Implement package for flashdrive image

Config.in

@@ -1,5 +1,6 @@
 source "$BR2_EXTERNAL_BUSINESSCARD_PATH/package/sunxi-tools-f1c100s/Config.in.host"
 source "$BR2_EXTERNAL_BUSINESSCARD_PATH/package/sunxi-tools-f1c100s/Config.in"
+source "$BR2_EXTERNAL_BUSINESSCARD_PATH/package/businesscard-flashdrive/Config.in"
 source "$BR2_EXTERNAL_BUSINESSCARD_PATH/package/2048/Config.in"
 source "$BR2_EXTERNAL_BUSINESSCARD_PATH/package/fortune-mod/Config.in"
 source "$BR2_EXTERNAL_BUSINESSCARD_PATH/package/robotfindskitten/Config.in"

board/businesscard/v1/genimage.cfg

@@ -20,28 +20,6 @@ image flash.bin {
 	}
 }
 
-image flashdrive.vfat {
-	vfat {
-		files = {
-			"George Hilliard resume.pdf",
-			"README.txt"
-		}
-	}
-	size = 64K
-}
-
-image flashdrive.img {
-	hdimage {}
-	partition businesscard {
-		partition-type = 0xc
-		image = "flashdrive.vfat"
-	}
-	// Hardcode a size here to help the ubi builder, which cannot infer a size
-	// of this image or wait until this image is built, due to the design of
-	// genimage.
-	size = 65K
-}
-
 image persist.ubifs {
 	ubifs {
 		extraargs = "--compr=zlib --jrn-size=192KiB --log-lebs=2"

configs/thirtythreeforty_businesscard_defconfig

@@ -59,11 +59,10 @@ BR2_TARGET_UBOOT_NEEDS_PYLIBFDT=y
 BR2_TARGET_UBOOT_FORMAT_CUSTOM=y
 BR2_TARGET_UBOOT_FORMAT_CUSTOM_NAME="u-boot-sunxi-with-spl.bin"
 BR2_TARGET_UBOOT_CUSTOM_DTS_PATH="$(BR2_EXTERNAL_BUSINESSCARD_PATH)/board/businesscard/v1/dts/*"
-BR2_PACKAGE_HOST_GENIMAGE=y
 BR2_PACKAGE_HOST_MKPASSWD=y
 BR2_PACKAGE_HOST_MTD=y
-BR2_PACKAGE_HOST_MTOOLS=y
 BR2_PACKAGE_HOST_SUNXI_TOOLS_F1C100S=y
+BR2_PACKAGE_BUSINESSCARD_FLASHDRIVE=y
 BR2_PACKAGE_2048=y
 BR2_PACKAGE_FORTUNE_MOD=y
 BR2_PACKAGE_FORTUNE_MOD_COOKIES="computers;humorists;linuxcookie;literature;pratchett;startrek;wisdom"

package/businesscard-flashdrive/Config.in

@@ -0,0 +1,11 @@
+config BR2_PACKAGE_BUSINESSCARD_FLASHDRIVE
+	bool "businesscard-flashdrive"
+	select BR2_PACKAGE_HOST_GENIMAGE
+	select BR2_PACKAGE_HOST_DOSFSTOOLS
+	select BR2_PACKAGE_HOST_MTOOLS
+	help
+	  The "flash drive" image that appears when you plug my business card into
+	  a PC.
+
+	  https://github.com/thirtythreeforty
+

