On 2019-08-09 13:31, Thomas Wolff wrote:
> Am 09.08.2019 um 20:56 schrieb Achim Gratz:
>> Jon Turney writes:
>>> This gets a GTG from me.
>>> I believe that according to our stated procedures additional approvals
>>> are required, because this package is unique to cygwin.
>> I'm not sure I remember correctly from when the discussion went on the
>> first time, but wasn't there some mumbling about this partly going into
>> groff? If that's still the case, remind me what this would entail and
>> I'll look into it.
> There are multiple ways of activating the feature (also described in the man
> page).
> The previous strategy placed a shell script wrapper "groff" aside groff, so
> the
> groff script and groff.exe would coexist in /bin. This was tricky to install
> and
> particularly it reportedly did not survive a package update of groff.
> The new approach does not use this wrapper anymore. Instead it redirects nroff
> to the package-supplied iroff script by configuration in /etc/man_db.conf.
There's also use of the undocumented LESS_TERMCAP_... with GROFF_NO_SGR env vars
(see attached - must be sourced from profile or rc) to remap bold, underline,
etc. into italic and/or colour, or whatever else you want to change, in all less
output.
--
Take care. Thanks, Brian Inglis, Calgary, Alberta, Canada
This email may be disturbing to some readers as it contains
too much technical detail. Reader discretion is advised.
#|/bin/sh
# .LESS_TERMCAP - set termcap properties for man and other less paging
# What things in a manpage use which capabilities?
# man and less use:
# bold for headings, command synopses, and code font
# underline for proper names (for example, “termcap” and “terminfo” in the
# termcap manpage), variable names (“name”, “bp”, “id”, etc.), and type names
# in some manpages (such as dispatch_queue_create(3))
# standout for the prompt at the bottom
# It doesn’t seem like anything uses blinking.
# termcap terminfo
#LESS_TERMCAP_ks=$(tput smkx) # ks smkx make the keypad send commands
#LESS_TERMCAP_ke=$(tput rmkx) # ke rmkx make the keypad send digits
#LESS_TERMCAP_vb=$(tput flash) # vb flash emit visual bell
#LESS_TERMCAP_mb=$(tput blink) # mb blink start blink
#LESS_TERMCAP_md=$(tput bold) # md bold start bold
LESS_TERMCAP_md=$(tput bold)$(tput setaf 4) # md bold set mode bold
4 set colour blue
#LESS_TERMCAP_mh=$(tput dim) # mh dim mode half-bright
#LESS_TERMCAP_mr=$(tput rev) # mr rev mode reverse video
#LESS_TERMCAP_me=$(tput sgr0) # me sgr0 reset attributes
#LESS_TERMCAP_so=$(tput smso) # so smso start standout (reverse video)
#LESS_TERMCAP_se=$(tput rmso) # se rmso stop standout
#LESS_TERMCAP_us=$(tput smul) # us smul start underline
LESS_TERMCAP_us=$(tput sitm)$(tput setaf 6) # us smul start underline
#LESS_TERMCAP_ue=$(tput rmul) # ue rmul stop underline
LESS_TERMCAP_ue=$(tput ritm)$(tput sgr0) # ue rmul stop underline
#LESS_TERMCAP_ZN=$(tput ssubm) # ZN ssubm set subscript mode
#LESS_TERMCAP_ZV=$(tput rsubm) # ZV rsubm reset subscript mode
#LESS_TERMCAP_ZO=$(tput ssupm) # ZO ssupm set superscript mode
#LESS_TERMCAP_ZW=$(tput rsupm) # ZW rsupm reset superscript mode
#LESS_TERMCAP_ZH=$(tput sitm) # ZH sitm set italic mode
#LESS_TERMCAP_ZR=$(tput ritm) # ZR ritm reset italic mode
#GROFF_NO_SGR=1 # for terminals
export \
LESS_TERMCAP_us LESS_TERMCAP_ue \
LESS_TERMCAP_md
# LESS_TERMCAP_mb LESS_TERMCAP_md \
# LESS_TERMCAP_mr LESS_TERMCAP_mh \
# LESS_TERMCAP_me \
# LESS_TERMCAP_so LESS_TERMCAP_se \
# LESS_TERMCAP_ZN LESS_TERMCAP_ZV \
# LESS_TERMCAP_ZO LESS_TERMCAP_ZW \
# GROFF_NO_SGR
