build: implement make check and make package/X/check

This is intended to be used for a wide array of package sanity checks.

The first check that is implemented is for the hash of downloaded files.
It checks:
  - Missing hash
  - Use of SHA256 instead of MD5
  - dl/<file> hash not matching hash in makefile
  - deprecated MD5SUM variable

The deprecated MD5SUM variable check is skipped for feeds/ until OpenWrt
is updated as well

Signed-off-by: Felix Fietkau <nbd@nbd.name>

6 files changed, 91 insertions, 22 deletions

diff --git a/include/download.mk b/include/download.mk
index 095311bfbd..a9e8a0e2ff 100644
--- a/include/download.mk
+++ b/include/download.mk
@@ -44,20 +44,66 @@ define dl_tar_pack
 	$(TAR) --numeric-owner --owner=0 --group=0 --sort=name $$$${TAR_TIMESTAMP:+--mtime="$$$$TAR_TIMESTAMP"} -c $(2) | $(call dl_pack,$(1))
 endef
 
+ifdef CHECK
+check_escape=$(subst ','\'',$(1))
+#')
+check_warn = $(info $(shell printf "$(_R)WARNING: %s$(_N)" '$(call check_escape,$(call C_$(1),$(2),$(3),$(4)))'))
+gen_sha256sum = $(shell openssl dgst -sha256 $(DL_DIR)/$(1) | awk '{print $$2}')
+
+C_download_missing = $(1) is missing, please run make download before re-running this check
+C_hash_mismatch = $(3) does not match $(1) hash $(call gen_sha256sum,$(1))
+C_hash_deprecated = $(3) uses deprecated hash, set to $(call gen_sha256sum,$(1))
+C_hash_missing = $(3) is missing, set to $(call gen_sha256sum,$(1))
+
+check_hash = \
+  $(if $(wildcard $(DL_DIR)/$(1)), \
+    $(if $(filter-out x,$(2)), \
+      $(if $(filter 64,$(shell printf '%s' '$(2)' | wc -c)), \
+        $(if $(filter $(2),$(call gen_sha256sum,$(1))),, \
+          $(call check_warn,hash_mismatch,$(1),$(2),$(3)) \
+        ), \
+        $(call check_warn,hash_deprecated,$(1),$(2),$(3)), \
+      ), \
+      $(call check_warn,hash_missing,$(1),$(2),$(3)) \
+    ), \
+    $(call check_warn,download_missing,$(1),$(2),$(3)) \
+  )
+
+C_md5_deprecated = Use of $(2) is deprecated, switch to $(3)
+
+# Skip MD5SUM check in feeds until OpenWrt is updated
+ifneq ($(filter $(foreach dir,package tools toolchain, $(TOPDIR)/$(dir)/%),$(CURDIR)),)
+check_md5 = \
+  $(if $(filter-out x,$(1)), \
+    $(call check_warn,md5_deprecated,$(1),$(2),$(3)) \
+  )
+endif
+
+hash_var = $(if $(filter-out x,$(1)),MD5SUM,HASH)
+endif
+
 define DownloadMethod/unknown
 	@echo "ERROR: No download method available"; false
 endef
 
 define DownloadMethod/default
-	$(SCRIPT_DIR)/download.pl "$(DL_DIR)" "$(FILE)" "$(HASH)" "$(URL_FILE)" $(foreach url,$(URL),"$(url)")
+	$(SCRIPT_DIR)/download.pl "$(DL_DIR)" "$(FILE)" "$(HASH)" "$(URL_FILE)" $(foreach url,$(URL),"$(url)") \
+	$(if $(filter check,$(1)), \
+		$(call check_hash,$(FILE),$(HASH),$(2)$(call hash_var,$(MD5SUM))) \
+		$(call check_md5,$(MD5SUM),$(2)MD5SUM,$(2)HASH) \
+	)
 endef
 
 define wrap_mirror
-$(if $(if $(MIRROR),$(filter-out x,$(MIRROR_HASH))),$(SCRIPT_DIR)/download.pl "$(DL_DIR)" "$(FILE)" "$(MIRROR_HASH)" "" || ( $(1) ),$(1))
+$(if $(if $(MIRROR),$(filter-out x,$(MIRROR_HASH))),$(SCRIPT_DIR)/download.pl "$(DL_DIR)" "$(FILE)" "$(MIRROR_HASH)" "" || ( $(3) ),$(3)) \
+$(if $(filter check,$(1)), \
+	$(call check_hash,$(FILE),$(MIRROR_HASH),$(2)MIRROR_$(call hash_var,$(MIRROR_MD5SUM))) \
+	$(call check_md5,$(MIRROR_MD5SUM),$(2)MIRROR_MD5SUM,$(2)MIRROR_HASH) \
+)
 endef
 
