Grc inside terminal (with different colors into terminal as a function of files size) not working on 10.14.6 Mojave and working on High Sierra 10.13.6

The size coloring function of the gcr ls command is still working with Mojave. You've changed the date format in the shell from month/day/(year)/time (US) to day/month/(year)/time (mostly Europe) though.

Now the day (1-31) will be colored with the default "size" color (black in my example and white in your example) as all sizes below 1M.

So either return to the US date format, or modify the respective regex expression(s) in conf.ls.

Proof:

US:

Europe:

To get different colors for smaller sizes (i.e. sizes below 1M) I added the following lines to grc's conf.ls file (the regular expressions below aren't really worked out properly - the alternative way to detect the size pattern (|\d(?:[,.]?\d+)?[K]) isn't correct, so don't just copy & paste them - but they work for the example screenshots:

# size: 10 <= size < 100
regexp=\s+(\d{2}|\d(?:[,.]?\d+)?[K])(?=\s[A-Z][a-z]{2}\s)
colours=bold yellow
=======
# size: 100 <= size < 1k
regexp=\s+(\d{3}|\d(?:[,.]?\d+)?[K])(?=\s[A-Z][a-z]{2}\s)
colours=red
=======
# size: 1k <= size < 10k
regexp=\s+(\d{4}|\d(?:[,.]?\d+)?[K])(?=\s[A-Z][a-z]{2}\s)
colours=bold red
=======
# size: 10k <= size < 100k
regexp=\s+(\d{5}|\d+(?:[,.]?\d+)?[K])(?=\s[A-Z][a-z]{2}\s)
colours=green
=======
# size: 100k <= size < 1M
regexp=\s+(\d{6}|\d+(?:[,.]?\d+)?[K])(?=\s[A-Z][a-z]{2}\s)
colours=bold green
=======
# size: 1M <= size < 10M
regexp=\s+(\d{7}|\d(?:[,.]?\d+)?[KM])(?=\s[A-Z][a-z]{2}\s)
colours=yellow
=======

The exemplary regular expression regexp=\s+(\d{5}|\d+(?:[,.]?\d+)?[K])(?=\s[A-Z][a-z]{2}\s) means the following:

1. \s+(\d{5}|\d+(?:[,.]?\d+)?[K]): search for a pattern with 1 or more non-printing characters, 5 digits (eg 34249) or 1 or more digits followed by an optional , or ., more optional digits and a K (e.g. 10K or 13.1K)

which must be followed by (?=...):

2. \s[A-Z][a-z]{2}\s which is the pattern for an abbreviated month surrounded by one non-printing character on each side(e.g. Oct )

With the european date format active the condition won't be fulfilled because the day (one or two digits) follows after the file size. Instead the day and month would meet the requirements, if a day had five digits.

Here is a conf.ls which should work with the all french locale in Mojave's terminal. I added some working date coloring because the (french) month apparently changed to all lowercase in Mojave. You can simply remove size coloring for smaller file sizes by deleting the respective lines or change colors if you don't like them.

# The following matches file sizes as produced by ls -l or ls -lh
# The output produced by ls -s is probably not specific
# enough to be reliably matched, especially considering ls -s(k|m|g|G).
#
# Example lines:
# -rw-r--r--   1 user staff 344M Mar 22 22:51 MVI_8735.m4v
# -rw-r--r--   1 user staff 360050327 Mar 22 22:51 MVI_8735.m4v
# -rw-r--r--.  1 user staff 1.0G Nov 23 16:13 testg
# -rw-r--r--.  1 user staff 1.0K Nov 23 16:13 testk
# -rw-r--r--.  1 user staff 1.0M Nov 23 16:13 testm
# -rw-r--r--.  1 user staff 1073741824 Nov 23 16:13 testg
# -rw-r--r--.  1 user staff       1024 Nov 23 16:13 testk
# -rw-r--r--.  1 user staff    1048576 Nov 23 16:13 testm
#
# The regexp uses lookahead to match a date following the size

