added custom distro

layers/meta-devdistro/conf/distro/devdistro.conf

@@ -0,0 +1,33 @@
+DISTRO = "devdistro"
+DISTRO_NAME = "Custom Headless Distro for development"
+DISTRO_VERSION = "1.0"
+
+PREFERRED_PROVIDER_virtual/bootloader ?= "u-boot"
+
+# Use systemd (recommended for networking & ssh)
+DISTRO_FEATURES:append = "\
+    systemd \
+    usrmerge \
+    ipv4 \
+    ipv6 \
+"
+
+VIRTUAL-RUNTIME_init_manager = "systemd"
+VIRTUAL-RUNTIME_initscripts = ""
+DISTRO_FEATURES_BACKFILL_CONSIDERED += "sysvinit"
+
+# Explicitly remove graphics
+DISTRO_FEATURES:remove = "\
+    x11 \
+    wayland \
+    opengl \
+    directfb \
+"
+
+# No display-related features
+DISTRO_FEATURES_BACKFILL_CONSIDERED += "\
+    x11 wayland opengl directfb \
+"
+
+# Avoid pulling graphics via dependencies
+PACKAGECONFIG:remove:pn-qemu-system-native = "sdl gtk"

layers/meta-devdistro/conf/layer.conf

@@ -0,0 +1,16 @@
+# Add layer to BitBake search path
+BBPATH .= ":${LAYERDIR}"
+
+# Where recipes live
+BBFILES += "\
+    ${LAYERDIR}/recipes-*/*/*.bb \
+    ${LAYERDIR}/recipes-*/*/*.bbappend \
+"
+
+# Layer identification (REQUIRED)
+BBFILE_COLLECTIONS += "devdistro"
+BBFILE_PATTERN_devdistro = "^${LAYERDIR}/"
+BBFILE_PRIORITY_devdistro = "8"
+
+# Yocto release compatibility (REQUIRED, else warning)
+LAYERSERIES_COMPAT_devdistro = "scarthgap"

layers/meta-devdistro/recipes-core/images/dev-image-dev.bb

@@ -0,0 +1,9 @@
+DESCRIPTION = "Full headless image"
+
+require dev-image-full.bb
+
+IMAGE_INSTALL += "\
+    dtc \
+    gptfdisk \
+    util-linux \
+"

layers/meta-devdistro/recipes-core/images/dev-image-full.bb

@@ -0,0 +1,15 @@
+DESCRIPTION = "Full headless development image"
+
+require dev-image-net.bb
+
+IMAGE_FEATURES += "\
+    ssh-server-dropbear \
+"
+
+IMAGE_INSTALL += "\
+    btop \
+    ca-certificates \
+    curl \
+    htop \
+    vim \
+"

layers/meta-devdistro/recipes-core/images/dev-image-minimal.bb

@@ -0,0 +1,10 @@
+DESCRIPTION = "Minimal headless image"
+LICENSE = "MIT"
+
+inherit core-image
+
+IMAGE_INSTALL = "\
+    packagegroup-core-boot \
+"
+
+IMAGE_INSTALL:remove = "grub grub-efi grub-pc"

layers/meta-devdistro/recipes-core/images/dev-image-net.bb

@@ -0,0 +1,10 @@
+DESCRIPTION = "Minimal image with networking"
+
+require dev-image-minimal.bb
+
+IMAGE_INSTALL += "\
+    iproute2 \
+    ethtool \
+"
+
+SYSTEMD_AUTO_ENABLE += "systemd-networkd systemd-resolved"