diff --git a/android/.gitignore b/android/.gitignore
new file mode 100644
index 0000000000..42ebff4fd6
--- /dev/null
+++ b/android/.gitignore
@@ -0,0 +1,4 @@
+out/
+prebuilts/tools/darwin-x86_64/bazel/
+prebuilts/tools/linux-x86_64/bazel/
+tools/external/gradle/gradle-api-3.5-20170307000048+0000.jar
diff --git a/android/device/softwinner/.gitignore b/android/device/softwinner/.gitignore
new file mode 100644
index 0000000000..890e5affae
--- /dev/null
+++ b/android/device/softwinner/.gitignore
@@ -0,0 +1,2 @@
+*/modules/
+*/kernel
diff --git a/android/device/softwinner/tulip-m64-hdmi/kernel b/android/device/softwinner/tulip-m64-hdmi/kernel
deleted file mode 100644
index 8ccca6a05a..0000000000
Binary files a/android/device/softwinner/tulip-m64-hdmi/kernel and /dev/null differ
diff --git a/android/device/softwinner/tulip-m64-hdmi/modules/modules.mk b/android/device/softwinner/tulip-m64-hdmi/modules/modules.mk
deleted file mode 100644
index 47b5990065..0000000000
--- a/android/device/softwinner/tulip-m64-hdmi/modules/modules.mk
+++ /dev/null
@@ -1,3 +0,0 @@
-# modules.mk generate by extract-files.sh, do not edit it.
-PRODUCT_COPY_FILES += \
-    $(call find-copy-subdir-files,*,$(LOCAL_PATH)/modules,$(TARGET_COPY_OUT_VENDOR)/modules)
diff --git a/android/device/softwinner/tulip-m64/kernel b/android/device/softwinner/tulip-m64/kernel
deleted file mode 100644
index cefce1d878..0000000000
Binary files a/android/device/softwinner/tulip-m64/kernel and /dev/null differ
diff --git a/android/device/softwinner/tulip-m64/modules/modules.mk b/android/device/softwinner/tulip-m64/modules/modules.mk
deleted file mode 100644
index 47b5990065..0000000000
--- a/android/device/softwinner/tulip-m64/modules/modules.mk
+++ /dev/null
@@ -1,3 +0,0 @@
-# modules.mk generate by extract-files.sh, do not edit it.
-PRODUCT_COPY_FILES += \
-    $(call find-copy-subdir-files,*,$(LOCAL_PATH)/modules,$(TARGET_COPY_OUT_VENDOR)/modules)
diff --git a/lichee/.gitignore b/lichee/.gitignore
new file mode 100644
index 0000000000..bcced84713
--- /dev/null
+++ b/lichee/.gitignore
@@ -0,0 +1,11 @@
+.buildconfig
+out/
+brandy/toolchain/
+tools/build/toolchain/
+tools/pack/out/
+tools/pack/*.img
+tools/product
+tools/pack/chips/sun50iw1p1/bin/u-boot-sun50iw1p1.bin
+buildroot/target/common/rootfs/sysroot.tar.gz
+buildroot/target/test/a1x-test.tar.gz
+buildroot/target/tools/host/usr/bin/mke2fs
diff --git a/lichee/bootloader/uboot_2014_sunxi_spl/.gitignore b/lichee/bootloader/uboot_2014_sunxi_spl/.gitignore
new file mode 100644
index 0000000000..758e6ed52c
--- /dev/null
+++ b/lichee/bootloader/uboot_2014_sunxi_spl/.gitignore
@@ -0,0 +1,8 @@
+*.o
+*.depend
+*.axf
+*.lds
+*.bin
+*.map
+*.log
+
diff --git a/lichee/brandy/u-boot-2014.07/.gitignore b/lichee/brandy/u-boot-2014.07/.gitignore
new file mode 100644
index 0000000000..0a41234d9f
--- /dev/null
+++ b/lichee/brandy/u-boot-2014.07/.gitignore
@@ -0,0 +1,32 @@
+cur.log
+*.o
+*.su
+*.o.cmd
+*.cmd
+*.bin
+*.srec
+*.depend
+
+System.map
+arch/arm/include/asm/arch
+arch/arm/lib/asm-offsets.s
+arch/arm/lib/lib.a
+examples/standalone/hello_world
+include/autoconf.mk
+include/autoconf.mk.dep
+include/config.h
+include/config.mk
+include/config/
+include/generated/
+lib/asm-offsets.s
+scripts/basic/fixdep
+tools/common/
+tools/dumpimage
+tools/lib/
+tools/mkenvimage
+tools/mkimage
+tools/mksunxiboot
+tools/proftool
+u-boot
+u-boot.lds
+u-boot.map
diff --git a/lichee/linux-4.9/.gitignore b/lichee/linux-4.9/.gitignore
new file mode 100644
index 0000000000..e8b3727864
--- /dev/null
+++ b/lichee/linux-4.9/.gitignore
@@ -0,0 +1,172 @@
+#
+# NOTE! Don't add files that are generated in specific
+# subdirectories here. Add them in the ".gitignore" file
+# in that subdirectory instead.
