[gimp] tools: add performance-log-progressive-coalesce.py; use in performance-log-viewer

[Ell <ell src gnome org>]

commit 76f9e5feafb4dac8cb9ecece87c4bb3ee4ece7ad
Author: Ell <ell_se yahoo com>
Date:   Thu Jul 30 00:59:18 2020 +0300

    tools: add performance-log-progressive-coalesce.py; use in performance-log-viewer
    
    Add a new performance-log-progressive-coalesce.py tool, which
    coalesces partial address maps in progressive performacne logs into
    a single global address map, suitable for processing by the rest of
    the tools.
    
    Use the new tool as part of the pipeline in performance-log-viewer.

 tools/Makefile.am                             | 21 ++++++-----
 tools/performance-log-progressive-coalesce.py | 54 +++++++++++++++++++++++++++
 tools/performance-log-viewer                  | 11 +++---
 3 files changed, 71 insertions(+), 15 deletions(-)
---
diff --git a/tools/Makefile.am b/tools/Makefile.am
index f6df70ffa2..b785a07a19 100644
--- a/tools/Makefile.am
+++ b/tools/Makefile.am
@@ -96,14 +96,15 @@ AM_LDFLAGS = \
        $(xnone)
 
 EXTRA_DIST = \
-       defcheck.py                     \
-       gimp-mkenums                    \
-       gimppath2svg.py                 \
-       mnemonic-clashes                \
-       performance-log-close-tags.py   \
-       performance-log-coalesce.py     \
-       performance-log-deduce.py       \
-       performance-log-expand.py       \
-       performance-log-resolve.py      \
-       performance-log-viewer          \
+       defcheck.py                             \
+       gimp-mkenums                            \
+       gimppath2svg.py                         \
+       mnemonic-clashes                        \
+       performance-log-close-tags.py           \
+       performance-log-coalesce.py             \
+       performance-log-deduce.py               \
+       performance-log-expand.py               \
+       performance-log-progressive-coalesce.py \
+       performance-log-resolve.py              \
+       performance-log-viewer                  \
        performance-log-viewer.py
diff --git a/tools/performance-log-progressive-coalesce.py b/tools/performance-log-progressive-coalesce.py
new file mode 100755
index 0000000000..1942e5ffce
--- /dev/null
+++ b/tools/performance-log-progressive-coalesce.py
@@ -0,0 +1,54 @@
+#!/usr/bin/env python3
+
+"""
+performance-log-progressive-coalesce.py -- Coalesce address-maps in progressive
+GIMP performance logs
+Copyright (C) 2020  Ell
+
+This program is free software: you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation; either version 3 of the License, or
+(at your option) any later version.
+
+This program is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
+
+Usage: performance-log-progressive-coalesce.py < infile > outfile
+"""
+
+from xml.etree import ElementTree
+import sys
+
+empty_element = ElementTree.Element ("")
+
+# Read performance log from STDIN
+log = ElementTree.fromstring (sys.stdin.buffer.read ())
+
+samples = log.find ("samples") or empty_element
+
+address_map = log.find ("address-map")
+
+if not address_map:
+    address_map = ElementTree.Element ("address-map")
+
+# Coalesce partial address maps
+for partial_address_map in samples.iterfind ("address-map"):
+    for element in partial_address_map:
+        address_map.append (element)
+
+# Remove partial address maps
+for partial_address_map in samples.iterfind ("address-map"):
+    samples.remove (partial_address_map)
+
+# Add global address map
+if not log.find ("address-map") and len (address_map) > 0:
+    log.append (address_map)
+
+# Write performance log to STDOUT
+sys.stdout.buffer.write (ElementTree.tostring (log))
diff --git a/tools/performance-log-viewer b/tools/performance-log-viewer
index f3aa5612ae..2ef7f38b85 100755
--- a/tools/performance-log-viewer
+++ b/tools/performance-log-viewer
@@ -30,9 +30,10 @@ file="$1"
 
 < "$file" || exit 1
 
-< "$file"                                    \
-"$tools_dir/performance-log-close-tags.py" | \
-"$tools_dir/performance-log-expand.py"     | \
-"$tools_dir/performance-log-coalesce.py"   | \
-"$tools_dir/performance-log-deduce.py"     | \
+< "$file"                                              \
+"$tools_dir/performance-log-close-tags.py"           | \
+"$tools_dir/performance-log-progressive-coalesce.py" | \
+"$tools_dir/performance-log-expand.py"               | \
+"$tools_dir/performance-log-coalesce.py"             | \
+"$tools_dir/performance-log-deduce.py"               | \
 "$tools_dir/performance-log-viewer.py"