Class: DTAS::Mlib
Overview
For the DTAS Music Library, based on what MPD uses.
Defined Under Namespace
Classes: Job
Constant Summary
collapse
- DM_DIR =
-1
- DM_IGN =
-2
- TAGS =
same capitalization as in mpd
Hash[*(
%w(Artist ArtistSort
Album AlbumSort
AlbumArtist AlbumArtistSort
Title Track Name
Genre Date Composer Performer Comment Disc
MUSICBRAINZ_ARTISTID MUSICBRAINZ_ALBUMID
MUSICBRAINZ_ALBUMARTISTID
MUSICBRAINZ_TRACKID
MUSICBRAINZ_RELEASETRACKID).map! { |x| [ x.downcase, x ]
Constants included
from Process
Process::PIDS
Instance Attribute Summary collapse
Instance Method Summary
collapse
-
#cd(path) ⇒ Object
-
#count_distinct(tag) ⇒ Object
-
#count_songs ⇒ Object
-
#db_playtime ⇒ Object
-
#dir_vivify(parts, ctime) ⇒ Object
-
#dump(path, cache, cb) ⇒ Object
returns an array on error.
-
#emit_1(node, parent, cb) ⇒ Object
-
#emit_recurse(node, cache, cb) ⇒ Object
-
#find(type, what, offset = 0, limit = nil) ⇒ Object
based on the MPD command of the same name, unstable API.
-
#find_dump_part(cur, base) ⇒ Object
-
#ignore(job) ⇒ Object
-
#init_suffixes ⇒ Object
-
#initialize(db) ⇒ Mlib
constructor
-
#load_tags ⇒ Object
-
#migrate ⇒ Object
-
#node_ensure(parent_id, name, tlen, ctime = nil) ⇒ Object
-
#node_lookup(parent_id, name) ⇒ Object
-
#node_update_maybe(node, tlen, ctime) ⇒ Object
-
#offset_limit(q, offset, limit) ⇒ Object
-
#path_of(node, cache) ⇒ Object
-
#remove_entry(node) ⇒ Object
-
#root_node ⇒ Object
-
#scan_any(path, parent_id) ⇒ Object
-
#scan_dir(path, st, parent_id = nil) ⇒ Object
-
#scan_file(path, st, parent_id) ⇒ Object
-
#search(type, what, offset = 0, limit = nil) ⇒ Object
based on the MPD command of the same name.
-
#send_harder(sock, msg) ⇒ Object
-
#stats ⇒ Object
-
#synchronize ⇒ Object
-
#update(path, opts = nil) ⇒ Object
-
#worker(todo, lock) ⇒ Object
-
#worker_work(job) ⇒ Object
Methods included from Process
#dtas_spawn, #env_expand, #env_expand_ary, #env_expand_i, #qx, reaper
Methods included from SpawnFix
#spawn
Methods included from XS
#xs
Constructor Details
#initialize(db) ⇒ Mlib
Returns a new instance of Mlib.
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# File 'lib/dtas/mlib.rb', line 39
def initialize(db)
if String === db
require 'sequel'
opts = { single_threaded: true }
db = "sqlite://#{db}" unless db.include?('://')
opts[:transaction_mode] = :immediate
opts[:synchronous] = :off
opts[:case_sensitive_like] = false db = Sequel.connect(db, opts)
end
@db = db
@pwd = nil
@follow_outside_symlinks = true
@follow_inside_symlinks = true
@root_node = nil
@tags = TAGS.dup
@tag_map = nil
@suffixes = nil
@work = nil
@sources = [ (sox = DTAS::Source::Sox.new),
DTAS::Source::Av.new,
DTAS::Source::Ff.new,
DTAS::Source::SplitFX.new(sox),
]
end
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Instance Attribute Details
#follow_inside_symlinks ⇒ Object
Returns the value of attribute follow_inside_symlinks.
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# File 'lib/dtas/mlib.rb', line 18
def follow_inside_symlinks
@follow_inside_symlinks
end
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#follow_outside_symlinks ⇒ Object
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# File 'lib/dtas/mlib.rb', line 17
def follow_outside_symlinks
@follow_outside_symlinks
end
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Returns the value of attribute tags.
