buildhistory.bbclass: Improve the generated depends.dot file

* Convert incorrectly formatted dependencies such as:
    "bar -> "foo" ">=" "1.2.3"
  into dependencies with edge labels:
    "bar -> "foo" [label=">= 1.2.3"]
* Remove rpmlib() and config() dependencies such as:
    "foo" -> "rpmlib(CompressedFileNames)" [label="<= 3.0.4-1"]
  and:
    "base-files" -> "config(base-files)" [label="= 3.0.14-r89.49"]
* Remove the trailing semicolon that was added to each line. It fills
  no purpose.

(From OE-Core rev: 37ea2c8b299483f0e12fad66efa789c6445571e0)

Signed-off-by: Peter Kjellerstedt <peter.kjellerstedt@axis.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

meta/classes/buildhistory.bbclass

@@ -435,13 +435,20 @@ buildhistory_get_installed() {
 
 	# Produce dependency graph
 	# First, quote each name to handle characters that cause issues for dot
-	sed 's:\([^| ]*\):"\1":g' ${WORKDIR}/bh_installed_pkgs_deps.txt > $1/depends.tmp && \
+	sed 's:\([^| ]*\):"\1":g' ${WORKDIR}/bh_installed_pkgs_deps.txt > $1/depends.tmp &&
 		rm ${WORKDIR}/bh_installed_pkgs_deps.txt
-	# Change delimiter from pipe to -> and set style for recommend lines
-	sed -i -e 's:|: -> :' -e 's:"\[REC\]":[style=dotted]:' -e 's:$:;:' $1/depends.tmp
+	# Remove lines with rpmlib(...) and config(...) dependencies, change the
+	# delimiter from pipe to "->", set the style for recommend lines and
+	# turn versioned dependencies into edge labels.
+	sed -i -e '/rpmlib(/d' \
+	       -e '/config(/d' \
+	       -e 's:|: -> :' \
+	       -e 's:"\[REC\]":[style=dotted]:' \
+	       -e 's:"\([<>=]\+\)" "\([^"]*\)":[label="\1 \2"]:' \
+		$1/depends.tmp
 	# Add header, sorted and de-duped contents and footer and then delete the temp file
 	printf "digraph depends {\n    node [shape=plaintext]\n" > $1/depends.dot
-	cat $1/depends.tmp | sort | uniq >> $1/depends.dot
+	cat $1/depends.tmp | sort -u >> $1/depends.dot
 	echo "}" >>  $1/depends.dot
 	rm $1/depends.tmp