 define DownloadMethod/cvs
-	$(call wrap_mirror, \
+	$(call wrap_mirror,$(1),$(2), \
 		echo "Checking out files from the cvs repository..."; \
 		mkdir -p $(TMP_DIR)/dl && \
 		cd $(TMP_DIR)/dl && \
@@ -72,7 +118,7 @@ define DownloadMethod/cvs
 endef
 
 define DownloadMethod/svn
-	$(call wrap_mirror, \
+	$(call wrap_mirror,$(1),$(2), \
 		echo "Checking out files from the svn repository..."; \
 		mkdir -p $(TMP_DIR)/dl && \
 		cd $(TMP_DIR)/dl && \
@@ -90,7 +136,7 @@ define DownloadMethod/svn
 endef
 
 define DownloadMethod/git
-	$(call wrap_mirror, \
+	$(call wrap_mirror,$(1),$(2), \
 		echo "Checking out files from the git repository..."; \
 		mkdir -p $(TMP_DIR)/dl && \
 		cd $(TMP_DIR)/dl && \
@@ -109,7 +155,7 @@ define DownloadMethod/git
 endef
 
 define DownloadMethod/bzr
-	$(call wrap_mirror, \
+	$(call wrap_mirror,$(1),$(2), \
 		echo "Checking out files from the bzr repository..."; \
 		mkdir -p $(TMP_DIR)/dl && \
 		cd $(TMP_DIR)/dl && \
@@ -125,7 +171,7 @@ define DownloadMethod/bzr
 endef
 
 define DownloadMethod/hg
-	$(call wrap_mirror, \
+	$(call wrap_mirror,$(1),$(2), \
 		echo "Checking out files from the hg repository..."; \
 		mkdir -p $(TMP_DIR)/dl && \
 		cd $(TMP_DIR)/dl && \
@@ -142,7 +188,7 @@ define DownloadMethod/hg
 endef
 
 define DownloadMethod/darcs
-	$(call wrap_mirror, \
+	$(call wrap_mirror, $(1), $(2), \
 		echo "Checking out files from the darcs repository..."; \
 		mkdir -p $(TMP_DIR)/dl && \
 		cd $(TMP_DIR)/dl && \
@@ -209,6 +255,11 @@ define Download
 
   $(DL_DIR)/$(FILE):
 	mkdir -p $(DL_DIR)
-	$(call locked,$(if $(DownloadMethod/$(call dl_method,$(URL),$(PROTO))),$(DownloadMethod/$(call dl_method,$(URL),$(PROTO))),$(DownloadMethod/unknown)),$(FILE))
+	$(call locked, \
+		$(if $(DownloadMethod/$(call dl_method,$(URL),$(PROTO))), \
+			$(call DownloadMethod/$(call dl_method,$(URL),$(PROTO)),check,$(if $(filter default,$(1)),PKG_,Download/$(1):)), \
+			$(DownloadMethod/unknown) \
+		),\
+		$(FILE))
 
 endef
diff --git a/include/host-build.mk b/include/host-build.mk
index 1ba849f88d..e11e3edd09 100644
--- a/include/host-build.mk
+++ b/include/host-build.mk
@@ -136,9 +136,8 @@ Host/Exports=$(Host/Exports/Default)
 .NOTPARALLEL:
 
 ifndef DUMP
-  define HostBuild
+  define HostBuild/Core
   $(if $(HOST_QUILT),$(Host/Quilt))
-  $(if $(if $(PKG_HOST_ONLY),,$(STAMP_PREPARED)),,$(if $(strip $(PKG_SOURCE_URL)),$(call Download,default)))
   $(if $(DUMP),,$(call HostHost/Autoclean))
 
   $(HOST_STAMP_PREPARED):
@@ -198,3 +197,8 @@ ifndef DUMP
   clean:
 
 endif
+
+define HostBuild
+  $(HostBuild/Core)
+  $(if $(if $(PKG_HOST_ONLY),,$(STAMP_PREPARED)),,$(if $(strip $(PKG_SOURCE_URL)),$(call Download,default)))
+endef
diff --git a/include/kernel.mk b/include/kernel.mk
index 2721c83d8e..4e66c0c76f 100644
--- a/include/kernel.mk
+++ b/include/kernel.mk
@@ -5,8 +5,15 @@
 # See /LICENSE for more information.
 #
 
