aboutsummaryrefslogtreecommitdiffstats
path: root/bitbake/lib/bb/fetch2/git.py
blob: 0abd67924bbd5ed8c2a5de821bf5a44ae29755aa (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
# ex:ts=4:sw=4:sts=4:et
# -*- tab-width: 4; c-basic-offset: 4; indent-tabs-mode: nil -*-
"""
BitBake 'Fetch' git implementation

git fetcher support the SRC_URI with format of:
SRC_URI = "git://some.host/somepath;OptionA=xxx;OptionB=xxx;..."

Supported SRC_URI options are:

- branch
   The git branch to retrieve from. The default is "master"

   This option also supports multiple branch fetching, with branches
   separated by commas.  In multiple branches case, the name option
   must have the same number of names to match the branches, which is
   used to specify the SRC_REV for the branch
   e.g:
   SRC_URI="git://some.host/somepath;branch=branchX,branchY;name=nameX,nameY"
   SRCREV_nameX = "xxxxxxxxxxxxxxxxxxxx"
   SRCREV_nameY = "YYYYYYYYYYYYYYYYYYYY"

- tag
    The git tag to retrieve. The default is "master"

- protocol
   The method to use to access the repository. Common options are "git",
   "http", "https", "file", "ssh" and "rsync". The default is "git".

- rebaseable
   rebaseable indicates that the upstream git repo may rebase in the future,
   and current revision may disappear from upstream repo. This option will
   remind fetcher to preserve local cache carefully for future use.
   The default value is "0", set rebaseable=1 for rebaseable git repo.

- nocheckout
   Don't checkout source code when unpacking. set this option for the recipe
   who has its own routine to checkout code.
   The default is "0", set nocheckout=1 if needed.

- bareclone
   Create a bare clone of the source code and don't checkout the source code
   when unpacking. Set this option for the recipe who has its own routine to
   checkout code and tracking branch requirements.
   The default is "0", set bareclone=1 if needed.

- nobranch
   Don't check the SHA validation for branch. set this option for the recipe
   referring to commit which is valid in tag instead of branch.
   The default is "0", set nobranch=1 if needed.

"""

#Copyright (C) 2005 Richard Purdie
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License version 2 as
# published by the Free Software Foundation.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License along
# with this program; if not, write to the Free Software Foundation, Inc.,
# 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.

import os
import re
import bb
from   bb    import data
from   bb.fetch2 import FetchMethod
from   bb.fetch2 import runfetchcmd
from   bb.fetch2 import logger

class Git(FetchMethod):
    """Class to fetch a module or modules from git repositories"""
    def init(self, d):
        pass

    def supports(self, ud, d):
        """
        Check to see if a given url can be fetched with git.
        """
        return ud.type in ['git']

    def supports_checksum(self, urldata):
        return False

    def urldata_init(self, ud, d):
        """
        init git specific variable within url data
        so that the git method like latest_revision() can work
        """
        if 'protocol' in ud.parm:
            ud.proto = ud.parm['protocol']
        elif not ud.host:
            ud.proto = 'file'
        else:
            ud.proto = "git"

        if not ud.proto in ('git', 'file', 'ssh', 'http', 'https', 'rsync'):
            raise bb.fetch2.ParameterError("Invalid protocol type", ud.url)

        ud.nocheckout = ud.parm.get("nocheckout","0") == "1"

        ud.rebaseable = ud.parm.get("rebaseable","0") == "1"

        ud.nobranch = ud.parm.get("nobranch","0") == "1"

