view tests/test-remotefilelog-datapack.py @ 44763:94f4f2ec7dee stable

packaging: support building Inno installer with PyOxidizer

We want to start distributing Mercurial on Python 3 on
Windows. PyOxidizer will be our vehicle for achieving that.

This commit implements basic support for producing Inno
installers using PyOxidizer.

While it is an eventual goal of PyOxidizer to produce
installers, those features aren't yet implemented. So our
strategy for producing Mercurial installers is similar to
what we've been doing with py2exe: invoke a build system to
produce files then stage those files into a directory so they
can be turned into an installer.

We had to make significant alterations to the pyoxidizer.bzl
config file to get it to produce the files that we desire for
a Windows install. This meant differentiating the build targets
so we can target Windows specifically.

We've added a new module to hgpackaging to deal with interacting
with PyOxidizer. It is similar to pyexe: we invoke a build process
then copy files to a staging directory. Ideally these extra
files would be defined in pyoxidizer.bzl. But I don't think it
is worth doing at this time, as PyOxidizer's config files are
lacking some features to make this turnkey.

The rest of the change is introducing a variant of the
Inno installer code that invokes PyOxidizer instead of
py2exe.

Comparing the Python 2.7 based Inno installers with this
one, the following changes were observed:

* No lib/*.{pyd, dll} files
* No Microsoft.VC90.CRT.manifest
* No msvc{m,p,r}90.dll files
* python27.dll replaced with python37.dll
* Add vcruntime140.dll file

The disappearance of the .pyd and .dll files is acceptable, as
PyOxidizer has embedded these in hg.exe and loads them from
memory.

The disappearance of the *90* files is acceptable because those
provide the Visual C++ 9 runtime, as required by Python 2.7.
Similarly, the appearance of vcruntime140.dll is a requirement
of Python 3.7.

Differential Revision: https://phab.mercurial-scm.org/D8473

#!/usr/bin/env python
from __future__ import absolute_import, print_function

import hashlib
import os
import random
import shutil
import stat
import struct
import sys
import tempfile
import time
import unittest

import silenttestrunner

# Load the local remotefilelog, not the system one
sys.path[0:0] = [os.path.join(os.path.dirname(__file__), '..')]
from mercurial.node import nullid
from mercurial import policy

if not policy._packageprefs.get(policy.policy, (False, False))[1]:
    if __name__ == '__main__':
        msg = "skipped: pure module not available with module policy:"
        print(msg, policy.policy, file=sys.stderr)
        sys.exit(80)

from mercurial import (
    pycompat,
    ui as uimod,
)
from hgext.remotefilelog import (
    basepack,
    constants,
    datapack,
)


class datapacktestsbase(object):
    def __init__(self, datapackreader, paramsavailable):
        self.datapackreader = datapackreader
        self.paramsavailable = paramsavailable

    def setUp(self):
        self.tempdirs = []

    def tearDown(self):
        for d in self.tempdirs:
            shutil.rmtree(d)

    def makeTempDir(self):
        tempdir = pycompat.bytestr(tempfile.mkdtemp())
        self.tempdirs.append(tempdir)
        return tempdir

    def getHash(self, content):
        return hashlib.sha1(content).digest()

    def getFakeHash(self):
        return b''.join(
            pycompat.bytechr(random.randint(0, 255)) for _ in range(20)
        )

    def createPack(self, revisions=None, packdir=None):
        if revisions is None:
            revisions = [(b"filename", self.getFakeHash(), nullid, b"content")]

        if packdir is None:
            packdir = self.makeTempDir()

        packer = datapack.mutabledatapack(uimod.ui(), packdir, version=2)

        for args in revisions:
            filename, node, base, content = args[0:4]
            # meta is optional
            meta = None
            if len(args) > 4:
                meta = args[4]
            packer.add(filename, node, base, content, metadata=meta)

        path = packer.close()
        return self.datapackreader(path)

    def _testAddSingle(self, content):
        """Test putting a simple blob into a pack and reading it out.
        """
        filename = b"foo"
        node = self.getHash(content)

        revisions = [(filename, node, nullid, content)]
        pack = self.createPack(revisions)
        if self.paramsavailable:
            self.assertEqual(
                pack.params.fanoutprefix, basepack.SMALLFANOUTPREFIX
            )

        chain = pack.getdeltachain(filename, node)
        self.assertEqual(content, chain[0][4])

    def testAddSingle(self):
        self._testAddSingle(b'')

