epom play common.sh: implement parse_json_value()

play.d/common.sh

@@ -143,6 +143,14 @@ install_pack_pkgurl()
     epm pack $repack --install $PKGNAME "$PKGURL" "$@"
 }
 
+# ["version"]
+parse_json_value()
+{
+    local field="$1"
+    echo "$field" | grep -q -E "^\[" || field='["'$field'"]'
+    epm tool json -b | grep -m1 -F "$field" | sed -e 's|.*[[:space:]]||' | sed -e 's|"\(.*\)"|\1|g'
+}
+
 snap_get_pkgurl()
 {
     local SNAPNAME="$1"

tests/test_json.sh

+#!/bin/sh
+
+# ["version"]
+parse_json_value()
+{
+    local field="$1"
+    echo "$field" | grep -q -E "^\[" || field='["'$field'"]'
+    epm tool json -b | grep -m1 -F "$field" | sed -e 's|.*[[:space:]]||' | sed -e 's|"\(.*\)"|\1|g'
+}
+
+# ["version"]	"0.48.8"
+# ["downloadUrl"]	"https://downloads.cursor.com/production/7801a556824585b7f2721900066bc87c4a09b743/linux/arm64/Cursor-0.48.8-aarch64.AppImage"
+# ["rehUrl"]	"https://cursor.blob.core.windows.net/remote-releases/7801a556824585b7f2721900066bc87c4a09b743/vscode-reh-linux-arm64.tar.gz"
+
+cat <<EOF | parse_json_value "downloadUrl"
+{"version":"0.48.8","downloadUrl":"https://downloads.cursor.com/production/7801a556824585b7f2721900066bc87c4a09b743/linux/arm64/Cursor-0.48.8-aarch64.AppImage","rehUrl":"https://cursor.blob.core.windows.net/remote-releases/7801a556824585b7f2721900066bc87c4a09b743/vscode-reh-linux-arm64.tar.gz"}
+EOF