Simple conversion script that converts Godot html5 export to gzipped version, with decompressing wasm and pck files using pako

convert.sh

#!/bin/bash
### usage ./convert.sh game
## where game is baseName of the export
 
if [ ! "$1" ]; then
    read -p 'Game name: ' game
else
    game="$1"
fi

echo "gzipping wasm and pck files"

gzip -f "$game.wasm"
gzip -f "$game.pck"

f="$game.html"
if [ -f $f -a -r $f ]; then
f="$f"
else
f="index.html"
fi
 
inflate=$(cat <<\EOF
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e;f--,c+=a[o++]<<de,de+=8}e.adler=i.check=n(c),c=0,de=0,i.mode=M;case M:if(0===i.havedict)return e.next_out=s,e.avail_out=u,e.next_in=o,e.avail_in=f,i.hold=c,i.bits=de,B;e.adler=i.check=1,i.mode=K;case K:if(t===x||t===y)break e;case P:if(i.last){c>>>=7&de,de-=7&de,i.mode=ae;break}for(;de<3;){if(0===f)break e;f--,c+=a[o++]<<de,de+=8}switch(i.last=1&c,c>>>=1,de-=1,3&c){case 0:i.mode=Y;break;case 1:if(l(i),i.mode=Q,t===y){c>>>=2,de-=2;break e}break;case 2:i.mode=X;break;case 3:e.msg="invalid block type",i.mode=se}c>>>=2,de-=2;break;case Y:for(c>>>=7&de,de-=7&de;de<32;){if(0===f)break e;f--,c+=a[o++]<<de,de+=8}if((65535&c)!=(c>>>16^65535)){e.msg="invalid stored block lengths",i.mode=se;break}if(i.length=65535&c,c=0,de=0,i.mode=q,t===y)break e;case q:i.mode=G;case G:if(he=i.length){if(he>f&&(he=f),he>u&&(he=u),0===he)break e;h.arraySet(r,a,o,he,s),f-=he,o+=he,u-=he,s+=he,i.length-=he;break}i.mode=K;break;case X:for(;de<14;){if(0===f)break e;f--,c+=a[o++]<<de,de+=8}if(i.nlen=257+(31&c),c>>>=5,de-=5,i.ndist=1+(31&c),c>>>=5,de-=5,i.ncode=4+(15&c),c>>>=4,de-=4,i.nlen>286||i.ndist>30){e.msg="too many length or distance symbols",i.mode=se;break}i.have=0,i.mode=W;case W:for(;i.have<i.ncode;){for(;de<3;){if(0===f)break e;f--,c+=a[o++]<<de,de+=8}i.lens[Ae[i.have++]]=7&c,c>>>=3,de-=3}for(;i.have<19;)i.lens[Ae[i.have++]]=0;if(i.lencode=i.lendyn,i.lenbits=7,Se={bits:i.lenbits},ye=k(_,i.lens,0,19,i.lencode,0,i.work,Se),i.lenbits=Se.bits,ye){e.msg="invalid code lengths set",i.mode=se;break}i.have=0,i.mode=J;case J:for(;i.have<i.nlen+i.ndist;){for(;Be=i.lencode[c&(1<<i.lenbits)-1],me=Be>>>24,ke=Be>>>16&255,_e=65535&Be,!(me<=de);){if(0===f)break e;f--,c+=a[o++]<<de,de+=8}if(_e<16)c>>>=me,de-=me,i.lens[i.have++]=_e;else{if(16===_e){for(Ee=me+2;de<Ee;){if(0===f)break e;f--,c+=a[o++]<<de,de+=8}if(c>>>=me,de-=me,0===i.have){e.msg="invalid bit length repeat",i.mode=se;break}xe=i.lens[i.have-1],he=3+(3&c),c>>>=2,de-=2}else if(17===_e){for(Ee=me+3;de<Ee;){if(0===f)break e;f--,c+=a[o++]<<de,de+=8}de-=me,xe=0,he=3+(7&(c>>>=me)),c>>>=3,de-=3}else{for(Ee=me+7;de<Ee;){if(0===f)break e;f--,c+=a[o++]<<de,de+=8}de-=me,xe=0,he=11+(127&(c>>>=me)),c>>>=7,de-=7}if(i.have+he>i.nlen+i.ndist){e.msg="invalid bit length repeat",i.mode=se;break}for(;he--;)i.lens[i.have++]=xe}}if(i.mode===se)break;if(0===i.lens[256]){e.msg="invalid code -- missing end-of-block",i.mode=se;break}if(i.lenbits=9,Se={bits:i.lenbits},ye=k(g,i.lens,0,i.nlen,i.lencode,0,i.work,Se),i.lenbits=Se.bits,ye){e.msg="invalid