diff options
Diffstat (limited to 'mycli/packages/special')
| -rw-r--r-- | mycli/packages/special/__init__.py | 10 | ||||
| -rw-r--r-- | mycli/packages/special/dbcommands.py | 157 | ||||
| -rw-r--r-- | mycli/packages/special/delimitercommand.py | 80 | ||||
| -rw-r--r-- | mycli/packages/special/favoritequeries.py | 63 | ||||
| -rw-r--r-- | mycli/packages/special/iocommands.py | 453 | ||||
| -rw-r--r-- | mycli/packages/special/main.py | 118 | ||||
| -rw-r--r-- | mycli/packages/special/utils.py | 46 |
7 files changed, 927 insertions, 0 deletions
diff --git a/mycli/packages/special/__init__.py b/mycli/packages/special/__init__.py new file mode 100644 index 0000000..92bcca6 --- /dev/null +++ b/mycli/packages/special/__init__.py @@ -0,0 +1,10 @@ +__all__ = [] + +def export(defn): + """Decorator to explicitly mark functions that are exposed in a lib.""" + globals()[defn.__name__] = defn + __all__.append(defn.__name__) + return defn + +from . import dbcommands +from . import iocommands diff --git a/mycli/packages/special/dbcommands.py b/mycli/packages/special/dbcommands.py new file mode 100644 index 0000000..ed90e4c --- /dev/null +++ b/mycli/packages/special/dbcommands.py @@ -0,0 +1,157 @@ +import logging +import os +import platform +from mycli import __version__ +from mycli.packages.special import iocommands +from mycli.packages.special.utils import format_uptime +from .main import special_command, RAW_QUERY, PARSED_QUERY +from pymysql import ProgrammingError + +log = logging.getLogger(__name__) + + +@special_command('\\dt', '\\dt[+] [table]', 'List or describe tables.', + arg_type=PARSED_QUERY, case_sensitive=True) +def list_tables(cur, arg=None, arg_type=PARSED_QUERY, verbose=False): + if arg: + query = 'SHOW FIELDS FROM {0}'.format(arg) + else: + query = 'SHOW TABLES' + log.debug(query) + cur.execute(query) + tables = cur.fetchall() + status = '' + if cur.description: + headers = [x[0] for x in cur.description] + else: + return [(None, None, None, '')] + + if verbose and arg: + query = 'SHOW CREATE TABLE {0}'.format(arg) + log.debug(query) + cur.execute(query) + status = cur.fetchone()[1] + + return [(None, tables, headers, status)] + +@special_command('\\l', '\\l', 'List databases.', arg_type=RAW_QUERY, case_sensitive=True) +def list_databases(cur, **_): + query = 'SHOW DATABASES' + log.debug(query) + cur.execute(query) + if cur.description: + headers = [x[0] for x in cur.description] + return [(None, cur, headers, '')] + else: + return [(None, None, None, '')] + +@special_command('status', '\\s', 'Get status information from the server.', + arg_type=RAW_QUERY, aliases=('\\s', ), case_sensitive=True) +def status(cur, **_): + query = 'SHOW GLOBAL STATUS;' + log.debug(query) + try: + cur.execute(query) + except ProgrammingError: + # Fallback in case query fail, as it does with Mysql 4 + query = 'SHOW STATUS;' + log.debug(query) + cur.execute(query) + status = dict(cur.fetchall()) + + query = 'SHOW GLOBAL VARIABLES;' + log.debug(query) + cur.execute(query) + variables = dict(cur.fetchall()) + + # prepare in case keys are bytes, as with Python 3 and Mysql 4 + if (isinstance(list(variables)[0], bytes) and + isinstance(list(status)[0], bytes)): + variables = {k.decode('utf-8'): v.decode('utf-8') for k, v + in variables.items()} + status = {k.decode('utf-8'): v.decode('utf-8') for k, v + in status.items()} + + # Create output buffers. + title = [] + output = [] + footer = [] + + title.append('--------------') + + # Output the mycli client information. + implementation = platform.python_implementation() + version = platform.python_version() + client_info = [] + client_info.append('mycli {0},'.format(__version__)) + client_info.append('running on {0} {1}'.format(implementation, version)) + title.append(' '.join(client_info) + '\n') + + # Build the output that will be displayed as a table. + output.append(('Connection id:', cur.connection.thread_id())) + + query = 'SELECT DATABASE(), USER();' + log.debug(query) + cur.execute(query) + db, user = cur.fetchone() + if db is None: + db = '' + + output.append(('Current database:', db)) + output.append(('Current user:', user)) + + if iocommands.is_pager_enabled(): + if 'PAGER' in os.environ: + pager = os.environ['PAGER'] + else: + pager = 'System default' + else: + pager = 'stdout' + output.append(('Current pager:', pager)) + + output.append(('Server version:', '{0} {1}'.format( + variables['version'], variables['version_comment']))) + output.append(('Protocol version:', variables['protocol_version'])) + + if 'unix' in cur.connection.host_info.lower(): + host_info = cur.connection.host_info + else: + host_info = '{0} via TCP/IP'.format(cur.connection.host) + + output.append(('Connection:', host_info)) + + query = ('SELECT @@character_set_server, @@character_set_database, ' + '@@character_set_client, @@character_set_connection LIMIT 1;') + log.debug(query) + cur.execute(query) + charset = cur.fetchone() + output.append(('Server characterset:', charset[0])) + output.append(('Db characterset:', charset[1])) + output.append(('Client characterset:', charset[2])) + output.append(('Conn. characterset:', charset[3])) + + if 'TCP/IP' in host_info: + output.append(('TCP port:', cur.connection.port)) + else: + output.append(('UNIX socket:', variables['socket'])) + + output.append(('Uptime:', format_uptime(status['Uptime']))) + + # Print the current server statistics. + stats = [] + stats.append('Connections: {0}'.format(status['Threads_connected'])) + if 'Queries' in status: + stats.append('Queries: {0}'.format(status['Queries'])) + stats.append('Slow queries: {0}'.format(status['Slow_queries'])) + stats.append('Opens: {0}'.format(status['Opened_tables'])) + stats.append('Flush tables: {0}'.format(status['Flush_commands'])) + stats.append('Open tables: {0}'.format(status['Open_tables'])) + if 'Queries' in status: + queries_per_second = int(status['Queries']) / int(status['Uptime']) + stats.append('Queries per second avg: {:.3f}'.format( + queries_per_second)) + stats = ' '.join(stats) + footer.append('\n' + stats) + + footer.append('--------------') + return [('\n'.join(title), output, '', '\n'.join(footer))] diff --git a/mycli/packages/special/delimitercommand.py b/mycli/packages/special/delimitercommand.py new file mode 100644 index 0000000..994b134 --- /dev/null +++ b/mycli/packages/special/delimitercommand.py @@ -0,0 +1,80 @@ +import re +import sqlparse + + +class DelimiterCommand(object): + def __init__(self): + self._delimiter = ';' + + def _split(self, sql): + """Temporary workaround until sqlparse.split() learns about custom + delimiters.""" + + placeholder = "\ufffc" # unicode object replacement character + + if self._delimiter == ';': + return sqlparse.split(sql) + + # We must find a string that original sql does not contain. + # Most likely, our placeholder is enough, but if not, keep looking + while placeholder in sql: + placeholder += placeholder[0] + sql = sql.replace(';', placeholder) + sql = sql.replace(self._delimiter, ';') + + split = sqlparse.split(sql) + + return [ + stmt.replace(';', self._delimiter).replace(placeholder, ';') + for stmt in split + ] + + def queries_iter(self, input): + """Iterate over queries in the input string.""" + + queries = self._split(input) + while queries: + for sql in queries: + delimiter = self._delimiter + sql = queries.pop(0) + if sql.endswith(delimiter): + trailing_delimiter = True + sql = sql.strip(delimiter) + else: + trailing_delimiter = False + + yield sql + + # if the delimiter was changed by the last command, + # re-split everything, and if we previously stripped + # the delimiter, append it to the end + if self._delimiter != delimiter: + combined_statement = ' '.join([sql] + queries) + if trailing_delimiter: + combined_statement += delimiter + queries = self._split(combined_statement)[1:] + + def set(self, arg, **_): + """Change delimiter. + + Since `arg` is everything that follows the DELIMITER token + after sqlparse (it may