| 1 |
#____________________________________________________________________
|
| 2 |
# File: Cache.pm
|
| 3 |
#____________________________________________________________________
|
| 4 |
#
|
| 5 |
# Author: Shaun Ashby <Shaun.Ashby@cern.ch>
|
| 6 |
# (with contribution from Lassi.Tuura@cern.ch)
|
| 7 |
# Update: 2003-11-27 16:45:18+0100
|
| 8 |
# Revision: $Id: Cache.pm,v 1.2 2004/12/10 13:41:39 sashby Exp $
|
| 9 |
#
|
| 10 |
# Copyright: 2003 (C) Shaun Ashby
|
| 11 |
#
|
| 12 |
#--------------------------------------------------------------------
|
| 13 |
package Cache::Cache;
|
| 14 |
require 5.004;
|
| 15 |
|
| 16 |
use Exporter;
|
| 17 |
@ISA=qw(Exporter);
|
| 18 |
#
|
| 19 |
sub new()
|
| 20 |
###############################################################
|
| 21 |
# new #
|
| 22 |
###############################################################
|
| 23 |
# modified : Thu Nov 27 16:45:27 2003 / SFA #
|
| 24 |
# params : #
|
| 25 |
# : #
|
| 26 |
# function : #
|
| 27 |
# : #
|
| 28 |
###############################################################
|
| 29 |
{
|
| 30 |
my $proto=shift;
|
| 31 |
my $class=ref($proto) || $proto;
|
| 32 |
my $self=
|
| 33 |
{
|
| 34 |
CACHENAME => "DirCache.db", # Name of global file/dir cache;
|
| 35 |
BFCACHE => {}, # BuildFile cache;
|
| 36 |
DIRCACHE => {}, # Source code cache;
|
| 37 |
STATUS => 0, # Status of cache: 1 => something changed. If so, force save;
|
| 38 |
VERBOSE => 0 # Verbose mode (0/1);
|
| 39 |
};
|
| 40 |
|
| 41 |
bless $self,$class;
|
| 42 |
return $self;
|
| 43 |
}
|
| 44 |
|
| 45 |
sub getdir()
|
| 46 |
{
|
| 47 |
my $self=shift;
|
| 48 |
my ($path) = @_;
|
| 49 |
opendir (DIR, $path) || die "$path: cannot read: $!\n";
|
| 50 |
# Skip .admin subdirectories too.
|
| 51 |
# Also skip files that look like backup files or files being modified with emacs:
|
| 52 |
my @items = map { "$path/$_" } grep (
|
| 53 |
$_ ne "." && $_ ne ".." &&
|
| 54 |
$_ ne ".admin" && $_ !~ m|\.#*|,
|
| 55 |
readdir(DIR)
|
| 56 |
);
|
| 57 |
closedir (DIR);
|
| 58 |
return @items;
|
| 59 |
}
|
| 60 |
|
| 61 |
sub prune()
|
| 62 |
{
|
| 63 |
my $self=shift;
|
| 64 |
my ($path) = @_;
|
| 65 |
$self->cachestatus(1);
|
| 66 |
return if ! exists $self->{DIRCACHE}->{$path};
|
| 67 |
my (undef, undef, @subs) = @{$self->{DIRCACHE}->{$path}};
|
| 68 |
delete $self->{DIRCACHE}->{$path};
|
| 69 |
foreach my $sub (@subs)
|
| 70 |
{
|
| 71 |
$self->prune($sub);
|
| 72 |
}
|
| 73 |
}
|
| 74 |
|
| 75 |
sub checktree()
|
| 76 |
{
|
| 77 |
my ($self, $path, $required, $dofiles) = @_;
