debian/backports/rules

   1 .PHONY: backports $(KNOWN_BACKPORTS)
   2
   3 # error out if these files are missing
   4 required_files = $(foreach backport,$(KNOWN_BACKPORTS), \
   5         $(addprefix debian/backports/$(backport)/, \
   6                 debian/source/format \
   7                 versionext \
   8                 exclude))
   9 $(if $(filter-out $(wildcard $(required_files)),$(required_files)), \
  10         $(error missing required backports files: \
  11                 $(filter-out $(wildcard $(required_files)),$(required_files)). \
  12                 see debian/backports/README) \
  13 )
  14
  15 TARBALLDIR ?= $(shell dh_testdir debian/changelog && realpath .)
  16
  17 define backports-targets
  18 # if this file is empty, no automatic changelog entry is created
  19 VERSIONEXT_$(1) ?= $(strip \
  20         $(shell cat $(wildcard debian/backports/$(1)/versionext)))
  21 DEBIAN_VERSION_$(1) = $(DEBIAN_VERSION)$$(VERSIONEXT_$(1))
  22 BACKPORTDIR_$(1) = $(realpath debian/backports/$(1))
  23
  24 # as of right now, must be '3.0 (quilt)'
  25 SOURCEFORMAT_$(1) ?= $(strip \
  26         $(shell cat debian/backports/$(1)/debian/source/format))
  27
  28 # files checked for the dirhash (see below)
  29 FINDCMD_$(1) = find -L debian/backports/$(1)/debian \
  30         -type f \
  31         ! -path debian/backports/$(1)/debian/changelog
  32
  33 # files *not* pulled from the root debian directory into the backport tarball:
  34 # debian/changelog (copied and edited for backport version entry)
  35 # debian/backports itself (relevant contents are copied out separately)
  36 # anything provided in the current backports debian dir
  37 # anything specified in the 'exclude' file in the current backports debian dir
  38 EXCLUDEROOT_$(1) = debian/changelog debian/backports \
  39         $$(subst debian/backports/$(1)/,,$$(shell $$(FINDCMD_$(1)))) \
  40         $$(shell cat debian/backports/$(1)/exclude)
  41
  42 EXCLUDEROOT_TAR_$(1) = $$(foreach file,$$(EXCLUDEROOT_$(1)),--exclude $$(file))
  43 EXCLUDEROOT_FIND_$(1) = $$(foreach file,$$(EXCLUDEROOT_$(1)),-o -path $$(file))
  44
  45 # find command resulting in all files that *will* be pulled into the backport
  46 # tarball.
  47 FINDCMDROOT_$(1) = find -L debian/ \
  48         '(' -false $$(EXCLUDEROOT_FIND_$(1)) ')' -prune -o \
  49         -type f -a '!' '(' -false $$(EXCLUDEROOT_FIND_$(1)) ')'
  50
  51 # usually using `find' output for dependencies has the downfall of not tracking
  52 # file removal. Work around that by introducing a dependency on a file whose
  53 # name contains the hash of `find' output, so that the name will change when a
  54 # file is deleted.
  55 DIRHASH_$(1) = \
  56         $$(shell $$(FINDCMD_$(1)) | sha1sum | sed -r 's/^(......).*/\1/')
  57 DIRHASHROOT_$(1) = \
  58         $$(shell $$(FINDCMDROOT_$(1)) | sha1sum | sed -r 's/^(......).*/\1/')
  59
  60 CONTROL_$(1) = $$(strip \
  61         $$(if $$(wildcard $$(BACKPORTDIR_$(1))/debian/control), \
  62                 $$(BACKPORTDIR_$(1))/debian/control, \
  63                 $(realpath debian/control) \
  64         ))
  65
  66 # TARGETS:
  67
  68 $(1): $(TARBALLDIR)/$(SRCPKG)_$$(DEBIAN_VERSION_$(1)).dsc ;
  69
  70 # we use 3.0 (custom) to build a source package directly from tarballs,
  71 # bypassing the usual checks (which wouldn't like our combination-of-
  72 # directories approach)
  73 $(TARBALLDIR)/$(SRCPKG)_$$(DEBIAN_VERSION_$(1)).dsc:
  74         # -b directory does nothing but determine will the .dsc will end up
  75         # for the custom source format. Put it in the current directory by
  76         # specifying one of its subdirs.
