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1 | package PVE::CLIHandler; | |
2 | ||
3 | use strict; | |
4 | use warnings; | |
5 | ||
6 | use PVE::SafeSyslog; | |
7 | use PVE::Exception qw(raise raise_param_exc); | |
8 | use PVE::RESTHandler; | |
9 | use PVE::INotify; | |
10 | ||
11 | use base qw(PVE::RESTHandler); | |
12 | ||
13 | my $cmddef; | |
14 | my $exename; | |
15 | my $cli_handler_class; | |
16 | ||
17 | my $assert_initialized = sub { | |
18 | my @caller = caller; | |
19 | die "$caller[0]:$caller[2] - not initialized\n" | |
20 | if !($cmddef && $exename && $cli_handler_class); | |
21 | }; | |
22 | ||
23 | my $expand_command_name = sub { | |
24 | my ($def, $cmd) = @_; | |
25 | ||
26 | if (!$def->{$cmd}) { | |
27 | my $expanded; | |
28 | for my $k (keys(%$def)) { | |
29 | if ($k =~ m/^$cmd/) { | |
30 | if ($expanded) { | |
31 | $expanded = undef; # more than one match | |
32 | last; | |
33 | } else { | |
34 | $expanded = $k; | |
35 | } | |
36 | } | |
37 | } | |
38 | $cmd = $expanded if $expanded; | |
39 | } | |
40 | return $cmd; | |
41 | }; | |
42 | ||
43 | my $complete_command_names = sub { | |
44 | my $res = []; | |
45 | ||
46 | return if ref($cmddef) ne 'HASH'; | |
47 | ||
48 | foreach my $cmd (keys %$cmddef) { | |
49 | next if $cmd eq 'help'; | |
50 | push @$res, $cmd; | |
51 | } | |
52 | ||
53 | return $res; | |
54 | }; | |
55 | ||
56 | __PACKAGE__->register_method ({ | |
57 | name => 'help', | |
58 | path => 'help', | |
59 | method => 'GET', | |
60 | description => "Get help about specified command.", | |
61 | parameters => { | |
62 | additionalProperties => 0, | |
63 | properties => { | |
64 | cmd => { | |
65 | description => "Command name", | |
66 | type => 'string', | |
67 | optional => 1, | |
68 | completion => $complete_command_names, | |
69 | }, | |
70 | verbose => { | |
71 | description => "Verbose output format.", | |
72 | type => 'boolean', | |
73 | optional => 1, | |
74 | }, | |
75 | }, | |
76 | }, | |
77 | returns => { type => 'null' }, | |
78 | ||
79 | code => sub { | |
80 | my ($param) = @_; | |
81 | ||
82 | $assert_initialized->(); | |
83 | ||
84 | my $cmd = $param->{cmd}; | |
85 | ||
86 | my $verbose = defined($cmd) && $cmd; | |
87 | $verbose = $param->{verbose} if defined($param->{verbose}); | |
88 | ||
89 | if (!$cmd) { | |
90 | if ($verbose) { | |
91 | print_usage_verbose(); | |
92 | } else { | |
93 | print_usage_short(\*STDOUT); | |
94 | } | |
95 | return undef; | |
96 | } | |
97 | ||
98 | $cmd = &$expand_command_name($cmddef, $cmd); | |
99 | ||
100 | my ($class, $name, $arg_param, $uri_param) = @{$cmddef->{$cmd} || []}; | |
101 | ||
102 | raise_param_exc({ cmd => "no such command '$cmd'"}) if !$class; | |
103 | ||
104 | my $pwcallback = $cli_handler_class->can('read_password'); | |
105 | my $stringfilemap = $cli_handler_class->can('string_param_file_mapping'); | |
106 | ||
107 | my $str = $class->usage_str($name, "$exename $cmd", $arg_param, $uri_param, | |
108 | $verbose ? 'full' : 'short', $pwcallback, | |
