feat: can pass content as flags

README.md

@@ -22,8 +22,8 @@ Next, we concatenate this with the Elm JavaScript output and an app launcher sni
 ## Limitations
 
 * No event loop
-* Hence, no [TEA](https://guide.elm-lang.org/architecture/); the `main` function must return a static view
-* Hence, no Time, no Random, no Json Encoder/Decoder (!), no Http
+* Hence, no [TEA](https://guide.elm-lang.org/architecture/); no `update` can be triggered
+* Hence, no Time, no Random, no Http
 * Nodes can only have one parent (this should always be the case)
 * Does not scale well : creating thousands of Nodes consumes a [lot of RAM](#Performances)
 
@@ -37,19 +37,73 @@ Next, we concatenate this with the Elm JavaScript output and an app launcher sni
 ```elm
 module Hello exposing(main)
 
-import Html exposing (p, text)
+import Html exposing (text)
 
-main = p [] [text "Hello World!"]
+main = text "Hello World!"
 ```
 
-4. Run `./build.sh src/Hello.elm`; this generates the corresponding HTML code:
+4. Run `./elmscript.sh src/Hello.elm`
 
-```html
-<p>
+This produces the expected output:
+
+```text
 Hello World!
-</p>
 ```
 
+## passing input
+
+Input content can be passed to the script via the standard input. The content is then passed to the Elm script as "flags". The script must then use `Browser.element` and implement `init flags` function.
+
+
+Create `src/Greet.elm` with the following content:
+
+```elm
+module Greet exposing (main)
+
+import Browser
+import Html exposing (text)
+
+
+main =
+  Browser.element
+    { init = \f -> (f, Cmd.none)
+    , update = \m _ -> (m, Cmd.none)
+    , view = \m -> text ("hello " ++ m)
+    , subscriptions = always Sub.none
+    }
+```
+
+Run `./elmscript.sh src/Greet.elm <<< 'Elm'`
+
+This produces the expected output:  `hello Elm`.
+
+
+I's even more natural when passing file :
+
+* run `elm install elm-explorations/markdown`
+* create `src/MdRender.elm` with the following content:
+
+```elm
+module MdRender exposing (main)
+
+import Browser
+import Html.Attributes exposing (class)
+import Markdown
+
+main =
+  Browser.element
+    { init = \s -> (s, Cmd.none)
+    , update = \m c -> (m, Cmd.none)
+    , view = \m -> Markdown.toHtml [class "content"] m
+    , subscriptions = always Sub.none
+    }
+
+```
+
+* run `./elmscript.sh src/MdRender.elm < README.md > README.html`
+
+
+
 ## Performances
 
 Acceptable for small scripts : 250ms on a modest x86_64 CPU and 64MB RAM for a 500 records into a table ; but is does not scale well as everything is loaded before processing ; no streaming contrary to the usual Unix way.