|
| 78 |
# Check if this path needs to be checked. If it exists, has the same mode
|
| 79 |
# and the same time stamp, it's up to date and doesn't need to be checked.
|
| 80 |
# Otherwise if it is a directory whose time-stamp has changed, rescan it.
|
| 81 |
# If the path has be removed, prune it from the cache. Note that we skip
|
| 82 |
# non-directories unless $dofiles is set. Considering only directories is
|
| 83 |
# dramatically faster.
|
| 84 |
next if ($path =~ /\.admin/); # skip .admin dirs
|
| 85 |
|
| 86 |
# NB: We stat each path only once ever. The special "_" file handle uses
|
| 87 |
# the results from the last stat we've made. See man perlfunc/stat.
|
| 88 |
if (! stat($path))
|
| 89 |
{
|
| 90 |
die "$path: $!\n" if $required;
|
| 91 |
$self->logmsg("SCRAM: $path: missing: removing from cache\n");
|
| 92 |
$self->prune($path);
|
| 93 |
# Something changed so force write of cache:
|
| 94 |
$self->cachestatus(1);
|
| 95 |
return;
|
| 96 |
}
|
| 97 |
|
| 98 |
# If the entry in the cache is not the same mode or time, force an update.
|
| 99 |
# Otherwise use the cache as the list of items we need to change.
|
| 100 |
my $cached = $self->{DIRCACHE}->{$path};
|
| 101 |
my @items = ();
|
| 102 |
|
| 103 |
if (! -d _)
|
| 104 |
{
|
| 105 |
if ($dofiles)
|
| 106 |
{
|
| 107 |
$self->logmsg("SCRAM: $path: updating cache\n");
|
| 108 |
$self->{DIRCACHE}->{$path} = [ (stat(_))[2, 9] ];
|
| 109 |
}
|
| 110 |
else
|
| 111 |
{
|
| 112 |
$self->logmsg("SCRAM: $path: not a directory: removing from parent's list\n");
|
| 113 |
my $parent = $path;
|
| 114 |
$parent =~ s|(.*)/[^/]+$|$1|;
|
| 115 |
if ($parent ne $path && exists $self->{DIRCACHE}->{$parent})
|
| 116 |
{
|
| 117 |
my ($mode, $time, @subs) = @{$self->{DIRCACHE}->{$parent}};
|
| 118 |
$self->{DIRCACHE}->{$parent} = [ $mode, $time, grep ($_ ne $path, @subs) ];
|
| 119 |
}
|
| 120 |
$self->cachestatus(1);
|
| 121 |
}
|
| 122 |
}
|
| 123 |
elsif (! $cached || $cached->[0] != (stat(_))[2])
|
| 124 |
{
|
| 125 |
# When a directory is added, this block is activated
|
| 126 |
$self->added_dirs($path); # Store the newly-added dir
|
| 127 |
$self->logmsg("SCRAM: $path: new or changed: pruning and recreating cache\n");
|
| 128 |
$self->prune($path);
|
| 129 |
$self->{DIRCACHE}->{$path} = [ (stat(_))[2, 9], @items = $self->getdir($path) ];
|
| 130 |
$required = 1;
|
| 131 |
$self->cachestatus(1);
|
| 132 |
}
|
| 133 |
elsif ($cached->[1] != (stat(_))[9])
|
| 134 |
{
|
| 135 |
# When a subdirectory is removed, this block is activated
|
| 136 |
#
|
| 137 |
# This is a parent directory. We store this as any
|
| 138 |
# update can be taken recursively from this dir:
|
| 139 |
$self->modified_parentdirs($path);
|
| 140 |
|
| 141 |
$self->logmsg("SCRAM: $path: modified: updating cache\n");
|
| 142 |
# Current subdirs:
|
| 143 |
@items = $self->getdir($path);
|
| 144 |
|
| 145 |
# Start checking from element number 2:
|
| 146 |
