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#!/bin/sh
# Bridge the External Editor Revived native messaging host into the
# org.mozilla.thunderbird flatpak. The host binary stays installed via
# pacman (`external-editor-revived`); we relocate the manifest into the
# sandbox and replace its binary path with a wrapper that re-enters the
# host via flatpak-spawn.
#
# Idempotent. Re-runs on script changes or whenever the host-side manifest
# content changes.
#
# host manifest hash: {{ output "sh" "-c" "for p in /usr/lib/mozilla/native-messaging-hosts/external_editor_revived.json /usr/lib/thunderbird/native-messaging-hosts/external_editor_revived.json; do [ -f \"$p\" ] && sha256sum \"$p\" && break; done; true" | sha256sum }}
set -eu
TB_APP=org.mozilla.thunderbird
MANIFEST_NAME=external_editor_revived.json
WRAPPER_NAME=external_editor_revived.sh
HOST_BINARY=/usr/lib/external-editor-revived/external-editor-revived
flatpak info --user "$TB_APP" >/dev/null 2>&1 || exit 0
# Locate the host-side manifest. Different PKGBUILDs have used different
# install dirs; prefer the canonical mozilla path, fall back to TB-specific.
HOST_MANIFEST=
for candidate in \
/usr/lib/mozilla/native-messaging-hosts/$MANIFEST_NAME \
/usr/lib/thunderbird/native-messaging-hosts/$MANIFEST_NAME \
/usr/lib64/mozilla/native-messaging-hosts/$MANIFEST_NAME; do
if [ -f "$candidate" ]; then
HOST_MANIFEST=$candidate
break
fi
done
[ -n "$HOST_MANIFEST" ] || {
echo "tb-eer: external-editor-revived manifest not found on host; install the package or skip TB native editor." >&2
exit 0
}
[ -x "$HOST_BINARY" ] || {
echo "tb-eer: $HOST_BINARY not executable on host; skipping." >&2
exit 0
}
# Allow flatpak-spawn --host from inside the sandbox.
flatpak override --user --talk-name=org.freedesktop.Flatpak "$TB_APP"
# In-sandbox path the manifest will reference. TB looks for user manifests
# at $HOME/.mozilla/native-messaging-hosts/ from inside its sandbox; from
# outside that maps to ~/.var/app/$TB_APP/.mozilla/native-messaging-hosts/.
SANDBOX_NMH_DIR="$HOME/.mozilla/native-messaging-hosts"
HOST_NMH_DIR="$HOME/.var/app/$TB_APP/.mozilla/native-messaging-hosts"
mkdir -p "$HOST_NMH_DIR"
# Wrapper that re-enters the host to invoke the real binary.
WRAPPER_HOST_PATH="$HOST_NMH_DIR/$WRAPPER_NAME"
WRAPPER_SANDBOX_PATH="$SANDBOX_NMH_DIR/$WRAPPER_NAME"
cat >"$WRAPPER_HOST_PATH" <<EOF
#!/bin/sh
exec flatpak-spawn --host "$HOST_BINARY" "\$@"
EOF
chmod +x "$WRAPPER_HOST_PATH"
# Rewrite the manifest's "path" field to point at the wrapper as seen from
# inside the sandbox.
TARGET_MANIFEST="$HOST_NMH_DIR/$MANIFEST_NAME"
if command -v jq >/dev/null 2>&1; then
jq --arg p "$WRAPPER_SANDBOX_PATH" '.path = $p' "$HOST_MANIFEST" >"$TARGET_MANIFEST.tmp"
mv "$TARGET_MANIFEST.tmp" "$TARGET_MANIFEST"
else
# Fallback: simple sed on the "path": "..." line. Brittle if the file
# ever becomes minified or contains escaped quotes — jq is preferred.
escaped=$(printf '%s' "$WRAPPER_SANDBOX_PATH" | sed 's/[\/&]/\\&/g')
sed -E "s|(\"path\"[[:space:]]*:[[:space:]]*\")[^\"]*(\")|\1$escaped\2|" \
"$HOST_MANIFEST" >"$TARGET_MANIFEST.tmp"
mv "$TARGET_MANIFEST.tmp" "$TARGET_MANIFEST"
fi
echo "tb-eer: External Editor Revived bridged into $TB_APP."
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