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# File 'lib/dtas/mlib.rb', line 19
def tags
@tags
end
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Instance Method Details
#cd(path) ⇒ Object
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# File 'lib/dtas/mlib.rb', line 294
def cd(path)
prev_wd = @pwd
Dir.chdir(path)
cur = @pwd = Dir.pwd.b
yield
ensure
Dir.chdir(prev_wd) if cur && prev_wd
@pwd = prev_wd
end
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#count_distinct(tag) ⇒ Object
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# File 'lib/dtas/mlib.rb', line 388
def count_distinct(tag)
s = 'SELECT COUNT(DISTINCT(val_id)) FROM comments WHERE tag_id = ?'
@db.fetch(s, @tag_map[tag]).single_value
end
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#count_songs ⇒ Object
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# File 'lib/dtas/mlib.rb', line 393
def count_songs
@db.fetch('SELECT COUNT(*) FROM nodes WHERE tlen >= 0').single_value
end
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#db_playtime ⇒ Object
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# File 'lib/dtas/mlib.rb', line 397
def db_playtime
@db.fetch('SELECT SUM(tlen) FROM nodes WHERE tlen >= 0').single_value
end
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#dir_vivify(parts, ctime) ⇒ Object
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# File 'lib/dtas/mlib.rb', line 255
def dir_vivify(parts, ctime)
synchronize do
dir = root_node
last = parts.pop
parts.each do |name|
dir = node_ensure(dir[:id], name, DM_DIR)
end
node_ensure(dir[:id], last, DM_DIR, ctime)
end
end
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#dump(path, cache, cb) ⇒ Object
returns an array on error
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# File 'lib/dtas/mlib.rb', line 362
def dump(path, cache, cb)
dir = path
base = nil
retried = false
begin
found = cd(dir) { find_dump_part(root_node, base) }
rescue Errno::ENOTDIR
raise if retried || found
dir, base = File.split(path)
retried = true
retry
end
return found if Array === found
load_tags
if found[:tlen] == DM_DIR
emit_recurse(found, cache, cb)
else
parent = @db[:nodes][id: found[:parent_id]]
parent or abort "missing parent for #{found.inspect}"
parent[:dirname] ||= path_of(parent, cache)
emit_1(found, parent, cache, cb)
end
end
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#emit_1(node, parent, cb) ⇒ Object
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# File 'lib/dtas/mlib.rb', line 438
def emit_1(node, parent, cb)
= Hash.new { |h,k| h[k] = [] }
@db['SELECT c.tag_id, v.val FROM comments c ' \
'LEFT JOIN vals v ON v.id = c.val_id ' \
"WHERE c.node_id = #{node[:id]} ORDER BY c.tag_id"].each do |c|
[@tag_rmap[c[:tag_id]]] << c[:val]
end
cb.call(parent, node, )
end
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#emit_recurse(node, cache, cb) ⇒ Object
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# File 'lib/dtas/mlib.rb', line 425
def emit_recurse(node, cache, cb)
node[:dirname] ||= path_of(node, cache)
@db[:nodes].where(parent_id: node[:id]).order(:name).each do |nd|
next if nd[:id] == node[:id] case nd[:tlen]
when DM_DIR then emit_recurse(nd, cache, cb)
when DM_IGN then next
else
emit_1(nd, node, cb)
end
end
end
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#find(type, what, offset = 0, limit = nil) ⇒ Object
based on the MPD command of the same name, unstable API
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# File 'lib/dtas/mlib.rb', line 486
def find(type, what, offset = 0, limit = nil)
load_tags
type = type.downcase
q = []
case type
when 'any'
q << 'SELECT DISTINCT(n.id),n.* FROM nodes n ' \
'LEFT JOIN comments c ON c.node_id = n.id ' \
'LEFT JOIN vals v ON v.id = c.val_id ' \
'WHERE v.val = ?'
