-tarball="syncthing-linux-amd64-v${SYNCTHING_VERSION}.tar.gz" \
- && curl -sfSL "https://github.com/syncthing/syncthing/releases/download/v${SYNCTHING_VERSION}/${tarball}" -O \
- && curl -sfSL "https://github.com/syncthing/syncthing/releases/download/v${SYNCTHING_VERSION}/sha1sum.txt.asc" -O \
- && gpg -q --verify sha1sum.txt.asc \
- && grep -E " ${tarball}\$" sha1sum.txt.asc | sha1sum -c - \
- && rm sha1sum.txt.asc \
- && tar -xvf "$tarball" --strip-components=1 "$(basename "$tarball" .tar.gz)"/syncthing \
- && mv syncthing ${DESTDIR}/syncthing || exit 1
+# Workaround about issue with the particular GPG keyserver:
+# trying several explicit keyservers until the command succeeds
+# (see https://github.com/jacobalberty/unifi-docker/issues/64)
+for server in $(shuf -e ha.pool.sks-keyservers.net \
+ hkp://p80.pool.sks-keyservers.net:80 \
+ keyserver.ubuntu.com \
+ hkp://keyserver.ubuntu.com:80 \
+ pgp.mit.edu) ; do
+ ${GPG} -q --keyserver "$server" --recv-keys 37C84554E7E0A261E4F76E1ED26E6ED000654A3E && break || :
+done
+
+tarball="syncthing-${GOOS_ST}-${GOARCH}-v${SYNCTHING_VERSION}.${TB_EXT}" \
+ && curl --connect-timeout 60 --retry 3 -sfSL "https://github.com/syncthing/syncthing/releases/download/v${SYNCTHING_VERSION}/${tarball}" -O \
+ && curl --connect-timeout 60 --retry 3 -sfSL "https://github.com/syncthing/syncthing/releases/download/v${SYNCTHING_VERSION}/sha1sum.txt.asc" -O \
+ && gpg -q --verify sha1sum.txt.asc \
+ && grep -E " ${tarball}\$" sha1sum.txt.asc | sha1sum -c - \
+ && rm -rf sha1sum.txt.asc syncthing-${GOOS_ST}-${GOARCH}-v${SYNCTHING_VERSION}
+ if [ "${TB_EXT}" = "tar.gz" ]; then
+ tar -xvf "$tarball" --strip-components=1 "$(basename "$tarball" .tar.gz)"/syncthing \
+ && mv syncthing ${DESTDIR}/syncthing || exit 1
+ else
+ unzip "$tarball" && mv syncthing-windows-*/syncthing.exe ${DESTDIR}/syncthing.exe || exit 1
+ fi