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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 $install = "";
29my $virtenv_dir = "";
30my $python_cmd = "";
31my $activate_cmd;
32my $min_version;
33my $cur_version;
34my $rec_version = "1.7.9"; # PDF won't build here
35my $min_pdf_version = "2.4.4"; # Min version where pdf builds
36my $latest_avail_ver;
37
38#
39# Command line arguments
40#
41
42my $pdf = 1;
43my $virtualenv = 1;
44my $version_check = 0;
45
46#
47# List of required texlive packages on Fedora and OpenSuse
48#
49
50my %texlive = (
51 'amsfonts.sty' => 'texlive-amsfonts',
52 'amsmath.sty' => 'texlive-amsmath',
53 'amssymb.sty' => 'texlive-amsfonts',
54 'amsthm.sty' => 'texlive-amscls',
55 'anyfontsize.sty' => 'texlive-anyfontsize',
56 'atbegshi.sty' => 'texlive-oberdiek',
57 'bm.sty' => 'texlive-tools',
58 'capt-of.sty' => 'texlive-capt-of',
59 'cmap.sty' => 'texlive-cmap',
60 'ecrm1000.tfm' => 'texlive-ec',
61 'eqparbox.sty' => 'texlive-eqparbox',
62 'eu1enc.def' => 'texlive-euenc',
63 'fancybox.sty' => 'texlive-fancybox',
64 'fancyvrb.sty' => 'texlive-fancyvrb',
65 'float.sty' => 'texlive-float',
66 'fncychap.sty' => 'texlive-fncychap',
67 'footnote.sty' => 'texlive-mdwtools',
68 'framed.sty' => 'texlive-framed',
69 'luatex85.sty' => 'texlive-luatex85',
70 'multirow.sty' => 'texlive-multirow',
71 'needspace.sty' => 'texlive-needspace',
72 'palatino.sty' => 'texlive-psnfss',
73 'parskip.sty' => 'texlive-parskip',
74 'polyglossia.sty' => 'texlive-polyglossia',
75 'tabulary.sty' => 'texlive-tabulary',
76 'threeparttable.sty' => 'texlive-threeparttable',
77 'titlesec.sty' => 'texlive-titlesec',
78 'ucs.sty' => 'texlive-ucs',
79 'upquote.sty' => 'texlive-upquote',
80 'wrapfig.sty' => 'texlive-wrapfig',
81);
82
83#
84# Subroutines that checks if a feature exists
85#
86
87sub check_missing(%)
88{
89 my %map = %{$_[0]};
90
91 foreach my $prog (sort keys %missing) {
92 my $is_optional = $missing{$prog};
93
94 # At least on some LTS distros like CentOS 7, texlive doesn't
95 # provide all packages we need. When such distros are
96 # detected, we have to disable PDF output.
97 #
98 # So, we need to ignore the packages that distros would
99 # need for LaTeX to work
100 if ($is_optional == 2 && !$pdf) {
101 $optional--;
102 next;
103 }
104
105 if ($is_optional) {
106 print "Warning: better to also install \"$prog\".\n";
107 } else {
108 print "ERROR: please install \"$prog\", otherwise, build won't work.\n";
109 }
110 if (defined($map{$prog})) {
111 $install .= " " . $map{$prog};
112 } else {
113 $install .= " " . $prog;
114 }
115 }
116
117 $install =~ s/^\s//;
118}
119
120sub add_package($$)
121{
122 my $package = shift;
123 my $is_optional = shift;
124
125 $missing{$package} = $is_optional;
126 if ($is_optional) {
127 $optional++;
128 } else {
129 $need++;
130 }
131}
132
133sub check_missing_file($$$)
134{
135 my $files = shift;
136 my $package = shift;
137 my $is_optional = shift;
138
139 for (@$files) {
140 return if(-e $_);
141 }
142
143 add_package($package, $is_optional);
144}
145
146sub findprog($)
