X-Git-Url: http://git.veekun.com/zzz-pokedex.git/blobdiff_plain/193856e88e36b2108c14fadd83883048ce93954c..56d77dd66179f484e0a7d3a6614a155c14f36e65:/pokedex/db/load.py diff --git a/pokedex/db/load.py b/pokedex/db/load.py index 0425dea..df0d0f1 100644 --- a/pokedex/db/load.py +++ b/pokedex/db/load.py @@ -1,8 +1,7 @@ """CSV to database or vice versa.""" import csv +import fnmatch import os.path -import pkg_resources -import re import sys from sqlalchemy.orm.attributes import instrumentation_registry @@ -11,71 +10,89 @@ import sqlalchemy.types from pokedex.db import metadata import pokedex.db.tables as tables +from pokedex.defaults import get_default_csv_dir -def _wildcard_char_to_regex(char): - """Converts a single wildcard character to the regex equivalent.""" - - if char == '?': - return '.?' - elif char == '*': - return '.*' +def _get_table_names(metadata, patterns): + """Returns a list of table names from the given metadata. If `patterns` + exists, only tables matching one of the patterns will be returned. + """ + if patterns: + table_names = set() + for pattern in patterns: + if '.' in pattern or '/' in pattern: + # If it looks like a filename, pull out just the table name + _, filename = os.path.split(pattern) + table_name, _ = os.path.splitext(filename) + pattern = table_name + + table_names.update(fnmatch.filter(metadata.tables.keys(), pattern)) else: - return re.escape(char) - -def _wildcard_glob_to_regex(glob): - """Converts a single wildcard glob to a regex STRING.""" - - # If it looks like a filename, make it not one - if '.' in glob or '/' in glob: - _, filename = os.path.split(glob) - table_name, _ = os.path.splitext(filename) - glob = table_name + table_names = metadata.tables.keys() - return u''.join(map(_wildcard_char_to_regex, glob)) + return list(table_names) -def _wildcards_to_regex(strings): - """Converts a list of wildcard globs to a single regex object.""" +def _get_verbose_prints(verbose): + """If `verbose` is true, returns three functions: one for printing a + starting message, one for printing an interim status update, and one for + printing a success or failure message when finished. - regex_parts = map(_wildcard_glob_to_regex, strings) + If `verbose` is false, returns no-op functions. + """ - regex = '^(?:' + '|'.join(regex_parts) + ')$' + if not verbose: + # Return dummies + def dummy(*args, **kwargs): + pass - return re.compile(regex) + return dummy, dummy, dummy + ### Okay, verbose == True; print stuff -def _get_verbose_prints(verbose): - """If `verbose` is true, returns two functions: one for printing a starting - message, and the other for printing a success or failure message when - finished. + def print_start(thing): + # Truncate to 66 characters, leaving 10 characters for a success + # or failure message + truncated_thing = thing[0:66] - If `verbose` is false, returns two no-op functions. - """ + # Also, space-pad to keep the cursor in a known column + num_spaces = 66 - len(truncated_thing) - if verbose: - import sys - def print_start(thing): - # Truncate to 66 characters, leaving 10 characters for a success - # or failure message - truncated_thing = thing[0:66] + print "%s...%s" % (truncated_thing, ' ' * num_spaces), + sys.stdout.flush() - # Also, space-pad to keep the cursor in a known column - num_spaces = 66 - len(truncated_thing) + if sys.stdout.isatty(): + # stdout is a terminal; stupid backspace tricks are OK. + # Don't use print, because it always adds magical spaces, which + # makes backspace accounting harder - print "%s...%s" % (truncated_thing, ' ' * num_spaces), + backspaces = [0] + def print_status(msg): + # Overwrite any status text with spaces before printing + sys.stdout.write('\b' * backspaces[0]) + sys.stdout.write(' ' * backspaces[0]) + sys.stdout.write('\b' * backspaces[0]) + sys.stdout.write(msg) sys.stdout.flush() + backspaces[0] = len(msg) def print_done(msg='ok'): - print msg + # Overwrite any status text with spaces before printing + sys.stdout.write('\b' * backspaces[0]) + sys.stdout.write(' ' * backspaces[0]) + sys.stdout.write('\b' * backspaces[0]) + sys.stdout.write(msg + "\n") sys.stdout.flush() + backspaces[0] = 0 - return print_start, print_done + else: + # stdout is a file (or something); don't bother with status at all + def print_status(msg): + pass - # Not verbose; return dummies - def dummy(*args, **kwargs): - pass + def print_done(msg='ok'): + print msg - return dummy, dummy + return print_start, print_status, print_done def load(session, tables=[], directory=None, drop_tables=False, verbose=False): @@ -101,18 +118,13 @@ def load(session, tables=[], directory=None, drop_tables=False, verbose=False): """ # First take care of verbosity - print_start, print_done = _get_verbose_prints(verbose) - + print_start, print_status, print_done = _get_verbose_prints(verbose) - if not directory: - directory = pkg_resources.resource_filename('pokedex', 'data/csv') - if tables: - regex = _wildcards_to_regex(tables) - table_names = filter(regex.match, metadata.tables.keys()) - else: - table_names = metadata.tables.keys() + if directory is None: + directory = get_default_csv_dir() + table_names = _get_table_names(metadata, tables) table_objs = [metadata.tables[name] for name in table_names] table_objs = sqlalchemy.sql.util.sort_tables(table_objs) @@ -136,12 +148,15 @@ def load(session, tables=[], directory=None, drop_tables=False, verbose=False): print_start(table_name) try: - csvfile = open("%s/%s.csv" % (directory, table_name), 'rb') + csvpath = "%s/%s.csv" % (directory, table_name) + csvfile = open(csvpath, 'rb') except IOError: # File doesn't exist; don't load anything! print_done('missing?') continue + csvsize = os.stat(csvpath).st_size + reader = csv.reader(csvfile, lineterminator='\n') column_names = [unicode(column) for column in reader.next()] @@ -164,6 +179,9 @@ def load(session, tables=[], directory=None, drop_tables=False, verbose=False): session.commit() new_rows[:] = [] + progress = "%d%%" % (100 * csvfile.tell() // csvsize) + print_status(progress) + for csvs in reader: row_data = {} @@ -254,18 +272,13 @@ def dump(session, tables=[], directory=None, verbose=False): """ # First take care of verbosity - print_start, print_done = _get_verbose_prints(verbose) + print_start, print_status, print_done = _get_verbose_prints(verbose) if not directory: - directory = pkg_resources.resource_filename('pokedex', 'data/csv') - - if tables: - regex = _wildcards_to_regex(tables) - table_names = filter(regex.match, metadata.tables.keys()) - else: - table_names = metadata.tables.keys() + directory = get_default_csv_dir() + table_names = _get_table_names(metadata, tables) table_names.sort()