include other statements separated by + the new delimiter), we want to set the delimiter to the first + word of it. + + """ + match = arg and re.search(r'[^\s]+', arg) + if not match: + message = 'Missing required argument, delimiter' + return [(None, None, None, message)] + + delimiter = match.group() + if delimiter.lower() == 'delimiter': + return [(None, None, None, 'Invalid delimiter "delimiter"')] + + self._delimiter = delimiter + return [(None, None, None, "Changed delimiter to {}".format(delimiter))] + + @property + def current(self): + return self._delimiter diff --git a/mycli/packages/special/favoritequeries.py b/mycli/packages/special/favoritequeries.py new file mode 100644 index 0000000..0b91400 --- /dev/null +++ b/mycli/packages/special/favoritequeries.py @@ -0,0 +1,63 @@ +class FavoriteQueries(object): + + section_name = 'favorite_queries' + + usage = ''' +Favorite Queries are a way to save frequently used queries +with a short name. +Examples: + + # Save a new favorite query. + > \\fs simple select * from abc where a is not Null; + + # List all favorite queries. + > \\f + ╒════════╤═══════════════════════════════════════╕ + │ Name │ Query │ + ╞════════╪═══════════════════════════════════════╡ + │ simple │ SELECT * FROM abc where a is not NULL │ + ╘════════╧═══════════════════════════════════════╛ + + # Run a favorite query. + > \\f simple + ╒════════╤════════╕ + │ a │ b │ + ╞════════╪════════╡ + │ 日本語 │ 日本語 │ + ╘════════╧════════╛ + + # Delete a favorite query. + > \\fd simple + simple: Deleted +''' + + # Class-level variable, for convenience to use as a singleton. + instance = None + + def __init__(self, config): + self.config = config + + @classmethod + def from_config(cls, config): + return FavoriteQueries(config) + + def list(self): + return self.config.get(self.section_name, []) + + def get(self, name): + return self.config.get(self.section_name, {}).get(name, None) + + def save(self, name, query): + self.config.encoding = 'utf-8' + if self.section_name not in self.config: + self.config[self.section_name] = {} + self.config[self.section_name][name] = query + self.config.write() + + def delete(self, name): + try: + del self.config[self.section_name][name] + except KeyError: + return '%s: Not Found.' % name + self.config.write() + return '%s: Deleted' % name diff --git a/mycli/packages/special/iocommands.py b/mycli/packages/special/iocommands.py new file mode 100644 index 0000000..11dca8d --- /dev/null +++ b/mycli/packages/special/iocommands.py @@ -0,0 +1,453 @@ +import os +import re +import locale +import logging +import subprocess +import shlex +from io import open +from time import sleep + +import click +import sqlparse + +from . import export +from .main import special_command, NO_QUERY, PARSED_QUERY +from .favoritequeries import FavoriteQueries +from .delimitercommand import DelimiterCommand +from .utils import handle_cd_command +from mycli.packages.prompt_utils import confirm_destructive_query + +TIMING_ENABLED = False +use_expanded_output = False +PAGER_ENABLED = True +tee_file = None +once_file = None +written_to_once_file = False +delimiter_command = DelimiterCommand() + + +@export +def set_timing_enabled(val): + global TIMING_ENABLED + TIMING_ENABLED = val + +@export +def set_pager_enabled(val): + global PAGER_ENABLED + PAGER_ENABLED = val + + +@export +def is_pager_enabled(): + return PAGER_ENABLED + +@export +@special_command('pager', '\\P [command]', + 'Set PAGER. Print the query results via PAGER.', + arg_type=PARSED_QUERY, aliases=('\\P', ), case_sensitive=True) +def set_pager(arg, **_): + if arg: + os.environ['PAGER'] = arg + msg = 'PAGER set to %s.' % arg + set_pager_enabled(True) + else: + if 'PAGER' in os.environ: + msg = 'PAGER set to %s.' % os.environ['PAGER'] + else: + # This uses click's default per echo_via_pager. + msg = 'Pager enabled.' + set_pager_enabled(True) + + return [(None, None, None, msg)] + +@export +@special_command('nopager', '\\n', 'Disable pager, print