    def testAddSingleEmpty(self):
        self._testAddSingle(b'abcdef')

    def testAddMultiple(self):
        """Test putting multiple unrelated blobs into a pack and reading them
        out.
        """
        revisions = []
        for i in range(10):
            filename = b"foo%d" % i
            content = b"abcdef%d" % i
            node = self.getHash(content)
            revisions.append((filename, node, self.getFakeHash(), content))

        pack = self.createPack(revisions)

        for filename, node, base, content in revisions:
            entry = pack.getdelta(filename, node)
            self.assertEqual((content, filename, base, {}), entry)

            chain = pack.getdeltachain(filename, node)
            self.assertEqual(content, chain[0][4])

    def testAddDeltas(self):
        """Test putting multiple delta blobs into a pack and read the chain.
        """
        revisions = []
        filename = b"foo"
        lastnode = nullid
        for i in range(10):
            content = b"abcdef%d" % i
            node = self.getHash(content)
            revisions.append((filename, node, lastnode, content))
            lastnode = node

        pack = self.createPack(revisions)

        entry = pack.getdelta(filename, revisions[0][1])
        realvalue = (revisions[0][3], filename, revisions[0][2], {})
        self.assertEqual(entry, realvalue)

        # Test that the chain for the final entry has all the others
        chain = pack.getdeltachain(filename, node)
        for i in range(10):
            content = b"abcdef%d" % i
            self.assertEqual(content, chain[-i - 1][4])

    def testPackMany(self):
        """Pack many related and unrelated objects.
        """
        # Build a random pack file
        revisions = []
        blobs = {}
        random.seed(0)
        for i in range(100):
            filename = b"filename-%d" % i
            filerevs = []
            for j in range(random.randint(1, 100)):
                content = b"content-%d" % j
                node = self.getHash(content)
                lastnode = nullid
                if len(filerevs) > 0:
                    lastnode = filerevs[random.randint(0, len(filerevs) - 1)]
                filerevs.append(node)
                blobs[(filename, node, lastnode)] = content
                revisions.append((filename, node, lastnode, content))

        pack = self.createPack(revisions)

        # Verify the pack contents
        for (filename, node, lastnode), content in sorted(blobs.items()):
            chain = pack.getdeltachain(filename, node)
            for entry in chain:
                expectedcontent = blobs[(entry[0], entry[1], entry[3])]
                self.assertEqual(entry[4], expectedcontent)

    def testPackMetadata(self):
        revisions = []
        for i in range(100):
            filename = b'%d.txt' % i
            content = b'put-something-here \n' * i
            node = self.getHash(content)
            meta = {
                constants.METAKEYFLAG: i ** 4,
                constants.METAKEYSIZE: len(content),
                b'Z': b'random_string',
                b'_': b'\0' * i,
            }
            revisions.append((filename, node, nullid, content, meta))
        pack = self.createPack(revisions)
        for name, node, x, content, origmeta in revisions:
            parsedmeta = pack.getmeta(name, node)
            # flag == 0 should be optimized out
            if origmeta[constants.METAKEYFLAG] == 0:
                del origmeta[constants.METAKEYFLAG]
            self.assertEqual(parsedmeta, origmeta)

    def testGetMissing(self):
        """Test the getmissing() api.
        """
        revisions = []
        filename = b"foo"
        lastnode = nullid
        for i in range(10):
            content = b"abcdef%d" % i
            node = self.getHash(content)
            revisions.append((filename, node, lastnode, content))
            lastnode = node

        pack = self.createPack(revisions)

        missing = pack.getmissing([(b"foo", revisions[0][1])])
        self.assertFalse(missing)

        missing = pack.getmissing(
            [(b"foo", revisions[0][1]), (b"foo", revisions[1][1])]
        )
        self.assertFalse(missing)

        fakenode = self.getFakeHash()
        missing = pack.getmissing(
            [(b"foo", revisions[0][1]), (b"foo", fakenode)]
        )
        self.assertEqual(missing, [(b"foo", fakenode)])

    def testAddThrows(self):
        pack = self.createPack()

        try:
            pack.add(b'filename', nullid, b'contents')
            self.assertTrue(False, "datapack.add should throw")
        except RuntimeError:
            pass

    def testBadVersionThrows(self):
        pack = self.createPack()
        path = pack.path + b'.datapack'
        with open(path, 'rb') as f:
            raw = f.read()
        raw = struct.pack('!B', 255) + raw[1:]
        os.chmod(path, os.stat(path).st_mode | stat.S_IWRITE)
        with open(path, 'wb+') as f:
            f.write(raw)

