initial commit

.idea/.gitignore

+# Default ignored files
+/shelf/
+/workspace.xml
+# Editor-based HTTP Client requests
+/httpRequests/
+# Datasource local storage ignored files
+/dataSources/
+/dataSources.local.xml

.idea/glslopt.iml

+<?xml version="1.0" encoding="UTF-8"?>
+<module type="WEB_MODULE" version="4">
+  <component name="Go" enabled="true" />
+  <component name="NewModuleRootManager">
+    <content url="file://$MODULE_DIR$" />
+    <orderEntry type="inheritedJdk" />
+    <orderEntry type="sourceFolder" forTests="false" />
+  </component>
+</module>
\ No newline at end of file

.idea/modules.xml

+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="ProjectModuleManager">
+    <modules>
+      <module fileurl="file://$PROJECT_DIR$/.idea/glslopt.iml" filepath="$PROJECT_DIR$/.idea/glslopt.iml" />
+    </modules>
+  </component>
+</project>
\ No newline at end of file

README.md

+glsl-optimizer but without the cross-platform incompatibility nonsense of C++
+uses node because the project was compiled to javascript, and then wrapped in a Go CLI tool
+you can use it without Go by running `cd ./glslprep && node ./glslopt.js <type> <input> <output>`
\ No newline at end of file

glslprep/glslopt.js

+const fs = require("fs");
+
+var Module = require("./glsl-optimizer.js");
+var optimize_glsl = Module.cwrap('optimize_glsl', 'string', ['string', 'number', 'number']);
+var args = process.argv.slice(2)
+if (args.length != 3) {
+    console.log("usage: glslopt <vs|fs> <input> <output>")
+    return
+}
+
+var type = args[0] === "vs";
+var input = args[1];
+var output = args[2];
+
+fs.readFile(input, function(err,input) {
+    if (!err) {
+        var result = optimize_glsl("" + input, 3, type);
+        fs.writeFile(output, result, (err) => {
+            if (err) {
+                console.log(err)
+            }
+        })
+    } else {
+        console.log(err);
+    }
+});

go.mod

+module glslopt
+
+go 1.19
+
+require github.com/dop251/goja v0.0.0-20221003171542-5ea1285e6c91
+
+require (
+	github.com/dlclark/regexp2 v1.7.0 // indirect
+	github.com/go-sourcemap/sourcemap v2.1.3+incompatible // indirect
+	golang.org/x/text v0.3.7 // indirect
+)

