I'm using this command from a new image type

'''

gpg --homedir home --encrypt --sign --default-key "server@..." --pinentry-mode loopback --passphrase-file server.passphrase  --recipient "device@..." --output ${IMAGE_LINK_NAME}.fw ${IMGDEPLOYDIR}/${IMAGE_NAME}.img

'''

From yocto build I get this error

'''

| gpg: can't connect to the agent: File name too long
| gpg: Warning: not using 'server@...' as default key: No secret key
| gpg: all values passed to '--default-key' ignored

'''

I added this img_ota.bbclass

'''

inherit image_types image_types_tegra pythonnative

create_img_ota_pkg() {
    rm -rf "${WORKDIR}/my_img"
    mkdir -p "${WORKDIR}/my_img"
    oldwd=`pwd`
    cd "${WORKDIR}/my_img"
    ln -sf "${STAGING_DATADIR_NATIVE}/gpg-keys/" home
    ln -sf "${STAGING_DATADIR_NATIVE}/gpg-keys/update.passphrase" update.passphrase
    ln -sf "${STAGING_DATADIR_NATIVE}/gpg-keys/encrypt.py" encrypt.py
    ln -sf "${IMGDEPLOYDIR}/${IMAGE_LINK_NAME}.img" "${IMAGE_LINK_NAME}.img"
    #gpg --homedir home --encrypt --sign --default-key "server@..." --pinentry-mode loopback --passphrase-file server.passphrase  --recipient "device@..." --output ${IMAGE_LINK_NAME}.fw ${IMGDEPLOYDIR}/${IMAGE_NAME}.img
    echo $(which python3)
    python3 encrypt.py blabla.fw ${IMAGE_LINK_NAME}.img
    cd oldwd
}

create_my_pkg[vardepsexclude] += "DATETIME"

IMAGE_CMD_img_ota = "create_img_ota_pkg"
do_image_img_ota[depends] += " \
    gpg-keys-native:do_populate_sysroot \
"

IMAGE_TYPEDEP_img_ota += "tegraflash"
IMAGE_TYPES += "img_ota"

'''

I have a native recipe creating the gpg db and install the keys.

I did check the gpg and gpg-agent binaries used come from /test-warrior/build-jetson-xavier/tmp/work/jetson_xavier-poky-linux/test-image/1.0-r0/recipe-sysroot-native/usr/bin

I tried to wrap the command in a python script but it had no effect.

If I open a terminal, add  /test-warrior/build-jetson-xavier/tmp/work/jetson_xavier-poky-linux/test-image/1.0-r0/recipe-sysroot-native/usr/bin to PATH and run the commands, they go through successfully and I don't manage to reproduce the error.

What is different with bitbake which could make this fail?

Thanks

-Damien