109 | $stringfilemap); | |
110 | if ($verbose) { | |
111 | print "$str\n"; | |
112 | } else { | |
113 | print "USAGE: $str\n"; | |
114 | } | |
115 | ||
116 | return undef; | |
117 | ||
118 | }}); | |
119 | ||
120 | sub print_simple_asciidoc_synopsis { | |
121 | my ($class, $name, $arg_param, $uri_param) = @_; | |
122 | ||
123 | $assert_initialized->(); | |
124 | ||
125 | my $pwcallback = $cli_handler_class->can('read_password'); | |
126 | my $stringfilemap = $cli_handler_class->can('string_param_file_mapping'); | |
127 | ||
128 | my $synopsis = "*${name}* `help`\n\n"; | |
129 | ||
130 | $synopsis .= $class->usage_str($name, $name, $arg_param, $uri_param, | |
131 | 'asciidoc', $pwcallback, $stringfilemap); | |
132 | ||
133 | return $synopsis; | |
134 | } | |
135 | ||
136 | sub print_asciidoc_synopsis { | |
137 | ||
138 | $assert_initialized->(); | |
139 | ||
140 | my $pwcallback = $cli_handler_class->can('read_password'); | |
141 | my $stringfilemap = $cli_handler_class->can('string_param_file_mapping'); | |
142 | ||
143 | my $synopsis = ""; | |
144 | ||
145 | $synopsis .= "*${exename}* `<COMMAND> [ARGS] [OPTIONS]`\n\n"; | |
146 | ||
147 | my $oldclass; | |
148 | foreach my $cmd (sort keys %$cmddef) { | |
149 | my ($class, $name, $arg_param, $uri_param) = @{$cmddef->{$cmd}}; | |
150 | my $str = $class->usage_str($name, "$exename $cmd", $arg_param, | |
151 | $uri_param, 'asciidoc', $pwcallback, | |
152 | $stringfilemap); | |
153 | $synopsis .= "\n" if $oldclass && $oldclass ne $class; | |
154 | ||
155 | $synopsis .= "$str\n\n"; | |
156 | $oldclass = $class; | |
157 | } | |
158 | ||
159 | $synopsis .= "\n"; | |
160 | ||
161 | return $synopsis; | |
162 | } | |
163 | ||
164 | sub print_usage_verbose { | |
165 | ||
166 | $assert_initialized->(); | |
167 | ||
168 | my $pwcallback = $cli_handler_class->can('read_password'); | |
169 | my $stringfilemap = $cli_handler_class->can('string_param_file_mapping'); | |
170 | ||
171 | print "USAGE: $exename <COMMAND> [ARGS] [OPTIONS]\n\n"; | |
172 | ||
173 | foreach my $cmd (sort keys %$cmddef) { | |
174 | my ($class, $name, $arg_param, $uri_param) = @{$cmddef->{$cmd}}; | |
175 | my $str = $class->usage_str($name, "$exename $cmd", $arg_param, $uri_param, | |
176 | 'full', $pwcallback, $stringfilemap); | |
177 | print "$str\n\n"; | |
178 | } | |
179 | } | |
180 | ||
181 | sub sorted_commands { | |
182 | return sort { ($cmddef->{$a}->[0] cmp $cmddef->{$b}->[0]) || ($a cmp $b)} keys %$cmddef; | |
183 | } | |
184 | ||
185 | sub print_usage_short { | |
186 | my ($fd, $msg) = @_; | |
187 | ||
188 | $assert_initialized->(); | |
189 | ||
190 | my $pwcallback = $cli_handler_class->can('read_password'); | |
191 | my $stringfilemap = $cli_handler_class->can('string_param_file_mapping'); | |
192 | ||
193 | print $fd "ERROR: $msg\n" if $msg; | |
194 | print $fd "USAGE: $exename <COMMAND> [ARGS] [OPTIONS]\n"; | |
195 | ||
196 | my $oldclass; | |
197 | foreach my $cmd (sorted_commands()) { | |
