Modify wasm Makefile to support alt emsdk sh path

Instead of storing pre-built Raylib lib and headers, use a script to
build Raylib on-demand for WASM builds.

third_party_build/wasm_make_raylib.sh

@@ -0,0 +1,126 @@
+#!/usr/bin/env bash
+
+EMSDK_ENV_SCRIPT="${HOME}/git/emsdk/emsdk_env.sh"
+OUTPUT_DIR="$(dirname "$0")/raylib_out"
+CLONE_DIR="$(dirname "$0")/raylib_clone"
+RAYLIB_GIT_URL="https://github.com/raysan5/raylib.git"
+RAYLIB_GIT_TAG="5.0"
+
+while getopts 'o:e:c:h' opt; do
+    case $opt in
+        'o')
+            OUTPUT_DIR="$OPTARG";;
+        'e')
+            EMSDK_ENV_SCRIPT="$OPTARG";;
+        'c')
+            CLONE_DIR="$OPTARG";;
+        'h')
+            echo "-o <output_dir>"
+            echo "-e <emsdk_env_sh>"
+            echo "-c <clone_dir>"
+            exit 0;;
+    esac
+done
+
+# Validate args
+
+if [[ -z "$OUTPUT_DIR" ]]; then
+    echo 'ERROR: The OUTPUT_DIR variable is an empty string!'
+    exit 1
+elif ! [[ -d "$OUTPUT_DIR" ]]; then
+    if ! mkdir -p "$OUTPUT_DIR"; then
+        echo "ERROR: Failed to 'mkdir -p \"$OUTPUT_DIR\"!"
+        exit 2
+    fi
+fi
+
+pushd "$OUTPUT_DIR" >&/dev/null
+OUTPUT_DIR="$(pwd)"
+popd >&/dev/null
+
+#echo "Using output dir: $OUTPUT_DIR"
+
+pushd "$CLONE_DIR" >&/dev/null
+CLONE_DIR="$(pwd)"
+popd >&/dev/null
+
+#echo "Using clone dir: $CLONE_DIR"
+
+if ! [[ -r "$EMSDK_ENV_SCRIPT" ]]; then
+    echo "ERROR: \"$EMSDK_ENV_SCRIPT\" is not readable!"
+    exit 3
+fi
+
+# Validate and set up Raylib git clone
+
+if ! [[ -d "$CLONE_DIR" ]]; then
+    if ! git clone --depth 1 --no-single-branch "$RAYLIB_GIT_URL" "$CLONE_DIR"; then
+        echo "ERROR: Failed to clone Raylib into \"$CLONE_DIR\"!"
+        exit 4
+    fi
+elif ! (cd "$CLONE_DIR" && git fetch --all -p && git checkout "$RAYLIB_GIT_TAG"); then
+    echo "ERROR: Failed to fetch/checkout in Raylib dir!"
+    exit 5
+fi
+
+function cleanup() {
+    cd "$CLONE_DIR"
+    git clean -xfd
+    git restore .
+}
+
+trap cleanup EXIT
+
+set -ve
+
+pushd "$CLONE_DIR" >&/dev/null
+
+# Patch for building for wasm.
+
+patch -N -p1 <<"EOF"
+Do not allow F12 usage as that is used in the browser for debugging purposes.
+
+For some reason, the variable `screenshotCounter` is still used.
+
+--- a/src/config.h
++++ b/src/config.h
+@@ -59,7 +59,7 @@
+ // Use a partial-busy wait loop, in this case frame sleeps for most of the time, but then runs a busy loop at the end for accuracy
+ #define SUPPORT_PARTIALBUSY_WAIT_LOOP    1
+ // Allow automatic screen capture of current screen pressing F12, defined in KeyCallback()
+-#define SUPPORT_SCREEN_CAPTURE          1
++//#define SUPPORT_SCREEN_CAPTURE          1
+ // Allow automatic gif recording of current screen pressing CTRL+F12, defined in KeyCallback()
+ #define SUPPORT_GIF_RECORDING           1
+ // Support CompressData() and DecompressData() functions
+--- a/src/rcore.c
++++ b/src/rcore.c
+@@ -349,9 +349,7 @@ RLAPI const char *raylib_version = RAYLIB_VERSION;  // raylib version exported s
+ 
+ CoreData CORE = { 0 };               // Global CORE state context
+ 
+-#if defined(SUPPORT_SCREEN_CAPTURE)
+ static int screenshotCounter = 0;    // Screenshots counter
+-#endif
+ 
+ #if defined(SUPPORT_GIF_RECORDING)
+ int gifFrameCounter = 0;             // GIF frames counter
+EOF
+
+# Do the build
+pushd src >&/dev/null
+(source "$EMSDK_ENV_SCRIPT"; make PLATFORM=PLATFORM_WEB)
+
+# Save the library
+install -D -m444 libraylib.a "$OUTPUT_DIR/lib/libraylib.a"
+
+# Save the library and relevant headers
+for header in libraylib.a raylib.h raymath.h; do
+    install -D -m444 "$header" "$OUTPUT_DIR/include/$header"
+done
+
+popd >&/dev/null
+
+popd >&/dev/null
+
+echo Success

wasm_build/.gitignore

@@ -3,3 +3,5 @@
 /jumpartifact.com_demo_0.wasm
 /jumpartifact.com_demo_0.data
 /objdir/
+/raylib
+/raylib_git

wasm_build/Makefile

@@ -38,13 +38,18 @@ HEADERS = \
 
 OBJECTS = $(addprefix ${OBJDIR}/,$(subst ..,PREVDIR,$(subst .cc,.cc.o,${SOURCES})))
 
-CXX = source ${HOME}/git/emsdk/emsdk_env.sh &>/dev/null && em++
+EMSDK_ENV_SH ?= ${HOME}/git/emsdk/emsdk_env.sh
+
+CXX = source ${EMSDK_ENV_SH} &>/dev/null && em++
 
 all: | format jumpartifact.com_demo_0.html
 
-jumpartifact.com_demo_0.html: ${OBJECTS} ${HEADERS}
+raylib/lib/libraylib.a raylib/include/raylib.h raylib/include/raymath.h:
+	../third_party_build/wasm_make_raylib.sh -o raylib -c raylib_git -e ${EMSDK_ENV_SH}
+
+jumpartifact.com_demo_0.html: raylib/lib/libraylib.a raylib/include/raylib.h raylib/include/raymath.h ${OBJECTS} ${HEADERS}
 	${CXX} -std=c++20 -o jumpartifact.com_demo_0.html \
-		-s USE_GLFW=3 -I../wasm_include -L../wasm_lib -lraylib \
+		-s USE_GLFW=3 -Iraylib/include -Lraylib/lib -lraylib \
 		--shell-file custom_shell.html \
 		-sEXPORTED_FUNCTIONS=_main \
 		-sEXPORTED_RUNTIME_METHODS=ccall \
@@ -68,4 +73,4 @@ format:
 
 ${OBJDIR}/%.cc.o: $$(subst PREVDIR,..,%.cc) ${HEADERS}
 	@mkdir -p "$(dir $@)"
-	${CXX} -std=c++20 -I../wasm_include -c ${OTHER_FLAGS} -o $@ $<
+	${CXX} -std=c++20 -Iraylib/include -c ${OTHER_FLAGS} -o $@ $<