to stdout.', + arg_type=NO_QUERY, aliases=('\\n', ), case_sensitive=True) +def disable_pager(): + set_pager_enabled(False) + return [(None, None, None, 'Pager disabled.')] + +@special_command('\\timing', '\\t', 'Toggle timing of commands.', arg_type=NO_QUERY, aliases=('\\t', ), case_sensitive=True) +def toggle_timing(): + global TIMING_ENABLED + TIMING_ENABLED = not TIMING_ENABLED + message = "Timing is " + message += "on." if TIMING_ENABLED else "off." + return [(None, None, None, message)] + +@export +def is_timing_enabled(): + return TIMING_ENABLED + +@export +def set_expanded_output(val): + global use_expanded_output + use_expanded_output = val + +@export +def is_expanded_output(): + return use_expanded_output + +_logger = logging.getLogger(__name__) + +@export +def editor_command(command): + """ + Is this an external editor command? + :param command: string + """ + # It is possible to have `\e filename` or `SELECT * FROM \e`. So we check + # for both conditions. + return command.strip().endswith('\\e') or command.strip().startswith('\\e') + +@export +def get_filename(sql): + if sql.strip().startswith('\\e'): + command, _, filename = sql.partition(' ') + return filename.strip() or None + + +@export +def get_editor_query(sql): + """Get the query part of an editor command.""" + sql = sql.strip() + + # The reason we can't simply do .strip('\e') is that it strips characters, + # not a substring. So it'll strip "e" in the end of the sql also! + # Ex: "select * from style\e" -> "select * from styl". + pattern = re.compile('(^\\\e|\\\e$)') + while pattern.search(sql): + sql = pattern.sub('', sql) + + return sql + + +@export +def open_external_editor(filename=None, sql=None): + """Open external editor, wait for the user to type in their query, return + the query. + + :return: list with one tuple, query as first element. + + """ + + message = None + filename = filename.strip().split(' ', 1)[0] if filename else None + + sql = sql or '' + MARKER = '# Type your query above this line.\n' + + # Populate the editor buffer with the partial sql (if available) and a + # placeholder comment. + query = click.edit(u'{sql}\n\n{marker}'.format(sql=sql, marker=MARKER), + filename=filename, extension='.sql') + + if filename: + try: + with open(filename) as f: + query = f.read() + except IOError: + message = 'Error reading file: %s.' % filename + + if query is not None: + query = query.split(MARKER, 1)[0].rstrip('\n') + else: + # Don't return None for the caller to deal with. + # Empty string is ok. + query = sql + + return (query, message) + + +@special_command('\\f', '\\f [name [args..]]', 'List or execute favorite queries.', arg_type=PARSED_QUERY, case_sensitive=True) +def execute_favorite_query(cur, arg, **_): + """Returns (title, rows, headers, status)""" + if arg == '': + for result in list_favorite_queries(): + yield result + + """Parse out favorite name and optional substitution parameters""" + name, _, arg_str = arg.partition(' ') + args = shlex.split(arg_str) + + query = FavoriteQueries.instance.get(name) + if query is None: + message = "No favorite query: %s" % (name) + yield (None, None, None, message) + else: + query, arg_error = subst_favorite_query_args(query, args) + if arg_error: + yield (None, None, None, arg_error) + else: + for sql in sqlparse.split(query): + sql = sql.rstrip(';') + title = '> %s' % (sql) + cur.execute(sql) + if cur.description: + headers = [x[0] for x in cur.description] + yield (title, cur, headers, None) + else: + yield (title, None, None, None) + +def list_favorite_queries(): + """List of all favorite queries. + Returns (title, rows, headers, status)""" + + headers = ["Name", "Query"] + rows = [(r, FavoriteQueries.instance.get(r)) + for r in FavoriteQueries.instance.list()] + + if not rows: + status = '\nNo favorite queries found.' + FavoriteQueries.instance.usage + else: + status = '' + return [('', rows, headers, status)] + + +def subst_favorite_query_args(query, args): + """replace positional parameters ($1...