mirror of
git://git.code.sf.net/p/zsh/code
synced 2024-11-19 21:44:11 +01:00
39 lines
1.4 KiB
Plaintext
39 lines
1.4 KiB
Plaintext
#
|
|
# Test whether $ZSH_VERSION (or some value of your choice, if a second argument
|
|
# is provided) is greater than or equal to x.y.z-r (in argument one). In fact,
|
|
# it'll accept any dot/dash-separated string of numbers as its second argument
|
|
# and compare it to the dot/dash-separated first argument. Leading non-number
|
|
# parts of a segment (such as the "zefram" in 3.1.2-zefram4) are not considered
|
|
# when the comparison is done; only the numbers matter. Any left-out segments
|
|
# in the first argument that are present in the version string compared are
|
|
# considered as zeroes, eg 3 == 3.0 == 3.0.0 == 3.0.0.0 and so on.
|
|
#
|
|
# Usage examples:
|
|
# is-at-least 3.1.6-15 && setopt NO_GLOBAL_RCS
|
|
# is-at-least 3.1.0 && setopt HIST_REDUCE_BLANKS
|
|
# is-at-least 586 $MACHTYPE && echo 'You could be running Mandrake!'
|
|
# is-at-least $ZSH_VERSION || print 'Something fishy here.'
|
|
|
|
emulate zsh ; setopt LOCAL_OPTIONS
|
|
|
|
local IFS=".-" min_cnt=0 ver_cnt=0 part min_ver version
|
|
|
|
min_ver=(${=1})
|
|
version=(${=2:-$ZSH_VERSION} 0)
|
|
|
|
while (( $min_cnt <= ${#min_ver} )); do
|
|
while [[ "$part" != <-> ]]; do
|
|
(( ++ver_cnt > ${#version} )) && return 0
|
|
part=${version[ver_cnt]##*[^0-9]}
|
|
done
|
|
|
|
while true; do
|
|
(( ++min_cnt > ${#min_ver} )) && return 0
|
|
[[ ${min_ver[min_cnt]} = <-> ]] && break
|
|
done
|
|
|
|
(( part > min_ver[min_cnt] )) && return 0
|
|
(( part < min_ver[min_cnt] )) && return 1
|
|
part=''
|
|
done
|