587sub give_gentoo_hints()
588{
589 my %map = (
590 "virtualenv" => "dev-python/virtualenv",
591 "dot" => "media-gfx/graphviz",
592 "convert" => "media-gfx/imagemagick",
593 "xelatex" => "dev-texlive/texlive-xetex media-fonts/dejavu",
594 "rsvg-convert" => "gnome-base/librsvg",
595 );
596
597 check_missing_file(["/usr/share/fonts/dejavu/DejaVuSans.ttf"],
598 "media-fonts/dejavu", 2) if ($pdf);
599
600 if ($pdf) {
601 check_missing_file(["/usr/share/fonts/noto-cjk/NotoSansCJKsc-Regular.otf",
602 "/usr/share/fonts/noto-cjk/NotoSerifCJK-Regular.ttc"],
603 "media-fonts/noto-cjk", 2);
604 }
605
606 check_missing(\%map);
607
608 return if (!$need && !$optional);
609
610 printf("You should run:\n") if ($verbose_warn_install);
611 printf("\n");
612
613 my $imagemagick = "media-gfx/imagemagick svg png";
614 my $cairo = "media-gfx/graphviz cairo pdf";
615 my $portage_imagemagick = "/etc/portage/package.use/imagemagick";
616 my $portage_cairo = "/etc/portage/package.use/graphviz";
617
618 if (qx(grep imagemagick $portage_imagemagick 2>/dev/null) eq "") {
619 printf("\tsudo su -c 'echo \"$imagemagick\" > $portage_imagemagick'\n")
620 }
621 if (qx(grep graphviz $portage_cairo 2>/dev/null) eq "") {
622 printf("\tsudo su -c 'echo \"$cairo\" > $portage_cairo'\n");
623 }
624
625 printf("\tsudo emerge --ask $install\n");
626
627}
628
629sub check_distros()
630{
631 # Distro-specific hints
632 if ($system_release =~ /Red Hat Enterprise Linux/) {
633 give_redhat_hints;
634 return;
635 }
636 if ($system_release =~ /CentOS/) {
637 give_redhat_hints;
638 return;
639 }
640 if ($system_release =~ /Scientific Linux/) {
641 give_redhat_hints;
642 return;
643 }
644 if ($system_release =~ /Oracle Linux Server/) {
645 give_redhat_hints;
646 return;
647 }
648 if ($system_release =~ /Fedora/) {
649 give_redhat_hints;
650 return;
651 }
652 if ($system_release =~ /Ubuntu/) {
653 give_debian_hints;
654 return;
655 }
656 if ($system_release =~ /Debian/) {
657 give_debian_hints;
658 return;
659 }
660 if ($system_release =~ /openSUSE/) {
661 give_opensuse_hints;
662 return;
663 }
664 if ($system_release =~ /Mageia/) {
665 give_mageia_hints;
666 return;
667 }
668 if ($system_release =~ /OpenMandriva/) {
669 give_mageia_hints;
670 return;
671 }
672 if ($system_release =~ /Arch Linux/) {
673 give_arch_linux_hints;
674 return;
675 }
676 if ($system_release =~ /Gentoo/) {
677 give_gentoo_hints;
678 return;
679 }
680
681 #
682 # Fall-back to generic hint code for other distros
683 # That's far from ideal, specially for LaTeX dependencies.
