Thanks. I actually decided to go ahead and build from source. It's a good excuse to get the latest stable version and avoids permissions issues when adding optional components --- I can install in a directory owned by a normal user.
Perhaps in future, optional packages could be made available via the distribution package manager? I think this is how TeX Live works on Debian/Ubuntu. There are a number of packages which group together optional TeX Live components, such as fonts. On Tuesday, 13 November 2018 16:54:07 UTC, Dima Pasechnik wrote: > > > > On Tue, 13 Nov 2018 at 11:31, James Womack <james.c...@gmail.com > <javascript:>> wrote: > >> Thank you. I suspect you are right. >> >> I am right to think that installing packages in this way requires that I >> have compiled Sage Math from source? In that case, I may need to switch >> from the binary version in the Ubuntu repositories back to compiling from >> source. >> > > in theory you could do it with a binary install, in practice it might be > broken. > Try and see if sage -i fricas works. > > James >> >> On Tuesday, 13 November 2018 16:07:07 UTC, John H Palmieri wrote: >>> >>> FriCAS is an optional Sage package, so it is not automatically >>> installed. If you have built from source, you can easily install it (with >>> "sage -i fricas"), and maybe that's what you did before. >>> >>> John >>> >>> >>> On Tuesday, November 13, 2018 at 7:22:49 AM UTC-8, James Womack wrote: >>>> >>>> I am using Sage Math installed from the Ubuntu 18.04 LTS repositories ( >>>> https://packages.ubuntu.com/search?keywords=sagemath). >>>> >>>> I was previously using Sage Math v8.1 installed from source, but when I >>>> upgraded to 18.04 LTS opted for the easier to install and update package. >>>> >>>> I'm a bit puzzled because (I think) my previous installation from >>>> source was packaged with FriCAS, but the version from the Ubuntu >>>> repositories does not seem to be packaged with this. >>>> >>>> When I try to use the FriCAS interface in the version of Sage Math >>>> installed from the repositories, the following exception occurs: >>>> >>>> ---------------------------------------------------------------------------TypeError >>>> Traceback (most recent call >>>> last)<ipython-input-1-3651dd5de2cf> in <module>()----> 1 fricas('3 * 5') >>>> /usr/lib/python2.7/dist-packages/sage/interfaces/interface.pyc in >>>> __call__(self, x, name) 280 281 if isinstance(x, >>>> string_types):--> 282 return cls(self, x, name=name) 283 >>>> try: 284 return self._coerce_from_special_method(x) >>>> /usr/lib/python2.7/dist-packages/sage/interfaces/expect.pyc in >>>> __init__(self, parent, value, is_name, name) 1386 except >>>> (RuntimeError, ValueError) as x: 1387 >>>> self._session_number = -1-> 1388 raise_(TypeError, x, >>>> sys.exc_info()[2]) 1389 except BaseException: 1390 >>>> self._session_number = -1 >>>> /usr/lib/python2.7/dist-packages/sage/interfaces/expect.pyc in >>>> __init__(self, parent, value, is_name, name) 1381 else: 1382 >>>> try:-> 1383 self._name = parent._create(value, >>>> name=name) 1384 # Convert ValueError and RuntimeError to >>>> TypeError for 1385 # coercion to work properly. >>>> /usr/lib/python2.7/dist-packages/sage/interfaces/interface.pyc in >>>> _create(self, value, name) 476 def _create(self, value, name=None): >>>> 477 name = self._next_var_name() if name is None else name--> >>>> 478 self.set(name, value) 479 return name 480 >>>> /usr/lib/python2.7/dist-packages/sage/interfaces/fricas.pyc in set(self, >>>> var, value) 530 """ 531 cmd = >>>> '%s%s%s;'%(var,self._assign_symbol(), value)--> 532 output = >>>> self.eval(cmd, reformat=False) 533 self._check_errors(value, >>>> output) 534 >>>> /usr/lib/python2.7/dist-packages/sage/interfaces/fricas.pyc in eval(self, >>>> code, strip, synchronize, locals, allow_use_file, split_lines, reformat, >>>> **kwds) 752 synchronize=synchronize, >>>> locals=locals, 753 >>>> allow_use_file=allow_use_file, split_lines=split_lines,--> 754 >>>> **kwds) 755 # we remove carriage returns (\r) >>>> to make parsing easier 756 # they are sent depending on how >>>> fricas was invoked: >>>> /usr/lib/python2.7/dist-packages/sage/interfaces/expect.pyc in eval(self, >>>> code, strip, synchronize, locals, allow_use_file, split_lines, **kwds) >>>> 1295 elif split_lines: 1296 return >>>> '\n'.join([self._eval_line(L, allow_use_file=allow_use_file, **kwds)-> >>>> 1297 for L in code.split('\n') if >>>> L != '']) 1298 else: 1299 return >>>> self._eval_line(code, allow_use_file=allow_use_file, **kwds) >>>> /usr/lib/python2.7/dist-packages/sage/interfaces/expect.pyc in >>>> _eval_line(self, line, allow_use_file, wait_for_prompt, restart_if_needed) >>>> 905 try: 906 if self._expect is None:--> 907 >>>> self._start() 908 E = self._expect 909 >>>> try: >>>> /usr/lib/python2.7/dist-packages/sage/interfaces/fricas.pyc in >>>> _start(self) 281 # setting the prompt properly is necessary for >>>> restarting FriCAS 282 self._prompt = FRICAS_FIRST_PROMPT--> 283 >>>> Expect._start(self) 284 for line in FRICAS_INIT_CODE: >>>> 285 self.eval(line, reformat=False) >>>> /usr/lib/python2.7/dist-packages/sage/interfaces/expect.pyc in >>>> _start(self, alt_message, block_during_init) 489 # >>>> Change pexpect errors to RuntimeError 490 raise >>>> RuntimeError("unable to start %s because the command %r failed: %s\n%s" >>>> %--> 491 (self.name(), cmd, e, >>>> self._install_hints())) 492 except BaseException: 493 >>>> self._expect = None >>>> TypeError: unable to start fricas because the command 'fricas -nosman' >>>> failed: The command was not found or was not executable: fricas. >>>> Unfortunately I do not have my previous from-source installation to hand >>>> to test this with. >>>> >>>> Should FriCAS be packaged with Sage Math v8.1? 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