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-rw-r--r--src/Hakyll/Core/Util/Parser.hs11
-rw-r--r--src/Hakyll/Web/Template/Internal.hs13
-rw-r--r--tests/Hakyll/Web/Template/Tests.hs7
3 files changed, 24 insertions, 7 deletions
diff --git a/src/Hakyll/Core/Util/Parser.hs b/src/Hakyll/Core/Util/Parser.hs
index e958b76..c4b2f8d 100644
--- a/src/Hakyll/Core/Util/Parser.hs
+++ b/src/Hakyll/Core/Util/Parser.hs
@@ -8,7 +8,7 @@ module Hakyll.Core.Util.Parser
--------------------------------------------------------------------------------
import Control.Applicative ((<|>))
-import Control.Monad (mzero)
+import Control.Monad (guard, mzero, void)
import qualified Text.Parsec as P
import Text.Parsec.String (Parser)
@@ -16,7 +16,14 @@ import Text.Parsec.String (Parser)
--------------------------------------------------------------------------------
metadataKey :: Parser String
metadataKey = do
- i <- (:) <$> P.letter <*> (P.many $ P.alphaNum <|> P.oneOf "_-.")
+ -- Ensure trailing '-' binds to '$' if present.
+ let hyphon = P.try $ do
+ void $ P.char '-'
+ x <- P.lookAhead P.anyChar
+ guard $ x /= '$'
+ pure '-'
+
+ i <- (:) <$> P.letter <*> P.many (P.alphaNum <|> P.oneOf "_." <|> hyphon)
if i `elem` reservedKeys then mzero else return i
diff --git a/src/Hakyll/Web/Template/Internal.hs b/src/Hakyll/Web/Template/Internal.hs
index 6ccad74..fce163f 100644
--- a/src/Hakyll/Web/Template/Internal.hs
+++ b/src/Hakyll/Web/Template/Internal.hs
@@ -143,7 +143,7 @@ template = mconcat <$> P.many (P.choice [ lift chunk
, conditional
, for
, partial
- , lift expr
+ , expr
])
where lift = fmap (Template . (:[]))
@@ -154,12 +154,15 @@ chunk = Chunk <$> P.many1 (P.noneOf "$")
--------------------------------------------------------------------------------
-expr :: P.Parser TemplateElement
+expr :: P.Parser Template
expr = P.try $ do
- void $ P.char '$'
+ trimLExpr <- trimOpen
e <- expr'
- void $ P.char '$'
- return $ Expr e
+ trimRExpr <- trimClose
+ return $ Template $ mconcat [ [TrimL | trimLExpr]
+ , [Expr e]
+ , [TrimR | trimRExpr]
+ ]
--------------------------------------------------------------------------------
diff --git a/tests/Hakyll/Web/Template/Tests.hs b/tests/Hakyll/Web/Template/Tests.hs
index 1ace2d4..a7b31a7 100644
--- a/tests/Hakyll/Web/Template/Tests.hs
+++ b/tests/Hakyll/Web/Template/Tests.hs
@@ -75,6 +75,13 @@ tests = testGroup "Hakyll.Core.Template.Tests" $ concat
, TrimR
]
@=? readTemplate "$-partial(\"path\")-$"
+ -- 'Expr' trim check.
+ , Template
+ [ TrimL
+ , Expr (Ident (TemplateKey "foo"))
+ , TrimR
+ ]
+ @=? readTemplate "$-foo-$"
]
]