vscode-weston-launcher: appends a Weston panel entry for VSCode

recipes-devtools/vscode/vscode-weston-launcher.bb

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+SUMMARY = "Weston panel launcher entry for Visual Studio Code"
+DESCRIPTION = "Optional companion package for meta-vscode: appends a [launcher] \
+section to /etc/xdg/weston/weston.ini at install time so the VSCode icon \
+appears on the Weston panel. Pull in via IMAGE_INSTALL when the target image \
+ships a Weston desktop and should expose VSCode as a one-click launch."
+LICENSE = "MIT"
+LIC_FILES_CHKSUM = "file://${COMMON_LICENSE_DIR}/MIT;md5=0835ade698e0bcf8506ecda2f7b4f302"
+
+# Pure config; no compile + no arch-specific content.
+inherit allarch
+
+# We don't build-depend on either package, only need them on the
+# target at install time.
+RDEPENDS:${PN} = "vscode weston-init"
+
+do_install() {
+    install -d ${D}${datadir}/vscode-weston-launcher
+    # The launcher fragment is appended verbatim to weston.ini at
+    # postinst. Sentinel comments delimit the block so prerm can
+    # cleanly strip it back out on package removal.
+    cat > ${D}${datadir}/vscode-weston-launcher/launcher.ini <<'EOF'
+
+# meta-vscode-launcher-begin
+[launcher]
+icon=${datadir}/vscode/resources/app/resources/linux/code.png
+path=${datadir}/vscode/bin/code
+displayname=Visual Studio Code
+# meta-vscode-launcher-end
+EOF
+}
+
+FILES:${PN} = "${datadir}/vscode-weston-launcher"
+
+pkg_postinst:${PN} () {
+    weston_ini="$D${sysconfdir}/xdg/weston/weston.ini"
+    fragment="$D${datadir}/vscode-weston-launcher/launcher.ini"
+    if [ -e "$weston_ini" ] && ! grep -q "meta-vscode-launcher-begin" "$weston_ini"; then
+        cat "$fragment" >> "$weston_ini"
+    fi
+}
+
+pkg_prerm:${PN} () {
+    weston_ini="$D${sysconfdir}/xdg/weston/weston.ini"
+    if [ -e "$weston_ini" ] && grep -q "meta-vscode-launcher-begin" "$weston_ini"; then
+        sed -i '/# meta-vscode-launcher-begin/,/# meta-vscode-launcher-end/d' "$weston_ini"
+    fi
+}