mirror of
https://github.com/containers/podman
synced 2024-10-20 17:23:30 +00:00
81005f463e
New hack/xref-helpmsgs-manpages script, added to CI 'gate' task, runs 'podman [subcommand] --help' and cross-references against man pages in docs/source/markdown/podman*.1.md See #5453 and #5460 for instances of the problems the script has found. The careful reader will find an alarming number of special-case bypasses. These are a tradeoff I am making: to get perfect coverage with no handwaving, it would be necessary to make drastic changes to some man pages, and I believe those would be counterproductive. Signed-off-by: Ed Santiago <santiago@redhat.com>
308 lines
9.2 KiB
Perl
Executable file
308 lines
9.2 KiB
Perl
Executable file
#!/usr/bin/perl
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#
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# xref-helpmsgs-manpages - cross-reference --help options against man pages
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#
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package LibPod::CI::XrefHelpmsgsManpages;
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use v5.14;
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use utf8;
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use strict;
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use warnings;
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(our $ME = $0) =~ s|.*/||;
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our $VERSION = '0.1';
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# For debugging, show data structures using DumpTree($var)
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#use Data::TreeDumper; $Data::TreeDumper::Displayaddress = 0;
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###############################################################################
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# BEGIN user-customizable section
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# Path to podman executable
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my $Default_Podman = './bin/podman';
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my $PODMAN = $ENV{PODMAN} || $Default_Podman;
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# Path to podman markdown source files (of the form podman-*.1.md)
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my $Markdown_Path = 'docs/source/markdown';
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# END user-customizable section
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###############################################################################
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use FindBin;
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###############################################################################
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# BEGIN boilerplate args checking, usage messages
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sub usage {
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print <<"END_USAGE";
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Usage: $ME [OPTIONS]
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$ME recursively runs 'podman --help' against
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all subcommands; and recursively reads podman-*.1.md files
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in $Markdown_Path, then cross-references that each --help
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option is listed in the appropriate man page and vice-versa.
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$ME invokes '\$PODMAN' (default: $Default_Podman).
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Exit status is zero if no inconsistencies found, one otherwise
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OPTIONS:
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-v, --verbose show verbose progress indicators
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-n, --dry-run make no actual changes
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--help display this message
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--version display program name and version
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END_USAGE
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exit;
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}
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# Command-line options. Note that this operates directly on @ARGV !
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our $debug = 0;
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our $verbose = 0;
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sub handle_opts {
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use Getopt::Long;
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GetOptions(
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'debug!' => \$debug,
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'verbose|v' => \$verbose,
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help => \&usage,
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version => sub { print "$ME version $VERSION\n"; exit 0 },
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) or die "Try `$ME --help' for help\n";
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}
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# END boilerplate args checking, usage messages
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###############################################################################
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############################## CODE BEGINS HERE ###############################
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# The term is "modulino".
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__PACKAGE__->main() unless caller();
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# Main code.
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sub main {
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# Note that we operate directly on @ARGV, not on function parameters.
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# This is deliberate: it's because Getopt::Long only operates on @ARGV
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# and there's no clean way to make it use @_.
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handle_opts(); # will set package globals
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# Fetch command-line arguments. Barf if too many.
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die "$ME: Too many arguments; try $ME --help\n" if @ARGV;
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my $help = podman_help();
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my $man = podman_man('podman');
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my $retval = xref_by_help($help, $man)
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+ xref_by_man($help, $man);
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exit !!$retval;
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}
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##################
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# xref_by_help # Find keys in '--help' but not in man
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##################
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sub xref_by_help {
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my ($help, $man, @subcommand) = @_;
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my $errs = 0;
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for my $k (sort keys %$help) {
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if (exists $man->{$k}) {
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if (ref $help->{$k}) {
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$errs += xref_by_help($help->{$k}, $man->{$k}, @subcommand, $k);
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}
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# Otherwise, non-ref is leaf node such as a --option
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}
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else {
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my $man = $man->{_path} || 'man';
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warn "$ME: podman @subcommand --help lists $k, but $k not in $man\n";
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++$errs;
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}
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}
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return $errs;
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}
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#################
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# xref_by_man # Find keys in man pages but not in --help
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#################
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#
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# In an ideal world we could share the functionality in one function; but
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# there are just too many special cases in man pages.
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#
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sub xref_by_man {
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my ($help, $man, @subcommand) = @_;
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my $errs = 0;
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# FIXME: this generates way too much output
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for my $k (grep { $_ ne '_path' } sort keys %$man) {
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if (exists $help->{$k}) {
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if (ref $man->{$k}) {
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$errs += xref_by_man($help->{$k}, $man->{$k}, @subcommand, $k);
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}
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}
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elsif ($k ne '--help' && $k ne '-h') {
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my $man = $man->{_path} || 'man';
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# Special case: podman-inspect serves dual purpose (image, ctr)
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my %ignore = map { $_ => 1 } qw(-l -s -t --latest --size --type);
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next if $man =~ /-inspect/ && $ignore{$k};
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# Special case: the 'trust' man page is a mess
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next if $man =~ /-trust/;
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# Special case: '--net' is an undocumented shortcut
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next if $k eq '--net' && $help->{'--network'};
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# Special case: these are actually global options
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next if $k =~ /^--(cni-config-dir|runtime)$/ && $man =~ /-build/;
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# Special case: weirdness with Cobra and global/local options
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next if $k eq '--namespace' && $man =~ /-ps/;
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# Special case: these require compiling with 'varlink' tag,
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# which doesn't happen in CI gating task.