+#
+# NOTE! Please use 'git ls-files -i --exclude-standard'
+# command after changing this file, to see if there are
+# any tracked files which get ignored after the change.
+#
+# Normal rules
+#
+.*
+*.dtb
+*.o
+*.o.*
+*.a
+*.s
+*.ko
+*.so
+*.so.dbg
+*.mod.c
+*.i
+*.lst
+*.symtypes
+*.order
+*.elf
+*.bin
+*.tar
+*.gz
+*.bz2
+*.lzma
+*.xz
+*.lz4
+*.lzo
+*.patch
+*.gcno
+*.ll
+modules.builtin
+Module.symvers
+*.dwo
+*.su
+*.c.[012]*.*
+
+#
+# Top-level generic files
+#
+/tags
+/TAGS
+/linux
+/vmlinux
+/vmlinux.32
+/vmlinux-gdb.py
+/vmlinuz
+/System.map
+/Module.markers
+
+#
+# Debian directory (make deb-pkg)
+#
+/debian/
+
+#
+# tar directory (make tar*-pkg)
+#
+/tar-install/
+
+/output/
+
+#
+# git files that we don't want to ignore even if they are dot-files
+#
+!.gitignore
+!.mailmap
+!.cocciconfig
+
+#
+# Generated include files
+#
+include/config
+include/generated
+arch/*/include/generated
+
+# stgit generated dirs
+patches-*
+
+# quilt's files
+patches
+series
+
+# cscope files
+cscope.*
+ncscope.*
+
+# gnu global files
+GPATH
+GRTAGS
+GSYMS
+GTAGS
+
+# id-utils files
+ID
+
+*.orig
+*~
+\#*#
+
+#
+# Leavings from module signing
+#
+extra_certificates
+signing_key.pem
+signing_key.priv
+signing_key.x509
+x509.genkey
+
+# Kconfig presets
+all.config
+
+# Kdevelop4
+*.kdev4
+
+# fetched Android config fragments
+kernel/configs/android-*.cfg
+
+# m4 build
+arch/arm64/boot/Image
+arch/arm64/kernel/vdso/vdso.lds
+arch/arm64/kernel/vdso/vdso-offsets.h
+arch/arm64/kernel/vmlinux.lds
+usr/gen_init_cpio
+drivers/tty/vt/consolemap_deftbl.c
+drivers/tty/vt/defkeymap.c
+kernel/config_data.h
+kernel/debug/kdb/gen-kdb_cmds.c
+kernel/hz.bc
+kernel/timeconst.h
+lib/crc32table.h
+lib/gen_crc32table
+samples/hidraw/hid-example
+samples/seccomp/bpf-direct
+samples/seccomp/bpf-fancy
+samples/seccomp/dropper
+scripts/basic/bin2c
+scripts/basic/fixdep
+scripts/bin2c
+scripts/conmakehash
+scripts/dtc/dtc
+scripts/dtc/dtc-lexer.lex.c
+scripts/dtc/dtc-parser.tab.c
+scripts/dtc/dtc-parser.tab.h
+scripts/genksyms/genksyms
+scripts/genksyms/keywords.hash.c
+scripts/genksyms/lex.lex.c
+scripts/genksyms/parse.tab.c
+scripts/genksyms/parse.tab.h
+scripts/kallsyms
+scripts/kconfig/conf
+scripts/kconfig/mconf
+scripts/kconfig/zconf.hash.c
+scripts/kconfig/zconf.lex.c
+scripts/kconfig/zconf.tab.c
+scripts/mod/devicetable-offsets.h
+scripts/mod/elfconfig.h
+scripts/mod/mk_elfconfig
+scripts/mod/modpost
+scripts/recordmcount
+scripts/selinux/genheaders/genheaders
+scripts/selinux/mdp/mdp
+scripts/sortextable
+security/selinux/av_permissions.h
+security/selinux/flask.h
+usr/initramfs_data.cpio