MINOR: config: add predicates "version_atleast" and "version_before" to cond blocks
These predicates respectively verify that the current version is at least
a given version or is before a specific one. The syntax is exactly the one
reported by "haproxy -v", though each component is optional, so both "1.5"
and "2.4-dev18-88910-48" are supported. Missing components equal zero, and
"dev" is below "pre" or "rc", which are both inferior to no such mention
(i.e. they are negative). Thus "2.4-dev18" is older than "2.4-rc1" which
is older than "2.4".
diff --git a/doc/configuration.txt b/doc/configuration.txt
index 5f60507..72c4680 100644
--- a/doc/configuration.txt
+++ b/doc/configuration.txt
@@ -821,6 +821,16 @@
- streq(<str1>,<str2>) : returns true only if the two strings are equal
- strneq(<str1>,<str2>) : returns true only if the two strings differ
+ - version_atleast(<ver>): returns true if the current haproxy version is
+ at least as recent as <ver> otherwise false. The
+ version syntax is the same as shown by "haproxy -v"
+ and missing components are assumed as being zero.
+
+ - version_before(<ver>) : returns true if the current haproxy version is
+ strictly older than <ver> otherwise false. The
+ version syntax is the same as shown by "haproxy -v"
+ and missing components are assumed as being zero.
+
Example:
.if defined(HAPROXY_MWORKER)
@@ -839,6 +849,10 @@
.endif
.endif
+ .if version_atleast(2.4-dev19)
+ profiling.memory on
+ .endif
+
Three other directives are provided to report some status:
- .notice "message" : emit this message at level NOTICE