view hgext/infinitepush/sqlindexapi.py @ 44073:b9e174d4ed11

verify: allow the storage to signal when renames can be tested on `skipread`

This applies the new marker in the lfs handler to show it in action, and adds
the test mentioned at the beginning of the series to show that fulltext isn't
necessary in the LFS case.

The existing `skipread` isn't enough, because it is also set if an error occurs
reading the revlog data, or the data is censored.  It could probably be cleared,
but then it technically violates the interface contract.  That wouldn't matter
for the existing verify algorithm, but it isn't clear how that will change as
alternate storage support is added.

The flag is probably pretty revlog specific, given the comments in verify.py.
But there's already filelog specific stuff in there and I'm not sure what future
storage will bring, so I don't want to over-engineer this.  Likewise, I'm not
sure that we want the verify method for each storage type to completely drive
the bus when it comes to detecting renames, so I don't want to go down the
rabbithole of having verifyintegrity() return metadata hints at this point.

Differential Revision: https://phab.mercurial-scm.org/D7713

# Infinite push
#
# Copyright 2016 Facebook, Inc.
#
# This software may be used and distributed according to the terms of the
# GNU General Public License version 2 or any later version.

from __future__ import absolute_import

import logging
import os
import time

import warnings
import mysql.connector

from mercurial import pycompat

from . import indexapi


def _convertbookmarkpattern(pattern):
    pattern = pattern.replace(b'_', b'\\_')
    pattern = pattern.replace(b'%', b'\\%')
    if pattern.endswith(b'*'):
        pattern = pattern[:-1] + b'%'
    return pattern


class sqlindexapi(indexapi.indexapi):
    '''
    Sql backend for infinitepush index. See schema.sql
    '''

    def __init__(
        self,
        reponame,
        host,
        port,
        database,
        user,
        password,
        logfile,
        loglevel,
        waittimeout=300,
        locktimeout=120,
    ):
        super(sqlindexapi, self).__init__()
        self.reponame = reponame
        self.sqlargs = {
            b'host': host,
            b'port': port,
            b'database': database,
            b'user': user,
            b'password': password,
        }
        self.sqlconn = None
        self.sqlcursor = None
        if not logfile:
            logfile = os.devnull
        logging.basicConfig(filename=logfile)
        self.log = logging.getLogger()
        self.log.setLevel(loglevel)
        self._connected = False
        self._waittimeout = waittimeout
        self._locktimeout = locktimeout

    def sqlconnect(self):
        if self.sqlconn:
            raise indexapi.indexexception(b"SQL connection already open")
        if self.sqlcursor:
            raise indexapi.indexexception(
                b"SQL cursor already open without connection"
            )
        retry = 3
        while True:
            try:
                self.sqlconn = mysql.connector.connect(**self.sqlargs)

                # Code is copy-pasted from hgsql. Bug fixes need to be
                # back-ported!
                # The default behavior is to return byte arrays, when we
                # need strings. This custom convert returns strings.
                self.sqlconn.set_converter_class(CustomConverter)
                self.sqlconn.autocommit = False
                break
            except mysql.connector.errors.Error:
                # mysql can be flakey occasionally, so do some minimal
                # retrying.
                retry -= 1
                if retry == 0:
                    raise
                time.sleep(0.2)

        waittimeout = self.sqlconn.converter.escape(b'%s' % self._waittimeout)

        self.sqlcursor = self.sqlconn.cursor()
        self.sqlcursor.execute(b"SET wait_timeout=%s" % waittimeout)
        self.sqlcursor.execute(
            b"SET innodb_lock_wait_timeout=%s" % self._locktimeout
        )
        self._connected = True

    def close(self):
        """Cleans up the metadata store connection."""
        with warnings.catch_warnings():
            warnings.simplefilter(b"ignore")
            self.sqlcursor.close()
            self.sqlconn.close()
        self.sqlcursor = None
        self.sqlconn = None

    def __enter__(self):
        if not self._connected:
            self.sqlconnect()
        return self

    def __exit__(self, exc_type, exc_val, exc_tb):
        if exc_type is None:
            self.sqlconn.commit()
        else:
            self.sqlconn.rollback()

    def addbundle(self, bundleid, nodesctx):
        if not self._connected:
            self.sqlconnect()
        self.log.info(b"ADD BUNDLE %r %r" % (self.reponame, bundleid))
        self.sqlcursor.execute(
            b"INSERT INTO bundles(bundle, reponame) VALUES (%s, %s)",
            params=(bundleid, self.reponame),
        )
        for ctx in nodesctx:
            self.sqlcursor.execute(
                b"INSERT INTO nodestobundle(node, bundle, reponame) "
                b"VALUES (%s, %s, %s) ON DUPLICATE KEY UPDATE "
                b"bundle=VALUES(bundle)",
                params=(ctx.hex(), bundleid, self.reponame),
            )

