# Copyright (C) 2007, 2008, 2009 by Intevation GmbH
# Authors:
# Bernhard Herzog <bh@intevation.de>
#
# This program is free software under the GPL (>=v2)
# Read the file COPYING coming with the software for details.

"""Tests for treepkg.builder"""

import sys
import os
import unittest
import StringIO

from treepkg.builder import PBuilder
from treepkg.run import call

from filesupport import FileTestMixin

# helper program to dump the command line arguments into a file so that
# test cases can check them.  Also if the environment variable
# TREEPKG_TEST is set, create the file named by it.
dump_command_line_py = """
import sys, os
open(sys.argv[1], 'w').write(repr(sys.argv[2:]))
value = os.environ.get('TREEPKG_TEST')
if value:
    open(value, 'w').close()
"""

class PBuilderTests(unittest.TestCase, FileTestMixin):

    def setUp(self):
        self.dump_command_line = self.create_temp_file("dump_command_line.py",
                                                       dump_command_line_py)
        self.command_line_file = self.temp_file_name("command_line")
        self.root_command = [sys.executable, self.dump_command_line,
                             self.command_line_file]

    def check_command_line(self, args):
        self.check_file_contents(self.command_line_file, repr(args))


class TestPBuilder(PBuilderTests):

    def test_init_pbuilder(self):
        """Tests the PBuilder.init_builder method."""
        basedir = self.create_temp_dir("pbuilder")
        pbuilderrc = os.path.join(basedir, "pbuilderrc")
        builder = PBuilder(pbuilderrc, self.root_command)
        old_stdout = sys.stdout
        sys.stdout = captured_stdout = StringIO.StringIO()
        try:
            builder.init_builder(distribution="etch",
                                  mirrorsite="http://example.com/debian",
                                  extramirrors=None)
        finally:
            sys.stdout = old_stdout

        # check whether the necessary directories were created
        missing = [dirname for dirname in ["base", "build", "result",
                                           "aptcache", "extra-pkg"]
                   if not os.path.isdir(os.path.join(basedir, dirname))]
        if missing:
            self.fail("init_builder did not create these directories: %s"
                      % " ".join(missing))

        # check the pbuilderrc.  This test is a little too strict
        # because it checks the exact contents of the file.  Instread it
        # should normalize the contents in some way and check that.
        pbuilderrc_contents = (
            "# This file was automatically generated by initpbuilder.py.\n"
            "# for the possible settings see \"man pbuilderrc\"\n"
            "\n"
            "BASETGZ=%(basedir)s/base/base.tgz\n"
            "BUILDPLACE=%(basedir)s/build\n"
            "USEPROC=yes\n"
            "USEDEVPTS=yes\n"
            "BUILDRESULT=%(basedir)s/result\n"
            "DISTRIBUTION=etch\n"
            "APTCACHE=%(basedir)s/aptcache\n"
            "APTCACHEHARDLINK=yes\n"
            "REMOVEPACKAGES=lilo\n"
            "MIRRORSITE=\"http://example.com/debian\"\n"
            "OTHERMIRROR=\"deb file://%(basedir)s/extra-pkg ./\"\n"
            "BINDMOUNTS=\"%(basedir)s/extra-pkg\"\n"
            "PKGNAME_LOGFILE=yes\n" % locals())
        self.check_file_contents(pbuilderrc, pbuilderrc_contents)

        # The Packages file is empty for now.
        self.check_file_contents(os.path.join(basedir, "extra-pkg", "Packages"),
                                 "")
        # check the text written to stdout.  This test is a little too
        # strict because it checks the exact output.
        self.assertEquals(captured_stdout.getvalue(),
                          "creating directory: '%(basedir_repr)s/base'\n"
                          "creating directory: '%(basedir_repr)s/build'\n"
                          "creating directory: '%(basedir_repr)s/result'\n"
                          "creating directory: '%(basedir_repr)s/aptcache'\n"
                          "creating directory: '%(basedir_repr)s/extra-pkg'\n"
                          "creating pbuilderrc: '%(basedir_repr)s/pbuilderrc'\n"
                          "turning the extra-pkg dir into a debian archive\n"
                          "running pbuilder create\n"
                          % dict(basedir_repr=repr(basedir)[1:-1]))

    def test_init_pbuilder_run_twice(self):
        """Tests whether PBuilder.init_builder prints an error when run twice.
        """
        basedir = self.create_temp_dir("pbuilder")