when *(@tags.keys)
tag_id = @tag_map[type]
q << 'SELECT DISTINCT(n.id),n.* FROM nodes n ' \
'LEFT JOIN comments c ON c.node_id = n.id ' \
'LEFT JOIN vals v ON v.id = c.val_id ' \
'LEFT JOIN tags t ON t.id = c.tag_id ' \
"WHERE v.val = ? AND t.id = #{tag_id}"
else
raise ArgumentError, "invalid type=#{type.inspect}"
end
q << 'ORDER by n.parent_id,n.name'
offset_limit(q, offset, limit)
@db[q.join(' '), what].each { |node| yield node }
end
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#find_dump_part(cur, base) ⇒ Object
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# File 'lib/dtas/mlib.rb', line 341
def find_dump_part(cur, base)
parts = @pwd.split(%r{/+}n)
parts.shift parts << base if base
parts.each do |name|
if cur = node_lookup(cur[:id], name)
case cur[:tlen]
when DM_DIR then next when DM_IGN then return [ :ignored, cur ]
else return cur if name.object_id == parts[-1].object_id
return [ :notdir, cur ]
end
else
return [ :missing, name ]
end
end
cur
end
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#ignore(job) ⇒ Object
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# File 'lib/dtas/mlib.rb', line 95
def ignore(job)
synchronize do
node_ensure(job.parent_id, job.path, DM_IGN, job.ctime)
end
end
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#init_suffixes ⇒ Object
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# File 'lib/dtas/mlib.rb', line 73
def init_suffixes
`sox --help 2>/dev/null` =~ /\nAUDIO FILE FORMATS:\s*([^\n]+)/
re = $1.split(/\s+/).map! { |x| Regexp.quote(x) }.join('|')
@suffixes = Regexp.new("\\.(?:#{re}|yml)\\z", Regexp::IGNORECASE)
end
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# File 'lib/dtas/mlib.rb', line 183
def load_tags
return @tag_map if @tag_map
tag_map = {}
tags = @db[:tags]
@tags.each do |lc, mc|
unless q = tags[tag: mc]
q = { tag: mc }
q[:id] = tags.insert(q)
end
tag_map[lc] = q[:id]
end
%w(track disc).each do |x|
tag_id = tag_map[x] and tag_map["#{x}number"] = tag_id
end
@tag_rmap = tag_map.invert.freeze
tag_map.merge!(Hash[*(tag_map.map { |k,v|
[DTAS.dedupe_str(k.upcase), v]
}.flatten!)])
@tag_map = tag_map.freeze
end
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#migrate ⇒ Object
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# File 'lib/dtas/mlib.rb', line 173
def migrate
require 'sequel'
Sequel.extension(:migration, :core_extensions) @db.transaction do
Sequel::Migrator.apply(@db, "#{File.dirname(__FILE__)}/mlib/migrations")
root_node load_tags
end
end
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#node_ensure(parent_id, name, tlen, ctime = nil) ⇒ Object
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# File 'lib/dtas/mlib.rb', line 280
def node_ensure(parent_id, name, tlen, ctime = nil)
q = { name: name, parent_id: parent_id }
if node = @db[:nodes][q]
node_update_maybe(node, tlen, ctime)
else
node = q.dup
node[:tlen] = tlen
node[:ctime] = ctime
node[:id] = @db[:nodes].insert(node)
end
node
end
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#node_lookup(parent_id, name) ⇒ Object
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# File 'lib/dtas/mlib.rb', line 276
def node_lookup(parent_id, name)
@db[:nodes][name: name, parent_id: parent_id]
end
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#node_update_maybe(node, tlen, ctime) ⇒ Object
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# File 'lib/dtas/mlib.rb', line 266
def node_update_maybe(node, tlen, ctime)
q = {}
q[:ctime] = ctime if ctime && ctime != node[:ctime]
q[:tlen] = tlen if tlen != node[:tlen]
return if q.empty?