for (my $i = 2; $i <= $#$cached; $i++)
|
| 147 |
{
|
| 148 |
if (! grep($cached->[$i] eq $_, @items))
|
| 149 |
{
|
| 150 |
# Add the removed path to a store for later access
|
| 151 |
# from the project cache. This info is needed to update
|
| 152 |
# the cached data:
|
| 153 |
$self->schedremoval($cached->[$i]);
|
| 154 |
# Remove all child data:
|
| 155 |
$self->clean_cache_recursive($cached->[$i]);
|
| 156 |
}
|
| 157 |
}
|
| 158 |
|
| 159 |
$self->{DIRCACHE}->{$path} = [ (stat(_))[2, 9], @items ];
|
| 160 |
$required = 1;
|
| 161 |
$self->cachestatus(1);
|
| 162 |
}
|
| 163 |
else
|
| 164 |
{
|
| 165 |
$self->logmsg("SCRAM: $path: valid: using cached directory list\n");
|
| 166 |
(undef, undef, @items) = @{$self->{DIRCACHE}->{$path}};
|
| 167 |
$required = 0;
|
| 168 |
}
|
| 169 |
|
| 170 |
# Process sub-directories
|
| 171 |
foreach my $item (@items)
|
| 172 |
{
|
| 173 |
$self->checktree($item, $required, $dofiles);
|
| 174 |
}
|
| 175 |
}
|
| 176 |
|
| 177 |
sub clean_cache_recursive()
|
| 178 |
{
|
| 179 |
my $self=shift;
|
| 180 |
my ($startdir) = @_;
|
| 181 |
my $children = $self->{DIRCACHE}->{$startdir};
|
| 182 |
|
| 183 |
for (my $i = 2; $i <= $#$children; $i++)
|
| 184 |
{
|
| 185 |
# Remove all children:
|
| 186 |
$self->schedremoval($children->[$i]);
|
| 187 |
$self->clean_cache_recursive($children->[$i]);
|
| 188 |
}
|
| 189 |
|
| 190 |
delete $self->{DIRCACHE}->{$startdir};
|
| 191 |
return $self;
|
| 192 |
}
|
| 193 |
|
| 194 |
sub dirtree()
|
| 195 |
{
|
| 196 |
my $self=shift;
|
| 197 |
my ($dir,$dofiles) = @_;
|
| 198 |
|
| 199 |
# Get the directory tree:
|
| 200 |
$self->checktree($dir, 1, $dofiles);
|
| 201 |
return $self;
|
| 202 |
}
|
| 203 |
|
| 204 |
sub checkfiles()
|
| 205 |
{
|
| 206 |
my $self=shift;
|
| 207 |
# Scan config dir for top-level data, then start from src:
|
| 208 |
my @scandirs=($ENV{LOCALTOP}."/".$ENV{SCRAM_CONFIGDIR}, $ENV{SCRAM_SOURCEDIR});
|
| 209 |
my $dofiles=1;
|
| 210 |
# Loop over all directories that need scanning (normally just src and config):
|
| 211 |
foreach my $scand (@scandirs)
|
| 212 |
{
|
| 213 |
$self->logmsg("SCRAM: Scanning $scand [dofiles set to ".$dofiles."]\n");
|
| 214 |
# Check the directory tree:
|
| 215 |
$self->dirtree($scand, $dofiles);
|
| 216 |
$dofiles=0;
|
| 217 |
}
|
| 218 |
|
| 219 |
# Mark everything in the cache old:
|
| 220 |
map { $_->[0] = 0 } values %{$self->{BFCACHE}};
|
| 221 |
map { $_->[0] = 0 } values %{$self->{CONFIGCACHE}};
|
| 222 |
|
| 223 |
# Remember which directories have buildfiles in them:
|
| 224 |
my %files = map { -f $_ ? ($_ => [ (stat(_))[9] ]) : () }
|
| 225 |
map { "$_/BuildFile" }
|
| 226 |
keys %{$self->{DIRCACHE}};
|
| 227 |
|
| 228 |
# Get list of files in config dir:
|
| 229 |
my $configcache = {};
|
| 230 |
my %configfiles = map { -f $_ &&
|
| 231 |
$_ =~ m|$ENV{LOCALTOP}/$ENV{SCRAM_CONFIGDIR}.*?$|
|
| 232 |
? ($_ => [ (stat(_))[9] ]) : () } keys %{$self->{DIRCACHE}};