        # run it once
        pbuilderrc = os.path.join(basedir, "pbuilderrc")
        builder = PBuilder(pbuilderrc, self.root_command)
        old_stdout = sys.stdout
        sys.stdout = captured_stdout = StringIO.StringIO()
        try:
            builder.init_builder(distribution="etch",
                                  mirrorsite="http://example.com/debian",
                                  extramirrors=None)
        finally:
            sys.stdout = old_stdout

        # running it again should not modify anything in the directory
        # (which we don't check currently), it should print an error
        # message and exit with exit code 1.
        old_stderr = sys.stderr
        sys.stderr = captured_stderr = StringIO.StringIO()
        try:
            try:
                builder.init_builder(distribution="etch",
                                      mirrorsite="http://example.com/debian",
                                      extramirrors=None)
            except SystemExit, exc:
                self.assertEquals(exc.code, 1)
        finally:
            sys.stderr = old_stderr
        self.assertEquals("pbuilderrc %r already exists.\n"
                          % os.path.join(basedir, "pbuilderrc"),
                          captured_stderr.getvalue())

    def test_update(self):
        """Tests the PBuilder.update method."""
        builder = PBuilder("my_pbuilderrc", self.root_command)
        builder.update()
        self.check_command_line(['/usr/sbin/pbuilder', 'update',
                                 '--configfile', 'my_pbuilderrc'])

    def test_build(self):
        """Tests the PBuilder.build method.
        The test checks whether the build method creates the binary_dir
        and then checks the arguments with which the root command is
        called.  The test is a little too strict because it expects a
        specific order of the arguments even though the order of some of
        the arguments doesn't matter.

        A more thorough test of the build method is implicity done by
        the packager tests.
        """
        binary_dir_name = self.temp_file_name("binary")
        if os.path.exists(binary_dir_name):
            os.rmdir(binary_dir_name)
        # sanity check: the binary directory must not exist yet.
        self.failIf(os.path.exists(binary_dir_name))

        logfilename = self.temp_file_name("the_logfile")

        builder = PBuilder("my_pbuilderrc", self.root_command)
        builder.build("my_dsc_file", binary_dir_name, logfilename)
        self.check_command_line(['/usr/sbin/pbuilder', 'build',
                                 '--configfile', 'my_pbuilderrc',
                                 '--logfile', logfilename,
                                 '--buildresult', binary_dir_name,
                                 '--debbuildopts', '-b',
                                 'my_dsc_file'])
        self.failUnless(os.path.isdir(binary_dir_name))

    def test_build_with_bindmounts(self):
        """Tests the PBuilder.build method with the bindmounts parameter"""
        binary_dir_name = self.temp_file_name("binary")
        if os.path.exists(binary_dir_name):
            os.rmdir(binary_dir_name)
        # sanity check: the binary directory must not exist yet.
        self.failIf(os.path.exists(binary_dir_name))

        logfilename = self.temp_file_name("the_logfile")

        builder = PBuilder("my_pbuilderrc", self.root_command)
        builder.build("my_dsc_file", binary_dir_name, logfilename,
                      bindmounts=["/home/builder/tracks",
                                  "/home/builder/pbuilder"])
        self.check_command_line(['/usr/sbin/pbuilder', 'build',
                                 '--configfile', 'my_pbuilderrc',
                                 '--logfile', logfilename,
                                 '--buildresult', binary_dir_name,
                                 '--bindmounts', "/home/builder/tracks",
                                 '--bindmounts', "/home/builder/pbuilder",
                                 '--debbuildopts', '-b',
                                 'my_dsc_file'])
        self.failUnless(os.path.isdir(binary_dir_name))