147{
148 foreach(split(/:/, $ENV{PATH})) {
149 return "$_/$_[0]" if(-x "$_/$_[0]");
150 }
151}
152
153sub find_python_no_venv()
154{
155 my $prog = shift;
156
157 my $cur_dir = qx(pwd);
158 $cur_dir =~ s/\s+$//;
159
160 foreach my $dir (split(/:/, $ENV{PATH})) {
161 next if ($dir =~ m,($cur_dir)/sphinx,);
162 return "$dir/python3" if(-x "$dir/python3");
163 }
164 foreach my $dir (split(/:/, $ENV{PATH})) {
165 next if ($dir =~ m,($cur_dir)/sphinx,);
166 return "$dir/python" if(-x "$dir/python");
167 }
168 return "python";
169}
170
171sub check_program($$)
172{
173 my $prog = shift;
174 my $is_optional = shift;
175
176 return $prog if findprog($prog);
177
178 add_package($prog, $is_optional);
179}
180
181sub check_perl_module($$)
182{
183 my $prog = shift;
184 my $is_optional = shift;
185
186 my $err = system("perl -M$prog -e 1 2>/dev/null /dev/null");
187 return if ($err == 0);
188
189 add_package($prog, $is_optional);
190}
191
192sub check_python_module($$)
193{
194 my $prog = shift;
195 my $is_optional = shift;
196
197 return if (!$python_cmd);
198
199 my $err = system("$python_cmd -c 'import $prog' 2>/dev/null /dev/null");
200 return if ($err == 0);
201
202 add_package($prog, $is_optional);
203}
204
205sub check_rpm_missing($$)
206{
207 my @pkgs = @{$_[0]};
208 my $is_optional = $_[1];
209
210 foreach my $prog(@pkgs) {
211 my $err = system("rpm -q '$prog' 2>/dev/null >/dev/null");
212 add_package($prog, $is_optional) if ($err);
213 }
214}
215
216sub check_pacman_missing($$)
217{
218 my @pkgs = @{$_[0]};
219 my $is_optional = $_[1];
220
221 foreach my $prog(@pkgs) {
222 my $err = system("pacman -Q '$prog' 2>/dev/null >/dev/null");
223 add_package($prog, $is_optional) if ($err);
224 }
225}
226
227sub check_missing_tex($)
228{
229 my $is_optional = shift;
230 my $kpsewhich = findprog("kpsewhich");
231
232 foreach my $prog(keys %texlive) {
233 my $package = $texlive{$prog};
234 if (!$kpsewhich) {
235 add_package($package, $is_optional);
236 next;
237 }
238 my $file = qx($kpsewhich $prog);
239 add_package($package, $is_optional) if ($file =~ /^\s*$/);
240 }
241}
242
243sub get_sphinx_fname()
244{
245 my $fname = "sphinx-build";
246 return $fname if findprog($fname);
247
248 $fname = "sphinx-build-3";
249 if (findprog($fname)) {
250 $need_symlink = 1;
251 return $fname;
252 }
253
254 return "";
255}
256
257sub get_sphinx_version($)
258{
259 my $cmd = shift;
260 my $ver;
261
262 open IN, "$cmd --version 2>&1 |";
263 while (<IN>) {
264 if (m/^\s*sphinx-build\s+([\d\.]+)((\+\/[\da-f]+)|(b\d+))?$/) {
265 $ver=$1;
266 last;
267 }
268 # Sphinx 1.2.x uses a different format
269 if (m/^\s*Sphinx.*\s+([\d\.]+)$/) {
270 $ver=$1;
271 last;
272 }
273 }
274 close IN;
275 return $ver;
276}
277
278sub check_sphinx()
279{
280 my $default_version;
281
282 open IN, $conf or die "Can't open $conf";
283 while (<IN>) {
284 if (m/^\s*needs_sphinx\s*=\s*[\'\"]([\d\.]+)[\'\"]/) {
285 $min_version=$1;
286 last;
287 }
288 }
289 close IN;
290
291 die "Can't get needs_sphinx version from $conf" if (!$min_version);
292
