doc/bugs/check_for_curl_in_configure.hs.mdwn

@@ -0,0 +1,39 @@
+I thought this might be useful, since curl is being used for the URL backend, it might be worth checking for it's existence.
+
+<pre>
+diff --git a/configure.hs b/configure.hs
+index 772ba54..1a563e0 100644
+--- a/configure.hs
++++ b/configure.hs
+@@ -13,6 +13,7 @@ tests = [
+        , TestCase "uuid generator" $ selectCmd "uuid" ["uuid", "uuidgen"]
+        , TestCase "xargs -0" $ requireCmd "xargs_0" "xargs -0 </dev/null"
+        , TestCase "rsync" $ requireCmd "rsync" "rsync --version >/dev/null"
++       , TestCase "curl" $ requireCmd "curl" "curl --version >/dev/null"
+        , TestCase "unicode FilePath support" $ unicodeFilePath
+        ] ++ shaTestCases [1, 256, 512, 224, 384]
+</pre>
+
+also in Backend/URL.hs is it worth making a minor change to the way curl is called (I'm not sure if the following is correct or not)
+
+<pre>
+diff --git a/Backend/URL.hs b/Backend/URL.hs
+index 29dc8fe..4afcf86 100644
+--- a/Backend/URL.hs
++++ b/Backend/URL.hs
+@@ -50,10 +50,13 @@ dummyFsck _ _ _ = return True
+ dummyOk :: Key -> Annex Bool
+ dummyOk _ = return True
+ 
++curl :: [CommandParam] -> IO Bool
++curl = boolSystem "curl"
++
+ downloadUrl :: Key -> FilePath -> Annex Bool
+ downloadUrl key file = do
+        showNote "downloading"
+        showProgress -- make way for curl progress bar
+-       liftIO $ boolSystem "curl" [Params "-# -o", File file, File url]
++       liftIO $ curl [Params "-# -o", File file, File url]
+        where
+                url = join ":" $ drop 1 $ split ":" $ show key 
+</pre>