    def test_build_with_extra_packages(self):
        """Tests the PBuilder.build method with the extra_packages parameter"""
        binary_dir_name = self.temp_file_name("binary")
        if os.path.exists(binary_dir_name):
            os.rmdir(binary_dir_name)
        # sanity check: the binary directory must not exist yet.
        self.failIf(os.path.exists(binary_dir_name))

        logfilename = self.temp_file_name("the_logfile")

        builder = PBuilder("my_pbuilderrc", self.root_command)
        builder.build("my_dsc_file", binary_dir_name, logfilename,
                      extra_packages=["subversion", "texinfo"])
        self.check_command_line(['/usr/sbin/pbuilder', 'build',
                                 '--configfile', 'my_pbuilderrc',
                                 '--logfile', logfilename,
                                 '--buildresult', binary_dir_name,
                                 '--extrapackages', "subversion",
                                 '--extrapackages', "texinfo",
                                 '--debbuildopts', '-b',
                                 'my_dsc_file'])
        self.failUnless(os.path.isdir(binary_dir_name))

    def test_build_with_extra_env(self):
        """Tests the PBuilder.build method with the extra_env parameter"""
        binary_dir_name = self.temp_file_name("binary")
        if os.path.exists(binary_dir_name):
            os.rmdir(binary_dir_name)
        env_test_file = self.temp_file_name("envtest")
        # sanity check: the binary directory must not exist yet.
        self.failIf(os.path.exists(binary_dir_name))
        # sanity check: the environment variable TREEPKG_TEST must not
        # be set yet
        self.failIf("TREEPKG_TEST" in os.environ)

        logfilename = self.temp_file_name("the_logfile")

        builder = PBuilder("my_pbuilderrc", self.root_command)
        builder.build("my_dsc_file", binary_dir_name, logfilename,
                      extra_env=dict(TREEPKG_TEST=env_test_file))
        self.check_command_line(['/usr/sbin/pbuilder', 'build',
                                 '--configfile', 'my_pbuilderrc',
                                 '--logfile', logfilename,
                                 '--buildresult', binary_dir_name,
                                 '--debbuildopts', '-b',
                                 'my_dsc_file'])
        self.failUnless(os.path.isdir(binary_dir_name))
        self.failUnless(os.path.exists(env_test_file))

    def test_run_script(self):
        logfilename = self.temp_file_name("the_logfile")
        builder = PBuilder("my_pbuilderrc", self.root_command)
        builder.run_script(["my_script"], logfile=logfilename)
        self.check_command_line(['/usr/sbin/pbuilder', 'execute',
                                 '--configfile', 'my_pbuilderrc',
                                 '--logfile', logfilename, '--',
                                 'my_script'])

    def test_run_script_with_arguments(self):
        logfilename = self.temp_file_name("the_logfile")
        builder = PBuilder("my_pbuilderrc", self.root_command)
        builder.run_script(["my_script", "--verbose"], logfile=logfilename)
        self.check_command_line(['/usr/sbin/pbuilder', 'execute',
                                 '--configfile', 'my_pbuilderrc',
                                 '--logfile', logfilename, '--',
                                 'my_script', '--verbose'])

    def test_run_script_with_bindmounts(self):
        logfilename = self.temp_file_name("the_logfile")
        builder = PBuilder("my_pbuilderrc", self.root_command)
        builder.run_script(["my_script"], logfile=logfilename,
                           bindmounts=("/home/builder/foo",
                                       "/home/builder/treepkg"))
        self.check_command_line(['/usr/sbin/pbuilder', 'execute',
                                 '--configfile', 'my_pbuilderrc',
                                 '--logfile', logfilename,
                                 '--bindmounts', '/home/builder/foo',
                                 '--bindmounts', '/home/builder/treepkg',
                                 '--', 'my_script'])