293 open IN, $requirement_file or die "Can't open $requirement_file";
294 while (<IN>) {
295 if (m/^\s*Sphinx\s*==\s*([\d\.]+)$/) {
296 $default_version=$1;
297 last;
298 }
299 }
300 close IN;
301
302 die "Can't get default sphinx version from $requirement_file" if (!$default_version);
303
304 $virtenv_dir = $virtenv_prefix . $default_version;
305
306 my $sphinx = get_sphinx_fname();
307 if ($sphinx eq "") {
308 $need_sphinx = 1;
309 return;
310 }
311
312 $cur_version = get_sphinx_version($sphinx);
313 die ("$sphinx returned an error") if (!$cur_version);
314
315 die "$sphinx didn't return its version" if (!$cur_version);
316
317 if ($cur_version lt $min_version) {
318 printf "ERROR: Sphinx version is %s. It should be >= %s (recommended >= %s)\n",
319 $cur_version, $min_version, $default_version;
320 $need_sphinx = 1;
321 return;
322 }
323
324 return if ($cur_version lt $rec_version);
325
326 # On version check mode, just assume Sphinx has all mandatory deps
327 exit (0) if ($version_check);
328}
329
330#
331# Ancillary subroutines
332#
333
334sub catcheck($)
335{
336 my $res = "";
337 $res = qx(cat $_[0]) if (-r $_[0]);
338 return $res;
339}
340
341sub which($)
342{
343 my $file = shift;
344 my @path = split ":", $ENV{PATH};
345
346 foreach my $dir(@path) {
347 my $name = $dir.'/'.$file;
348 return $name if (-x $name );
349 }
350 return undef;
351}
352
353#
354# Subroutines that check distro-specific hints
355#
356
357sub give_debian_hints()
358{
359 my %map = (
360 "python-sphinx" => "python3-sphinx",
361 "sphinx_rtd_theme" => "python3-sphinx-rtd-theme",
362 "ensurepip" => "python3-venv",
363 "virtualenv" => "virtualenv",
364 "dot" => "graphviz",
365 "convert" => "imagemagick",
366 "Pod::Usage" => "perl-modules",
367 "xelatex" => "texlive-xetex",
368 "rsvg-convert" => "librsvg2-bin",
369 );
370
371 if ($pdf) {
372 check_missing_file(["/usr/share/fonts/truetype/dejavu/DejaVuSans.ttf"],
373 "fonts-dejavu", 2);
374
375 check_missing_file(["/usr/share/fonts/noto-cjk/NotoSansCJK-Regular.ttc",
376 "/usr/share/fonts/opentype/noto/NotoSansCJK-Regular.ttc",
377 "/usr/share/fonts/opentype/noto/NotoSerifCJK-Regular.ttc"],
378 "fonts-noto-cjk", 2);
379 }
380
381 check_program("dvipng", 2) if ($pdf);
382 check_missing(\%map);
383
384 return if (!$need && !$optional);
385 printf("You should run:\n\n\tsudo apt-get install $install\n");
386}
387
388sub give_redhat_hints()
389{
390 my %map = (
391 "python-sphinx" => "python3-sphinx",
392 "sphinx_rtd_theme" => "python3-sphinx_rtd_theme",
393 "virtualenv" => "python3-virtualenv",
394 "dot" => "graphviz",
395 "convert" => "ImageMagick",
396 "Pod::Usage" => "perl-Pod-Usage",
397 "xelatex" => "texlive-xetex-bin",
398 "rsvg-convert" => "librsvg2-tools",
399 );
400
401 my @fedora26_opt_pkgs = (
402 "graphviz-gd", # Fedora 26: needed for PDF support
403 );
404
405 my @fedora_tex_pkgs = (
406 "texlive-collection-fontsrecommended",
407 "texlive-collection-latex",
408 "texlive-xecjk",
409 "dejavu-sans-fonts",
410 "dejavu-serif-fonts",
411 "dejavu-sans-mono-fonts",
412 );
413
414 #
415 # Checks valid for RHEL/CentOS version 7.x.