node_id = node.delete(:id)
@db[:nodes].where(id: node_id).update(node.merge(q))
node[:id] = node_id
end
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#offset_limit(q, offset, limit) ⇒ Object
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# File 'lib/dtas/mlib.rb', line 475
def offset_limit(q, offset, limit)
offset = offset.to_s
limit = limit.to_s
if limit =~ %r{\A\d+\z}
q << "LIMIT #{limit}"
q << "OFFSET #{offset}" if offset =~ %r{\A\d+\z} && offset != '0'
end
q
end
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#path_of(node, cache) ⇒ Object
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# File 'lib/dtas/mlib.rb', line 407
def path_of(node, cache)
base = node[:name]
return '/' if base == '' parent_id = node[:parent_id]
base += '/' unless node[:tlen] >= 0
ppath = cache[parent_id] and return DTAS.dedupe_str("#{ppath}/#{base}")
parts = []
begin
node = @db[:nodes][id: node[:parent_id]]
break if node[:id] == node[:parent_id]
parts.unshift node[:name]
end while true
parts.unshift('')
cache[parent_id] = DTAS.dedupe_str(parts.join('/'))
parts << base
DTAS.dedupe_str(parts.join('/'))
end
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#remove_entry(node) ⇒ Object
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# File 'lib/dtas/mlib.rb', line 448
def remove_entry(node)
root_id = root_node[:id]
node_id = node[:id]
q = { parent_id: node_id }
nodes = @db[:nodes]
= @db[:comments]
nodes.where(q).each do |nd|
nd_id = nd[:id]
next if nd_id == root_id
case nd[:tlen]
when DM_DIR, DM_IGN
remove_entry(nd)
else
.where(node_id: nd_id).delete
end
end
nodes.where(q).delete
.where(node_id: node_id).delete
nodes.where(id: node_id).delete
end
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#root_node ⇒ Object
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# File 'lib/dtas/mlib.rb', line 231
def root_node
q = @root_node and return q
q = {
parent_id: 1, name: '',
}
node = @db[:nodes][q]
if node
node[:dirname] = ''
@root_node = node
return node
end
begin
q[:tlen] = DM_DIR
q[:id] = @db[:nodes].insert(q)
q
rescue Sequel::DatabaseError
raise if @db.in_transaction?
@root_node = @db[:paths][q] or raise
end
end
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#scan_any(path, parent_id) ⇒ Object
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# File 'lib/dtas/mlib.rb', line 206
def scan_any(path, parent_id)
st = File.lstat(path) rescue return
if st.directory?
scan_dir(path, st, parent_id)
elsif st.file?
scan_file(path, st, parent_id)
end
end
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#scan_dir(path, st, parent_id = nil) ⇒ Object
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# File 'lib/dtas/mlib.rb', line 304
def scan_dir(path, st, parent_id = nil)
cd(path) do
dir = dir_vivify(@pwd.split(%r{/+}n), st.ctime.to_i)
dir_id = dir[:id]
synchronize do
@db[:nodes].where(parent_id: dir_id).each do |node|
File.exist?(node[:name]) or remove_entry(node)
end
end
Dir.foreach('.', encoding: Encoding::BINARY) do |x|
case x
when '.', '..', %r{\n}n
next
else
scan_any(x, dir_id)
end
end
end
end
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#scan_file(path, st, parent_id) ⇒ Object
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# File 'lib/dtas/mlib.rb', line 217
def scan_file(path, st, parent_id)
return if @suffixes !~ path || st.size == 0
unless @force
if node = @db[:nodes][name: path, parent_id: parent_id]
return if st.ctime.to_i == node[:ctime] || node[:tlen] == DM_IGN
end
end
job = Job.new(@pwd, st.ctime.to_i, parent_id, path)
send_harder(@work, Marshal.dump(job))
end
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#search(type, what, offset = 0, limit = nil) ⇒ Object
based on the MPD command of the same name
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# File 'lib/dtas/mlib.rb', line 513
