fix: add missing build.sh for Discord and WhatsApp channels (#429)

* fix: add missing build.sh for Discord and WhatsApp channels (#406)

Both channels had full source code in channels-src/ but no build.sh,
so their WASM binaries were never compiled and they didn't appear in
the setup wizard's channel selection list.

Modeled after the existing channels-src/telegram/build.sh.

Co-Authored-By: Claude Opus 4.6 <[email protected]>

* fix: guard wasm-tools availability in WASM build scripts

Add command existence check before invoking wasm-tools in discord
and whatsapp build scripts. Prints actionable error message if missing.

Addresses Gemini review feedback on PR #429.

Co-Authored-By: Claude Opus 4.6 <[email protected]>

---------

Co-authored-by: Claude Opus 4.6 <[email protected]>

channels-src/discord/build.sh

@@ -0,0 +1,48 @@
+#!/usr/bin/env bash
+# Build the Discord channel WASM component
+#
+# Prerequisites:
+#   - Rust with wasm32-wasip2 target: rustup target add wasm32-wasip2
+#   - wasm-tools for component creation: cargo install wasm-tools
+#
+# Output:
+#   - discord.wasm - WASM component ready for deployment
+#   - discord.capabilities.json - Capabilities file (copy alongside .wasm)
+
+set -euo pipefail
+
+cd "$(dirname "$0")"
+
+if ! command -v wasm-tools &> /dev/null; then
+    echo "Error: wasm-tools not found. Install with: cargo install wasm-tools"
+    exit 1
+fi
+
+echo "Building Discord channel WASM component..."
+
+# Build the WASM module
+cargo build --release --target wasm32-wasip2
+
+# Convert to component model (if not already a component)
+# wasm-tools component new is idempotent on components
+WASM_PATH="target/wasm32-wasip2/release/discord_channel.wasm"
+
+if [ -f "$WASM_PATH" ]; then
+    # Create component if needed
+    wasm-tools component new "$WASM_PATH" -o discord.wasm 2>/dev/null || cp "$WASM_PATH" discord.wasm
+
+    # Optimize the component
+    wasm-tools strip discord.wasm -o discord.wasm
+
+    echo "Built: discord.wasm ($(du -h discord.wasm | cut -f1))"
+    echo ""
+    echo "To install:"
+    echo "  mkdir -p ~/.ironclaw/channels"
+    echo "  cp discord.wasm discord.capabilities.json ~/.ironclaw/channels/"
+    echo ""
+    echo "Then add your bot token to secrets:"
+    echo "  # Set discord_bot_token and discord_public_key in your environment or secrets store"
+else
+    echo "Error: WASM output not found at $WASM_PATH"
+    exit 1
+fi

channels-src/whatsapp/build.sh

@@ -0,0 +1,48 @@
+#!/usr/bin/env bash
+# Build the WhatsApp channel WASM component
+#
+# Prerequisites:
+#   - Rust with wasm32-wasip2 target: rustup target add wasm32-wasip2
+#   - wasm-tools for component creation: cargo install wasm-tools
+#
+# Output:
+#   - whatsapp.wasm - WASM component ready for deployment
+#   - whatsapp.capabilities.json - Capabilities file (copy alongside .wasm)
+
+set -euo pipefail
+
+cd "$(dirname "$0")"
+
+if ! command -v wasm-tools &> /dev/null; then
+    echo "Error: wasm-tools not found. Install with: cargo install wasm-tools"
+    exit 1
+fi
+
+echo "Building WhatsApp channel WASM component..."
+
+# Build the WASM module
+cargo build --release --target wasm32-wasip2
+
+# Convert to component model (if not already a component)
+# wasm-tools component new is idempotent on components
+WASM_PATH="target/wasm32-wasip2/release/whatsapp_channel.wasm"
+
+if [ -f "$WASM_PATH" ]; then
+    # Create component if needed
+    wasm-tools component new "$WASM_PATH" -o whatsapp.wasm 2>/dev/null || cp "$WASM_PATH" whatsapp.wasm
+
+    # Optimize the component
+    wasm-tools strip whatsapp.wasm -o whatsapp.wasm
+
+    echo "Built: whatsapp.wasm ($(du -h whatsapp.wasm | cut -f1))"
+    echo ""
+    echo "To install:"
+    echo "  mkdir -p ~/.ironclaw/channels"
+    echo "  cp whatsapp.wasm whatsapp.capabilities.json ~/.ironclaw/channels/"
+    echo ""
+    echo "Then add your access token to secrets:"
+    echo "  # Set whatsapp_access_token in your environment or secrets store"
+else
+    echo "Error: WASM output not found at $WASM_PATH"
+    exit 1
+fi