416 #
417 my $old = 0;
418 my $rel;
419 $rel = $1 if ($system_release =~ /release\s+(\d+)/);
420
421 if (!($system_release =~ /Fedora/)) {
422 $map{"virtualenv"} = "python-virtualenv";
423
424 if ($rel && $rel < 8) {
425 $old = 1;
426 $pdf = 0;
427
428 printf("Note: texlive packages on RHEL/CENTOS <= 7 are incomplete. Can't support PDF output\n");
429 printf("If you want to build PDF, please read:\n");
430 printf("\thttps://www.systutorials.com/241660/how-to-install-tex-live-on-centos-7-linux/\n");
431 }
432 } else {
433 if ($rel && $rel < 26) {
434 $old = 1;
435 }
436 }
437 if (!$rel) {
438 printf("Couldn't identify release number\n");
439 $old = 1;
440 $pdf = 0;
441 }
442
443 if ($pdf) {
444 check_missing_file(["/usr/share/fonts/google-noto-cjk/NotoSansCJK-Regular.ttc"],
445 "google-noto-sans-cjk-ttc-fonts", 2);
446 }
447
448 check_rpm_missing(\@fedora26_opt_pkgs, 2) if ($pdf && !$old);
449 check_rpm_missing(\@fedora_tex_pkgs, 2) if ($pdf);
450 check_missing_tex(2) if ($pdf);
451 check_missing(\%map);
452
453 return if (!$need && !$optional);
454
455 if (!$old) {
456 # dnf, for Fedora 18+
457 printf("You should run:\n\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\n\tsudo yum install -y $install\n");
461 }
462}
463
464sub give_opensuse_hints()
465{
466 my %map = (
467 "python-sphinx" => "python3-sphinx",
468 "sphinx_rtd_theme" => "python3-sphinx_rtd_theme",
469 "virtualenv" => "python3-virtualenv",
470 "dot" => "graphviz",
471 "convert" => "ImageMagick",
472 "Pod::Usage" => "perl-Pod-Usage",
473 "xelatex" => "texlive-xetex-bin",
474 );
475
476 # On Tumbleweed, this package is also named rsvg-convert
477 $map{"rsvg-convert"} = "rsvg-view" if (!($system_release =~ /Tumbleweed/));
478
479 my @suse_tex_pkgs = (
480 "texlive-babel-english",
481 "texlive-caption",
482 "texlive-colortbl",
483 "texlive-courier",
484 "texlive-dvips",
485 "texlive-helvetic",
486 "texlive-makeindex",
487 "texlive-metafont",
488 "texlive-metapost",
489 "texlive-palatino",
490 "texlive-preview",
491 "texlive-times",
492 "texlive-zapfchan",
493 "texlive-zapfding",
494 );
495
496 $map{"latexmk"} = "texlive-latexmk-bin";
497
498 # FIXME: add support for installing CJK fonts
499 #
500 # I tried hard, but was unable to find a way to install
501 # "Noto Sans CJK SC" on openSUSE
502
503 check_rpm_missing(\@suse_tex_pkgs, 2) if ($pdf);
504 check_missing_tex(2) if ($pdf);
505 check_missing(\%map);
506
507 return if (!$need && !$optional);
508 printf("You should run:\n\n\tsudo zypper install --no-recommends $install\n");
509}
510
511sub give_mageia_hints()
512{
513 my %map = (
514 "python-sphinx" => "python3-sphinx",
515 "sphinx_rtd_theme" => "python3-sphinx_rtd_theme",
516 "virtualenv" => "python3-virtualenv",
517 "dot" => "graphviz",
518 "convert" => "ImageMagick",
519 "Pod::Usage" => "perl-Pod-Usage",
520 "xelatex" => "texlive",
521 "rsvg-convert" => "librsvg2",
522 );
523
524 my @tex_pkgs = (
525 "texlive-fontsextra",
526 );
527
528 $map{"latexmk"} = "texlive-collection-basic";
529
530 my $packager_cmd;
531 my $noto_sans;
532 if ($system_release =~ /OpenMandriva/) {
533 $packager_cmd = "dnf install";
534 $noto_sans = "noto-sans-cjk-fonts";
535 @tex_pkgs = ( "texlive-collection-fontsextra" );
536 } else {
537 $packager_cmd = "urpmi";
538 $noto_sans = "google-noto-sans-cjk-ttc-fonts";
539 }
540
541
542 if ($pdf) {
543 check_missing_file(["/usr/share/fonts/google-noto-cjk/NotoSansCJK-Regular.ttc",
544 "/usr/share/fonts/TTF/NotoSans-Regular.ttf"],
545 $noto_sans, 2);
546 }