        try:
            self.datapackreader(pack.path)
            self.assertTrue(False, "bad version number should have thrown")
        except RuntimeError:
            pass

    def testMissingDeltabase(self):
        fakenode = self.getFakeHash()
        revisions = [(b"filename", fakenode, self.getFakeHash(), b"content")]
        pack = self.createPack(revisions)
        chain = pack.getdeltachain(b"filename", fakenode)
        self.assertEqual(len(chain), 1)

    def testLargePack(self):
        """Test creating and reading from a large pack with over X entries.
        This causes it to use a 2^16 fanout table instead."""
        revisions = []
        blobs = {}
        total = basepack.SMALLFANOUTCUTOFF + 1
        for i in pycompat.xrange(total):
            filename = b"filename-%d" % i
            content = filename
            node = self.getHash(content)
            blobs[(filename, node)] = content
            revisions.append((filename, node, nullid, content))

        pack = self.createPack(revisions)
        if self.paramsavailable:
            self.assertEqual(
                pack.params.fanoutprefix, basepack.LARGEFANOUTPREFIX
            )

        for (filename, node), content in blobs.items():
            actualcontent = pack.getdeltachain(filename, node)[0][4]
            self.assertEqual(actualcontent, content)

    def testPacksCache(self):
        """Test that we remember the most recent packs while fetching the delta
        chain."""

        packdir = self.makeTempDir()
        deltachains = []

        numpacks = 10
        revisionsperpack = 100

        for i in range(numpacks):
            chain = []
            revision = (b'%d' % i, self.getFakeHash(), nullid, b"content")

            for _ in range(revisionsperpack):
                chain.append(revision)
                revision = (
                    b'%d' % i,
                    self.getFakeHash(),
                    revision[1],
                    self.getFakeHash(),
                )

            self.createPack(chain, packdir)
            deltachains.append(chain)

        class testdatapackstore(datapack.datapackstore):
            # Ensures that we are not keeping everything in the cache.
            DEFAULTCACHESIZE = numpacks // 2

        store = testdatapackstore(uimod.ui(), packdir)

        random.shuffle(deltachains)
        for randomchain in deltachains:
            revision = random.choice(randomchain)
            chain = store.getdeltachain(revision[0], revision[1])

            mostrecentpack = next(iter(store.packs), None)
            self.assertEqual(
                mostrecentpack.getdeltachain(revision[0], revision[1]), chain
            )

            self.assertEqual(randomchain.index(revision) + 1, len(chain))

    # perf test off by default since it's slow
    def _testIndexPerf(self):
        random.seed(0)
        print("Multi-get perf test")
        packsizes = [
            100,
            10000,
            100000,
            500000,
            1000000,
            3000000,
        ]
        lookupsizes = [
            10,
            100,
            1000,
            10000,
            100000,
            1000000,
        ]
        for packsize in packsizes:
            revisions = []
            for i in pycompat.xrange(packsize):
                filename = b"filename-%d" % i
                content = b"content-%d" % i
                node = self.getHash(content)
                revisions.append((filename, node, nullid, content))

            path = self.createPack(revisions).path

            # Perf of large multi-get
            import gc

            gc.disable()
            pack = self.datapackreader(path)
            for lookupsize in lookupsizes:
                if lookupsize > packsize:
                    continue
                random.shuffle(revisions)
                findnodes = [(rev[0], rev[1]) for rev in revisions]

                start = time.time()
                pack.getmissing(findnodes[:lookupsize])
                elapsed = time.time() - start
                print(
                    "%s pack %d lookups = %0.04f"
                    % (
                        ('%d' % packsize).rjust(7),
                        ('%d' % lookupsize).rjust(7),
                        elapsed,
                    )
                )

            print("")
            gc.enable()

        # The perf test is meant to produce output, so we always fail the test
        # so the user sees the output.
        raise RuntimeError("perf test always fails")


class datapacktests(datapacktestsbase, unittest.TestCase):
    def __init__(self, *args, **kwargs):
        datapacktestsbase.__init__(self, datapack.datapack, True)
        unittest.TestCase.__init__(self, *args, **kwargs)


# TODO:
# datapack store:
# - getmissing
# - GC two packs into one

if __name__ == '__main__':
    if pycompat.iswindows:
        sys.exit(80)  # Skip on Windows
    silenttestrunner.main(__name__)