Parse output from IntegrationTests performance metrics (#1054)

* Parse output and leave as CSV on disk for later usage.
* Minor tweaks to step & file names

Co-authored-by: Stefan Ceriu <stefanc@matrix.org>

Tools/Scripts/parsePerformanceMetrics.sh

@@ -0,0 +1,21 @@
+#!/bin/bash
+
+# Parses performance metrics from the full report of a IntegrationTest run (do not use xcpretty first!)
+# This file can normally be found in `~/Library/Logs/scan/IntegrationTests-IntegrationTests.log`
+
+# Provide file as $1
+# Provide identifier (eg, date, GITHUB_SHA) as $2
+
+echo "Parsing $1 for test results with identifier $2" >&2
+
+NOW=`date -u -Iminutes`
+
+# Find all the measurement lines in the file, then strip out the gumph into a CSV-like format.
+grep ".*measured.*values" $1 | sed -e "s/.*Test Case .*-\[//" -e "s/\]' measured \[/,/" -e "s/\].*values: \[/,/" -e "s/\], performance.*//" -e "s/^/$2,/" \
+   -e "s/IntegrationTests.ApplicationTests testLaunchPerformance,Duration (AppLaunch), s/launchPerformance/" \
+   -e "s/IntegrationTests.LoginTests testLoginFlow/loginPerformance/" \
+   -e "s/^/$NOW,/"
+
+# The output should contain fields for the identifier, name, type, unit, then a list of recorded values (normally 5)
+
+# Put this into a file somewhere for later usage.