547
548 check_rpm_missing(\@tex_pkgs, 2) if ($pdf);
549 check_missing(\%map);
550
551 return if (!$need && !$optional);
552 printf("You should run:\n\n\tsudo $packager_cmd $install\n");
553}
554
555sub give_arch_linux_hints()
556{
557 my %map = (
558 "sphinx_rtd_theme" => "python-sphinx_rtd_theme",
559 "virtualenv" => "python-virtualenv",
560 "dot" => "graphviz",
561 "convert" => "imagemagick",
562 "xelatex" => "texlive-bin",
563 "latexmk" => "texlive-core",
564 "rsvg-convert" => "extra/librsvg",
565 );
566
567 my @archlinux_tex_pkgs = (
568 "texlive-core",
569 "texlive-latexextra",
570 "ttf-dejavu",
571 );
572 check_pacman_missing(\@archlinux_tex_pkgs, 2) if ($pdf);
573
574 if ($pdf) {
575 check_missing_file(["/usr/share/fonts/noto-cjk/NotoSansCJK-Regular.ttc"],
576 "noto-fonts-cjk", 2);
577 }
578
579 check_missing(\%map);
580
581 return if (!$need && !$optional);
582 printf("You should run:\n\n\tsudo pacman -S $install\n");
583}
584
585sub give_gentoo_hints()
586{
587 my %map = (
588 "sphinx_rtd_theme" => "dev-python/sphinx_rtd_theme",
589 "virtualenv" => "dev-python/virtualenv",
590 "dot" => "media-gfx/graphviz",
591 "convert" => "media-gfx/imagemagick",
592 "xelatex" => "dev-texlive/texlive-xetex media-fonts/dejavu",
593 "rsvg-convert" => "gnome-base/librsvg",
594 );
595
596 check_missing_file(["/usr/share/fonts/dejavu/DejaVuSans.ttf"],
597 "media-fonts/dejavu", 2) if ($pdf);
598
599 if ($pdf) {
600 check_missing_file(["/usr/share/fonts/noto-cjk/NotoSansCJKsc-Regular.otf",
601 "/usr/share/fonts/noto-cjk/NotoSerifCJK-Regular.ttc"],
602 "media-fonts/noto-cjk", 2);
603 }
604
605 check_missing(\%map);
606
607 return if (!$need && !$optional);
608
609 printf("You should run:\n\n");
610
611 my $imagemagick = "media-gfx/imagemagick svg png";
612 my $cairo = "media-gfx/graphviz cairo pdf";
613 my $portage_imagemagick = "/etc/portage/package.use/imagemagick";
614 my $portage_cairo = "/etc/portage/package.use/graphviz";
615
616 if (qx(grep imagemagick $portage_imagemagick 2>/dev/null) eq "") {
617 printf("\tsudo su -c 'echo \"$imagemagick\" > $portage_imagemagick'\n")
618 }
619 if (qx(grep graphviz $portage_cairo 2>/dev/null) eq "") {
620 printf("\tsudo su -c 'echo \"$cairo\" > $portage_cairo'\n");
621 }
622
623 printf("\tsudo emerge --ask $install\n");
624
625}
626
627sub check_distros()
628{
629 # Distro-specific hints
630 if ($system_release =~ /Red Hat Enterprise Linux/) {
631 give_redhat_hints;
632 return;
633 }
634 if ($system_release =~ /CentOS/) {
635 give_redhat_hints;
636 return;
637 }
638 if ($system_release =~ /Scientific Linux/) {
639 give_redhat_hints;
640 return;
641 }
642 if ($system_release =~ /Oracle Linux Server/) {
643 give_redhat_hints;
644 return;
645 }
646 if ($system_release =~ /Fedora/) {
647 give_redhat_hints;
648 return;
649 }
650 if ($system_release =~ /Ubuntu/) {
651 give_debian_hints;
652 return;
653 }
654 if ($system_release =~ /Debian/) {
655 give_debian_hints;
656 return;
657 }
658 if ($system_release =~ /openSUSE/) {
659 give_opensuse_hints;
660 return;
661 }
662 if ($system_release =~ /Mageia/) {
663 give_mageia_hints;
664 return;
665 }
666 if ($system_release =~ /OpenMandriva/) {
667 give_mageia_hints;
668 return;
669 }
670 if ($system_release =~ /Arch Linux/) {
671 give_arch_linux_hints;
672 return;
673 }
674 if ($system_release =~ /Gentoo/) {
675 give_gentoo_hints;
676 return;
677 }
678
679 #
680 # Fall-back to generic hint code for other distros
681 # That's far from ideal, specially for LaTeX dependencies.
