Added hostname parameter

README.md

@@ -62,7 +62,7 @@ The following environment variables are supported:
    be built and cached.  Note, `WORK_DIR` stores a complete copy of the target
    system for each build stage, amounting to tens of gigabytes in the case of
    Raspbian.
-   
+
    **CAUTION**: If your working directory is on an NTFS partition you probably won't be able to build. Make sure this is a proper Linux filesystem.
 
  * `DEPLOY_DIR`  (Default: `"$BASE_DIR/deploy"`)
@@ -82,6 +82,10 @@ The following environment variables are supported:
 
    Default system locale.
 
+ * `HOSTNAME` (Default: "raspberrypi" )
+
+   Setting the hostname to the specified value.
+
  * `KEYBOARD_KEYMAP` (Default: "gb" )
 
    Default keyboard keymap.

build.sh

@@ -161,6 +161,8 @@ export DEPLOY_DIR=${DEPLOY_DIR:-"${BASE_DIR}/deploy"}
 export DEPLOY_ZIP="${DEPLOY_ZIP:-1}"
 export LOG_FILE="${WORK_DIR}/build.log"
 
+export HOSTNAME=${HOSTNAME:-raspberrypi}
+
 export FIRST_USER_NAME=${FIRST_USER_NAME:-pi}
 export FIRST_USER_PASS=${FIRST_USER_PASS:-raspberry}
 export WPA_ESSID

stage1/02-net-tweaks/00-run.sh

@@ -1,5 +1,5 @@
 #!/bin/bash -e
 
-install -m 644 files/hostname "${ROOTFS_DIR}/etc/hostname"
+echo "${HOSTNAME}" > "${ROOTFS_DIR}/etc/hostname"
 
 ln -sf /dev/null "${ROOTFS_DIR}/etc/systemd/network/99-default.link"

stage1/02-net-tweaks/files/hostname

@@ -1 +0,0 @@
-raspberrypi