        # bareclone implies nocheckout
        ud.bareclone = ud.parm.get("bareclone","0") == "1"
        if ud.bareclone:
            ud.nocheckout = 1
  
        ud.unresolvedrev = {}
        branches = ud.parm.get("branch", "master").split(',')
        if len(branches) != len(ud.names):
            raise bb.fetch2.ParameterError("The number of name and branch parameters is not balanced", ud.url)
        ud.branches = {}
        for name in ud.names:
            branch = branches[ud.names.index(name)]
            ud.branches[name] = branch
            ud.unresolvedrev[name] = branch

        ud.basecmd = data.getVar("FETCHCMD_git", d, True) or "git -c core.fsyncobjectfiles=0"

        ud.write_tarballs = ((data.getVar("BB_GENERATE_MIRROR_TARBALLS", d, True) or "0") != "0") or ud.rebaseable

        ud.setup_revisons(d)

        for name in ud.names:
            # Ensure anything that doesn't look like a sha256 checksum/revision is translated into one
            if not ud.revisions[name] or len(ud.revisions[name]) != 40  or (False in [c in "abcdef0123456789" for c in ud.revisions[name]]):
                if ud.revisions[name]:
                    ud.unresolvedrev[name] = ud.revisions[name]
                ud.revisions[name] = self.latest_revision(ud, d, name)

        gitsrcname = '%s%s' % (ud.host.replace(':','.'), ud.path.replace('/', '.').replace('*', '.'))
        # for rebaseable git repo, it is necessary to keep mirror tar ball
        # per revision, so that even the revision disappears from the
        # upstream repo in the future, the mirror will remain intact and still
        # contains the revision
        if ud.rebaseable:
            for name in ud.names:
                gitsrcname = gitsrcname + '_' + ud.revisions[name]
        ud.mirrortarball = 'git2_%s.tar.gz' % (gitsrcname)
        ud.fullmirror = os.path.join(d.getVar("DL_DIR", True), ud.mirrortarball)
        gitdir = d.getVar("GITDIR", True) or (d.getVar("DL_DIR", True) + "/git2/")
        ud.clonedir = os.path.join(gitdir, gitsrcname)

        ud.localfile = ud.clonedir

    def localpath(self, ud, d):
        return ud.clonedir

    def need_update(self, ud, d):
        if not os.path.exists(ud.clonedir):
            return True
        os.chdir(ud.clonedir)
        for name in ud.names:
            if not self._contains_ref(ud, d, name):
                return True
        if ud.write_tarballs and not os.path.exists(ud.fullmirror):
            return True
        return False

    def try_premirror(self, ud, d):
        # If we don't do this, updating an existing checkout with only premirrors
        # is not possible
        if d.getVar("BB_FETCH_PREMIRRORONLY", True) is not None:
            return True
        if os.path.exists(ud.clonedir):
            return False
        return True

    def download(self, ud, d):
        """Fetch url"""

        ud.repochanged = not os.path.exists(ud.fullmirror)

        # If the checkout doesn't exist and the mirror tarball does, extract it
        if not os.path.exists(ud.clonedir) and os.path.exists(ud.fullmirror):
            bb.utils.mkdirhier(ud.clonedir)
            os.chdir(ud.clonedir)
            runfetchcmd("tar -xzf %s" % (ud.fullmirror), d)

        repourl = self._get_repo_url(ud)

        # If the repo still doesn't exist, fallback to cloning it
        if not os.path.exists(ud.clonedir):
            # We do this since git will use a "-l" option automatically for local urls where possible
            if repourl.startswith("file://"):
                repourl = repourl[7:]
            clone_cmd = "%s clone --bare --mirror %s %s" % (ud.basecmd, repourl, ud.clonedir)
            if ud.proto.lower() != 'file':
                bb.fetch2.check_network_access(d, clone_cmd)
            runfetchcmd(clone_cmd, d)

        os.chdir(ud.clonedir)
        # Update the checkout if needed
        needupdate = False
        for name in ud.names:
            if not self._contains_ref(ud, d, name):
                needupdate = True
        if needupdate:
            try: 
                runfetchcmd("%s remote rm origin" % ud.basecmd, d) 
            except bb.fetch2.FetchError:
                logger.debug(1, "No Origin")

            runfetchcmd("%s remote add --mirror=fetch origin %s" % (ud.basecmd, repourl), d)
            fetch_cmd = "%s fetch -f --prune %s refs/*:refs/*" % (ud.basecmd, repourl)
            if ud.proto.lower() != 'file':
                bb.fetch2.check_network_access(d, fetch_cmd, ud.url)
            runfetchcmd(fetch_cmd, d)
            runfetchcmd("%s prune-packed" % ud.basecmd, d)
            runfetchcmd("%s pack-redundant --all | xargs -r rm" % ud.basecmd, d)
            ud.repochanged = True
        os.chdir(ud.clonedir)
        for name in ud.names:
            if not self._contains_ref(ud, d, name):
                raise bb.fetch2.FetchError("Unable to find revision %s in branch %s even from upstream" % (ud.revisions[name], ud.branches[name]))