def search(type, what, offset = 0, limit = nil)
load_tags
type = type.downcase
q = []
what = @db.literal(%Q(%#{what}%))
case type
when 'any'
q << 'SELECT DISTINCT(n.id),n.* FROM nodes n ' \
'LEFT JOIN comments c ON c.node_id = n.id ' \
'LEFT JOIN vals v ON v.id = c.val_id ' \
"WHERE v.val LIKE #{what}"
when *(@tags.keys)
tag_id = @tag_map[type]
q << 'SELECT DISTINCT(n.id),n.* FROM nodes n ' \
'LEFT JOIN comments c ON c.node_id = n.id ' \
'LEFT JOIN vals v ON v.id = c.val_id ' \
'LEFT JOIN tags t ON t.id = c.tag_id ' \
"WHERE t.id = #{tag_id} AND v.val LIKE #{what}"
else
raise ArgumentError, "invalid type=#{type.inspect}"
end
q << 'ORDER by n.parent_id,n.name'
offset_limit(q, offset, limit)
@db[q.join(' ')].each { |node| yield node }
end
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#send_harder(sock, msg) ⇒ Object
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# File 'lib/dtas/mlib.rb', line 329
def send_harder(sock, msg)
sock.sendmsg(msg)
rescue Errno::EMSGSIZE
sock.setsockopt(:SOL_SOCKET, :SO_SNDBUF, msg.bytesize + 1024)
begin
sock.sendmsg(msg)
rescue => e
warn "#{msg.bytesize} too big, dropped #{e.class}"
end
end
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#stats ⇒ Object
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# File 'lib/dtas/mlib.rb', line 401
def stats
rv = { songs: count_songs, db_playtime: db_playtime }
%w(artist album).each { |k| rv[:"#{k}s"] = count_distinct(k) }
rv
end
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#synchronize ⇒ Object
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# File 'lib/dtas/mlib.rb', line 66
def synchronize
@lock.flock(File::LOCK_EX)
@db.transaction { yield }
ensure
@lock.flock(File::LOCK_UN)
end
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#update(path, opts = nil) ⇒ Object
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# File 'lib/dtas/mlib.rb', line 139
def update(path, opts = nil)
opts ||= {}
jobs = opts[:jobs] || 8
@force = opts[:force] || false
init_suffixes
st = File.stat(path) st.directory? or
raise ArgumentError, "path: #{path.inspect} is not a directory"
@work and raise 'update already running'
todo, @work = UNIXSocket.pair(:SOCK_SEQPACKET)
@db.disconnect
@lock = Tempfile.new('dtas.mlib.lock')
jobs.times do |i|
lock = File.open(@lock.path, 'w')
fork { worker(todo, lock) }
lock.close
end
@lock.unlink
todo.close
scan_dir(path, st)
@work.close
Process.waitall
@lock.close
ensure
@work = nil
end
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#worker(todo, lock) ⇒ Object
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# File 'lib/dtas/mlib.rb', line 79
def worker(todo, lock)
@lock = lock
@work.close
synchronize { @db.tables } @pwd = Dir.pwd.b
begin
buf = todo.recv(16384) exit if buf.empty?
job = Marshal.load(buf)
buf.clear
worker_work(job)
rescue => e
warn "#{e.message} (#{e.class}) #{e.backtrace.join("\n")}\n"
end while true
end
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#worker_work(job) ⇒ Object
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# File 'lib/dtas/mlib.rb', line 101
def worker_work(job)
tlen = nil
wd = job.wd
if wd != @pwd
Dir.chdir(wd)
@pwd = wd
end
path = job.path
found = nil
@sources.each do |src|
found = src.try(path) and break
end
return ignore(job) unless found
tlen = found.duration
return ignore(job) if tlen.nil? || tlen < 0
tlen = tlen.round
tmp = {}
if = found.
.each do |tag, value|
tag_id = @tag_map[tag] or next
tmp[tag_id] = value if value.valid_encoding?
end
end
synchronize do
node_id = node_ensure(job.parent_id, path, tlen, job.ctime)[:id]
vals = @db[:vals]
= @db[:comments]
q = { node_id: node_id }
.where(q).delete
tmp.each do |tid, val|
v = vals[val: val]
q[:val_id] = v ? v[:id] : vals.insert(val: val)
q[:tag_id] = tid
.insert(q)
end
end
end
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