Initial move of common python bits into modules of the 'oe' python package

Signed-off-by: Chris Larson <chris_larson@mentor.com>

1 files changed, 407 insertions, 0 deletions

diff --git a/lib/oe/patch.py b/lib/oe/patch.py
new file mode 100644
index 0000000000..54c12bac2a
--- /dev/null
+++ b/lib/oe/patch.py
@@ -0,0 +1,407 @@
+class NotFoundError(Exception):
+    def __init__(self, path):
+        self.path = path
+
+    def __str__(self):
+        return "Error: %s not found." % self.path
+
+class CmdError(Exception):
+    def __init__(self, exitstatus, output):
+        self.status = exitstatus
+        self.output = output
+
+    def __str__(self):
+        return "Command Error: exit status: %d  Output:\n%s" % (self.status, self.output)
+
+
+def runcmd(args, dir = None):
+    import commands
+
+    if dir:
+        olddir = os.path.abspath(os.curdir)
+        if not os.path.exists(dir):
+            raise NotFoundError(dir)
+        os.chdir(dir)
+        # print("cwd: %s -> %s" % (olddir, dir))
+
+    try:
+        args = [ commands.mkarg(str(arg)) for arg in args ]
+        cmd = " ".join(args)
+        # print("cmd: %s" % cmd)
+        (exitstatus, output) = commands.getstatusoutput(cmd)
+        if exitstatus != 0:
+            raise CmdError(exitstatus >> 8, output)
+        return output
+
+    finally:
+        if dir:
+            os.chdir(olddir)
+
+class PatchError(Exception):
+    def __init__(self, msg):
+        self.msg = msg
+
+    def __str__(self):
+        return "Patch Error: %s" % self.msg
+
+class PatchSet(object):
+    defaults = {
+        "strippath": 1
+    }
+
+    def __init__(self, dir, d):
+        self.dir = dir
+        self.d = d
+        self.patches = []
+        self._current = None
+
+    def current(self):
+        return self._current
+
+    def Clean(self):
+        """
+        Clean out the patch set.  Generally includes unapplying all
+        patches and wiping out all associated metadata.
+        """
+        raise NotImplementedError()
+
+    def Import(self, patch, force):
+        if not patch.get("file"):
+            if not patch.get("remote"):
+                raise PatchError("Patch file must be specified in patch import.")
+            else:
+                patch["file"] = bb.fetch.localpath(patch["remote"], self.d)
+
+        for param in PatchSet.defaults:
+            if not patch.get(param):
+                patch[param] = PatchSet.defaults[param]
+
+        if patch.get("remote"):
+            patch["file"] = bb.data.expand(bb.fetch.localpath(patch["remote"], self.d), self.d)
+
+        patch["filemd5"] = bb.utils.md5_file(patch["file"])
+
+    def Push(self, force):
+        raise NotImplementedError()
+
+    def Pop(self, force):
+        raise NotImplementedError()
+
+    def Refresh(self, remote = None, all = None):
+        raise NotImplementedError()
+
+
+class PatchTree(PatchSet):
+    def __init__(self, dir, d):
+        PatchSet.__init__(self, dir, d)
+
+    def Import(self, patch, force = None):
+        """"""
+        PatchSet.Import(self, patch, force)
+
+        if self._current is not None:
+            i = self._current + 1
+        else:
+            i = 0
+        self.patches.insert(i, patch)
+
+    def _applypatch(self, patch, force = False, reverse = False, run = True):
+        shellcmd = ["cat", patch['file'], "|", "patch", "-p", patch['strippath']]
+        if reverse:
+            shellcmd.append('-R')
+
+        if not run:
+            return "sh" + "-c" + " ".join(shellcmd)
+
+        if not force:
+            shellcmd.append('--dry-run')
+
+        output = runcmd(["sh", "-c", " ".join(shellcmd)], self.dir)
+
+        if force:
+            return
+
+        shellcmd.pop(len(shellcmd) - 1)
+        output = runcmd(["sh", "-c", " ".join(shellcmd)], self.dir)
+        return output
+
+    def Push(self, force = False, all = False, run = True):
+        bb.note("self._current is %s" % self._current)
+        bb.note("patches is %s" % self.patches)
+        if all:
+            for i in self.patches:
+                if self._current is not None:
+                    self._current = self._current + 1
+                else:
+                    self._current = 0
+                bb.note("applying patch %s" % i)
+                self._applypatch(i, force)
+        else:
+            if self._current is not None:
+                self._current = self._current + 1
+            else:
+                self._current = 0
+            bb.note("applying patch %s" % self.patches[self._current])
+            return self._applypatch(self.patches[self._current], force)
+
+
+    def Pop(self, force = None, all = None):
+        if all:
+            for i in self.patches:
+                self._applypatch(i, force, True)
