fs/common.mk

   1 #
   2 # Macro that builds the needed Makefile target to create a root
   3 # filesystem image.
   4 #
   5 # The following variable must be defined before calling this macro
   6 #
   7 #  ROOTFS_$(FSTYPE)_CMD, the command that generates the root
   8 #  filesystem image. A single command is allowed. The filename of the
   9 #  filesystem image that it must generate is $$@.
  10 #
  11 # The following variables can optionaly be defined
  12 #
  13 #  ROOTFS_$(FSTYPE)_DEPENDENCIES, the list of dependencies needed to
  14 #  build the root filesystem (usually host tools)
  15 #
  16 #  ROOTFS_$(FSTYPE)_PRE_GEN_HOOKS, a list of hooks to call before
  17 #  generating the filesystem image
  18 #
  19 #  ROOTFS_$(FSTYPE)_POST_GEN_HOOKS, a list of hooks to call after
  20 #  generating the filesystem image
  21 #
  22 # In terms of configuration option, this macro assumes that the
  23 # BR2_TARGET_ROOTFS_$(FSTYPE) config option allows to enable/disable
  24 # the generation of a filesystem image of a particular type. If
  25 # the configuration options BR2_TARGET_ROOTFS_$(FSTYPE)_GZIP,
  26 # BR2_TARGET_ROOTFS_$(FSTYPE)_BZIP2 or
  27 # BR2_TARGET_ROOTFS_$(FSTYPE)_LZMA exist and are enabled, then the
  28 # macro will automatically generate a compressed filesystem image.
  29
  30 FS_DIR = $(BUILD_DIR)/buildroot-fs
  31 FULL_DEVICE_TABLE = $(FS_DIR)/device_table.txt
  32 ROOTFS_DEVICE_TABLES = $(call qstrip,$(BR2_ROOTFS_DEVICE_TABLE) \
  33         $(BR2_ROOTFS_STATIC_DEVICE_TABLE))
  34 USERS_TABLE = $(FS_DIR)/users_table.txt
  35 ROOTFS_USERS_TABLES = $(call qstrip,$(BR2_ROOTFS_USERS_TABLES))
  36
  37 ifeq ($(BR2_REPRODUCIBLE),y)
  38 define ROOTFS_REPRODUCIBLE
  39         find $(TARGET_DIR) -print0 | xargs -0 -r touch -hd @$(SOURCE_DATE_EPOCH)
  40 endef
  41 endif
  42
  43 ROOTFS_COMMON_TAR = $(FS_DIR)/rootfs.common.tar
  44
  45 # Command to create the common tarball from the base target directory.
  46 define ROOTFS_COMMON_TAR_CMD
  47         tar cf $(ROOTFS_COMMON_TAR) --numeric-owner \
  48                 --exclude=$(notdir $(TARGET_DIR_WARNING_FILE)) \
  49                 -C $(TARGET_DIR) .
  50 endef
  51
  52 # Command to extract the common tarball into the per-rootfs target directory
  53 define ROOTFS_COMMON_UNTAR_CMD
  54         mkdir -p $(TARGET_DIR)
  55         tar xf $(ROOTFS_COMMON_TAR) -C $(TARGET_DIR)
  56 endef
  57
  58 .PHONY: rootfs-common
  59 rootfs-common: $(ROOTFS_COMMON_TAR)
  60
  61 # Emulate being in a filesystem, so that we can have our own TARGET_DIR.