|
| 233 |
|
| 234 |
# Also add ToolCache.db to the cache: FIXME: should probably use aglob here so
|
| 235 |
# that all SCRAM_ARCHs are taken into account.
|
| 236 |
$configfiles{$ENV{LOCALTOP}."/.SCRAM/".$ENV{SCRAM_ARCH}."/ToolCache.db"} =
|
| 237 |
[ (stat($ENV{LOCALTOP}."/.SCRAM/".$ENV{SCRAM_ARCH}."/ToolCache.db"))[9] ];
|
| 238 |
|
| 239 |
# Compare or add to config file cache. We need this to be separate so we can tell if a
|
| 240 |
# file affecting our build has been changed:
|
| 241 |
while (my ($path, $vals) = each %configfiles)
|
| 242 |
{
|
| 243 |
if ($self->{CONFIGCACHE}->{$path} && $self->{CONFIGCACHE}->{$path}[1] == $vals->[0])
|
| 244 |
{
|
| 245 |
$configcache->{$path} = $self->{CONFIGCACHE}->{$path};
|
| 246 |
delete $self->{CONFIGCACHE}->{$path};
|
| 247 |
}
|
| 248 |
else
|
| 249 |
{
|
| 250 |
$self->{STATUSCONFIG}=1;
|
| 251 |
$self->logmsg("SCRAM: $path: changed\n");
|
| 252 |
$configcache->{$path} = [ 1, @$vals ];
|
| 253 |
delete $self->{CONFIGCACHE}->{$path};
|
| 254 |
}
|
| 255 |
}
|
| 256 |
|
| 257 |
# Compare with existing cache: remove from cache what no longer
|
| 258 |
# exists, then check which build files are newer than the cache.
|
| 259 |
my $newcache = {};
|
| 260 |
|
| 261 |
while (my ($path, $vals) = each %files)
|
| 262 |
{
|
| 263 |
if ($self->{BFCACHE}->{$path} && $self->{BFCACHE}->{$path}[1] == $vals->[0])
|
| 264 |
{
|
| 265 |
$newcache->{$path} = $self->{BFCACHE}->{$path};
|
| 266 |
delete $self->{BFCACHE}->{$path};
|
| 267 |
}
|
| 268 |
else
|
| 269 |
{
|
| 270 |
$self->{STATUSSRC}=1;
|
| 271 |
$self->logmsg("SCRAM: $path: changed\n");
|
| 272 |
$newcache->{$path} = [ 1, @$vals ];
|
| 273 |
delete $self->{BFCACHE}->{$path};
|
| 274 |
}
|
| 275 |
}
|
| 276 |
|
| 277 |
# If there were BuildFiles that were removed, force update of cache
|
| 278 |
# and remove the BUILDFILEDATA entries:
|
| 279 |
foreach my $path (keys %{$self->{BFCACHE}})
|
| 280 |
{
|
| 281 |
$self->logmsg("SCRAM: $path: removed. Build data will be removed from build cache.\n");
|
| 282 |
$self->cachestatus(1);
|
| 283 |
# Store this so that later, we can tell the BuildDataStore to remove it:
|
| 284 |
$self->schedremoval($path);
|
| 285 |
}
|
| 286 |
|
| 287 |
# Save the BuildFile cache:
|
| 288 |
delete $self->{BFCACHE};
|
| 289 |
$self->{BFCACHE} = $newcache;
|
| 290 |
|
| 291 |
# Save the config cache:
|
| 292 |
delete $self->{CONFIGCACHE};
|
| 293 |
$self->{CONFIGCACHE} = $configcache;
|
| 294 |
return $self;
|
| 295 |
}
|
| 296 |
|
| 297 |
sub dircache()
|
| 298 |
{
|
| 299 |
my $self=shift;
|
| 300 |
# Return the file cache:
|
| 301 |
return $self->{DIRCACHE};
|
| 302 |
}
|
| 303 |
|
| 304 |
sub added_dirs()
|
| 305 |
{
|
| 306 |
my $self=shift;
|
| 307 |
my ($path) = @_;