+        else:
+            self._applypatch(self.patches[self._current], force, True)
+
+    def Clean(self):
+        """"""
+
+class GitApplyTree(PatchTree):
+    def __init__(self, dir, d):
+        PatchTree.__init__(self, dir, d)
+
+    def _applypatch(self, patch, force = False, reverse = False, run = True):
+        shellcmd = ["git", "--git-dir=.", "apply", "-p%s" % patch['strippath']]
+
+        if reverse:
+            shellcmd.append('-R')
+
+        shellcmd.append(patch['file'])
+
+        if not run:
+            return "sh" + "-c" + " ".join(shellcmd)
+
+        return runcmd(["sh", "-c", " ".join(shellcmd)], self.dir)
+
+
+class QuiltTree(PatchSet):
+    def _runcmd(self, args, run = True):
+        quiltrc = bb.data.getVar('QUILTRCFILE', self.d, 1)
+        if not run:
+            return ["quilt"] + ["--quiltrc"] + [quiltrc] + args
+        runcmd(["quilt"] + ["--quiltrc"] + [quiltrc] + args, self.dir)
+
+    def _quiltpatchpath(self, file):
+        return os.path.join(self.dir, "patches", os.path.basename(file))
+
+
+    def __init__(self, dir, d):
+        PatchSet.__init__(self, dir, d)
+        self.initialized = False
+        p = os.path.join(self.dir, 'patches')
+        if not os.path.exists(p):
+            os.makedirs(p)
+
+    def Clean(self):
+        try:
+            self._runcmd(["pop", "-a", "-f"])
+        except Exception:
+            pass
+        self.initialized = True
+
+    def InitFromDir(self):
+        # read series -> self.patches
+        seriespath = os.path.join(self.dir, 'patches', 'series')
+        if not os.path.exists(self.dir):
+            raise Exception("Error: %s does not exist." % self.dir)
+        if os.path.exists(seriespath):
+            series = file(seriespath, 'r')
+            for line in series.readlines():
+                patch = {}
+                parts = line.strip().split()
+                patch["quiltfile"] = self._quiltpatchpath(parts[0])
+                patch["quiltfilemd5"] = bb.utils.md5_file(patch["quiltfile"])
+                if len(parts) > 1:
+                    patch["strippath"] = parts[1][2:]
+                self.patches.append(patch)
+            series.close()
+
+            # determine which patches are applied -> self._current
+            try:
+                output = runcmd(["quilt", "applied"], self.dir)
+            except CmdError:
+                import sys
+                if sys.exc_value.output.strip() == "No patches applied":
+                    return
+                else:
+                    raise sys.exc_value
+            output = [val for val in output.split('\n') if not val.startswith('#')]
+            for patch in self.patches:
+                if os.path.basename(patch["quiltfile"]) == output[-1]:
+                    self._current = self.patches.index(patch)
+        self.initialized = True
+
+    def Import(self, patch, force = None):
+        if not self.initialized:
+            self.InitFromDir()
+        PatchSet.Import(self, patch, force)
+
+        args = ["import", "-p", patch["strippath"]]
+        if force:
+            args.append("-f")
+            args.append("-dn")
+        args.append(patch["file"])
+
+        self._runcmd(args)
+
+        patch["quiltfile"] = self._quiltpatchpath(patch["file"])
+        patch["quiltfilemd5"] = bb.utils.md5_file(patch["quiltfile"])
+
+        # TODO: determine if the file being imported:
+        #      1) is already imported, and is the same
+        #      2) is already imported, but differs
+
+        self.patches.insert(self._current or 0, patch)
+
+
+    def Push(self, force = False, all = False, run = True):
+        # quilt push [-f]
+
+        args = ["push"]
+        if force:
+            args.append("-f")
+        if all:
+            args.append("-a")
+        if not run:
+            return self._runcmd(args, run)
+
+        self._runcmd(args)
+
+        if self._current is not None:
+            self._current = self._current + 1
+        else:
+            self._current = 0
+
+    def Pop(self, force = None, all = None):
+        # quilt pop [-f]
+        args = ["pop"]
+        if force:
+            args.append("-f")
+        if all:
+            args.append("-a")
+
+        self._runcmd(args)
+
+        if self._current == 0:
+            self._current = None
+
+        if self._current is not None:
+            self._current = self._current - 1
+
+    def Refresh(self, **kwargs):
+        if kwargs.get("remote"):
+            patch = self.patches[kwargs["patch"]]
+            if not patch:
+                raise PatchError("No patch found at index %s in patchset." % kwargs["patch"])
+            (type, host, path, user, pswd, parm) = bb.decodeurl(patch["remote"])
+            if type == "file":
