comparison mercurial/branchmap.py @ 23819:6bf93440a717

branchmap: add seek() to end of file before calling tell() on append open()

This is similar to 48c232873a54, which was subsequently modified in 19f5dec2d61f
for 2.4.  Unexpected test changes on Windows occurred without this.

23818:45c95e2f99ad

        """Save branch cache if it is dirty."""
        if self._rbcnamescount < len(self._names):
            try:
                if self._rbcnamescount != 0:
                    f = repo.vfs.open(_rbcnames, 'ab')
                    if f.tell() == self._rbcsnameslen:
                        f.write('\0')
                    else:
                        f.close()
                        self._rbcnamescount = 0

        if start != len(self._rbcrevs):
            self._rbcrevslen = min(len(repo.changelog),
                                   len(self._rbcrevs) // _rbcrecsize)
            try:
                f = repo.vfs.open(_rbcrevs, 'ab')
                if f.tell() != start:
                    f.seek(start)
                    f.truncate()
                end = self._rbcrevslen * _rbcrecsize
                f.write(self._rbcrevs[start:end])

23819:6bf93440a717

        """Save branch cache if it is dirty."""
        if self._rbcnamescount < len(self._names):
            try:
                if self._rbcnamescount != 0:
                    f = repo.vfs.open(_rbcnames, 'ab')
                    # The position after open(x, 'a') is implementation defined-
                    # see issue3543.  SEEK_END was added in 2.5
                    f.seek(0, 2) #os.SEEK_END
                    if f.tell() == self._rbcsnameslen:
                        f.write('\0')
                    else:
                        f.close()
                        self._rbcnamescount = 0

        if start != len(self._rbcrevs):
            self._rbcrevslen = min(len(repo.changelog),
                                   len(self._rbcrevs) // _rbcrecsize)
            try:
                f = repo.vfs.open(_rbcrevs, 'ab')
                # The position after open(x, 'a') is implementation defined-
                # see issue3543.  SEEK_END was added in 2.5
                f.seek(0, 2) #os.SEEK_END
                if f.tell() != start:
                    f.seek(start)
                    f.truncate()
                end = self._rbcrevslen * _rbcrecsize
                f.write(self._rbcrevs[start:end])