I see. Indeed, there are other escape sequences that could sneak if if GAP tries to color its output.
The -E option looks like the key. I tested like this on my docker image: [root@f52defcaf0a7 sage-10.9]# local/bin/gap -r -q --bare --nointeract -c 'Display(JoinStringsWithSeparator(GAPInfo.RootPaths,";"));' > output [root@f52defcaf0a7 sage-10.9]# od -a output 0000000 esc [ ? 1 0 3 4 h / v a r / t m p 0000020 / s a g e - 1 0 . 9 / l o c a l 0000040 / l i b / g a p / ; / v a r / t 0000060 m p / s a g e - 1 0 . 9 / l o c 0000100 a l / s h a r e / g a p / nl 0000116 [root@f52defcaf0a7 sage-10.9]# local/bin/gap -E -r -q --bare --nointeract -c 'Display(JoinStringsWithSeparator(GAPInfo.RootPaths,";"));' > output [root@f52defcaf0a7 sage-10.9]# od -a output 0000000 / v a r / t m p / s a g e - 1 0 0000020 . 9 / l o c a l / l i b / g a p 0000040 / ; / v a r / t m p / s a g e - 0000060 1 0 . 9 / l o c a l / s h a r e 0000100 / g a p / nl 0000106 Note that using Print does not help with this issue, but is still probably a good idea to avoid other escape sequences: [root@f52defcaf0a7 sage-10.9]# local/bin/gap -r -q --bare --nointeract -c 'Print(JoinStringsWithSeparator(GAPInfo.RootPaths,";"), "\n");' > output [root@f52defcaf0a7 sage-10.9]# od -a output 0000000 esc [ ? 1 0 3 4 h / v a r / t m p 0000020 / s a g e - 1 0 . 9 / l o c a l 0000040 / l i b / g a p / ; / v a r / t 0000060 m p / s a g e - 1 0 . 9 / l o c 0000100 a l / s h a r e / g a p / nl 0000116 [root@f52defcaf0a7 sage-10.9]# local/bin/gap -E -r -q --bare --nointeract -c 'Print(JoinStringsWithSeparator(GAPInfo.RootPaths,";"), "\n");' > output [root@f52defcaf0a7 sage-10.9]# od -a output 0000000 / v a r / t m p / s a g e - 1 0 0000020 . 9 / l o c a l / l i b / g a p 0000040 / ; / v a r / t m p / s a g e - 0000060 1 0 . 9 / l o c a l / s h a r e 0000100 / g a p / nl 0000106 So the "belt and suspenders" solution to this problem is to use both -E and Print in both meson.build and gap/spkg-configure.m4. - Marc On Tue, Mar 3, 2026 at 11:42 AM Dima Pasechnik <[email protected]> wrote: > > > On Tue, Mar 3, 2026 at 11:06 AM Marc Culler <[email protected]> wrote: > >> Why do you think that disabling ColorPrompt would make a difference, if >> the escape sequence is being emitted by rl_initialize()? >> > > Well, just trying to be less "fancy-terminals"-bound. > As well, instead of Display(...) one should run Print(...,"\n"), as > Display might colour, format, etc. things, if allowed. > Or, even safer, use 'PrintTo("/tmp/foobar42.txt",..., "\n") and get the > needed values from "/tmp/foobar42". > (by right, these should be in a temp dir etc etc) > > But, perhaps much easier might be to add '-E' switch to these GAP calls. > '-E' means "disable readline (if possible)", > according to the output of "gap -h". (no idea what "if possible" means) > > Dima > > -- > You received this message because you are subscribed to a topic in the > Google Groups "sage-devel" group. > To unsubscribe from this topic, visit > https://groups.google.com/d/topic/sage-devel/dVVleHx0xP0/unsubscribe. > To unsubscribe from this group and all its topics, send an email to > [email protected]. > To view this discussion visit > https://groups.google.com/d/msgid/sage-devel/CAAWYfq0u5iCbyEZX15Tqos%3D40SehuS5%2BwV%3DM6DzSB-Gq4q_u6w%40mail.gmail.com > <https://groups.google.com/d/msgid/sage-devel/CAAWYfq0u5iCbyEZX15Tqos%3D40SehuS5%2BwV%3DM6DzSB-Gq4q_u6w%40mail.gmail.com?utm_medium=email&utm_source=footer> > . > -- You received this message because you are subscribed to the Google Groups "sage-devel" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To view this discussion visit https://groups.google.com/d/msgid/sage-devel/CALcZXRFF_eW99KkFLCAYwb_obDAmegwB%2BsaFaY7H%3DRVFeqp69w%40mail.gmail.com.