682 #
683 my %map = (
684 "sphinx-build" => "sphinx"
685 );
686 check_missing_tex(2) if ($pdf);
687 check_missing(\%map);
688 print "I don't know distro $system_release.\n";
689 print "So, I can't provide you a hint with the install procedure.\n";
690 print "There are likely missing dependencies.\n";
691}
692
693#
694# Common dependencies
695#
696
697sub deactivate_help()
698{
699 printf "\nIf you want to exit the virtualenv, you can use:\n";
700 printf "\tdeactivate\n";
701}
702
703sub get_virtenv()
704{
705 my $ver;
706 my $min_activate = "$ENV{'PWD'}/${virtenv_prefix}${min_version}/bin/activate";
707 my @activates = glob "$ENV{'PWD'}/${virtenv_prefix}*/bin/activate";
708
709 @activates = sort {$b cmp $a} @activates;
710
711 foreach my $f (@activates) {
712 next if ($f lt $min_activate);
713
714 my $sphinx_cmd = $f;
715 $sphinx_cmd =~ s/activate/sphinx-build/;
716 next if (! -f $sphinx_cmd);
717
718 my $ver = get_sphinx_version($sphinx_cmd);
719 if ($need_sphinx && ($ver ge $min_version)) {
720 return ($f, $ver);
721 } elsif ($ver gt $cur_version) {
722 return ($f, $ver);
723 }
724 }
725 return ("", "");
726}
727
728sub recommend_sphinx_upgrade()
729{
730 my $venv_ver;
731
732 # Avoid running sphinx-builds from venv if $cur_version is good
733 if ($cur_version && ($cur_version ge $rec_version)) {
734 $latest_avail_ver = $cur_version;
735 return;
736 }
737
738 # Get the highest version from sphinx_*/bin/sphinx-build and the
739 # corresponding command to activate the venv/virtenv
740 $activate_cmd = get_virtenv();
741
742 # Store the highest version from Sphinx existing virtualenvs
743 if (($activate_cmd ne "") && ($venv_ver gt $cur_version)) {
744 $latest_avail_ver = $venv_ver;
745 } else {
746 $latest_avail_ver = $cur_version if ($cur_version);
747 }
748
749 # As we don't know package version of Sphinx, and there's no
750 # virtual environments, don't check if upgrades are needed
751 if (!$virtualenv) {
752 return if (!$latest_avail_ver);
753 }
754
755 # Either there are already a virtual env or a new one should be created
756 $need_pip = 1;
757
758 # Return if the reason is due to an upgrade or not
759 if ($latest_avail_ver lt $rec_version) {
760 $rec_sphinx_upgrade = 1;
761 }
762}
763
764#
765# The logic here is complex, as it have to deal with different versions:
766# - minimal supported version;
767# - minimal PDF version;
768# - recommended version.
769# It also needs to work fine with both distro's package and venv/virtualenv
770sub recommend_sphinx_version($)
771{
772 my $virtualenv_cmd = shift;
773
774 if ($latest_avail_ver lt $min_pdf_version) {
775 print "note: If you want pdf, you need at least Sphinx $min_pdf_version.\n";
776 }
777
778 # Version is OK. Nothing to do.
779 return if ($cur_version && ($cur_version ge $rec_version));
780
781 if (!$need_sphinx) {
782 # sphinx-build is present and its version is >= $min_version
783
784 #only recommend enabling a newer virtenv version if makes sense.