literal/lengths set",i.mode=se;break}if(i.distbits=6,i.distcode=i.distdyn,Se={bits:i.distbits},ye=k(v,i.lens,i.nlen,i.ndist,i.distcode,0,i.work,Se),i.distbits=Se.bits,ye){e.msg="invalid distances set",i.mode=se;break}if(i.mode=Q,t===y)break e;case Q:i.mode=V;case V:if(f>=6&&u>=258){e.next_out=s,e.avail_out=u,e.next_in=o,e.avail_in=f,i.hold=c,i.bits=de,m(e,ce),s=e.next_out,r=e.output,u=e.avail_out,o=e.next_in,a=e.input,f=e.avail_in,c=i.hold,de=i.bits,i.mode===K&&(i.back=-1);break}for(i.back=0;Be=i.lencode[c&(1<<i.lenbits)-1],me=Be>>>24,ke=Be>>>16&255,_e=65535&Be,!(me<=de);){if(0===f)break e;f--,c+=a[o++]<<de,de+=8}if(ke&&0==(240&ke)){for(ge=me,ve=ke,pe=_e;Be=i.lencode[pe+((c&(1<<ge+ve)-1)>>ge)],me=Be>>>24,ke=Be>>>16&255,_e=65535&Be,!(ge+me<=de);){if(0===f)break e;f--,c+=a[o++]<<de,de+=8}c>>>=ge,de-=ge,i.back+=ge}if(c>>>=me,de-=me,i.back+=me,i.length=_e,0===ke){i.mode=ne;break}if(32&ke){i.back=-1,i.mode=K;break}if(64&ke){e.msg="invalid literal/length code",i.mode=se;break}i.extra=15&ke,i.mode=$;case $:if(i.extra){for(Ee=i.extra;de<Ee;){if(0===f)break e;f--,c+=a[o++]<<de,de+=8}i.length+=c&(1<<i.extra)-1,c>>>=i.extra,de-=i.extra,i.back+=i.extra}i.was=i.length,i.mode=ee;case ee:for(;Be=i.distcode[c&(1<<i.distbits)-1],me=Be>>>24,ke=Be>>>16&255,_e=65535&Be,!(me<=de);){if(0===f)break e;f--,c+=a[o++]<<de,de+=8}if(0==(240&ke)){for(ge=me,ve=ke,pe=_e;Be=i.distcode[pe+((c&(1<<ge+ve)-1)>>ge)],me=Be>>>24,ke=Be>>>16&255,_e=65535&Be,!(ge+me<=de);){if(0===f)break e;f--,c+=a[o++]<<de,de+=8}c>>>=ge,de-=ge,i.back+=ge}if(c>>>=me,de-=me,i.back+=me,64&ke){e.msg="invalid distance code",i.mode=se;break}i.offset=_e,i.extra=15&ke,i.mode=te;case te:if(i.extra){for(Ee=i.extra;de<Ee;){if(0===f)break e;f--,c+=a[o++]<<de,de+=8}i.offset+=c&(1<<i.extra)-1,c>>>=i.extra,de-=i.extra,i.back+=i.extra}if(i.offset>i.dmax){e.msg="invalid distance too far back",i.mode=se;break}i.mode=ie;case ie:if(0===u)break e;if(he=ce-u,i.offset>he){if((he=i.offset-he)>i.whave&&i.sane){e.msg="invalid distance too far back",i.mode=se;break}he>i.wnext?(he-=i.wnext,be=i.wsize-he):be=i.wnext-he,he>i.length&&(he=i.length),we=i.window}else we=r,be=s-i.offset,he=i.length;he>u&&(he=u),u-=he,i.length-=he;do{r[s++]=we[be++]}while(--he);0===i.length&&(i.mode=V);break;case ne:if(0===u)break e;r[s++]=i.length,u--,i.mode=V;break;case ae:if(i.wrap){for(;de<32;){if(0===f)break e;f--,c|=a[o++]<<de,de+=8}if(ce-=u,e.total_out+=ce,i.total+=ce,ce&&(e.adler=i.check=i.flags?w(i.check,r,ce,s-ce):b(i.check,r,ce,s-ce)),ce=u,(i.flags?c:n(c))!==i.check){e.msg="incorrect data check",i.mode=se;break}c=0,de=0}i.mode=re;case re:if(i.wrap&&i.flags){for(;de<32;){if(0===f)break e;f--,c+=a[o++]<<de,de+=8}if(c!==(4294967295&i.total)){e.msg="incorrect length check",i.mode=se;break}c=0,de=0}i.mode=oe;case oe:ye=E;break e;case se:ye=A;break e;case fe:return z;case le:default:return Z}return e.next_out=s,e.avail_out=u,e.next_in=o,e.avail_in=f,i.hold=c,i.bits=de,(i.wsize||ce!==e.avail_out&&i.mode<se&&(i.mode<ae||t!==p))&&d(e,e.output,e.next_out,ce-e.avail_out)?(i.mode=fe,z):(ue-=e.avail_in,ce-=e.avail_out,e.total_in+=ue,e.total_out+=ce,i.total+=ce,i.wrap&&ce&&(e.adler=i.check=i.flags?w(i.check,r,ce,e.next_out-ce):b(i.check,r,ce,e.next_out-ce)),e.data_type=i.bits+(i.last?64:0)+(i.mode===K?128:0)+(i.mode===Q||i.mode===q?256:0),(0===ue&&0===ce||t===p)&&ye===S&&(ye=R),ye)},i.inflateEnd=function(e){if(!e||!e.state)return Z;var t=e.state;return t.window&&(t.window=null),e.state=null,S},i.inflateGetHeader=function(e,t){var i;return e&&e.state?0==(2&(i=e.state).wrap)?Z:(i.head=t,t.done=!1,S):Z},i.inflateSetDictionary=function(e,t){var i,n,a=t.length;return e&&e.state?0!==(i=e.state).wrap&&i.mode!==M?Z:i.mode===M&&(n=1,(n=b(n,t,a,0))!==i.check)?A:d(e,t,a,a)?(i.mode=fe,z):(i.havedict=1,S):Z},i.inflateInfo="pako inflate (from Nodeca project)"},{"../utils/common":1,"./adler32":3,"./crc32":5,"./inffast":7,"./inftrees":9}],9:[function(e,t,i){"use strict";var n=e("../utils/common"),a=[3,4,5,6,7,8,9,10,11,13,15,17,19,23,27,31,35,43,51,59,67,83,99,115,131,163,195,227,258,0,0],r=[16,16,16,16,16,16,16,16,17,17,17,17,18,18,18,18,19,19,19,19,20,20,20,20,21,21,21,21,16,72,78],o=[1,2,3,4,5,7,9,13,17,25,33,49,65,97,129,193,257,385,513,769,1025,1537,2049,3073,4097,6145,8193,12289,16385,24577,0,0],s=[16,16,16,16,17,17,18,18,19,19,20,20,21,21,22,22,23,23,24,24,25,25,26,26,27,27,28,28,29,29,64,64];t.exports=function(e,t,i,f,l,d,u,c){var h,b,w,m,k,_,g,v,p,x=c.bits,y=0,S=0,E=0,B=0,Z=0,A=0,z=0,R=0,N=0,O=0,C=null,I=0,T=new n.Buf16(16),U=new n.Buf16(16),D=null,F=0;for(y=0;y<=15;y++)T[y]=0;for(S=0;S<f;S++)T[t[i+S]]++;for(Z=x,B=15;B>=1&&0===T[B];B--);if(Z>B&&(Z=B),0===B)return l[d++]=20971520,l[d++]=20971520,c.bits=1,0;for(E=1;E<B&&0===T[E];E++);for(Z<E&&(Z=E),R=1,y=1;y<=15;y++)if(R<<=1,(R-=T[y])<0)return-1;if(R>0&&(0===e||1!==B))return-1;for(U[1]=0,y=1;y<15;y++)U[y+1]=U[y]+T[y];for(S=0;S<f;S++)0!==t[i+S]&&(u[U[t[i+S]]++]=S);if(0===e?(C=D=u,_=19):1===e?(C=a,I-=257,D=r,F-=257,_=256):(C=o,D=s,_=-1),O=0,S=0,y=E,k=d,A=Z,z=0,w=-1,N=1<<Z,m=N-1,1===e&&N>852||2===e&&N>592)return 1;for(;;){g=y-z,u[S]<_?(v=0,p=u[S]):u[S]>_?(v=D[F+u[S]],p=C[I+u[S]]):(v=96,p=0),h=1<<y-z,E=b=1<<A;do{l[k+(O>>z)+(b-=h)]=g<<24|v<<16|p|0}while(0!==b);for(h=1<<y-1;O&h;)h>>=1;if(0!==h?(O&=h-1,O+=h):O=0,S++,0==--T[y]){if(y===B)break;y=t[i+u[S]]}if(y>Z&&(O&m)!==w){for(0===z&&(z=Z),k+=E,R=1<<(A=y-z);A+z<B&&!((R-=T[A+z])<=0);)A++,R<<=1;if(N+=1<<A,1===e&&N>852||2===e&&N>592)return 1;l[w=O&m]=Z<<24|A<<16|k-d|0}}return 0!==O&&(l[k+O]=y-z<<24|64<<16|0),c.bits=Z,0}},{"../utils/common":1}],10:[function(e,t,i){"use strict";t.exports={2:"need dictionary",1:"stream end",0:"","-1":"file error","-2":"stream error","-3":"data error","-4":"insufficient memory","-5":"buffer error","-6":"incompatible version"}},{}],11:[function(e,t,i){"use strict";t.exports=function(){this.input=null,this.next_in=0,this.avail_in=0,this.total_in=0,this.output=null,this.next_out=0,this.avail_out=0,this.total_out=0,this.msg="",this.state=null,this.data_type=2,this.adler=0}},{}],"/lib/inflate.js":[function(e,t,i){"use strict";function n(e){if(!(this instanceof n))return new n(e);this.options=o.assign({chunkSize:16384,windowBits:0,to:""},e||{});var t=this.options;t.raw&&t.windowBits>=0&&t.windowBits<16&&(t.windowBits=-t.windowBits,0===t.windowBits&&(t.windowBits=-15)),!(t.windowBits>=0&&t.windowBits<16)||e&&e.windowBits||(t.windowBits+=32),t.windowBits>15&&t.windowBits<48&&0==(15&t.windowBits)&&(t.windowBits|=15),this.err=0,this.msg="",this.ended=!1,this.chunks=[],this.strm=new d,this.strm.avail_out=0;var i=r.inflateInit2(this.strm,t.windowBits);if(i!==f.Z_OK)throw new Error(l[i]);this.header=new u,r.inflateGetHeader(this.strm,this.header)}function a(e,t){var i=new n(t);if(i.push(e,!0),i.err)throw i.msg||l[i.err];return i.result}var r=e("./zlib/inflate"),o=e("./utils/common"),s=e("./utils/strings"),f=e("./zlib/constants"),l=e("./zlib/messages"),d=e("./zlib/zstream"),u=e("./zlib/gzheader"),c=Object.prototype.toString;n.prototype.push=function(e,t){var i,n,a,l,d,u,h=this.strm,b=this.options.chunkSize,w=this.options.dictionary,m=!1;if(this.ended)return!1;n=t===~~t?t:!0===t?f.Z_FINISH:f.Z_NO_FLUSH,"string"==typeof e?h.input=s.binstring2buf(e):"[object ArrayBuffer]"===c.call(e)?h.input=new Uint8Array(e):h.input=e,h.next_in=0,h.avail_in=h.input.length;do{if(0===h.avail_out&&(h.output=new o.Buf8(b),h.next_out=0,h.avail_out=b),(i=r.inflate(h,f.Z_NO_FLUSH))===f.Z_NEED_DICT&&w&&(u="string"==typeof w?s.string2buf(w):"[object ArrayBuffer]"===c.call(w)?new Uint8Array(w):w,i=r.inflateSetDictionary(this.strm,u)),i===f.Z_BUF_ERROR&&!0===m&&(i=f.Z_OK,m=!1),i!==f.Z_STREAM_END&&i!==f.Z_OK)return this.onEnd(i),this.ended=!0,!1;h.next_out&&(0!==h.avail_out&&i!==f.Z_STREAM_END&&(0!==h.avail_in||n!==f.Z_FINISH&&n!==f.Z_SYNC_FLUSH)||("string"===this.options.to?(a=s.utf8border(h.output,h.next_out),l=h.next_out-a,d=s.buf2string(h.output,a),h.next_out=l,h.avail_out=b-l,l&&o.arraySet(h.output,h.output,a,l,0),this.onData(d)):this.onData(o.shrinkBuf(h.output,h.next_out)))),0===h.avail_in&&0===h.avail_out&&(m=!0)}while((h.avail_in>0||0===h.avail_out)&&i!==f.Z_STREAM_END);return i===f.Z_STREAM_END&&(n=f.Z_FINISH),n===f.Z_FINISH?(i=r.inflateEnd(this.strm),this.onEnd(i),this.ended=!0,i===f.Z_OK):n!==f.Z_SYNC_FLUSH||(this.onEnd(f.Z_OK),h.avail_out=0,!0)},n.prototype.onData=function(e){this.chunks.push(e)},n.prototype.onEnd=function(e){e===f.Z_OK&&("string"===this.options.to?this.result=this.chunks.join(""):this.result=o.flattenChunks(this.chunks)),this.chunks=[],this.err=e,this.msg=this.strm.msg},i.Inflate=n,i.inflate=a,i.inflateRaw=function(e,t){return t=t||{},t.raw=!0,a(e,t)},i.ungzip=a},{"./utils/common":1,"./utils/strings":2,"./zlib/constants":4,"./zlib/gzheader":6,"./zlib/inflate":8,"./zlib/messages":10,"./zlib/zstream":11}]},{},[])("/lib/inflate.js")});</script>
EOF
)
inflate=$(echo $inflate | sed -e 's/[\/&]/\\&/g')