    def test_run_script_save_after_exec(self):
        logfilename = self.temp_file_name("the_logfile")
        builder = PBuilder("my_pbuilderrc", self.root_command)
        builder.run_script(["my_script", "--verbose"], logfilename,
                           save_after_exec=True)
        self.check_command_line(['/usr/sbin/pbuilder', 'execute',
                                 '--configfile', 'my_pbuilderrc',
                                 '--logfile', logfilename,
                                 '--save-after-exec', '--',
                                 'my_script', '--verbose'])


class TestPBuilderWithBinaryPackage(PBuilderTests):

    minimal_package = [
        ("debian",
         [("control", """\
Source: minimal
Section: utils
Priority: optional
Maintainer: Bernhard Herzog <bh@intevation.de>
Standards-Version: 3.7.2.2
Build-Depends: debhelper

Package: minimal
Architecture: any
Depends: ${shlibs:Depends}
Description: Minimal package for test purposes
"""),
          ("rules", 0755, """\
#!/usr/bin/make -f

build: build-stamp
build-stamp:
	dh_testdir
	touch build-stamp

clean:
	dh_testdir
	dh_testroot
	rm -f build-stamp
	dh_clean

# Build architecture-dependent files here.
binary-arch:
	dh_testdir
	dh_testroot
	dh_installdocs README
	dh_installchangelogs
	dh_fixperms
	dh_installdeb
	dh_gencontrol
	dh_md5sums
	dh_builddeb

binary: binary-arch
.PHONY: build build-stamp clean binary-arch binary
"""),
          ("changelog", """\
minimal (1.0-1) unstable; urgency=low

  * Newly packaged

 -- Bernhard Herzog <bh@intevation.de>  Wed, 21 May 2008 16:10:29 +0200
""")]),
        ("README", """\
This is a minimal debian package for test purposes
"""),
        ]

    pbuilder_files = [("pbuilderrc", ""),
                      ("extra-pkg", [])]

    def setUp(self):
        PBuilderTests.setUp(self)
        self.temp_base_dir = self.create_temp_dir("pbuilder")
        self.minimal_packge_dir = os.path.join(self.temp_base_dir,
                                               "minimal-1.0")
        self.create_files(self.minimal_packge_dir, self.minimal_package)
        call(["dpkg-buildpackage", "-rfakeroot", "-b", "-uc"],
             cwd=self.minimal_packge_dir, suppress_output=True)
        self.minimal_package_deb = os.path.join(self.temp_base_dir,
                                                "minimal_1.0-1_i386.deb")
        self.pbuilder_basedir = os.path.join(self.temp_base_dir, "pbuilder")
        self.create_files(self.pbuilder_basedir, self.pbuilder_files)
        self.extra_pkg_dir = os.path.join(self.pbuilder_basedir, "extra-pkg")
        self.pbuilderrc = os.path.join(self.pbuilder_basedir, "pbuilderrc")

    def test_add_binaries_to_extra_pkg(self):
        """Tests the PBuilder.add_binaries_to_extra_pkg method"""
        builder = PBuilder(self.pbuilderrc, self.root_command)
        # sanity check: the extra-pkg directory should be empty now
        self.assertEquals(os.listdir(self.extra_pkg_dir), [])

        builder.add_binaries_to_extra_pkg([self.minimal_package_deb])

        self.assertEquals(sorted(os.listdir(self.extra_pkg_dir)),
                          ["Packages", "Release", "auto"])
        self.assertEquals(sorted(os.listdir(os.path.join(self.extra_pkg_dir,
                                                         "auto"))),
                          ["minimal_1.0-1_i386.deb"])
        self.check_command_line(['/usr/sbin/pbuilder', 'update',
                                 '--configfile', self.pbuilderrc])