198 | my ($class, $name, $arg_param, $uri_param) = @{$cmddef->{$cmd}}; | |
199 | my $str = $class->usage_str($name, "$exename $cmd", $arg_param, $uri_param, 'short', $pwcallback, $stringfilemap); | |
200 | print $fd "\n" if $oldclass && $oldclass ne $class; | |
201 | print $fd " $str"; | |
202 | $oldclass = $class; | |
203 | } | |
204 | } | |
205 | ||
206 | my $print_bash_completion = sub { | |
207 | my ($simple_cmd, $bash_command, $cur, $prev) = @_; | |
208 | ||
209 | my $debug = 0; | |
210 | ||
211 | return if !(defined($cur) && defined($prev) && defined($bash_command)); | |
212 | return if !defined($ENV{COMP_LINE}); | |
213 | return if !defined($ENV{COMP_POINT}); | |
214 | ||
215 | my $cmdline = substr($ENV{COMP_LINE}, 0, $ENV{COMP_POINT}); | |
216 | print STDERR "\nCMDLINE: $ENV{COMP_LINE}\n" if $debug; | |
217 | ||
218 | my $args = PVE::Tools::split_args($cmdline); | |
219 | my $pos = scalar(@$args) - 2; | |
220 | $pos += 1 if $cmdline =~ m/\s+$/; | |
221 | ||
222 | print STDERR "CMDLINE:$pos:$cmdline\n" if $debug; | |
223 | ||
224 | return if $pos < 0; | |
225 | ||
226 | my $print_result = sub { | |
227 | foreach my $p (@_) { | |
228 | print "$p\n" if $p =~ m/^$cur/; | |
229 | } | |
230 | }; | |
231 | ||
232 | my $cmd; | |
233 | if ($simple_cmd) { | |
234 | $cmd = $simple_cmd; | |
235 | } else { | |
236 | if ($pos == 0) { | |
237 | &$print_result(keys %$cmddef); | |
238 | return; | |
239 | } | |
240 | $cmd = $args->[1]; | |
241 | } | |
242 | ||
243 | my $def = $cmddef->{$cmd}; | |
244 | return if !$def; | |
245 | ||
246 | print STDERR "CMDLINE1:$pos:$cmdline\n" if $debug; | |
247 | ||
248 | my $skip_param = {}; | |
249 | ||
250 | my ($class, $name, $arg_param, $uri_param) = @$def; | |
251 | $arg_param //= []; | |
252 | $uri_param //= {}; | |
253 | ||
254 | $arg_param = [ $arg_param ] if !ref($arg_param); | |
255 | ||
256 | map { $skip_param->{$_} = 1; } @$arg_param; | |
257 | map { $skip_param->{$_} = 1; } keys %$uri_param; | |
258 | ||
259 | my $fpcount = scalar(@$arg_param); | |
260 | ||
261 | my $info = $class->map_method_by_name($name); | |
262 | ||
263 | my $schema = $info->{parameters}; | |
264 | my $prop = $schema->{properties}; | |
265 | ||
266 | my $print_parameter_completion = sub { | |
267 | my ($pname) = @_; | |
268 | my $d = $prop->{$pname}; | |
269 | if ($d->{completion}) { | |
270 | my $vt = ref($d->{completion}); | |
271 | if ($vt eq 'CODE') { | |
272 | my $res = $d->{completion}->($cmd, $pname, $cur, $args); | |
273 | &$print_result(@$res); | |
274 | } | |
275 | } elsif ($d->{type} eq 'boolean') { | |
276 | &$print_result('0', '1'); | |
277 | } elsif ($d->{enum}) { | |
278 | &$print_result(@{$d->{enum}}); | |
279 | } | |
280 | }; | |
281 | ||
282 | # positional arguments | |
283 | $pos += 1 if $simple_cmd; | |
284 | if ($fpcount && $pos <= $fpcount) { | |
285 | my $pname = $arg_param->[$pos -1]; | |
286 | &$print_parameter_completion($pname); | |
287 | return; | |
288 | } | |
289 | ||
290 | my @option_list = (); | |
291 | foreach my $key (keys %$prop) { | |