785 if ($latest_avail_ver gt $cur_version) {
786 printf "\nYou may also use the newer Sphinx version $latest_avail_ver with:\n";
787 printf "\tdeactivate\n" if ($ENV{'PWD'} =~ /${virtenv_prefix}/);
788 printf "\t. $activate_cmd\n";
789 deactivate_help();
790
791 return;
792 }
793 return if ($latest_avail_ver ge $rec_version);
794 }
795
796 if (!$virtualenv) {
797 # No sphinx either via package or via virtenv. As we can't
798 # Compare the versions here, just return, recommending the
799 # user to install it from the package distro.
800 return if (!$latest_avail_ver);
801
802 # User doesn't want a virtenv recommendation, but he already
803 # installed one via virtenv with a newer version.
804 # So, print commands to enable it
805 if ($latest_avail_ver gt $cur_version) {
806 printf "\nYou may also use the Sphinx virtualenv version $latest_avail_ver with:\n";
807 printf "\tdeactivate\n" if ($ENV{'PWD'} =~ /${virtenv_prefix}/);
808 printf "\t. $activate_cmd\n";
809 deactivate_help();
810
811 return;
812 }
813 print "\n";
814 } else {
815 $need++ if ($need_sphinx);
816 }
817
818 # Suggest newer versions if current ones are too old
819 if ($latest_avail_ver && $cur_version ge $min_version) {
820 # If there's a good enough version, ask the user to enable it
821 if ($latest_avail_ver ge $rec_version) {
822 printf "\nNeed to activate Sphinx (version $latest_avail_ver) on virtualenv with:\n";
823 printf "\t. $activate_cmd\n";
824 deactivate_help();
825
826 return;
827 }
828
829 # Version is above the minimal required one, but may be
830 # below the recommended one. So, print warnings/notes
831
832 if ($latest_avail_ver lt $rec_version) {
833 print "Warning: It is recommended at least Sphinx version $rec_version.\n";
834 }
835 }
836
837 # At this point, either it needs Sphinx or upgrade is recommended,
838 # both via pip
839
840 if ($rec_sphinx_upgrade) {
841 if (!$virtualenv) {
842 print "Instead of install/upgrade Python Sphinx pkg, you could use pip/pypi with:\n\n";
843 } else {
844 print "To upgrade Sphinx, use:\n\n";
845 }
846 } else {
847 print "Sphinx needs to be installed either as a package or via pip/pypi with:\n";
848 }
849
850 $python_cmd = find_python_no_venv();
851
852 printf "\t$virtualenv_cmd $virtenv_dir\n";
853
854 printf "\t. $virtenv_dir/bin/activate\n";
855 printf "\tpip install -r $requirement_file\n";
856 deactivate_help();
857}
858
859sub check_needs()
860{
861 # Check if Sphinx is already accessible from current environment
862 check_sphinx();
863
864 if ($system_release) {
865 print "Detected OS: $system_release.\n";
866 } else {
867 print "Unknown OS\n";
868 }
869 printf "Sphinx version: %s\n\n", $cur_version if ($cur_version);
870
871 # Check python command line, trying first python3
872 $python_cmd = findprog("python3");
873 $python_cmd = check_program("python", 0) if (!$python_cmd);
874
875 # Check the type of virtual env, depending on Python version
876 if ($python_cmd) {
877 if ($virtualenv) {
878 my $tmp = qx($python_cmd --version 2>&1);
879 if ($tmp =~ m/(\d+\.)(\d+\.)/) {
880 if ($1 < 3) {
881 # Fail if it finds python2 (or worse)
882 die "Python 3 is required to build the kernel docs\n";
883 }
884 if ($1 == 3 && $2 < 3) {
885 # Need Python 3.3 or upper for venv
886 $need_virtualenv = 1;
887 }
888 } else {
889 die "Warning: couldn't identify $python_cmd version!";
890 }
891 } else {
892 add_package("python-sphinx", 0);
893 }
894 }
895
896 recommend_sphinx_upgrade();
897
898 my $virtualenv_cmd;
899
900 if ($need_pip) {
901 # Set virtualenv command line, if python < 3.3
902 if ($need_virtualenv) {
903 $virtualenv_cmd = findprog("virtualenv-3");