684 #
685 my %map = (
686 "sphinx-build" => "sphinx"
687 );
688 check_missing_tex(2) if ($pdf);
689 check_missing(\%map);
690 print "I don't know distro $system_release.\n";
691 print "So, I can't provide you a hint with the install procedure.\n";
692 print "There are likely missing dependencies.\n";
693}
694
695#
696# Common dependencies
697#
698
699sub deactivate_help()
700{
701 printf "\n If you want to exit the virtualenv, you can use:\n";
702 printf "\tdeactivate\n";
703}
704
705sub get_virtenv()
706{
707 my $ver;
708 my $min_activate = "$ENV{'PWD'}/${virtenv_prefix}${min_version}/bin/activate";
709 my @activates = glob "$ENV{'PWD'}/${virtenv_prefix}*/bin/activate";
710
711 @activates = sort {$b cmp $a} @activates;
712
713 foreach my $f (@activates) {
714 next if ($f lt $min_activate);
715
716 my $sphinx_cmd = $f;
717 $sphinx_cmd =~ s/activate/sphinx-build/;
718 next if (! -f $sphinx_cmd);
719
720 my $ver = get_sphinx_version($sphinx_cmd);
721
722 if (!$ver) {
723 $f =~ s#/bin/activate##;
724 print("Warning: virtual environment $f is not working.\nPython version upgrade? Remove it with:\n\n\trm -rf $f\n\n");
725 }
726
727 if ($need_sphinx && ($ver ge $min_version)) {
728 return ($f, $ver);
729 } elsif ($ver gt $cur_version) {
730 return ($f, $ver);
731 }
732 }
733 return ("", "");
734}
735
736sub recommend_sphinx_upgrade()
737{
738 my $venv_ver;
739
740 # Avoid running sphinx-builds from venv if $cur_version is good
741 if ($cur_version && ($cur_version ge $rec_version)) {
742 $latest_avail_ver = $cur_version;
743 return;
744 }
745
746 # Get the highest version from sphinx_*/bin/sphinx-build and the
747 # corresponding command to activate the venv/virtenv
748 ($activate_cmd, $venv_ver) = get_virtenv();
749
750 # Store the highest version from Sphinx existing virtualenvs
751 if (($activate_cmd ne "") && ($venv_ver gt $cur_version)) {
752 $latest_avail_ver = $venv_ver;
753 } else {
754 $latest_avail_ver = $cur_version if ($cur_version);
755 }
756
757 # As we don't know package version of Sphinx, and there's no
758 # virtual environments, don't check if upgrades are needed
759 if (!$virtualenv) {
760 return if (!$latest_avail_ver);
761 }
762
763 # Either there are already a virtual env or a new one should be created
764 $need_pip = 1;
765
766 return if (!$latest_avail_ver);
767
768 # Return if the reason is due to an upgrade or not
769 if ($latest_avail_ver lt $rec_version) {
770 $rec_sphinx_upgrade = 1;
771 }
772
773 return $latest_avail_ver;
774}
775
776#
777# The logic here is complex, as it have to deal with different versions:
778# - minimal supported version;
779# - minimal PDF version;
780# - recommended version.
781# It also needs to work fine with both distro's package and venv/virtualenv
782sub recommend_sphinx_version($)
783{
784 my $virtualenv_cmd = shift;
785
786 # Version is OK. Nothing to do.
787 if ($cur_version && ($cur_version ge $rec_version)) {
788 return;
789 };
790
791 if (!$need_sphinx) {
792 # sphinx-build is present and its version is >= $min_version
793
794 #only recommend enabling a newer virtenv version if makes sense.
795 if ($latest_avail_ver gt $cur_version) {
796 printf "\nYou may also use the newer Sphinx version $latest_avail_ver with:\n";
797 printf "\tdeactivate\n" if ($ENV{'PWD'} =~ /${virtenv_prefix}/);
798 printf "\t. $activate_cmd\n";
799 deactivate_help();
800
801 return;
802 }
803 return if ($latest_avail_ver ge $rec_version);
804 }
805
806 if (!$virtualenv) {
807 # No sphinx either via package or via virtenv. As we can't
808 # Compare the versions here, just return, recommending the
809 # user to install it from the package distro.
810 return if (!$latest_avail_ver);
811
812 # User doesn't want a virtenv recommendation, but he already
813 # installed one via virtenv with a newer version.
