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core: add per-package and per-filesystem show-info

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Sometimes, it is need to quickly get the metadata of a subset of
packages, without resorting to a full-blown JSON query.

Introduce a new per-package (and per-filesystem) foo-show-info rule,
that otputs a per-entity valid JSON blob.

Note that calling it for multiple packages and.or filesystems at once
will not generate a valid JSON blob, as there would be no separator
between the JSON elements:

    $ make {foo,bar}-show-info
    { "foo": { foo stuff } }
    { "bar": { bar stuff } }

However, jq is able to absorb this, with its slurping ability, which
generates an array (ellipsed and manualy reformated for readability):

    $ make {foo,bar}-show-info |jq -s . -
    [
      { "foo": { foo stuff } },
      { "bar": { bar stuff } }
    ]

Signed-off-by: "Yann E. MORIN" <yann.morin.1998@free.fr>
Cc: Thomas Petazzoni <thomas.petazzoni@bootlin.com>
Cc: Thomas De Schampheleire <patrickdepinguin@gmail.com>
Cc: Arnout Vandecappelle <arnout@mind.be>
Signed-off-by: Arnout Vandecappelle (Essensium/Mind) <arnout@mind.be>
This commit is contained in:
Yann E. MORIN 2019-04-15 21:47:32 +02:00 committed by Arnout Vandecappelle (Essensium/Mind)
parent f8177b7813
commit 5abb88218e
3 changed files with 16 additions and 1 deletions
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1
Makefile
View File

@ -1111,6 +1111,7 @@ help:
@echo ' <pkg>-depends - Build <pkg>'\''s dependencies'
@echo ' <pkg>-configure - Build <pkg> up to the configure step'
@echo ' <pkg>-build - Build <pkg> up to the build step'
@echo ' <pkg>-show-info - generate info about <pkg>, as a JSON blurb'
@echo ' <pkg>-show-depends - List packages on which <pkg> depends'
@echo ' <pkg>-show-rdepends - List packages which have <pkg> as a dependency'
@echo ' <pkg>-show-recursive-depends'

11
fs/common.mk
View File

@ -87,6 +87,11 @@ endif
rootfs-common-show-depends:
@echo $(ROOTFS_COMMON_DEPENDENCIES)
.PHONY: rootfs-common-show-info
rootfs-common-show-info:
@:
$(info $(call clean-json,{ $(call json-info,ROOTFS_COMMON) }))
# Since this function will be called from within an $(eval ...)
# all variable references except the arguments must be $$-quoted.
define inner-rootfs
@ -184,9 +189,13 @@ endif
rootfs-$(1)-show-depends:
@echo $$(ROOTFS_$(2)_DEPENDENCIES)
rootfs-$(1)-show-info:
@:
$$(info $$(call clean-json,{ $$(call json-info,ROOTFS_$(2)) }))
rootfs-$(1): $$(BINARIES_DIR)/$$(ROOTFS_$(2)_FINAL_IMAGE_NAME)
.PHONY: rootfs-$(1) rootfs-$(1)-show-depends
.PHONY: rootfs-$(1) rootfs-$(1)-show-depends rootfs-$(1)-show-info
ifeq ($$(BR2_TARGET_ROOTFS_$(2)),y)
TARGETS_ROOTFS += rootfs-$(1)

5
package/pkg-generic.mk
View File

@ -867,6 +867,10 @@ $(1)-show-dependency-tree: $$(patsubst %,%-show-dependency-tree,$$($(2)_FINAL_AL
$$(info $(1): $(4) $$(if $$($(2)_IS_VIRTUAL),virtual,$$($(2)_DL_VERSION)))
$$(info $(1) -> $$($(2)_FINAL_ALL_DEPENDENCIES))
$(1)-show-info:
@:
$$(info $$(call clean-json,{ $$(call json-info,$(2)) }))
$(1)-graph-depends: graph-depends-requirements
$(call pkg-graph-depends,$(1),--direct)
@ -1099,6 +1103,7 @@ DL_TOOLS_DEPENDENCIES += $$(call extractor-dependency,$$($(2)_SOURCE))
$(1)-rsync \
$(1)-show-dependency-tree \
$(1)-show-depends \
$(1)-show-info \
$(1)-show-version \
$(1)-source