+                import shutil
+                if not patch.get("file") and patch.get("remote"):
+                    patch["file"] = bb.fetch.localpath(patch["remote"], self.d)
+
+                shutil.copyfile(patch["quiltfile"], patch["file"])
+            else:
+                raise PatchError("Unable to do a remote refresh of %s, unsupported remote url scheme %s." % (os.path.basename(patch["quiltfile"]), type))
+        else:
+            # quilt refresh
+            args = ["refresh"]
+            if kwargs.get("quiltfile"):
+                args.append(os.path.basename(kwargs["quiltfile"]))
+            elif kwargs.get("patch"):
+                args.append(os.path.basename(self.patches[kwargs["patch"]]["quiltfile"]))
+            self._runcmd(args)
+
+class Resolver(object):
+    def __init__(self, patchset):
+        raise NotImplementedError()
+
+    def Resolve(self):
+        raise NotImplementedError()
+
+    def Revert(self):
+        raise NotImplementedError()
+
+    def Finalize(self):
+        raise NotImplementedError()
+
+class NOOPResolver(Resolver):
+    def __init__(self, patchset):
+        self.patchset = patchset
+
+    def Resolve(self):
+        olddir = os.path.abspath(os.curdir)
+        os.chdir(self.patchset.dir)
+        try:
+            self.patchset.Push()
+        except Exception:
+            import sys
+            os.chdir(olddir)
+            raise sys.exc_value
+
+# Patch resolver which relies on the user doing all the work involved in the
+# resolution, with the exception of refreshing the remote copy of the patch
+# files (the urls).
+class UserResolver(Resolver):
+    def __init__(self, patchset):
+        self.patchset = patchset
+
+    # Force a push in the patchset, then drop to a shell for the user to
+    # resolve any rejected hunks
+    def Resolve(self):
+
+        olddir = os.path.abspath(os.curdir)
+        os.chdir(self.patchset.dir)
+        try:
+            self.patchset.Push(False)
+        except CmdError, v:
+            # Patch application failed
+            patchcmd = self.patchset.Push(True, False, False)
+
+            t = bb.data.getVar('T', d, 1)
+            if not t:
+                bb.msg.fatal(bb.msg.domain.Build, "T not set")
+            bb.mkdirhier(t)
+            import random
+            rcfile = "%s/bashrc.%s.%s" % (t, str(os.getpid()), random.random())
+            f = open(rcfile, "w")
+            f.write("echo '*** Manual patch resolution mode ***'\n")
+            f.write("echo 'Dropping to a shell, so patch rejects can be fixed manually.'\n")
+            f.write("echo 'Run \"quilt refresh\" when patch is corrected, press CTRL+D to exit.'\n")
+            f.write("echo ''\n")
+            f.write(" ".join(patchcmd) + "\n")
+            f.write("#" + bb.data.getVar('TERMCMDRUN', d, 1))
+            f.close()
+            os.chmod(rcfile, 0775)
+
+            os.environ['TERMWINDOWTITLE'] = "Bitbake: Please fix patch rejects manually"
+            os.environ['TERMRCFILE'] = rcfile
+            rc = os.system(bb.data.getVar('TERMCMDRUN', d, 1))
+            if os.WIFEXITED(rc) and os.WEXITSTATUS(rc) != 0:
+                bb.msg.fatal(bb.msg.domain.Build, ("Cannot proceed with manual patch resolution - '%s' not found. " \
+                    + "Check TERMCMDRUN variable.") % bb.data.getVar('TERMCMDRUN', d, 1))
+
+            # Construct a new PatchSet after the user's changes, compare the
+            # sets, checking patches for modifications, and doing a remote
+            # refresh on each.
+            oldpatchset = self.patchset
+            self.patchset = oldpatchset.__class__(self.patchset.dir, self.patchset.d)
+
+            for patch in self.patchset.patches:
+                oldpatch = None
+                for opatch in oldpatchset.patches:
+                    if opatch["quiltfile"] == patch["quiltfile"]:
+                        oldpatch = opatch
+
+                if oldpatch:
+                    patch["remote"] = oldpatch["remote"]
+                    if patch["quiltfile"] == oldpatch["quiltfile"]:
+                        if patch["quiltfilemd5"] != oldpatch["quiltfilemd5"]:
+                            bb.note("Patch %s has changed, updating remote url %s" % (os.path.basename(patch["quiltfile"]), patch["remote"]))
+                            # user change?  remote refresh
+                            self.patchset.Refresh(remote=True, patch=self.patchset.patches.index(patch))
+                        else:
+                            # User did not fix the problem.  Abort.
+                            raise PatchError("Patch application failed, and user did not fix and refresh the patch.")
+        except Exception:
+            os.chdir(olddir)
+            raise
+        os.chdir(olddir)