# size: 10 <= size < 100
regexp=\s+(\d{2})(?=\s([ 1-3]\d)\s)
colours=bright_yellow
=======
# size: 100 <= size < 1k
regexp=\s+(\d{3})(?=\s([ 1-3]\d)\s)
colours=yellow
=======
# size: 1k <= size < 10k
regexp=\s+(\d{4}|\d(?:[,.]?\d+)?[K])(?=\s([ 1-3]\d)\s)
colours=bold yellow
=======
# size: 10k <= size < 100k
regexp=\s+(\d{5}|\d\d(?:[,.]?\d+)?[K])(?=\s([ 1-3]\d)\s)
colours=red
=======
# size: 100k <= size < 1M
regexp=\s+(\d{6}|\d\d\d(?:[,.]?\d+)?[K])(?=\s([ 1-3]\d)\s)
colours=bold red
=======
# size: 1M <= size < 10M
regexp=\s+(\d{7}|\d(?:[,.]?\d+)?[KM])(?=\s([ 1-3]\d)\s)
colours=green
=======
# size: 10M <= size < 100M
regexp=\s+(\d{8}|\d\d(?:[,.]?\d+)?M)(?=\s([ 1-3]\d)\s)
colours=bold green
=======
# size: 100M <= size < 1G
regexp=\s+(\d{9}|\d{3}M)(?=\s([ 1-3]\d)\s)
colours=blue
=======
# size: 1G <= size
regexp=\s+(\d{10,}|[\d.,]+G)(?=\s([ 1-3]\d)\s)
colours=bold blue
=======
# device major minor numbers
regexp=\s(\d+),\s+(\d+)\s
colours=default,bright_yellow ,yellow
=======
# Date-Time => G1=Day G2=Month G3=Hour G4=Minutes G5=Year
regexp=([ 1-3]\d)\s([a-z\u00FB]{3})\s(?:([0-2]?\d):([0-5]\d)(?=[\s,]|$)|\s*(\d{4}))
colours=unchanged,cyan,cyan,cyan,cyan,bold cyan
=======
# root
regexp=\s(root|wheel)(?=\s|$)
colours=unchanged,bold white on_red
=======
# SELinux
regexp=(\w+_u):(\w+_r):(\w+_t):(\w\d)
colours=default,green,yellow,cyan,magenta
-
# -rwxrwxrwx ============================
# File Type
regexp=(-|([bcCdDlMnpPs?]))(?=[-r][-w][-xsStT][-r][-w][-xsStT][-r][-w][-xsStT])
colours=unchanged,unchanged,bold white
-
# owner rwx
regexp=(?<=[-bcCdDlMnpPs?])(-|(r))(-|(w))(-|([xsStT]))(?=[-r][-w][-xsStT][-r][-w][-xsStT])
colours=unchanged,unchanged,bright_green,unchanged,bright_green,unchanged,bright_green
-
# group rwx
regexp=(?<=[-bcCdDlMnpPs?][-r][-w][-xsStT])(-|(r))(-|(w))(-|([xsStT]))(?=[-r][-w][-xsStT])
colours=unchanged,unchanged,yellow,unchanged,yellow,unchanged,yellow
-
# other rwx
regexp=(?<=[-bcCdDlMnpPs?][-r][-w][-xsStT][-r][-w][-xsStT])(-|(r))(-|(w))(-|([xsStT]))
colours=unchanged,unchanged,bright_red,unchanged,bright_red,unchanged,bright_red
-
# sStT all
regexp=(?<=[-bcCdDlMnpPs?])[-r][-w]([sStT])[-r][-w]([sStT])[-r][-w]([sStT])
colours=unchanged,bold green,bold yellow, bold red
-
# ACL
regexp=^\S{10}(\+)
colours=unchanged,on_cyan bold white

Example screenshot: