implement environment variable overrides for user and token in WASM; enhance asset fetching with debug logging

Author: cxjava

handler/handler_execute.go

@@ -73,7 +73,6 @@ func (h *Handler) getAssetsNoCache(q Query) (string, Assets, error) {
 	repo := q.Program
 	release := q.Release
 	//not cached - ask github
-	log.Printf("fetching asset info for %s/%s@%s", user, repo, release)
 	url := fmt.Sprintf("https://api.github.com/repos/%s/%s/releases", user, repo)
 	ghas := ghAssets{}
 	if release == "" || release == "latest" {
@@ -216,6 +215,7 @@ func (h *Handler) getAssetsNoCache(q Query) (string, Assets, error) {
 		indexKey := cAsset.Key()
 		// and will only be selected if the exact match failed
 		if _, exists := index[indexKey]; !exists {
+			log.Printf("[DEBUG] Adding candidate asset: %s -> %s", cAsset.Name, indexKey)
 			index[indexKey] = cAsset
 		}
 	}

handler/install.sh.qtpl

@@ -58,12 +58,22 @@ function install {
 		GET="$GET -H 'Authorization: $AUTH'"
 	fi
 	#find OS #TODO BSDs and other posixs
-	case `uname -s` in
-	Darwin) OS="darwin";;
-	Linux) OS="linux";;
+	{% if len(r.OS) > 0 %}
+	OS="{%s r.OS %}"
+	echo "Override OS: $OS"
+	{% else %}
+	OS=$(uname -s | tr '[:upper:]' '[:lower:]')
+	case "$OS" in
+	darwin) OS="darwin";;
+	linux) OS="linux";;
 	*) fail "unknown os: $(uname -s)";;
 	esac
+	{% endif %}
 	#find ARCH
+	{% if len(r.Arch) > 0 %}
+	ARCH="{%s r.Arch %}"
+	echo "Override architecture: $ARCH"
+	{% else %}
 	if uname -m | grep -E '(arm|arch)64' > /dev/null; then
 		ARCH="arm64"
 		{% if !r.M1Asset %}
@@ -81,6 +91,7 @@ function install {
 	else
 		fail "unknown arch: $(uname -m)"
 	fi
+	{% endif %}
 	#choose from asset list
 	URL=""
 	FTYPE=""

handler/install.sh.qtpl.go

@@ -6,52 +6,61 @@ import (
 
 func getOS(s string) string {
 	s = strings.ToLower(s)
+	var result string
 	switch {
 	case osReDarwin.MatchString(s):
-		return "darwin"
+		result = "darwin"
 	case osReDragonfly.MatchString(s):
-		return "dragonfly"
+		result = "dragonfly"
 	case osReWindows.MatchString(s):
-		return "windows"
+		result = "windows"
 	case osReMisc.MatchString(s):
 		// return the first capturing group (contains only the alphanumeric characters)
-		return osReMisc.FindStringSubmatch(s)[1]
+		matches := osReMisc.FindStringSubmatch(s)
+		if len(matches) > 1 {
+			result = matches[1]
+		}
 	default:
-		return ""
+		result = ""
 	}
+	return result
 }
 
 func getArch(s string) string {
 	s = strings.ToLower(s)
+	var result string
 	switch {
 	case archReLoong64.MatchString(s):
-		return "loong64"
+		result = "loong64"
 	case archRePPC64.MatchString(s):
-		return "ppc64"
+		result = "ppc64"
 	case archRePPC64LE.MatchString(s):
-		return "ppc64le"
+		result = "ppc64le"
 	case archReRiscv64.MatchString(s):
-		return "riscv64"
+		result = "riscv64"
 	case archReArm64.MatchString(s):
-		return "arm64"
+		result = "arm64"
 	case archReAmd64.MatchString(s):
-		return "amd64"
+		result = "amd64"
 	case archReArm.MatchString(s):
-		return "arm"
+		result = "arm"
 	case archRe386.MatchString(s):
-		return "386"
+		result = "386"
 	case archReMisc.MatchString(s):
-		return archReMisc.FindStringSubmatch(s)[1]
-
+		matches := archReMisc.FindStringSubmatch(s)
+		if len(matches) > 1 {
+			result = matches[1]
+		}
 	// fuzz match 'x?64(bit)?'
 	case fuzzArchAmd64.MatchString(s):
-		return "amd64"
+		result = "amd64"
 	// fuzz match 'x?32(bit)?'
 	case fuzzArch386.MatchString(s):
-		return "386"
+		result = "386"
 	default:
-		return ""
+		result = ""
 	}
+	return result
 }
 
 func getFileExt(s string) string {