|
| 308 |
|
| 309 |
# If we have a path to add, add it.
|
| 310 |
if ($path)
|
| 311 |
{
|
| 312 |
if (exists($self->{ADDEDDIRS}))
|
| 313 |
{
|
| 314 |
push(@{$self->{ADDEDDIRS}}, $path);
|
| 315 |
}
|
| 316 |
else
|
| 317 |
{
|
| 318 |
$self->{ADDEDDIRS} = [ $path ];
|
| 319 |
}
|
| 320 |
}
|
| 321 |
else
|
| 322 |
{
|
| 323 |
# Otherwise, return the array of added dirs:
|
| 324 |
my @addeddirs = @{$self->{ADDEDDIRS}};
|
| 325 |
delete $self->{ADDEDDIRS};
|
| 326 |
return \@addeddirs;
|
| 327 |
}
|
| 328 |
}
|
| 329 |
|
| 330 |
sub modified_parentdirs()
|
| 331 |
{
|
| 332 |
my $self=shift;
|
| 333 |
my ($path) = @_;
|
| 334 |
|
| 335 |
# If we have a path to add, add it.
|
| 336 |
# Don't bother if it's the main source dir as we don't
|
| 337 |
# want to rescan everything from src (that would be silly):
|
| 338 |
if ($path && $path ne $ENV{SCRAM_SOURCEDIR})
|
| 339 |
{
|
| 340 |
if (exists($self->{MODPARENTDIRS}))
|
| 341 |
{
|
| 342 |
push(@{$self->{MODPARENTDIRS}}, $path);
|
| 343 |
}
|
| 344 |
else
|
| 345 |
{
|
| 346 |
$self->{MODPARENTDIRS} = [ $path ];
|
| 347 |
}
|
| 348 |
}
|
| 349 |
else
|
| 350 |
{
|
| 351 |
# Otherwise, return the array of added dirs:
|
| 352 |
my @moddeddirs = @{$self->{MODPARENTDIRS}};
|
| 353 |
delete $self->{MODPARENTDIRS};
|
| 354 |
return \@moddeddirs;
|
| 355 |
}
|
| 356 |
}
|
| 357 |
|
| 358 |
sub schedremoval()
|
| 359 |
{
|
| 360 |
my $self=shift;
|
| 361 |
my ($d)=@_;
|
| 362 |
|
| 363 |
if ($d)
|
| 364 |
{
|
| 365 |
if (exists($self->{REMOVEDATA}))
|
| 366 |
{
|
| 367 |
push(@{$self->{REMOVEDATA}},$d);
|
| 368 |
}
|
| 369 |
else
|
| 370 |
{
|
| 371 |
$self->{REMOVEDATA} = [ $d ];
|
| 372 |
}
|
| 373 |
}
|
| 374 |
else
|
| 375 |
{
|
| 376 |
my $remove = [ @{$self->{REMOVEDATA}} ];
|
| 377 |
$self->{REMOVEDATA} = [];
|
| 378 |
return $remove;
|
| 379 |
}
|
| 380 |
}
|
| 381 |
|
| 382 |
sub filestatus()
|
| 383 |
{
|
| 384 |
my $self=shift;
|
| 385 |
# Here we want to return a true or false value depending on whether
|
| 386 |
# or not a buildfile was changed:
|
| 387 |
return $self->{STATUSSRC};
|
| 388 |
}
|
| 389 |
|
| 390 |
sub configstatus()
|
| 391 |
{
|
| 392 |
my $self=shift;
|
| 393 |
# Here we want to return a true or false value depending on whether or not a file
|
| 394 |
# in config dir was changed:
|
| 395 |
return $self->{STATUSCONFIG};
|
| 396 |
}
|
| 397 |
|
| 398 |
sub bf_for_scanning()
|
| 399 |
{
|
| 400 |
my $self=shift;
|
| 401 |
my $MODIFIED = [];
|
| 402 |
|
| 403 |
$self->{STATUSSRC} = 0;