814 # So, print commands to enable it
815 if ($latest_avail_ver gt $cur_version) {
816 printf "\nYou may also use the Sphinx virtualenv version $latest_avail_ver with:\n";
817 printf "\tdeactivate\n" if ($ENV{'PWD'} =~ /${virtenv_prefix}/);
818 printf "\t. $activate_cmd\n";
819 deactivate_help();
820
821 return;
822 }
823 print "\n";
824 } else {
825 $need++ if ($need_sphinx);
826 }
827
828 # Suggest newer versions if current ones are too old
829 if ($latest_avail_ver && $latest_avail_ver ge $min_version) {
830 # If there's a good enough version, ask the user to enable it
831 if ($latest_avail_ver ge $rec_version) {
832 printf "\nNeed to activate Sphinx (version $latest_avail_ver) on virtualenv with:\n";
833 printf "\t. $activate_cmd\n";
834 deactivate_help();
835
836 return;
837 }
838
839 # Version is above the minimal required one, but may be
840 # below the recommended one. So, print warnings/notes
841
842 if ($latest_avail_ver lt $rec_version) {
843 print "Warning: It is recommended at least Sphinx version $rec_version.\n";
844 }
845 }
846
847 # At this point, either it needs Sphinx or upgrade is recommended,
848 # both via pip
849
850 if ($rec_sphinx_upgrade) {
851 if (!$virtualenv) {
852 print "Instead of install/upgrade Python Sphinx pkg, you could use pip/pypi with:\n\n";
853 } else {
854 print "To upgrade Sphinx, use:\n\n";
855 }
856 } else {
857 print "\nSphinx needs to be installed either:\n1) via pip/pypi with:\n\n";
858 }
859
860 $python_cmd = find_python_no_venv();
861
862 printf "\t$virtualenv_cmd $virtenv_dir\n";
863
864 printf "\t. $virtenv_dir/bin/activate\n";
865 printf "\tpip install -r $requirement_file\n";
866 deactivate_help();
867
868 printf "\n2) As a package with:\n";
869
870 my $old_need = $need;
871 my $old_optional = $optional;
872 %missing = ();
873 $pdf = 0;
874 $optional = 0;
875 $install = "";
876 $verbose_warn_install = 0;
877
878 add_package("python-sphinx", 0);
879
880 check_distros();
881
882 $need = $old_need;
883 $optional = $old_optional;
884
885 printf "\n Please note that Sphinx >= 3.0 will currently produce false-positive\n";
886 printf " warning when the same name is used for more than one type (functions,\n";
887 printf " structs, enums,...). This is known Sphinx bug. For more details, see:\n";
888 printf "\thttps://github.com/sphinx-doc/sphinx/pull/8313\n";
889}
890
891sub check_needs()
892{
893 # Check if Sphinx is already accessible from current environment
894 check_sphinx();
895
896 if ($system_release) {
897 print "Detected OS: $system_release.\n";
898 } else {
899 print "Unknown OS\n";
900 }
901 printf "Sphinx version: %s\n\n", $cur_version if ($cur_version);
902
903 # Check python command line, trying first python3
904 $python_cmd = findprog("python3");
905 $python_cmd = check_program("python", 0) if (!$python_cmd);
906
907 # Check the type of virtual env, depending on Python version
908 if ($python_cmd) {
909 if ($virtualenv) {
910 my $tmp = qx($python_cmd --version 2>&1);
911 if ($tmp =~ m/(\d+\.)(\d+\.)/) {
912 if ($1 < 3) {
913 # Fail if it finds python2 (or worse)
914 die "Python 3 is required to build the kernel docs\n";
915 }
916 if ($1 == 3 && $2 < 3) {
917 # Need Python 3.3 or upper for venv
918 $need_virtualenv = 1;
919 }
920 } else {
921 die "Warning: couldn't identify $python_cmd version!";
922 }
923 } else {
924 add_package("python-sphinx", 0);
925 }
926 }
927
928 my $venv_ver = recommend_sphinx_upgrade();
929
930 my $virtualenv_cmd;
931
932 if ($need_pip) {
933 # Set virtualenv command line, if python < 3.3
934 if ($need_virtualenv) {
935 $virtualenv_cmd = findprog("virtualenv-3");