find="<script type=\"text/javascript\" src=\"$game.js\"></script>"
replace="$inflate<script type=\"text/javascript\" src=\"$game.js\"></script>"
if grep -q "'$game.js'" "$f"; then
    echo "using 3.1 version"
    find="<script type='text/javascript' src='$game.js'></script>"
    replace="$inflate<script type='text/javascript' src='$game.js'></script>"
fi    

if [[ "$OSTYPE" = *"linux"* ]]; then
SED="sed -i\"\""
else
SED="sed -i \"\""
fi

echo "placing paco inside $f..."
$SED -e "s@$find@$replace@" "$f"

echo "modifying $game.js to load gziped files..."
find="function loadXHR(resolve, reject, file, tracker) {"
replace=$(cat <<\EOF
    function loadXHR(resolve, reject, file, tracker) {  if (file.substr(-5) === '.wasm' || file.substr(-4) === '.pck') { file += '.gz'; var resolve_orig = resolve; resolve = function(xhr) { return resolve_orig(xhr.responseURL.substr(-3) === '.gz' ? { response: pako.inflate(xhr.response),    responseType: xhr.responseType, responseURL: xhr.responseURL, status: xhr.status,   statusText: xhr.statusText } : xhr); }; }
EOF
)

$SED -e "s@$find@$replace@" "$game.js"

Hello! This seems like a useful script to optimize Godot game space, and I am really thankful to the creators. However, it is currently not working for me. I am using what is esentially the default export template but when I run the script I get this error:

I am on Windows and using Git Bash to run the .sh file

Full guide for 4.4/4.5 (works on local server):
0. include pako script to your index.html

1. Do this https://gist.github.com/natrim/1a19f4b7668e0474897f3f28171f3b33?permalink_comment_id=4766236#gistcomment-4766236
2. For loadFetch function move this part
   if (file.endsWith(".wasm") || file.endsWith(".pck")) { file += ".gz" }
   to the beginning of the function.
3. If you use gdextension as I do, you need to do the trick for dynamic libs loading, find
   var asyncLoad = async url => {
   and replace the body with
   var asyncLoad = async url => { var Ziped = url.endsWith(".pck") || url.endsWith(".wasm"); if (Ziped) { url += ".gz"; } var arrayBuffer = await readAsync(url); assert(arrayBuffer,Loading data file "${url}" failed (no arrayBuffer).); if (Ziped) { return new Uint8Array(pako.inflate(arrayBuffer)); } return new Uint8Array(arrayBuffer); };
4. it is also possible to gzip index.js and decompress it using pako (write script in index.html)
5. don't forget to use minify for index.js before gzipping it.

Maybe I'll do video for all this later and upload it to YT!!!