|
| 404 |
|
| 405 |
# Return a list of buildfiles to be reread. Note that we only do this
|
| 406 |
# if the status was changed (i.e. don't have to read through the list of BFs to know
|
| 407 |
# whether something changed as the flags STATUSSRC is set as the src tree is checked).
|
| 408 |
# Also we check to see if STATUSCONFIG is true. If so all BuildFiles are marked to be read:
|
| 409 |
if ($self->{STATUSCONFIG})
|
| 410 |
{
|
| 411 |
$self->{STATUSCONFIG} = 0;
|
| 412 |
# Return all the buildfiles since they'll all to be read:
|
| 413 |
return [ keys %{$self->{BFCACHE}} ];
|
| 414 |
}
|
| 415 |
else
|
| 416 |
{
|
| 417 |
# Only return the files that changed:
|
| 418 |
map { ( $self->{BFCACHE}{$_}->[0] == 1 ) && push(@$MODIFIED, $_) } keys %{$self->{BFCACHE}};
|
| 419 |
# Reset the flag:
|
| 420 |
$self->{STATUSCONFIG} = 0;
|
| 421 |
}
|
| 422 |
return $MODIFIED;
|
| 423 |
}
|
| 424 |
|
| 425 |
sub paths()
|
| 426 |
{
|
| 427 |
my $self=shift;
|
| 428 |
my $paths = {};
|
| 429 |
|
| 430 |
$self->{ALLDIRS} = [];
|
| 431 |
|
| 432 |
# Pass over each dir, skipping those that are not wanted and
|
| 433 |
# storing those that are relevant to an array:
|
| 434 |
foreach my $path (keys %{$self->{DIRCACHE}})
|
| 435 |
{
|
| 436 |
if ( ! -d $path && $path != m|$ENV{LOCALTOP}/$ENV{SCRAM_CONFIGDIR}.*?$|)
|
| 437 |
{
|
| 438 |
$self->logmsg("SCRAM: $path no longer exists. Clearing from cache.\n");
|
| 439 |
$self->cachestatus(1);
|
| 440 |
delete $self->{DIRCACHE}->{$path};
|
| 441 |
}
|
| 442 |
else
|
| 443 |
{
|
| 444 |
next if $path =~ m|/CVS$|; # Ignore CVS directories.
|
| 445 |
next if $path =~ m|/\.admin$|; # Ignore .admin directories.
|
| 446 |
next if $path =~ m|\Q$ENV{LOCALTOP}/$ENV{SCRAM_CONFIGDIR}\L|;
|
| 447 |
push(@{$self->{ALLDIRS}},$path);
|
| 448 |
}
|
| 449 |
}
|
| 450 |
|
| 451 |
# Return the array:
|
| 452 |
return $self->{ALLDIRS};
|
| 453 |
}
|
| 454 |
|
| 455 |
sub verbose()
|
| 456 |
{
|
| 457 |
my $self=shift;
|
| 458 |
# Turn on verbose mode:
|
| 459 |
@_ ? $self->{VERBOSE} = shift
|
| 460 |
: $self->{VERBOSE}
|
| 461 |
}
|
| 462 |
|
| 463 |
sub cachestatus()
|
| 464 |
{
|
| 465 |
my $self=shift;
|
| 466 |
# Set/return the status of the cache:
|
| 467 |
@_ ? $self->{STATUS} = shift
|
| 468 |
: $self->{STATUS}
|
| 469 |
}
|
| 470 |
|
| 471 |
sub logmsg()
|
| 472 |
{
|
| 473 |
my $self=shift;
|
| 474 |
# Print a message to STDOUT if VERBOSE is true:
|
| 475 |
print STDERR @_ if $self->verbose();
|
| 476 |
}
|
| 477 |
|
| 478 |
sub name()
|
| 479 |
{
|
| 480 |
my $self=shift;
|
| 481 |
# Set/return the name of the cache to use:
|
| 482 |
@_ ? $self->{CACHENAME} = shift
|
| 483 |
: $self->{CACHENAME}
|
| 484 |
}
|
| 485 |
|
| 486 |
1;
|
