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authorBoris Kolpackov <boris@codesynthesis.com>2020-07-06 10:22:12 +0200
committerBoris Kolpackov <boris@codesynthesis.com>2020-07-06 10:22:12 +0200
commit9a9276e1d151910ba31db4d91521b41e5ea1435f (patch)
treea4bf5d320c6c1c6f5d98e00a2620c2bb8a33fb3e /doc
parent736812cb586e0f80742337dce802ad24adf331ad (diff)
Adjust variable block applicability in dependency chains
Before the block used to apply to the set of prerequisites before the last `:`. This turned out to be counterintuitive and not very useful since prerequisite-specific variables are a lot less common than target specific. And it doesn't fit with ad hoc recipes. The new rule is if the chain ends with `:`, then the block applies to the last set of prerequisites. Otherwise, it applies to the last set of targets. For example: ./: exe{test}: cxx{main} { test = true # Applies to the exe{test} target. } ./: exe{test}: libue{test}: { bin.whole = false # Applies to the libue{test} prerequisite. } This is actually consistent with both non-chain and non-block cases. Consider: exe{test}: cxx{main} { test = true } exe{test}: libue{test}: { bin.whole = false } exe{test}: libue{test}: bin.whole = false The only exception we now have in this overall approach of "if the dependency declaration ends with a colon, then what follows is for a prerequisite" is for the first semicolon: exe{test}: { test = true } exe{test}: test = true But that's probably intuitive enough since there cannot be a prerequisite without a target.
Diffstat (limited to 'doc')
-rw-r--r--doc/manual.cli12
1 files changed, 9 insertions, 3 deletions
diff --git a/doc/manual.cli b/doc/manual.cli
index cf2ec3a..ba0aa63 100644
--- a/doc/manual.cli
+++ b/doc/manual.cli
@@ -3259,11 +3259,17 @@ h{config}: in{config}
}
\
-In case of a dependency chain, the block applies to the set of prerequisites
-(note: \i{not targets}) before last \c{:}. For example:
+In case of a dependency chain, if the chain ends with a colon (\c{:}), then
+the block applies to the last set of prerequisites. Otherwise, it applies to
+the last set of targets. For example:
\
-./: exe{test}: libue{test}: cxx{test}
+./: exe{test}: cxx{main}
+{
+ test = true # Applies to the exe{test} target.
+}
+
+./: exe{test}: libue{test}:
{
bin.whole = false # Applies to the libue{test} prerequisite.
}