936 $virtualenv_cmd = findprog("virtualenv-3.5") if (!$virtualenv_cmd);
937 if (!$virtualenv_cmd) {
938 check_program("virtualenv", 0);
939 $virtualenv_cmd = "virtualenv";
940 }
941 } else {
942 $virtualenv_cmd = "$python_cmd -m venv";
943 check_python_module("ensurepip", 0);
944 }
945 }
946
947 # Check for needed programs/tools
948 check_perl_module("Pod::Usage", 0);
949 check_python_module("yaml", 0);
950 check_program("make", 0);
951 check_program("gcc", 0);
952 check_program("dot", 1);
953 check_program("convert", 1);
954
955 # Extra PDF files - should use 2 for is_optional
956 check_program("xelatex", 2) if ($pdf);
957 check_program("rsvg-convert", 2) if ($pdf);
958 check_program("latexmk", 2) if ($pdf);
959
960 # Do distro-specific checks and output distro-install commands
961 check_distros();
962
963 if (!$python_cmd) {
964 if ($need == 1) {
965 die "Can't build as $need mandatory dependency is missing";
966 } elsif ($need) {
967 die "Can't build as $need mandatory dependencies are missing";
968 }
969 }
970
971 # Check if sphinx-build is called sphinx-build-3
972 if ($need_symlink) {
973 printf "\tsudo ln -sf %s /usr/bin/sphinx-build\n\n",
974 which("sphinx-build-3");
975 }
976
977 recommend_sphinx_version($virtualenv_cmd);
978 printf "\n";
979
980 print "All optional dependencies are met.\n" if (!$optional);
981
982 if ($need == 1) {
983 die "Can't build as $need mandatory dependency is missing";
984 } elsif ($need) {
985 die "Can't build as $need mandatory dependencies are missing";
986 }
987
988 print "Needed package dependencies are met.\n";
989}
990
991#
992# Main
993#
994
995while (@ARGV) {
996 my $arg = shift(@ARGV);
997
998 if ($arg eq "--no-virtualenv") {
999 $virtualenv = 0;
1000 } elsif ($arg eq "--no-pdf"){
1001 $pdf = 0;
1002 } elsif ($arg eq "--version-check"){
1003 $version_check = 1;
1004 } else {
1005 print "Usage:\n\t$0 <--no-virtualenv> <--no-pdf> <--version-check>\n\n";
1006 print "Where:\n";
1007 print "\t--no-virtualenv\t- Recommend installing Sphinx instead of using a virtualenv\n";
1008 print "\t--version-check\t- if version is compatible, don't check for missing dependencies\n";
1009 print "\t--no-pdf\t- don't check for dependencies required to build PDF docs\n\n";
1010 exit -1;
1011 }
1012}
1013
1014#
1015# Determine the system type. There's no standard unique way that would
1016# work with all distros with a minimal package install. So, several
1017# methods are used here.
1018#
1019# By default, it will use lsb_release function. If not available, it will
1020# fail back to reading the known different places where the distro name
1021# is stored
1022#
1023
1024$system_release = qx(lsb_release -d) if which("lsb_release");
1025$system_release =~ s/Description:\s*// if ($system_release);
1026$system_release = catcheck("/etc/system-release") if !$system_release;
1027$system_release = catcheck("/etc/redhat-release") if !$system_release;
1028$system_release = catcheck("/etc/lsb-release") if !$system_release;
1029$system_release = catcheck("/etc/gentoo-release") if !$system_release;
1030
1031# This seems more common than LSB these days
1032if (!$system_release) {
1033 my %os_var;
1034 if (open IN, "cat /etc/os-release|") {
1035 while (<IN>) {
1036 if (m/^([\w\d\_]+)=\"?([^\"]*)\"?\n/) {
1037 $os_var{$1}=$2;
1038 }
1039 }
1040 $system_release = $os_var{"NAME"};
1041 if (defined($os_var{"VERSION_ID"})) {
1042 $system_release .= " " . $os_var{"VERSION_ID"} if (defined($os_var{"VERSION_ID"}));
1043 } else {
1044 $system_release .= " " . $os_var{"VERSION"};
1045 }
1046 }
1047}
1048$system_release = catcheck("/etc/issue") if !$system_release;
1049$system_release =~ s/\s+$//;
1050
1051check_needs;