            extra = ctx.extra()
            author_name = ctx.user()
            committer_name = extra.get(b'committer', ctx.user())
            author_date = int(ctx.date()[0])
            committer_date = int(extra.get(b'committer_date', author_date))
            self.sqlcursor.execute(
                b"INSERT IGNORE INTO nodesmetadata(node, message, p1, p2, "
                b"author, committer, author_date, committer_date, "
                b"reponame) VALUES "
                b"(%s, %s, %s, %s, %s, %s, %s, %s, %s)",
                params=(
                    ctx.hex(),
                    ctx.description(),
                    ctx.p1().hex(),
                    ctx.p2().hex(),
                    author_name,
                    committer_name,
                    author_date,
                    committer_date,
                    self.reponame,
                ),
            )

    def addbookmark(self, bookmark, node):
        """Takes a bookmark name and hash, and records mapping in the metadata
        store."""
        if not self._connected:
            self.sqlconnect()
        self.log.info(
            b"ADD BOOKMARKS %r bookmark: %r node: %r"
            % (self.reponame, bookmark, node)
        )
        self.sqlcursor.execute(
            b"INSERT INTO bookmarkstonode(bookmark, node, reponame) "
            b"VALUES (%s, %s, %s) ON DUPLICATE KEY UPDATE node=VALUES(node)",
            params=(bookmark, node, self.reponame),
        )

    def addmanybookmarks(self, bookmarks):
        if not self._connected:
            self.sqlconnect()
        args = []
        values = []
        for bookmark, node in pycompat.iteritems(bookmarks):
            args.append(b'(%s, %s, %s)')
            values.extend((bookmark, node, self.reponame))
        args = b','.join(args)

        self.sqlcursor.execute(
            b"INSERT INTO bookmarkstonode(bookmark, node, reponame) "
            b"VALUES %s ON DUPLICATE KEY UPDATE node=VALUES(node)" % args,
            params=values,
        )

    def deletebookmarks(self, patterns):
        """Accepts list of bookmark patterns and deletes them.
        If `commit` is set then bookmark will actually be deleted. Otherwise
        deletion will be delayed until the end of transaction.
        """
        if not self._connected:
            self.sqlconnect()
        self.log.info(b"DELETE BOOKMARKS: %s" % patterns)
        for pattern in patterns:
            pattern = _convertbookmarkpattern(pattern)
            self.sqlcursor.execute(
                b"DELETE from bookmarkstonode WHERE bookmark LIKE (%s) "
                b"and reponame = %s",
                params=(pattern, self.reponame),
            )

    def getbundle(self, node):
        """Returns the bundleid for the bundle that contains the given node."""
        if not self._connected:
            self.sqlconnect()
        self.log.info(b"GET BUNDLE %r %r" % (self.reponame, node))
        self.sqlcursor.execute(
            b"SELECT bundle from nodestobundle "
            b"WHERE node = %s AND reponame = %s",
            params=(node, self.reponame),
        )
        result = self.sqlcursor.fetchall()
        if len(result) != 1 or len(result[0]) != 1:
            self.log.info(b"No matching node")
            return None
        bundle = result[0][0]
        self.log.info(b"Found bundle %r" % bundle)
        return bundle

    def getnode(self, bookmark):
        """Returns the node for the given bookmark. None if it doesn't exist."""
        if not self._connected:
            self.sqlconnect()
        self.log.info(
            b"GET NODE reponame: %r bookmark: %r" % (self.reponame, bookmark)
        )
        self.sqlcursor.execute(
            b"SELECT node from bookmarkstonode WHERE "
            b"bookmark = %s AND reponame = %s",
            params=(bookmark, self.reponame),
        )
        result = self.sqlcursor.fetchall()
        if len(result) != 1 or len(result[0]) != 1:
            self.log.info(b"No matching bookmark")
            return None
        node = result[0][0]
        self.log.info(b"Found node %r" % node)
        return node

    def getbookmarks(self, query):
        if not self._connected:
            self.sqlconnect()
        self.log.info(
            b"QUERY BOOKMARKS reponame: %r query: %r" % (self.reponame, query)
        )
        query = _convertbookmarkpattern(query)
        self.sqlcursor.execute(
            b"SELECT bookmark, node from bookmarkstonode WHERE "
            b"reponame = %s AND bookmark LIKE %s",
            params=(self.reponame, query),
        )
        result = self.sqlcursor.fetchall()
        bookmarks = {}
        for row in result:
            if len(row) != 2:
                self.log.info(b"Bad row returned: %s" % row)
                continue
            bookmarks[row[0]] = row[1]
        return bookmarks

    def saveoptionaljsonmetadata(self, node, jsonmetadata):
        if not self._connected:
            self.sqlconnect()
        self.log.info(
            (
                b"INSERT METADATA, QUERY BOOKMARKS reponame: %r "
                + b"node: %r, jsonmetadata: %s"
            )
            % (self.reponame, node, jsonmetadata)
        )

        self.sqlcursor.execute(
            b"UPDATE nodesmetadata SET optional_json_metadata=%s WHERE "
            b"reponame=%s AND node=%s",
            params=(jsonmetadata, self.reponame, node),
        )


class CustomConverter(mysql.connector.conversion.MySQLConverter):
    """Ensure that all values being returned are returned as python string
    (versus the default byte arrays)."""

    def _STRING_to_python(self, value, dsc=None):
        return str(value)

    def _VAR_STRING_to_python(self, value, dsc=None):
        return str(value)

    def _BLOB_to_python(self, value, dsc=None):
        return str(value)