package/pkg-utils: generate proper JSON strings where they are emitted

Currently, our clean-json macro does two things:
  - remove excessive commas before a closing list or dictionary;
  - escape the backslash.

We are going to need the comma-drop feature of clean-json, but on a
JSON blurb where all the characters, backslash included, are already
all properly escaped, so that we do not need further escape.

So, we drop the backslash escaping from clean-json, and use the newly
introduced mk-json-str helper in every locations where we turn a
Makefile variable into a JSON string.

Signed-off-by: Yann E. MORIN <yann.morin.1998@free.fr>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>

package/pkg-utils.mk

@@ -96,7 +96,7 @@ endef
 # $(1): upper-case package or filesystem name
 define json-info
 	"$($(1)_NAME)": {
-		"type": "$($(1)_TYPE)",
+		"type": $(call mk-json-str,$($(1)_TYPE)),
 		$(if $(filter rootfs,$($(1)_TYPE)), \
 			$(call _json-info-fs,$(1)), \
 			$(call _json-info-pkg,$(1)), \
@@ -107,47 +107,59 @@ endef
 # _json-info-pkg, _json-info-pkg-details, _json-info-fs: private helpers
 # for json-info, above
 define _json-info-pkg
-	"name": "$($(1)_RAWNAME)",
+	"name": $(call mk-json-str,$($(1)_RAWNAME)),
 	$(if $($(1)_IS_VIRTUAL), \
 		"virtual": true$(comma),
 		"virtual": false$(comma)
 		$(call _json-info-pkg-details,$(1)) \
 	)
-	"build_dir": "$(patsubst $(CONFIG_DIR)/%,%,$($(1)_BUILDDIR))",
+	"build_dir": $(call mk-json-str,$(patsubst $(CONFIG_DIR)/%,%,$($(1)_BUILDDIR))),
 	$(if $(filter target,$($(1)_TYPE)), \
 		"install_target": $(call yesno-to-bool,$($(1)_INSTALL_TARGET))$(comma) \
 		"install_staging": $(call yesno-to-bool,$($(1)_INSTALL_STAGING))$(comma) \
 		"install_images": $(call yesno-to-bool,$($(1)_INSTALL_IMAGES))$(comma) \
 	)
 	"dependencies": [
-		$(call make-dq-comma-list,$(sort $($(1)_FINAL_ALL_DEPENDENCIES)))
+		$(call make-comma-list, \
+			$(foreach dep,$(sort $($(1)_FINAL_ALL_DEPENDENCIES)), \
+				$(call mk-json-str,$(dep)) \
+			) \
+		)
 	],
 	"reverse_dependencies": [
-		$(call make-dq-comma-list,$(sort $($(1)_RDEPENDENCIES)))
+		$(call make-comma-list, \
+			$(foreach dep,$(sort $($(1)_RDEPENDENCIES)), \
+				$(call mk-json-str,$(dep)) \
+			) \
+		)
 	]
 	$(if $($(1)_CPE_ID_VALID), \
-		$(comma) "cpe-id": "$($(1)_CPE_ID)" \
+		$(comma) "cpe-id": $(call mk-json-str,$($(1)_CPE_ID)) \
 	)
 	$(if $($(1)_IGNORE_CVES),
 		$(comma) "ignore_cves": [
-			$(call make-dq-comma-list,$(sort $($(1)_IGNORE_CVES)))
+			$(call make-comma-list, \
+				$(foreach cve,$(sort $($(1)_IGNORE_CVES)), \
+					$(call mk-json-str,$(cve)) \
+				) \
+			)
 		]
 	)
 endef
 
 define _json-info-pkg-details
-	"version": "$($(1)_DL_VERSION)",
-	"licenses": "$($(1)_LICENSE)",
-	"dl_dir": "$($(1)_DL_SUBDIR)",
+	"version": $(call mk-json-str,$($(1)_DL_VERSION)),
+	"licenses": $(call mk-json-str,$($(1)_LICENSE)),
+	"dl_dir": $(call mk-json-str,$($(1)_DL_SUBDIR)),
 	"downloads": [
 	$(foreach dl,$(sort $($(1)_ALL_DOWNLOADS)),
 		{
-			"source": "$(notdir $(dl))",
+			"source": $(call mk-json-str,$(notdir $(dl))),
 			"uris": [
-				$(call make-dq-comma-list,
-					$(subst \|,|,
-						$(call DOWNLOAD_URIS,$(dl),$(1))
-					)
+				$(call make-comma-list, \
+					$(foreach uri,$(call DOWNLOAD_URIS,$(dl),$(1)), \
+						$(call mk-json-str,$(subst \|,|,$(uri))) \
+					) \
 				)
 			]
 		},
@@ -157,11 +169,15 @@ endef
 
 define _json-info-fs
 	"image_name": $(if $($(1)_FINAL_IMAGE_NAME), \
-				"$($(1)_FINAL_IMAGE_NAME)", \
+				$(call mk-json-str,$($(1)_FINAL_IMAGE_NAME)), \
 				null \
 			),
 	"dependencies": [
-		$(call make-dq-comma-list,$(sort $($(1)_DEPENDENCIES)))
+		$(call make-comma-list, \
+			$(foreach dep,$(sort $($(1)_DEPENDENCIES)), \
+				$(call mk-json-str,$(dep)) \
+			) \
+		)
 	]
 endef
 
@@ -171,9 +187,8 @@ endef
 clean-json = $(strip \
 	$(subst $(comma)},}, $(subst $(comma)$(space)},$(space)}, \
 	$(subst $(comma)],], $(subst $(comma)$(space)],$(space)], \
-	$(subst \,\\, \
 		$(strip $(1)) \
-	))))) \
+	)))) \
 )
 
 # mk-json-str -- escape and double-quote a string to make it a valid json string