  62 ROOTFS_COMMON_TARGET_DIR = $(FS_DIR)/target
  63
  64 ROOTFS_COMMON_DEPENDENCIES = \
  65         host-fakeroot host-makedevs \
  66         $(if $(PACKAGES_USERS)$(ROOTFS_USERS_TABLES),host-mkpasswd)
  67
  68 $(ROOTFS_COMMON_TAR): ROOTFS=COMMON
  69 $(ROOTFS_COMMON_TAR): FAKEROOT_SCRIPT=$(FS_DIR)/fakeroot.fs
  70 $(ROOTFS_COMMON_TAR): $(ROOTFS_COMMON_DEPENDENCIES) target-finalize
  71         @$(call MESSAGE,"Generating common rootfs tarball")
  72         rm -rf $(FS_DIR)
  73         mkdir -p $(FS_DIR)
  74         rsync -au $(BASE_TARGET_DIR)/ $(TARGET_DIR)
  75         echo '#!/bin/sh' > $(FAKEROOT_SCRIPT)
  76         echo "set -e" >> $(FAKEROOT_SCRIPT)
  77         echo "chown -h -R 0:0 $(TARGET_DIR)" >> $(FAKEROOT_SCRIPT)
  78 ifneq ($(ROOTFS_USERS_TABLES),)
  79         cat $(ROOTFS_USERS_TABLES) >> $(USERS_TABLE)
  80 endif
  81         $(call PRINTF,$(PACKAGES_USERS)) >> $(USERS_TABLE)
  82         PATH=$(BR_PATH) $(TOPDIR)/support/scripts/mkusers $(USERS_TABLE) $(TARGET_DIR) >> $(FAKEROOT_SCRIPT)
  83 ifneq ($(ROOTFS_DEVICE_TABLES),)
  84         cat $(ROOTFS_DEVICE_TABLES) > $(FULL_DEVICE_TABLE)
  85 ifeq ($(BR2_ROOTFS_DEVICE_CREATION_STATIC),y)
  86         $(call PRINTF,$(PACKAGES_DEVICES_TABLE)) >> $(FULL_DEVICE_TABLE)
  87 endif
  88 endif
  89         $(call PRINTF,$(PACKAGES_PERMISSIONS_TABLE)) >> $(FULL_DEVICE_TABLE)
  90         echo "$(HOST_DIR)/bin/makedevs -d $(FULL_DEVICE_TABLE) $(TARGET_DIR)" >> $(FAKEROOT_SCRIPT)
  91         $(foreach s,$(call qstrip,$(BR2_ROOTFS_POST_FAKEROOT_SCRIPT)),\
  92                 echo "echo '$(TERM_BOLD)>>>   Executing fakeroot script $(s)$(TERM_RESET)'" >> $(FAKEROOT_SCRIPT); \
  93                 echo $(EXTRA_ENV) $(s) $(TARGET_DIR) $(BR2_ROOTFS_POST_SCRIPT_ARGS) >> $(FAKEROOT_SCRIPT)$(sep))
  94         $(foreach hook,$(ROOTFS_PRE_CMD_HOOKS),\
  95                 $(call PRINTF,$($(hook))) >> $(FAKEROOT_SCRIPT)$(sep))
  96         $(call PRINTF,$(ROOTFS_COMMON_TAR_CMD)) >> $(FAKEROOT_SCRIPT)
  97         $(foreach hook,$(ROOTFS_POST_CMD_HOOKS),\
  98                 $(call PRINTF,$($(hook))) >> $(FAKEROOT_SCRIPT)$(sep))
  99         chmod a+x $(FAKEROOT_SCRIPT)
 100         PATH=$(BR_PATH) $(HOST_DIR)/bin/fakeroot -- $(FAKEROOT_SCRIPT)
 101
 102 rootfs-common-show-depends:
 103         @echo $(ROOTFS_COMMON_DEPENDENCIES)
 104
 105 # Since this function will be called from within an $(eval ...)
 106 # all variable references except the arguments must be $$-quoted.
 107 define inner-rootfs
 108
 109 ROOTFS_$(2)_DIR = $$(FS_DIR)/$(1)
 110 ROOTFS_$(2)_TARGET_DIR = $$(ROOTFS_$(2)_DIR)/target
 111
 112 ROOTFS_$(2)_DEPENDENCIES += rootfs-common
 113
 114 ifeq ($$(BR2_TARGET_ROOTFS_$(2)_GZIP),y)
 115 ROOTFS_$(2)_COMPRESS_EXT = .gz
 116 ROOTFS_$(2)_COMPRESS_CMD = gzip -9 -c
 117 endif
 118 ifeq ($$(BR2_TARGET_ROOTFS_$(2)_BZIP2),y)