292 | next if $skip_param->{$key}; | |
293 | push @option_list, "--$key"; | |
294 | } | |
295 | ||
296 | if ($cur =~ m/^-/) { | |
297 | &$print_result(@option_list); | |
298 | return; | |
299 | } | |
300 | ||
301 | if ($prev =~ m/^--?(.+)$/ && $prop->{$1}) { | |
302 | my $pname = $1; | |
303 | &$print_parameter_completion($pname); | |
304 | return; | |
305 | } | |
306 | ||
307 | &$print_result(@option_list); | |
308 | }; | |
309 | ||
310 | sub verify_api { | |
311 | my ($class) = @_; | |
312 | ||
313 | # simply verify all registered methods | |
314 | PVE::RESTHandler::validate_method_schemas(); | |
315 | } | |
316 | ||
317 | my $get_exe_name = sub { | |
318 | my ($class) = @_; | |
319 | ||
320 | my $name = $class; | |
321 | $name =~ s/^.*:://; | |
322 | $name =~ s/_/-/g; | |
323 | ||
324 | return $name; | |
325 | }; | |
326 | ||
327 | sub generate_bash_completions { | |
328 | my ($class) = @_; | |
329 | ||
330 | # generate bash completion config | |
331 | ||
332 | $exename = &$get_exe_name($class); | |
333 | ||
334 | print <<__EOD__; | |
335 | # $exename bash completion | |
336 | ||
337 | # see http://tiswww.case.edu/php/chet/bash/FAQ | |
338 | # and __ltrim_colon_completions() in /usr/share/bash-completion/bash_completion | |
339 | # this modifies global var, but I found no better way | |
340 | COMP_WORDBREAKS=\${COMP_WORDBREAKS//:} | |
341 | ||
342 | complete -o default -C '$exename bashcomplete' $exename | |
343 | __EOD__ | |
344 | } | |
345 | ||
346 | sub generate_asciidoc_synopsys { | |
347 | my ($class) = @_; | |
348 | $class->generate_asciidoc_synopsis(); | |
349 | }; | |
350 | ||
351 | sub generate_asciidoc_synopsis { | |
352 | my ($class) = @_; | |
353 | ||
354 | $cli_handler_class = $class; | |
355 | ||
356 | $exename = &$get_exe_name($class); | |
357 | ||
358 | no strict 'refs'; | |
359 | my $def = ${"${class}::cmddef"}; | |
360 | $cmddef = $def; | |
361 | ||
362 | if (ref($def) eq 'ARRAY') { | |
363 | print_simple_asciidoc_synopsis(@$def); | |
364 | } else { | |
365 | $cmddef->{help} = [ __PACKAGE__, 'help', ['cmd'] ]; | |
366 | ||
367 | print_asciidoc_synopsis(); | |
368 | } | |
369 | } | |
370 | ||
371 | # overwrite this if you want to run/setup things early | |
372 | sub setup_environment { | |
373 | my ($class) = @_; | |
374 | ||
375 | # do nothing by default | |
376 | } | |
377 | ||
378 | my $handle_cmd = sub { | |
379 | my ($args, $pwcallback, $preparefunc, $stringfilemap) = @_; | |
380 | ||
381 | $cmddef->{help} = [ __PACKAGE__, 'help', ['cmd'] ]; | |
382 | ||
383 | # call verifyapi before setup_environment(), because we do not want to | |
384 | # execute any real code in this case | |
385 | ||
386 | my $cmd = shift @$args; | |
387 | if (!$cmd) { | |
388 | print_usage_short (\*STDERR, "no command specified"); | |
389 | exit (-1); | |
390 | } elsif ($cmd eq 'verifyapi') { | |
391 | PVE::RESTHandler::validate_method_schemas(); | |
392 | return; | |
393 | } | |
394 | ||
395 | $cli_handler_class->setup_environment(); | |
396 | ||