    def build_mirror_data(self, ud, d):
        # Generate a mirror tarball if needed
        if ud.write_tarballs and (ud.repochanged or not os.path.exists(ud.fullmirror)):
            # it's possible that this symlink points to read-only filesystem with PREMIRROR
            if os.path.islink(ud.fullmirror):
                os.unlink(ud.fullmirror)

            os.chdir(ud.clonedir)
            logger.info("Creating tarball of git repository")
            runfetchcmd("tar -czf %s %s" % (ud.fullmirror, os.path.join(".") ), d)
            runfetchcmd("touch %s.done" % (ud.fullmirror), d)

    def unpack(self, ud, destdir, d):
        """ unpack the downloaded src to destdir"""

        subdir = ud.parm.get("subpath", "")
        if subdir != "":
            readpathspec = ":%s" % (subdir)
            def_destsuffix = "%s/" % os.path.basename(subdir.rstrip('/'))
        else:
            readpathspec = ""
            def_destsuffix = "git/"

        destsuffix = ud.parm.get("destsuffix", def_destsuffix)
        destdir = ud.destdir = os.path.join(destdir, destsuffix)
        if os.path.exists(destdir):
            bb.utils.prunedir(destdir)

        cloneflags = "-s -n"
        if ud.bareclone:
            cloneflags += " --mirror"

        # Versions of git prior to 1.7.9.2 have issues where foo.git and foo get confused
        # and you end up with some horrible union of the two when you attempt to clone it
        # The least invasive workaround seems to be a symlink to the real directory to
        # fool git into ignoring any .git version that may also be present.
        #
        # The issue is fixed in more recent versions of git so we can drop this hack in future
        # when that version becomes common enough.
        clonedir = ud.clonedir
        if not ud.path.endswith(".git"):
            indirectiondir = destdir[:-1] + ".indirectionsymlink"
            if os.path.exists(indirectiondir):
                os.remove(indirectiondir)
            bb.utils.mkdirhier(os.path.dirname(indirectiondir))
            os.symlink(ud.clonedir, indirectiondir)
            clonedir = indirectiondir

        runfetchcmd("%s clone %s %s/ %s" % (ud.basecmd, cloneflags, clonedir, destdir), d)
        os.chdir(destdir)
        repourl = self._get_repo_url(ud)
        runfetchcmd("%s remote set-url origin %s" % (ud.basecmd, repourl), d)
        if not ud.nocheckout:
            if subdir != "":
                runfetchcmd("%s read-tree %s%s" % (ud.basecmd, ud.revisions[ud.names[0]], readpathspec), d)
                runfetchcmd("%s checkout-index -q -f -a" % ud.basecmd, d)
            else:
                runfetchcmd("%s checkout %s" % (ud.basecmd, ud.revisions[ud.names[0]]), d)
        return True

    def clean(self, ud, d):
        """ clean the git directory """

        bb.utils.remove(ud.localpath, True)
        bb.utils.remove(ud.fullmirror)
        bb.utils.remove(ud.fullmirror + ".done")

    def supports_srcrev(self):
        return True

    def _contains_ref(self, ud, d, name):
        cmd = ""
        if ud.nobranch:
            cmd = "%s log --pretty=oneline -n 1 %s -- 2> /dev/null | wc -l" % (
                ud.basecmd, ud.revisions[name])
        else:
            cmd =  "%s branch --contains %s --list %s 2> /dev/null | wc -l" % (
                ud.basecmd, ud.revisions[name], ud.branches[name])
        try:
            output = runfetchcmd(cmd, d, quiet=True)
        except bb.fetch2.FetchError:
            return False
        if len(output.split()) > 1:
            raise bb.fetch2.FetchError("The command '%s' gave output with more then 1 line unexpectedly, output: '%s'" % (cmd, output))
        return output.split()[0] != "0"

