Add Development Mode Support

[mihai-chiorean]

Description

Add optional development mode that includes WiFi configuration, SSH keys, and other developer conveniences.

Features

When DEVELOPMENT=true:

• Auto-configure WiFi from wpa_supplicant.conf
• Deploy SSH authorized_keys
• Configure Docker group
• Enable additional debugging tools

Implementation

1. Build Variable

# local.conf
DEVELOPMENT = "true"

2. Conditional Recipe Inclusion

# edgeos-image.bb
IMAGE_INSTALL += " \
    ${@bb.utils.contains('DEVELOPMENT', 'true', 'packagegroup-edgeos-dev', '', d)} \
    "

3. Development Package Group

# packagegroup-edgeos-dev.bb
RDEPENDS:${PN} = " \
    wpa-supplicant \
    docker \
    gdb \
    strace \
    tcpdump \
    "

4. Configuration Files

# edgeos-dev-config.bb
do_install() {
    if [ "${DEVELOPMENT}" = "true" ]; then
        # Install WiFi config
        install -d ${D}${sysconfdir}/wpa_supplicant
        install -m 600 ${WORKDIR}/wpa_supplicant.conf \
            ${D}${sysconfdir}/wpa_supplicant/
        
        # Install SSH keys
        install -d ${D}/home/root/.ssh
        install -m 600 ${WORKDIR}/authorized_keys \
            ${D}/home/root/.ssh/
    fi
}

5. Docker Group Setup

# Add user to docker group
EXTRA_USERS_PARAMS = "\
    groupadd -r docker; \
    usermod -a -G docker root; \
    "

Security Considerations

• Development mode should NOT be enabled for production builds
• Add clear warnings in documentation
• Consider separate image targets (edgeos-image vs edgeos-image-dev)

Acceptance Criteria

• Development features only included when variable set
• WiFi auto-connects in dev mode
• SSH key authentication works
• Docker commands work without sudo
• No development features in production builds
• Clear documentation about security implications