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authorTanaka Akira <akr@users.sourceforge.net>2000-02-11 19:46:46 +0000
committerTanaka Akira <akr@users.sourceforge.net>2000-02-11 19:46:46 +0000
commit23cf2d0f7fec8808f429d260ee3e2831fcdef801 (patch)
treeb3a2fc195e3f3a92e7fd257ea9d0835548c5b8c8
parenteaf9da50bc74c7160831b1397c5cbfffc12aa065 (diff)
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Initial revision
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+# $Id: is-at-least,v 1.1 2000/02/11 19:46:46 akr Exp $ -*- shell-script -*-
+#
+# 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 $MACHTYPE && echo 'You could be running Mandrake!'
+
+function is-at-least()
+{
+ emulate zsh ; setopt LOCAL_OPTIONS
+ local IFS=".-" min_cnt=0 ver_cnt=0 part min_ver version
+ min_ver=(${=1})
+ version=(${=2:-$ZSH_VERSION} 0)
+ while (( $min_cnt <= ${#min_ver} )) {
+ while [[ "$part" != <-> ]] {
+ [[ $[++ver_cnt] > ${#version} ]] && return 0
+ part=${version[ver_cnt]##*[^0-9]}
+ }
+ [[ $[++min_cnt] > ${#min_ver} ]] && return 0
+ (( part > min_ver[min_cnt] )) && return 0
+ (( part < min_ver[min_cnt] )) && return 1
+ part=''
+ }
+}