$N) in query.""" + for idx, val in enumerate(args): + subst_var = '$' + str(idx + 1) + if subst_var not in query: + return [None, 'query does not have substitution parameter ' + subst_var + ':\n ' + query] + + query = query.replace(subst_var, val) + + match = re.search('\\$\d+', query) + if match: + return[None, 'missing substitution for ' + match.group(0) + ' in query:\n ' + query] + + return [query, None] + +@special_command('\\fs', '\\fs name query', 'Save a favorite query.') +def save_favorite_query(arg, **_): + """Save a new favorite query. + Returns (title, rows, headers, status)""" + + usage = 'Syntax: \\fs name query.\n\n' + FavoriteQueries.instance.usage + if not arg: + return [(None, None, None, usage)] + + name, _, query = arg.partition(' ') + + # If either name or query is missing then print the usage and complain. + if (not name) or (not query): + return [(None, None, None, + usage + 'Err: Both name and query are required.')] + + FavoriteQueries.instance.save(name, query) + return [(None, None, None, "Saved.")] + + +@special_command('\\fd', '\\fd [name]', 'Delete a favorite query.') +def delete_favorite_query(arg, **_): + """Delete an existing favorite query.""" + usage = 'Syntax: \\fd name.\n\n' + FavoriteQueries.instance.usage + if not arg: + return [(None, None, None, usage)] + + status = FavoriteQueries.instance.delete(arg) + + return [(None, None, None, status)] + + +@special_command('system', 'system [command]', + 'Execute a system shell commmand.') +def execute_system_command(arg, **_): + """Execute a system shell command.""" + usage = "Syntax: system [command].\n" + + if not arg: + return [(None, None, None, usage)] + + try: + command = arg.strip() + if command.startswith('cd'): + ok, error_message = handle_cd_command(arg) + if not ok: + return [(None, None, None, error_message)] + return [(None, None, None, '')] + + args = arg.split(' ') + process = subprocess.Popen(args, stdout=subprocess.PIPE, stderr=subprocess.PIPE) + output, error = process.communicate() + response = output if not error else error + + # Python 3 returns bytes. This needs to be decoded to a string. + if isinstance(response, bytes): + encoding = locale.getpreferredencoding(False) + response = response.decode(encoding) + + return [(None, None, None, response)] + except OSError as e: + return [(None, None, None, 'OSError: %s' % e.strerror)] + + +def parseargfile(arg): + if arg.startswith('-o '): + mode = "w" + filename = arg[3:] + else: + mode = 'a' + filename = arg + + if not filename: + raise TypeError('You must provide a filename.') + + return {'file': os.path.expanduser(filename), 'mode': mode} + + +@special_command('tee', 'tee [-o] filename', + 'Append all results to an output file (overwrite using -o).') +def set_tee(arg, **_): + global tee_file + + try: + tee_file = open(**parseargfile(arg)) + except (IOError, OSError) as e: + raise OSError("Cannot write to file '{}': {}".format(e.filename, e.strerror)) + + return [(None, None, None, "")] + +@export +def close_tee(): + global tee_file + if tee_file: + tee_file.close() + tee_file = None + + +@special_command('notee', 'notee', 'Stop writing results to an output file.') +def no_tee(arg, **_): + close_tee() + return [(None, None, None, "")] + +@export +def write_tee(output): + global tee_file + if tee_file: + click.echo(output, file=tee_file, nl=False) + click.echo(u'\n', file=tee_file, nl=False) + tee_file.flush() + + +@special_command('\\once', '\\o [-o] filename', + 'Append next result to an output file (overwrite using -o).', + aliases=('\\o', )) +def set_once(arg, **_): + global once_file, written_to_once_file + + once_file = parseargfile(arg) + written_to_once_file = False + + return [(None, None, None, "")] + + +@export +def write_once(output): + global once_file, written_to_once_file + if output and once_file: + try: + f = open(**once_file) + except (IOError, OSError) as e: + once_file = None + raise OSError("Cannot write to file '{}': {}".format( + e.filename, e.strerror)) + with f: + click.echo(output, file=f, nl=False) + click.echo(u"\n", file=f, nl=False) + written_to_once_file = True + + +@export +def unset_once_if_written(): + """Unset the once file, if it has been written to.""" + global once_file + if written_to_once_file: + once_file = None + + +@special_command( + 'watch', + 'watch [seconds] [-c] query', + 'Executes the query every [seconds] seconds (by default 5).' +) +def watch_query(arg, **kwargs): + usage = """Syntax: watch [seconds] [-c] query. + * seconds: The interval at the query will be repeated, in seconds. + By default 5. + * -c: Clears the screen between every iteration. +""" + if not arg: + yield (None, None, None, usage) + return + seconds = 5 + clear_screen = False + statement = None + while statement is None: + arg = arg.strip() + if not arg: + # Oops, we parsed all the arguments without finding a statement + yield (None, None, None, usage) + return + (current_arg, _, arg) = arg.partition(' ') + try: + seconds = float(current_arg) + continue + except ValueError: + pass + if current_arg == '-c': + clear_screen = True + continue + statement = '{0!s} {1!s}'.format(current_arg, arg) + destructive_prompt = confirm_destructive_query(statement) + if destructive_prompt is False: + click.secho("Wise choice!") + return + elif destructive_prompt is True: + click.secho("Your call!") + cur = kwargs['cur'] + sql_list = [ + (sql.rstrip(';'), "> {0!s}".format(sql)) + for sql in sqlparse.split(statement) + ] + old_pager_enabled = is_pager_enabled() + while True: + if clear_screen: + click.clear() + try: + # Somewhere in the code the pager its activated after every yield, + # so we disable it in every iteration + set_pager_enabled(False) + for (sql, title) in sql_list: + cur.execute(sql) + if cur.description: + headers = [x[0] for x in cur.description] + yield (title, cur, headers, None) + else: + yield (title, None, None, None) + sleep(seconds) + except KeyboardInterrupt: + # This prints the Ctrl-C character in its own line, which prevents + # to print a line with the cursor positioned behind the prompt + click.secho("", nl=True) + return + finally: + set_pager_enabled(old_pager_enabled) + + +@export +@special_command('delimiter', None, 'Change SQL delimiter.') +def set_delimiter(arg, **_): + return delimiter_command.set(arg) + + +@export +def get_current_delimiter(): + return delimiter_command.current + + +@export +def split_queries(input): + for query in delimiter_command.queries_iter(input): + yield query diff --git a/mycli/packages/special/main.py b/mycli/packages/special/main.py new file mode 100644 index 0000000..dddba66 --- /dev/null +++ b/mycli/packages/special/main.py @@ -0,0 +1,118 @@ +import logging +from collections import namedtuple + +from . import export + +log = logging.getLogger(__name__) + +NO_QUERY = 0 +PARSED_QUERY = 1 +RAW_QUERY = 2 + +SpecialCommand = namedtuple('SpecialCommand', + ['handler', 'command', 'shortcut', 'description', 'arg_type', 'hidden', + 'case_sensitive']) + +COMMANDS = {} + +@export +class CommandNotFound(Exception): + pass + +@export +def parse_special_command(sql): + command, _, arg = sql.partition(' ') + verbose = '+' in command + command = command.strip().replace('+', '') + return (command, verbose, arg.strip()) + +@export +def special_command(command, shortcut, description, arg_type=PARSED_QUERY, + hidden=False, case_sensitive=False, aliases=()): + def wrapper(wrapped): + register_special_command(wrapped, command, shortcut, description, + arg_type, hidden, case_sensitive, aliases) + return wrapped + return wrapper + +@export +def register_special_command(handler, command, shortcut, description, + arg_type=PARSED_QUERY, hidden=False, case_sensitive=False, aliases=()): + cmd = command.lower() if not case_sensitive else command + COMMANDS[cmd] = SpecialCommand(handler, command, shortcut, description, + arg_type, hidden, case_sensitive) + for alias in aliases: + cmd = alias.lower() if