    def _get_repo_url(self, ud):
        """
        Return the repository URL
        """
        if ud.user:
            username = ud.user + '@'
        else:
            username = ""
        return "%s://%s%s%s" % (ud.proto, username, ud.host, ud.path)

    def _revision_key(self, ud, d, name):
        """
        Return a unique key for the url
        """
        return "git:" + ud.host + ud.path.replace('/', '.') + ud.unresolvedrev[name]

    def _lsremote(self, ud, d, search):
        """
        Run git ls-remote with the specified search string
        """
        repourl = self._get_repo_url(ud)
        cmd = "%s ls-remote %s %s" % \
              (ud.basecmd, repourl, search)
        if ud.proto.lower() != 'file':
            bb.fetch2.check_network_access(d, cmd)
        output = runfetchcmd(cmd, d, True)
        if not output:
            raise bb.fetch2.FetchError("The command %s gave empty output unexpectedly" % cmd, ud.url)
        return output

    def _latest_revision(self, ud, d, name):
        """
        Compute the HEAD revision for the url
        """
        output = self._lsremote(ud, d, "")
        # Tags of the form ^{} may not work, need to fallback to other form
        if ud.unresolvedrev[name][:5] == "refs/":
            head = ud.unresolvedrev[name]
            tag = ud.unresolvedrev[name]
        else:
            head = "refs/heads/%s" % ud.unresolvedrev[name]
            tag = "refs/tags/%s" % ud.unresolvedrev[name]
        for s in [head, tag + "^{}", tag]:
            for l in output.split('\n'):
                if s in l:
                    return l.split()[0]
        raise bb.fetch2.FetchError("Unable to resolve '%s' in upstream git repository in git ls-remote output for %s" % \
            (ud.unresolvedrev[name], ud.host+ud.path))

    def latest_versionstring(self, ud, d):
        """
        Compute the latest release name like "x.y.x" in "x.y.x+gitHASH"
        by searching through the tags output of ls-remote, comparing
        versions and returning the highest match.
        """
        verstring = ""
        tagregex = re.compile(d.getVar('GITTAGREGEX', True) or "(?P<pver>([0-9][\.|_]?)+)")
        try:
            output = self._lsremote(ud, d, "refs/tags/*^{}")
        except bb.fetch2.FetchError or bb.fetch2.NetworkAccess:
            return ""

        for line in output.split("\n"):
            if not line:
                break

            line = line.split("/")[-1]
            # Ignore non-released branches
            m = re.search("(alpha|beta|rc|final)+", line)
            if m:
                continue

            # search for version in the line
            tag = tagregex.search(line)
            if tag == None:
                continue

            tag = tag.group('pver')
            tag = tag.replace("_", ".")

            if verstring and bb.utils.vercmp(("0", tag, ""), ("0", verstring, "")) < 0:
                continue
            verstring = tag

        return verstring

    def _build_revision(self, ud, d, name):
        return ud.revisions[name]

    def gitpkgv_revision(self, ud, d, name):
        """
        Return a sortable revision number by counting commits in the history
        Based on gitpkgv.bblass in meta-openembedded
        """
        rev = self._build_revision(ud, d, name)
        localpath = ud.localpath
        rev_file = os.path.join(localpath, "oe-gitpkgv_" + rev)
        if not os.path.exists(localpath):
            commits = None
        else:
            if not os.path.exists(rev_file) or not os.path.getsize(rev_file):
                from pipes import quote
                commits = bb.fetch2.runfetchcmd(
                        "git rev-list %s -- | wc -l" % (quote(rev)),
                        d, quiet=True).strip().lstrip('0')
                if commits:
                    open(rev_file, "w").write("%d\n" % int(commits))
            else:
                commits = open(rev_file, "r").readline(128).strip()
        if commits:
            return False, "%s+%s" % (commits, rev[:7])
        else:
            return True, str(rev)

    def checkstatus(self, fetch, ud, d):
        try:
            self._lsremote(ud, d, "")
            return True
        except FetchError:
            return False