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next if $k eq 'varlink';
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next if "@subcommand" eq 'system' && $k eq 'service';
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warn "$ME: podman @subcommand: $k in $man, but not --help\n";
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++$errs;
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}
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}
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return $errs;
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}
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#################
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# podman_help # Parse output of 'podman [subcommand] --help'
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#################
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sub podman_help {
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my %help;
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open my $fh, '-|', $PODMAN, @_, '--help'
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or die "$ME: Cannot fork: $!\n";
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my $section = '';
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while (my $line = <$fh>) {
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# Cobra is blessedly consistent in its output:
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# Usage: ...
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# Available Commands:
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# ....
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# Flags:
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# ....
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#
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# Start by identifying the section we're in...
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if ($line =~ /^Available\s+(Commands):/) {
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$section = lc $1;
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}
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elsif ($line =~ /^(Flags):/) {
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$section = lc $1;
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}
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# ...then track commands and options. For subcommands, recurse.
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elsif ($section eq 'commands') {
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if ($line =~ /^\s{1,4}(\S+)\s/) {
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my $subcommand = $1;
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print "> podman @_ $subcommand\n" if $debug;
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$help{$subcommand} = podman_help(@_, $subcommand)
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unless $subcommand eq 'help'; # 'help' not in man
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}
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}
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elsif ($section eq 'flags') {
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# Handle '--foo' or '-f, --foo'
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if ($line =~ /^\s{1,10}(--\S+)\s/) {
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print "> podman @_ $1\n" if $debug;
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$help{$1} = 1;
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}
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elsif ($line =~ /^\s{1,10}(-\S),\s+(--\S+)\s/) {
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print "> podman @_ $1, $2\n" if $debug;
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$help{$1} = $help{$2} = 1;
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}
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}
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}
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close $fh
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or die "$ME: Error running 'podman @_ --help'\n";
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return \%help;
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}
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################
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# podman_man # Parse contents of podman-*.1.md
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################
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sub podman_man {
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my $command = shift;
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my $subpath = "$Markdown_Path/$command.1.md";
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my $manpath = "$FindBin::Bin/../$subpath";
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print "** $subpath \n" if $debug;
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my %man = (_path => $subpath);
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open my $fh, '<', $manpath
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or die "$ME: Cannot read $manpath: $!\n";
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my $section = '';
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my @most_recent_flags;
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while (my $line = <$fh>) {
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chomp $line;
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next unless $line; # skip empty lines
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# .md files designate sections with leading double hash
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if ($line =~ /^##\s*(GLOBAL\s+)?OPTIONS/) {
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$section = 'flags';
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}
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elsif ($line =~ /^\#\#\s+(SUB)?COMMANDS/) {
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$section = 'commands';
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}
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elsif ($line =~ /^\#\#/) {
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$section = '';
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}
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# This will be a table containing subcommand names, links to man pages.
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# The format is slightly different between podman.1.md and subcommands.
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elsif ($section eq 'commands') {
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# In podman.1.md
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if ($line =~ /^\|\s*\[podman-(\S+?)\(\d\)\]/) {
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$man{$1} = podman_man("podman-$1");
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}
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# In podman-<subcommand>.1.md
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elsif ($line =~ /^\|\s+(\S+)\s+\|\s+\[\S+\]\((\S+)\.1\.md\)/) {
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$man{$1} = podman_man($2);
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}
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}
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# Flags should always be of the form '**-f**' or '**--flag**',
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# possibly separated by comma-space.
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elsif ($section eq 'flags') {
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# e.g. 'podman run --ip6', documented in man page, but nonexistent
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if ($line =~ /^not\s+implemented/i) {
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delete $man{$_} for @most_recent_flags;
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}
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@most_recent_flags = ();
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# Handle any variation of '**--foo**, **-f**'
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while ($line =~ s/^\*\*((--[a-z0-9-]+)|(-.))\*\*(,\s+)?//g) {
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$man{$1} = 1;
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# Keep track of them, in case we see 'Not implemented' below
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push @most_recent_flags, $1;
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}
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}
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}
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close $fh;
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# Special case: the 'image trust' man page tries hard to cover both set
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# and show, which means it ends up not being machine-readable.
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if ($command eq 'podman-image-trust') {
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my %set = %man;
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my %show = %man;
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$show{$_} = 1 for qw(--raw -j --json);
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return +{ set => \%set, show => \%show }
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}
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return \%man;
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}
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1;
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