904 $virtualenv_cmd = findprog("virtualenv-3.5") if (!$virtualenv_cmd);
905 if (!$virtualenv_cmd) {
906 check_program("virtualenv", 0);
907 $virtualenv_cmd = "virtualenv";
908 }
909 } else {
910 $virtualenv_cmd = "$python_cmd -m venv";
911 check_python_module("ensurepip", 0);
912 }
913 }
914
915 # Check for needed programs/tools
916 check_perl_module("Pod::Usage", 0);
917 check_program("make", 0);
918 check_program("gcc", 0);
919 check_python_module("sphinx_rtd_theme", 1) if (!$virtualenv);
920 check_program("dot", 1);
921 check_program("convert", 1);
922
923 # Extra PDF files - should use 2 for is_optional
924 check_program("xelatex", 2) if ($pdf);
925 check_program("rsvg-convert", 2) if ($pdf);
926 check_program("latexmk", 2) if ($pdf);
927
928 # Do distro-specific checks and output distro-install commands
929 check_distros();
930
931 if (!$python_cmd) {
932 if ($need == 1) {
933 die "Can't build as $need mandatory dependency is missing";
934 } elsif ($need) {
935 die "Can't build as $need mandatory dependencies are missing";
936 }
937 }
938
939 # Check if sphinx-build is called sphinx-build-3
940 if ($need_symlink) {
941 printf "\tsudo ln -sf %s /usr/bin/sphinx-build\n\n",
942 which("sphinx-build-3");
943 }
944
945 recommend_sphinx_version($virtualenv_cmd);
946 printf "\n";
947
948 print "All optional dependencies are met.\n" if (!$optional);
949
950 if ($need == 1) {
951 die "Can't build as $need mandatory dependency is missing";
952 } elsif ($need) {
953 die "Can't build as $need mandatory dependencies are missing";
954 }
955
956 print "Needed package dependencies are met.\n";
957}
958
959#
960# Main
961#
962
963while (@ARGV) {
964 my $arg = shift(@ARGV);
965
966 if ($arg eq "--no-virtualenv") {
967 $virtualenv = 0;
968 } elsif ($arg eq "--no-pdf"){
969 $pdf = 0;
970 } elsif ($arg eq "--version-check"){
971 $version_check = 1;
972 } else {
973 print "Usage:\n\t$0 <--no-virtualenv> <--no-pdf> <--version-check>\n\n";
974 print "Where:\n";
975 print "\t--no-virtualenv\t- Recommend installing Sphinx instead of using a virtualenv\n";
976 print "\t--version-check\t- if version is compatible, don't check for missing dependencies\n";
977 print "\t--no-pdf\t- don't check for dependencies required to build PDF docs\n\n";
978 exit -1;
979 }
980}
981
982#
983# Determine the system type. There's no standard unique way that would
984# work with all distros with a minimal package install. So, several
985# methods are used here.
986#
987# By default, it will use lsb_release function. If not available, it will
988# fail back to reading the known different places where the distro name
989# is stored
990#
991
992$system_release = qx(lsb_release -d) if which("lsb_release");
993$system_release =~ s/Description:\s*// if ($system_release);
994$system_release = catcheck("/etc/system-release") if !$system_release;
995$system_release = catcheck("/etc/redhat-release") if !$system_release;
996$system_release = catcheck("/etc/lsb-release") if !$system_release;
997$system_release = catcheck("/etc/gentoo-release") if !$system_release;
998
999# This seems more common than LSB these days
1000if (!$system_release) {
1001 my %os_var;
1002 if (open IN, "cat /etc/os-release|") {
1003 while (<IN>) {
1004 if (m/^([\w\d\_]+)=\"?([^\"]*)\"?\n/) {
1005 $os_var{$1}=$2;
1006 }
1007 }
1008 $system_release = $os_var{"NAME"};
1009 if (defined($os_var{"VERSION_ID"})) {
1010 $system_release .= " " . $os_var{"VERSION_ID"} if (defined($os_var{"VERSION_ID"}));
1011 } else {
1012 $system_release .= " " . $os_var{"VERSION"};
1013 }
1014 }
1015}
1016$system_release = catcheck("/etc/issue") if !$system_release;
1017$system_release =~ s/\s+$//;
1018
1019check_needs;