  77         dpkg-source -l$$(BACKPORTDIR_$(1))/debian/changelog \
  78                 -c$$(CONTROL_$(1)) \
  79                 --format='3.0 (custom)' \
  80                 --target-format='$$(SOURCEFORMAT_$(1))' \
  81                 -b debian $$^
  82
  83 ifeq ($$(SOURCEFORMAT_$(1)),3.0 (quilt))
  84 # this target depends on the orig.tar.gz file, for which there is no target in
  85 # this makefile. It is assumed to either already exist or be built by a target
  86 # provided elsewhere in debian/rules (e.g. via pristine-tar)
  87 $(TARBALLDIR)/$(SRCPKG)_$$(DEBIAN_VERSION_$(1)).dsc: \
  88                 $(TARBALLDIR)/$(SRCPKG)_$(ORIG_VERSION).orig.tar.gz \
  89                 $(TARBALLDIR)/$(SRCPKG)_$$(DEBIAN_VERSION_$(1)).debian.tar.xz
  90 else
  91 $$(error unsupported source format for $(1) backport: $$(SOURCEFORMAT_$(1)))
  92 endif #SOURCEFORMAT_$(1)
  93
  94 # for 3.0 (quilt)
  95 $(TARBALLDIR)/$(SRCPKG)_$$(DEBIAN_VERSION_$(1)).debian.tar.xz: \
  96                 $$(BACKPORTDIR_$(1))/debian/changelog \
  97                 $$(shell $$(FINDCMD_$(1))) \
  98                 $$(BACKPORTDIR_$(1))/$$(DIRHASH_$(1)).backport.dirhash \
  99                 $$(shell $$(FINDCMDROOT_$(1))) \
 100                 $$(BACKPORTDIR_$(1))/$$(DIRHASHROOT_$(1)).root.dirhash \
 101                 $$(BACKPORTDIR_$(1))/exclude
 102         rm -f $$(subst .tar.xz,.tar,$$@) $$@
 103         tar -chf $$(subst .tar.xz,.tar,$$@) \
 104                 --exclude-vcs $$(EXCLUDEROOT_TAR_$(1)) debian/
 105         cd debian/backports/$(1) && tar -uhf $$(subst .tar.xz,.tar,$$@) \
 106                 --exclude-vcs debian/
 107         xz $$(subst .tar.xz,.tar,$$@)
 108
 109 $$(BACKPORTDIR_$(1))/debian/changelog: \
 110                 debian/changelog \
 111                 debian/backports/$(1)/versionext
 112         rm -f debian/backports/$(1)/debian/changelog
 113         cp $$< $$@
 114         $(if $$(VERSIONEXT_$(1)), \
 115                 dch -c $$@ -v '$$(DEBIAN_VERSION_$(1))' -b \
 116                         'backport to $(1) systems', \
 117         )
 118
 119 $$(BACKPORTDIR_$(1))/$$(DIRHASH_$(1)).backport.dirhash:
 120         rm -f debian/backports/$(1)/*.backport.dirhash
 121         touch $$@
 122
 123 $$(BACKPORTDIR_$(1))/$$(DIRHASHROOT_$(1)).root.dirhash:
 124         rm -f debian/backports/$(1)/*.root.dirhash
 125         touch $$@
 126
 127 endef # backports-targets
 128 $(foreach backport,$(KNOWN_BACKPORTS),$(eval \
 129         $(call backports-targets,$(backport))))
 130
 131 backports: $(KNOWN_BACKPORTS)