go.sum

+github.com/creack/pty v1.1.9/go.mod h1:oKZEueFk5CKHvIhNR5MUki03XCEU+Q6VDXinZuGJ33E=
+github.com/dlclark/regexp2 v1.4.1-0.20201116162257-a2a8dda75c91/go.mod h1:2pZnwuY/m+8K6iRw6wQdMtk+rH5tNGR1i55kozfMjCc=
+github.com/dlclark/regexp2 v1.7.0 h1:7lJfhqlPssTb1WQx4yvTHN0uElPEv52sbaECrAQxjAo=
+github.com/dlclark/regexp2 v1.7.0/go.mod h1:DHkYz0B9wPfa6wondMfaivmHpzrQ3v9q8cnmRbL6yW8=
+github.com/dop251/goja v0.0.0-20211022113120-dc8c55024d06/go.mod h1:R9ET47fwRVRPZnOGvHxxhuZcbrMCuiqOz3Rlrh4KSnk=
+github.com/dop251/goja v0.0.0-20221003171542-5ea1285e6c91 h1:1PfaQuGdeJVnHHQ0tg0Jw7MXagyqaAupJyk35/QM3I4=
+github.com/dop251/goja v0.0.0-20221003171542-5ea1285e6c91/go.mod h1:yRkwfj0CBpOGre+TwBsqPV0IH0Pk73e4PXJOeNDboGs=
+github.com/dop251/goja_nodejs v0.0.0-20210225215109-d91c329300e7/go.mod h1:hn7BA7c8pLvoGndExHudxTDKZ84Pyvv+90pbBjbTz0Y=
+github.com/dop251/goja_nodejs v0.0.0-20211022123610-8dd9abb0616d/go.mod h1:DngW8aVqWbuLRMHItjPUyqdj+HWPvnQe8V8y1nDpIbM=
+github.com/go-sourcemap/sourcemap v2.1.3+incompatible h1:W1iEw64niKVGogNgBN3ePyLFfuisuzeidWPMPWmECqU=
+github.com/go-sourcemap/sourcemap v2.1.3+incompatible/go.mod h1:F8jJfvm2KbVjc5NqelyYJmf/v5J0dwNLS2mL4sNA1Jg=
+github.com/kr/pretty v0.1.0/go.mod h1:dAy3ld7l9f0ibDNOQOHHMYYIIbhfbHSm3C4ZsoJORNo=
+github.com/kr/pretty v0.2.1/go.mod h1:ipq/a2n7PKx3OHsz4KJII5eveXtPO4qwEXGdVfWzfnI=
+github.com/kr/pretty v0.3.0/go.mod h1:640gp4NfQd8pI5XOwp5fnNeVWj67G7CFk/SaSQn7NBk=
+github.com/kr/pty v1.1.1/go.mod h1:pFQYn66WHrOpPYNljwOMqo10TkYh1fy3cYio2l3bCsQ=
+github.com/kr/text v0.1.0/go.mod h1:4Jbv+DJW3UT/LiOwJeYQe1efqtUx/iVham/4vfdArNI=
+github.com/kr/text v0.2.0/go.mod h1:eLer722TekiGuMkidMxC/pM04lWEeraHUUmBw8l2grE=
+github.com/rogpeppe/go-internal v1.6.1/go.mod h1:xXDCJY+GAPziupqXw64V24skbSoqbTEfhy4qGm1nDQc=
+golang.org/x/text v0.3.6/go.mod h1:5Zoc/QRtKVWzQhOtBMvqHzDpF6irO9z98xDceosuGiQ=
+golang.org/x/text v0.3.7 h1:olpwvP2KacW1ZWvsR7uQhoyTYvKAupfQrRGBFM352Gk=
+golang.org/x/text v0.3.7/go.mod h1:u+2+/6zg+i71rQMx5EYifcz6MCKuco9NR6JIITiCfzQ=
+golang.org/x/tools v0.0.0-20180917221912-90fa682c2a6e/go.mod h1:n7NCudcB/nEzxVGmLbDWY5pfWTLqBcC2KZ6jyYvM4mQ=
+gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
+gopkg.in/check.v1 v1.0.0-20180628173108-788fd7840127/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
+gopkg.in/check.v1 v1.0.0-20201130134442-10cb98267c6c/go.mod h1:JHkPIbrfpd72SG/EVd6muEfDQjcINNoR0C8j2r3qZ4Q=
+gopkg.in/errgo.v2 v2.1.0/go.mod h1:hNsd1EY+bozCKY1Ytp96fpM3vjJbqLJn88ws8XvfDNI=
+gopkg.in/yaml.v2 v2.4.0 h1:D8xgwECY7CYvx+Y2n4sBz93Jn9JRvxdiyyo8CTfuKaY=
+gopkg.in/yaml.v2 v2.4.0/go.mod h1:RDklbk79AGWmwhnvt/jBztapEOGDOx6ZbXqjP6csGnQ=

main.go

+package main
+
+import (
+	"embed"
+	"flag"
+	"log"
+	"os"
+	"os/exec"
+	"path/filepath"
+	"strings"
+)
+
+const glslDir = "glslprep"
+
+//go:embed glslprep
+var GLSLPrep embed.FS
+
+func main() {
+	input := flag.String("input", "", "which file to optimize")
+	output := flag.String("output", "", "where to put the result")
+	flag.Parse()
+	if *input == "" || *output == "" {
+		panic("usage: glslopt --input=<input> --output=<output>")
+	}
+	err := Optimize(*input, *output)
+	if err != nil {
+		panic(err)
+	}
+}
+
+func copyTemp() (dir string, err error) {
+	dir, err = os.MkdirTemp("", glslDir)
+	if err != nil {
+		return
+	}
+
+	var files []os.DirEntry
+	files, err = GLSLPrep.ReadDir(glslDir)
+	if err != nil {
+		return
+	}
+
+	for _, f := range files {
+		var b []byte
+		b, err = GLSLPrep.ReadFile(glslDir + "/" + f.Name())
+		if err != nil {
+			log.Println("err here")
+			return
+		}
+
+		err = os.WriteFile(filepath.Join(dir, f.Name()), b, 0777)
+		if err != nil {
+			return
+		}
+	}
+
+	return
+}
+
+func Optimize(input, output string) error {
+	var shaderType string
+	if strings.HasSuffix(input, ".frag") {
+		shaderType = "fs"
+	} else {
+		shaderType = "vs"
+	}
+	dir, err := copyTemp()
+	if err != nil {
+		return err
+	}
+	defer os.RemoveAll(dir)
+	var absInput, absOutput string
+	absInput, err = filepath.Abs(input)
+	if err != nil {
+		return err
+	}
+	absOutput, err = filepath.Abs(output)
+	if err != nil {
+		return err
+	}
+	cmd := exec.Command("node", "./glslopt.js", shaderType, absInput, absOutput)
+	cmd.Dir = dir
+	var res []byte
+	res, err = cmd.Output()
+	if len(res) > 0 {
+		log.Println(string(res))
+	}
+	if err != nil {
+		return err
+	}
+
+	return nil
+}