From 22e9c1a4198554fa99b422e31bcef71e649459d0 Mon Sep 17 00:00:00 2001
From: Ian Jackson <ijackson@chiark.greenend.org.uk>
Date: Sat, 10 Oct 2020 19:13:36 +0100
Subject: [PATCH] wip wasm

Signed-off-by: Ian Jackson <ijackson@chiark.greenend.org.uk>
---
 Cargo.lock.example |  1 +
 Makefile           | 27 +++++++++++++++++++++------
 wasm/Cargo.toml    |  1 +
 wasm/wasm.rs       | 11 +++++++++++
 4 files changed, 34 insertions(+), 6 deletions(-)

diff --git a/Cargo.lock.example b/Cargo.lock.example
index ad78b5a6..19de0148 100644
--- a/Cargo.lock.example
+++ b/Cargo.lock.example
@@ -1127,6 +1127,7 @@ dependencies = [
 name = "otter-wasm"
 version = "0.0.1"
 dependencies = [
+ "fehler",
  "otter-zcoord",
  "wasm-bindgen",
 ]
diff --git a/Makefile b/Makefile
index d227d495..86f65be6 100644
--- a/Makefile
+++ b/Makefile
@@ -22,6 +22,9 @@ CARGO_TARGET_DIR ?= target
 USVG ?= usvg
 USVG_OPTIONS = "--sans-serif-family=DejaVu Sans"
 
+WASM_PACK ?= wasm-pack
+WASM_PACK_OPTIONS = --cargo-path=/bin/echo
+
 BUNDLE_SOURCES ?= bundle-rust-sources
 
 DEPLOY_ARCH=x86_64-unknown-linux-musl
@@ -58,6 +61,7 @@ endef
 
 $(eval $(call lp,BUNDLE_SOURCES,bundle-sources,debug,bundle-rust-sources))
 $(eval $(call lp,USVG,resvg,release,usvg))
+$(eval $(call lp,WASM_PACK,wasm-pack,debug,wasm-pack))
 
 #---------- variables defining bits of source etc. ----------
 
@@ -81,15 +85,26 @@ extra-release: bundled-sources
 
 #---------- cargo ----------
 
-CARGOES=$(foreach t, / /wasm-			, \
-	$(addprefix $t,				, \
-	check debug release))
+DR=debug release
+CARGOES=$(foreach t,/ /wasm-,$(addprefix $t,check $(DR)))
+
+X := $(shell echo >&2 PHONY $(addprefix cargo, $(CARGOES)))
 
 .PHONY: $(addprefix cargo, $(CARGOES))
 
-cargo/check cargo/debug:: cargo/%:; $(CARGO) test $(call cr,$*)
-cargo/wasm-%:; $(CARGO) -TWASM build -p otter-wasm $(call cr,$*)
-cargo/deploy-build: $(CARGO) -T$(DEPLOY_ARCH) build $(call cr,$(DEPLOY_RELEASE))
+$(addprefix cargo/,$(DR)):: cargo/%:
+	$(CARGO) test $(call cr,$*)
+
+$(addprefix cargo/wasm-,$(DR)):: cargo/wasm-%:
+	$(CARGO) -TWASM build -p otter-wasm $(call cr,$*)
+
+cargo/deploy-build:
+	$(CARGO) -T$(DEPLOY_ARCH) build $(call cr,$(DEPLOY_RELEASE))
+
+#---------- wasm ----------
+
+#WASM_ASSETS := $(addprefix otter_wasm,.js _bg.wasm)
+#WASM_OUTPUTS := $(addprefix otter_wasm,.d.ts 
 
 #---------- bundle-sources ----------
 
diff --git a/wasm/Cargo.toml b/wasm/Cargo.toml
index 715c03c6..e2f066e9 100644
--- a/wasm/Cargo.toml
+++ b/wasm/Cargo.toml
@@ -15,3 +15,4 @@ crate-type = ["cdylib"]
 [dependencies]
 otter-zcoord = { path = "../zcoord" }
 wasm-bindgen = "0.2"
+fehler = "1"
diff --git a/wasm/wasm.rs b/wasm/wasm.rs
index d6c22dc9..347ec4b3 100644
--- a/wasm/wasm.rs
+++ b/wasm/wasm.rs
@@ -1,5 +1,16 @@
 
 use wasm_bindgen::prelude::*;
+use fehler::throws;
+
+use zcoord::ZCoord;
 
 #[wasm_bindgen]
 pub struct ZCoordIterator (zcoord::Mutable);
+
+const X : &'static str = "invalid value passed to wasm";
+
+#[throws(JsValue)]
+#[wasm_bindgen]
+pub fn mutable(s: String) -> ZCoordIterator {
+  ZCoordIterator(ZCoord::from_str(&s).ok_or(X)?.clone_mut())
+}
-- 
2.30.2