2e9d6565fc
BSD style locks such as implemented by flock are translated to POSIX advisory file locks (implemented by the fcntl system call on Linux). It is not possible to lock a directory using POSIX advisory file locks. Hence, the lock strategy used by Buildroot doesn't work when used over NFS. Using flock on a simple file works correctly though, so use a '.lock' file inside the download directory instead. If the lockfile does not exist, flock will create it (in a race-free fashion). Tested using NFS v4.2 and Linux 5.4.43. Signed-off-by: Maxim Cournoyer <maxim.cournoyer@savoirfairelinux.com> [yann.morin.1998@free.fr: - slightly expand commit log about creation of the lockfile ] Signed-off-by: Yann E. MORIN <yann.morin.1998@free.fr>
117 lines
4.2 KiB
Makefile
117 lines
4.2 KiB
Makefile
################################################################################
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#
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# This file contains the download helpers for the various package
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# infrastructures. It is used to handle downloads from HTTP servers,
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# FTP servers, Git repositories, Subversion repositories, Mercurial
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# repositories, Bazaar repositories, and SCP servers.
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#
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################################################################################
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# Download method commands
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export WGET := $(call qstrip,$(BR2_WGET))
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export SVN := $(call qstrip,$(BR2_SVN))
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export CVS := $(call qstrip,$(BR2_CVS))
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export BZR := $(call qstrip,$(BR2_BZR))
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export GIT := $(call qstrip,$(BR2_GIT))
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export HG := $(call qstrip,$(BR2_HG))
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export SCP := $(call qstrip,$(BR2_SCP))
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export LOCALFILES := $(call qstrip,$(BR2_LOCALFILES))
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DL_WRAPPER = support/download/dl-wrapper
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# DL_DIR may have been set already from the environment
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ifeq ($(origin DL_DIR),undefined)
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DL_DIR ?= $(call qstrip,$(BR2_DL_DIR))
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ifeq ($(DL_DIR),)
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DL_DIR := $(TOPDIR)/dl
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endif
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else
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# Restore the BR2_DL_DIR that was overridden by the .config file
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BR2_DL_DIR = $(DL_DIR)
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endif
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# ensure it exists and a absolute path, derefrecing symlinks
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DL_DIR := $(shell mkdir -p $(DL_DIR) && cd $(DL_DIR) >/dev/null && pwd -P)
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#
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# URI scheme helper functions
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# Example URIs:
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# * http://www.example.com/dir/file
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# * scp://www.example.com:dir/file (with domainseparator :)
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#
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# geturischeme: http
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geturischeme = $(firstword $(subst ://, ,$(call qstrip,$(1))))
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# getschemeplusuri: git|parameter+http://example.com
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getschemeplusuri = $(call geturischeme,$(1))$(if $(2),\|$(2))+$(1)
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# stripurischeme: www.example.com/dir/file
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stripurischeme = $(lastword $(subst ://, ,$(call qstrip,$(1))))
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# domain: www.example.com
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domain = $(firstword $(subst $(call domainseparator,$(2)), ,$(call stripurischeme,$(1))))
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# notdomain: dir/file
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notdomain = $(patsubst $(call domain,$(1),$(2))$(call domainseparator,$(2))%,%,$(call stripurischeme,$(1)))
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#
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# default domainseparator is /, specify alternative value as first argument
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domainseparator = $(if $(1),$(1),/)
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# github(user,package,version): returns site of GitHub repository
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github = https://github.com/$(1)/$(2)/archive/$(3)
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# Expressly do not check hashes for those files
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# Exported variables default to immediately expanded in some versions of
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# make, but we need it to be recursively-epxanded, so explicitly assign it.
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export BR_NO_CHECK_HASH_FOR =
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################################################################################
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# DOWNLOAD_URIS - List the candidates URIs where to get the package from:
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# 1) BR2_PRIMARY_SITE if enabled
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# 2) Download site, unless BR2_PRIMARY_SITE_ONLY is set
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# 3) BR2_BACKUP_SITE if enabled, unless BR2_PRIMARY_SITE_ONLY is set
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#
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# Argument 1 is the source location
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# Argument 2 is the upper-case package name
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#
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################################################################################
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ifneq ($(call qstrip,$(BR2_PRIMARY_SITE)),)
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DOWNLOAD_URIS += \
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$(call getschemeplusuri,$(call qstrip,$(BR2_PRIMARY_SITE)/$($(2)_DL_SUBDIR)),urlencode) \
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$(call getschemeplusuri,$(call qstrip,$(BR2_PRIMARY_SITE)),urlencode)
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endif
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ifeq ($(BR2_PRIMARY_SITE_ONLY),)
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DOWNLOAD_URIS += \
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$(patsubst %/,%,$(dir $(call qstrip,$(1))))
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ifneq ($(call qstrip,$(BR2_BACKUP_SITE)),)
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DOWNLOAD_URIS += \
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$(call getschemeplusuri,$(call qstrip,$(BR2_BACKUP_SITE)/$($(2)_DL_SUBDIR)),urlencode) \
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$(call getschemeplusuri,$(call qstrip,$(BR2_BACKUP_SITE)),urlencode)
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endif
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endif
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################################################################################
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# DOWNLOAD -- Download helper. Will call DL_WRAPPER which will try to download
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# source from the list returned by DOWNLOAD_URIS.
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#
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# Argument 1 is the source location
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# Argument 2 is the upper-case package name
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#
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################################################################################
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define DOWNLOAD
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$(Q)mkdir -p $($(2)_DL_DIR)
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$(Q)$(EXTRA_ENV) flock $($(2)_DL_DIR)/.lock $(DL_WRAPPER) \
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-c '$($(2)_DL_VERSION)' \
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-d '$($(2)_DL_DIR)' \
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-D '$(DL_DIR)' \
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-f '$(notdir $(1))' \
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-H '$($(2)_HASH_FILE)' \
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-n '$($(2)_BASENAME_RAW)' \
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-N '$($(2)_RAWNAME)' \
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-o '$($(2)_DL_DIR)/$(notdir $(1))' \
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$(if $($(2)_GIT_SUBMODULES),-r) \
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$(foreach uri,$(call DOWNLOAD_URIS,$(1),$(2)),-u $(uri)) \
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$(QUIET) \
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-- \
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$($(2)_DL_OPTS)
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endef
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