package/businesscard-flashdrive/businesscard-flashdrive.mk

@@ -0,0 +1,33 @@
+################################################################################
+#
+# businesscard-flashdrive
+#
+################################################################################
+
+BUSINESSCARD_FLASHDRIVE_SITE = $(BUSINESSCARD_FLASHDRIVE_PKGDIR)files
+BUSINESSCARD_FLASHDRIVE_SITE_METHOD = local
+BUSINESSCARD_FLASHDRIVE_LICENSE = Proprietary
+BUSINESSCARD_FLASHDRIVE_DEPENDENCIES = host-genimage host-dosfstools host-mtools
+BUSINESSCARD_INSTALL_IMAGES = YES
+BUSINESSCARD_INSTALL_TARGET = NO
+
+define BUSINESSCARD_FLASHDRIVE_BUILD_CMDS
+	rm -rf "$(@D)/tmp"
+	mkdir -p $(@D)/dummyroot
+	$(HOST_DIR)/bin/genimage \
+		--config $(@D)/genimage.cfg \
+		--inputpath $(@D) \
+		--outputpath $(@D) \
+		--tmppath $(@D)/tmp \
+		--rootpath $(@D)/dummyroot \
+		--mcopy $(HOST_DIR)/bin/mcopy \
+		--mkdosfs $(HOST_DIR)/sbin/mkdosfs
+
+endef
+
+define BUSINESSCARD_FLASHDRIVE_INSTALL_TARGET_CMDS
+	mkdir -p $(BINARIES_DIR)
+	cp $(@D)/flashdrive.img $(BINARIES_DIR)/flashdrive.img
+endef
+
+$(eval $(generic-package))

package/businesscard-flashdrive/files/README.txt

@@ -0,0 +1,55 @@
+ABOUT ME
+
+I am an embedded systems engineer.  My specialty is designing software and
+hardware for small microcontrollers and especially small Linux devices like this
+business card.  I do this both professionally and as a hobby.  I am also fluent
+in several computer languages, and comfortable working on any level of the
+stack, from low-level drivers to cleanly-designed backend servers to smooth,
+fluid Android apps.
+
+I'm also a decent amateur photographer, vehicle mechanic, and cook.
+
+If you'd like to work with me on business or a cool project, please don't
+hesitate to reach out.  (You have my card!)
+
+ABOUT THIS CARD
+
+This is a small Linux computer running a custom-built Linux distribution.  It
+has a $1.40 system-on-a-chip with 32MB RAM and 8MB storage; everything runs in
+this very constrained environment.  It is configured to appear as a "USB
+gadget" -- a complete Linux device playing the role of a peripheral.
+
+In this case, the card emulates a very small flash drive.  This readme is on
+the flash drive alongside my resume and some of my photography (unfortunately
+not many photos will fit in the remaining space, but it is enough for a sample).
+
+The card also emulates a serial port.  You can use this to log into the card's
+Linux shell and run programs -- it is a complete computer.  On Windows, you can
+use PuTTY or similar to connect to the COM port (you may need to open Device
+Manager to discover which COM port number it has been assigned).  On Linux, you
+can use screen.  Try this example command:
+
+    sudo screen /dev/ttyUSB0
+
+You should get a "Welcome" message and a login prompt once you connect (if not,
+press Enter a few times).  The username is "root" and there is no password.
+
+The card's functionality is limited by the "business card" form factor, so I
+have mainly provided some amusements, as follows.  Type any of the commands to
+start them:
+
+    micropython  - a complete implementation of Python 3.4
+    rogue        - the original dungeon-crawling game (type Ctrl-C to quit)
+    fortune      - random, hopefully interesting, quips from a bunch of sources
+    2048         - the simple puzzle game
+
+The usual POSIX utilities such as vi and grep are present too.  And finally,
+there is a very small writable partition that will allow you to save your
+progress in rogue, or write small Python programs.
+
+This operating system is based on the Buildroot distribution, which I ported to
+the hardware which I designed.  All the parts for the card cost me about $3.
+You can get the source code at github.com/thirtythreeforty/businesscard-linux.
+
+Enjoy!
+-- George Hilliard

package/businesscard-flashdrive/files/genimage.cfg

@@ -0,0 +1,18 @@
+image flashdrive.vfat {
+	vfat {
+		files = {
+			"Photography",
+			"George Hilliard resume.pdf",
+			"README.txt"
+		}
+	}
+	size = 1728K
+}
+
+image flashdrive.img {
+	hdimage {}
+	partition businesscard {
+		partition-type = 0xc
+		image = "flashdrive.vfat"
+	}
+}