[FEAT] util.sh update extensions.json with jq (lnbits#140)

usage: `sh util.sh update_extension example v0.4.2`

README.md

@@ -73,6 +73,12 @@ get lnbits env variables for all extensions
 sh util.sh env
 ```
 
+update a extension in extensions.json with id and version
+
+```sh
+sh util.sh update_extension example v0.4.2
+```
+
 ### Example video on how to release a extension into this repo
 
 this uses a github workflow like this: https://github.com/lnbits/example/blob/main/.github/workflows/release.yml

package.json

@@ -28,7 +28,7 @@
     "bugs": {
         "url": "https://github.com/lnbits/lnbits-extensions/issues"
     },
-    "homepage": "https://extensions.lnbits.org/",
+    "homepage": "https://extensions.lnbits.com/",
     "devDependencies": {
         "prettier": "^2.8.8",
         "sass": "^1.64.2",

util.sh

@@ -31,11 +31,29 @@ env() {
     echo "LNBITS_EXTENSIONS_DEFAULT_INSTALL=\"$env\""
 }
 
+# param: extension id (example)
+# param: key (version)
+# param: value (v0.0.0)
+update_extension_attribute(){
+    tmp=$(mktemp)
+    jq --indent 4 --arg id $1 --arg key $2 --arg value $3 \
+       '( .extensions[] | select(.id == $id) ) |= with_entries(if .key == $key then .value = $value else . end)' \
+       extensions.json > "$tmp" && mv "$tmp" extensions.json
+}
 
+# param: extension id (example)
+# param: version (v0.0.0)
+update_extension() {
+    archive="https://github.com/lnbits/$1/archive/ref/tags/$2.zip"
+    update_extension_attribute $1 version $2
+    update_extension_attribute $1 archive $archive
+    update_extension_attribute $1 hash $(wget -O - $archive 2> /dev/null | sha256sum | cut -d" " -f 1)
+}
 
 # execute functions
 $@
 
 # example
 # sh util.sh clone
 # sh util.sh pull
+# sh util.sh update_extension example "v0.0.0"