 119 ROOTFS_$(2)_COMPRESS_EXT = .bz2
 120 ROOTFS_$(2)_COMPRESS_CMD = bzip2 -9 -c
 121 endif
 122 ifeq ($$(BR2_TARGET_ROOTFS_$(2)_LZMA),y)
 123 ROOTFS_$(2)_DEPENDENCIES += host-lzma
 124 ROOTFS_$(2)_COMPRESS_EXT = .lzma
 125 ROOTFS_$(2)_COMPRESS_CMD = $$(LZMA) -9 -c
 126 endif
 127 ifeq ($$(BR2_TARGET_ROOTFS_$(2)_LZ4),y)
 128 ROOTFS_$(2)_DEPENDENCIES += host-lz4
 129 ROOTFS_$(2)_COMPRESS_EXT = .lz4
 130 ROOTFS_$(2)_COMPRESS_CMD = lz4 -l -9 -c
 131 endif
 132 ifeq ($$(BR2_TARGET_ROOTFS_$(2)_LZO),y)
 133 ROOTFS_$(2)_DEPENDENCIES += host-lzop
 134 ROOTFS_$(2)_COMPRESS_EXT = .lzo
 135 ROOTFS_$(2)_COMPRESS_CMD = $$(LZOP) -9 -c
 136 endif
 137 ifeq ($$(BR2_TARGET_ROOTFS_$(2)_XZ),y)
 138 ROOTFS_$(2)_DEPENDENCIES += host-xz
 139 ROOTFS_$(2)_COMPRESS_EXT = .xz
 140 ROOTFS_$(2)_COMPRESS_CMD = xz -9 -C crc32 -c
 141 endif
 142
 143 $$(BINARIES_DIR)/rootfs.$(1): ROOTFS=$(2)
 144 $$(BINARIES_DIR)/rootfs.$(1): FAKEROOT_SCRIPT=$$(ROOTFS_$(2)_DIR)/fakeroot
 145 $$(BINARIES_DIR)/rootfs.$(1): $$(ROOTFS_$(2)_DEPENDENCIES)
 146         @$$(call MESSAGE,"Generating root filesystem image rootfs.$(1)")
 147         rm -rf $$(ROOTFS_$(2)_DIR)
 148         mkdir -p $$(ROOTFS_$(2)_DIR)
 149         echo '#!/bin/sh' > $$(FAKEROOT_SCRIPT)
 150         echo "set -e" >> $$(FAKEROOT_SCRIPT)
 151         $$(call PRINTF,$$(ROOTFS_COMMON_UNTAR_CMD)) >> $$(FAKEROOT_SCRIPT)
 152         $$(foreach hook,$$(ROOTFS_$(2)_PRE_GEN_HOOKS),\
 153                 $$(call PRINTF,$$($$(hook))) >> $$(FAKEROOT_SCRIPT)$$(sep))
 154         $$(call PRINTF,$$(ROOTFS_REPRODUCIBLE)) >> $$(FAKEROOT_SCRIPT)
 155         $$(call PRINTF,$$(ROOTFS_$(2)_CMD)) >> $$(FAKEROOT_SCRIPT)
 156         chmod a+x $$(FAKEROOT_SCRIPT)
 157         PATH=$$(BR_PATH) $$(HOST_DIR)/bin/fakeroot -- $$(FAKEROOT_SCRIPT)
 158 ifneq ($$(ROOTFS_$(2)_COMPRESS_CMD),)
 159         PATH=$$(BR_PATH) $$(ROOTFS_$(2)_COMPRESS_CMD) $$@ > $$@$$(ROOTFS_$(2)_COMPRESS_EXT)
 160 endif
 161         $$(foreach hook,$$(ROOTFS_$(2)_POST_GEN_HOOKS),$$(call $$(hook))$$(sep))
 162
 163 rootfs-$(1)-show-depends:
 164         @echo $$(ROOTFS_$(2)_DEPENDENCIES)
 165
 166 rootfs-$(1): $$(BINARIES_DIR)/rootfs.$(1)
 167
 168 .PHONY: rootfs-$(1) rootfs-$(1)-show-depends
 169
 170 ifeq ($$(BR2_TARGET_ROOTFS_$(2)),y)
 171 TARGETS_ROOTFS += rootfs-$(1)
 172 PACKAGES += $$(filter-out rootfs-%,$$(ROOTFS_$(2)_DEPENDENCIES))
 173 endif
 174
 175 # Check for legacy POST_TARGETS rules
 176 ifneq ($$(ROOTFS_$(2)_POST_TARGETS),)
 177 $$(error Filesystem $(1) uses post-target rules, which are no longer supported.\
 178         Update $(1) to use post-gen hooks instead)
 179 endif
 180
 181 endef
 182
 183 # $(pkgname) also works well to return the filesystem name
 184 rootfs = $(call inner-rootfs,$(pkgname),$(call UPPERCASE,$(pkgname)))
 185
 186 include $(sort $(wildcard fs/*/*.mk))