+ifneq ($(filter check,$(MAKECMDGOALS)),)
+CHECK:=1
+DUMP:=1
+endif
+
 ifeq ($(__target_inc),)
-  include $(INCLUDE_DIR)/target.mk
+  ifndef CHECK
+    include $(INCLUDE_DIR)/target.mk
+  endif
 endif
 
 ifeq ($(DUMP),1)
diff --git a/include/package.mk b/include/package.mk
index 26fc30c7ec..f51232f503 100644
--- a/include/package.mk
+++ b/include/package.mk
@@ -7,7 +7,7 @@
 
 __package_mk:=1
 
-all: $(if $(DUMP),dumpinfo,compile)
+all: $(if $(DUMP),dumpinfo,$(if $(CHECK),check,compile))
 
 PKG_BUILD_DIR ?= $(BUILD_DIR)/$(PKG_NAME)$(if $(PKG_VERSION),-$(PKG_VERSION))
 PKG_INSTALL_DIR ?= $(PKG_BUILD_DIR)/ipkg-install
@@ -144,9 +144,8 @@ define Build/Exports/Default
 endef
 Build/Exports=$(Build/Exports/Default)
 
-define Build/DefaultTargets
+define Build/CoreTargets
   $(if $(QUILT),$(Build/Quilt))
-  $(if $(USE_SOURCE_DIR)$(USE_GIT_TREE),,$(if $(strip $(PKG_SOURCE_URL)),$(call Download,default)))
   $(call Build/Autoclean)
 
   download:
@@ -211,15 +210,20 @@ define Build/DefaultTargets
     compile: $(STAMP_INSTALLED)
   endif
 
-  define Build/DefaultTargets
-  endef
-
   prepare: $(STAMP_PREPARED)
   configure: $(STAMP_CONFIGURED)
   dist: $(STAMP_CONFIGURED)
   distcheck: $(STAMP_CONFIGURED)
 endef
 
+define Build/DefaultTargets
+  $(if $(USE_SOURCE_DIR)$(USE_GIT_TREE),,$(if $(strip $(PKG_SOURCE_URL)),$(call Download,default)))
+  $(if $(DUMP),,$(Build/CoreTargets))
+
+  define Build/DefaultTargets
+  endef
+endef
+
 define Build/IncludeOverlay
   $(eval -include $(wildcard $(TOPDIR)/overlay/*/$(PKG_DIR_NAME).mk))
   define Build/IncludeOverlay
@@ -251,14 +255,14 @@ endif
   )
 
   $(if $(DUMP), \
-    $(Dumpinfo/Package), \
+    $(if $(CHECK),,$(Dumpinfo/Package)), \
     $(foreach target, \
       $(if $(Package/$(1)/targets),$(Package/$(1)/targets), \
         $(if $(PKG_TARGETS),$(PKG_TARGETS), ipkg) \
       ), $(BuildTarget/$(target)) \
     ) \
   )
-  $(if $(PKG_HOST_ONLY)$(DUMP),,$(call Build/DefaultTargets,$(1)))
+  $(if $(PKG_HOST_ONLY),,$(call Build/DefaultTargets,$(1)))
 endef
 
 define pkg_install_files
@@ -286,7 +290,7 @@ prepare-package-install:
 
 $(PACKAGE_DIR):
 	mkdir -p $@
-	
+
 dumpinfo:
 download:
 prepare:
diff --git a/include/subdir.mk b/include/subdir.mk
index f4085f9df4..10476d3476 100644
--- a/include/subdir.mk
+++ b/include/subdir.mk
@@ -9,7 +9,7 @@ ifeq ($(MAKECMDGOALS),prereq)
   SUBTARGETS:=prereq
   PREREQ_ONLY:=1
 else
-  SUBTARGETS:=clean download prepare compile install update refresh prereq dist distcheck configure
+  SUBTARGETS:=clean download prepare compile install update refresh prereq dist distcheck configure check
 endif
 
 subtarget-default = $(filter-out ., \
diff --git a/include/toplevel.mk b/include/toplevel.mk
index f31884d3fe..5e99df8d9e 100644
--- a/include/toplevel.mk
+++ b/include/toplevel.mk
@@ -179,6 +179,9 @@ clean dirclean: .config
 prereq:: prepare-tmpinfo .config
 	@+$(NO_TRACE_MAKE) -r -s $@
 
+check: .config FORCE
+	@+$(NO_TRACE_MAKE) -r -s $@ QUIET= V=s
+
 WARN_PARALLEL_ERROR = $(if $(BUILD_LOG),,$(and $(filter -j,$(MAKEFLAGS)),$(findstring s,$(OPENWRT_VERBOSE))))
 
 ifeq ($(SDK),1)