not case_sensitive else alias + COMMANDS[cmd] = SpecialCommand(handler, command, shortcut, description, + arg_type, case_sensitive=case_sensitive, + hidden=True) + +@export +def execute(cur, sql): + """Execute a special command and return the results. If the special command + is not supported a KeyError will be raised. + """ + command, verbose, arg = parse_special_command(sql) + + if (command not in COMMANDS) and (command.lower() not in COMMANDS): + raise CommandNotFound + + try: + special_cmd = COMMANDS[command] + except KeyError: + special_cmd = COMMANDS[command.lower()] + if special_cmd.case_sensitive: + raise CommandNotFound('Command not found: %s' % command) + + # "help <SQL KEYWORD> is a special case. We want built-in help, not + # mycli help here. + if command == 'help' and arg: + return show_keyword_help(cur=cur, arg=arg) + + if special_cmd.arg_type == NO_QUERY: + return special_cmd.handler() + elif special_cmd.arg_type == PARSED_QUERY: + return special_cmd.handler(cur=cur, arg=arg, verbose=verbose) + elif special_cmd.arg_type == RAW_QUERY: + return special_cmd.handler(cur=cur, query=sql) + +@special_command('help', '\\?', 'Show this help.', arg_type=NO_QUERY, aliases=('\\?', '?')) +def show_help(): # All the parameters are ignored. + headers = ['Command', 'Shortcut', 'Description'] + result = [] + + for _, value in sorted(COMMANDS.items()): + if not value.hidden: + result.append((value.command, value.shortcut, value.description)) + return [(None, result, headers, None)] + +def show_keyword_help(cur, arg): + """ + Call the built-in "show <command>", to display help for an SQL keyword. + :param cur: cursor + :param arg: string + :return: list + """ + keyword = arg.strip('"').strip("'") + query = "help '{0}'".format(keyword) + log.debug(query) + cur.execute(query) + if cur.description and cur.rowcount > 0: + headers = [x[0] for x in cur.description] + return [(None, cur, headers, '')] + else: + return [(None, None, None, 'No help found for {0}.'.format(keyword))] + + +@special_command('exit', '\\q', 'Exit.', arg_type=NO_QUERY, aliases=('\\q', )) +@special_command('quit', '\\q', 'Quit.', arg_type=NO_QUERY) +def quit(*_args): + raise EOFError + + +@special_command('\\e', '\\e', 'Edit command with editor (uses $EDITOR).', + arg_type=NO_QUERY, case_sensitive=True) +@special_command('\\G', '\\G', 'Display current query results vertically.', + arg_type=NO_QUERY, case_sensitive=True) +def stub(): + raise NotImplementedError diff --git a/mycli/packages/special/utils.py b/mycli/packages/special/utils.py new file mode 100644 index 0000000..ef96093 --- /dev/null +++ b/mycli/packages/special/utils.py @@ -0,0 +1,46 @@ +import os +import subprocess + +def handle_cd_command(arg): + """Handles a `cd` shell command by calling python's os.chdir.""" + CD_CMD = 'cd' + tokens = arg.split(CD_CMD + ' ') + directory = tokens[-1] if len(tokens) > 1 else None + if not directory: + return False, "No folder name was provided." + try: + os.chdir(directory) + subprocess.call(['pwd']) + return True, None + except OSError as e: + return False, e.strerror + +def format_uptime(uptime_in_seconds): + """Format number of seconds into human-readable string. + + :param uptime_in_seconds: The server uptime in seconds. + :returns: A human-readable string representing the uptime. + + >>> uptime = format_uptime('56892') + >>> print(uptime) + 15 hours 48 min 12 sec + """ + + m, s = divmod(int(uptime_in_seconds), 60) + h, m = divmod(m, 60) + d, h = divmod(h, 24) + + uptime_values = [] + + for value, unit in ((d, 'days'), (h, 'hours'), (m, 'min'), (s, 'sec')): + if value == 0 and not uptime_values: + # Don't include a value/unit if the unit isn't applicable to + # the uptime. E.g. don't do 0 days 0 hours 1 min 30 sec. + continue + elif value == 1 and unit.endswith('s'): + # Remove the "s" if the unit is singular. + unit = unit[:-1] + uptime_values.append('{0} {1}'.format(value, unit)) + + uptime = ' '.join(uptime_values) + return uptime |