397 | if ($cmd eq 'bashcomplete') { | |
398 | &$print_bash_completion(undef, @$args); | |
399 | return; | |
400 | } | |
401 | ||
402 | &$preparefunc() if $preparefunc; | |
403 | ||
404 | $cmd = &$expand_command_name($cmddef, $cmd); | |
405 | ||
406 | my ($class, $name, $arg_param, $uri_param, $outsub) = @{$cmddef->{$cmd} || []}; | |
407 | ||
408 | if (!$class) { | |
409 | print_usage_short (\*STDERR, "unknown command '$cmd'"); | |
410 | exit (-1); | |
411 | } | |
412 | ||
413 | my $prefix = "$exename $cmd"; | |
414 | my $res = $class->cli_handler($prefix, $name, \@ARGV, $arg_param, $uri_param, $pwcallback, $stringfilemap); | |
415 | ||
416 | &$outsub($res) if $outsub; | |
417 | }; | |
418 | ||
419 | my $handle_simple_cmd = sub { | |
420 | my ($args, $pwcallback, $preparefunc, $stringfilemap) = @_; | |
421 | ||
422 | my ($class, $name, $arg_param, $uri_param, $outsub) = @{$cmddef}; | |
423 | die "no class specified" if !$class; | |
424 | ||
425 | if (scalar(@$args) >= 1) { | |
426 | if ($args->[0] eq 'help') { | |
427 | my $str = "USAGE: $name help\n"; | |
428 | $str .= $class->usage_str($name, $name, $arg_param, $uri_param, 'long', $pwcallback, $stringfilemap); | |
429 | print STDERR "$str\n\n"; | |
430 | return; | |
431 | } elsif ($args->[0] eq 'verifyapi') { | |
432 | PVE::RESTHandler::validate_method_schemas(); | |
433 | return; | |
434 | } | |
435 | } | |
436 | ||
437 | $cli_handler_class->setup_environment(); | |
438 | ||
439 | if (scalar(@$args) >= 1) { | |
440 | if ($args->[0] eq 'bashcomplete') { | |
441 | shift @$args; | |
442 | &$print_bash_completion($name, @$args); | |
443 | return; | |
444 | } | |
445 | } | |
446 | ||
447 | &$preparefunc() if $preparefunc; | |
448 | ||
449 | my $res = $class->cli_handler($name, $name, \@ARGV, $arg_param, $uri_param, $pwcallback, $stringfilemap); | |
450 | ||
451 | &$outsub($res) if $outsub; | |
452 | }; | |
453 | ||
454 | sub run_cli_handler { | |
455 | my ($class, %params) = @_; | |
456 | ||
457 | $cli_handler_class = $class; | |
458 | ||
459 | $ENV{'PATH'} = '/sbin:/bin:/usr/sbin:/usr/bin'; | |
460 | ||
461 | foreach my $key (keys %params) { | |
462 | next if $key eq 'prepare'; | |
463 | next if $key eq 'no_init'; # not used anymore | |
464 | next if $key eq 'no_rpcenv'; # not used anymore | |
465 | die "unknown parameter '$key'"; | |
466 | } | |
467 | ||
468 | my $preparefunc = $params{prepare}; | |
469 | ||
470 | my $pwcallback = $class->can('read_password'); | |
471 | my $stringfilemap = $class->can('string_param_file_mapping'); | |
472 | ||
473 | $exename = &$get_exe_name($class); | |
474 | ||
475 | initlog($exename); | |
476 | ||
477 | no strict 'refs'; | |
478 | $cmddef = ${"${class}::cmddef"}; | |
479 | ||
480 | if (ref($cmddef) eq 'ARRAY') { | |
481 | &$handle_simple_cmd(\@ARGV, $pwcallback, $preparefunc, $stringfilemap); | |
482 | } else { | |
483 | &$handle_cmd(\@ARGV, $pwcallback, $preparefunc, $stringfilemap); | |
484 | } | |
485 | ||
486 | exit 0; | |
487 | } | |
488 | ||
489 | 1; |