Add r.support (combined with r.timestamp) algorithm

Author: Médéric RIBREUX

python/plugins/processing/algs/grass7/description/r.support.txt

@@ -0,0 +1,14 @@
+r.support
+Allows creation and/or modification of raster map layer support files (metadata).
+Raster (r.*)
+ParameterRaster|map|Name of raster map|False
+ParameterString|title|Title for resultant raster map|None|False|True
+ParameterString|timestamp|r.timestamp date: Datetime, datetime1/datetime2, or 'none' to remove'|None|False|True
+ParameterString|history|Text to append to the next line of the map's metadata file|None|True|True
+ParameterString|units|Text to use for map data units|None|False|True
+ParameterString|vdatum|Text to use for map vertical datum|None|False|True
+ParameterString|source1|Text to use for data source, line 1|None|False|True
+ParameterString|source2|Text to use for data source, line 2|None|False|True
+ParameterString|description|Text to use for data description or keyword(s)|None|False|True
+*ParameterFile|loadhistory|Text file from which to load history|False
+OutputRaster|output|Metadata

python/plugins/processing/algs/grass7/ext/r_support.py

@@ -0,0 +1,66 @@
+# -*- coding: utf-8 -*-
+
+"""
+***************************************************************************
+    r_support.py
+    ------------
+    Date                 : February 2016
+    Copyright            : (C) 2016 by Médéric Ribreux
+    Email                : medspx at medspx dot fr
+***************************************************************************
+*                                                                         *
+*   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 2 of the License, or     *
+*   (at your option) any later version.                                   *
+*                                                                         *
+***************************************************************************
+"""
+
+__author__ = 'Médéric Ribreux'
+__date__ = 'February 2016'
+__copyright__ = '(C) 2016, Médéric Ribreux'
+
+# This will get replaced with a git SHA1 when you do a git archive
+
+__revision__ = '$Format:%H$'
+
+import os
+
+
+def processCommand(alg):
+    # We temporary remove the output
+    out = alg.getOutputFromName('output')
+    mapParam = alg.getParameterValue('map')
+    alg.exportedLayers[out.value] = alg.exportedLayers[mapParam]
+    alg.removeOutputFromName('output')
+    timestamp = alg.getParameterValue('timestamp')
+    if timestamp:
+        command = "r.timestamp map={} date='{}'".format(alg.exportedLayers[mapParam],
+                                                        timestamp)
+        alg.commands.append(command)
+        alg.parameters.remove(alg.getParameterFromName('timestamp'))
+    alg.processCommand()
+
+    # We re-add the new output
+    alg.addOutput(out)
+
+
+def processOutputs(alg):
+    tags = {'title': 'TIFFTAG_DOCUMENTNAME', 'description': 'TIFFTAG_IMAGEDESCRIPTION',
+            'creator': 'TIFFTAG_ARTIST', 'timestamp': 'TIFFTAG_DATETIME',
+            'source1': 'TIFFTAG_COPYRIGHT', 'units': 'TIFFTAG_RESOLUTIONUNIT',
+            'source2': 'GRASS_SOURCE2', 'comments': 'GRASS_HISTORY', 'vdatum': 'GRASS_VDATUM'}
+    awk = "awk -F '=' '"
+    for support, tag in tags.items():
+        awk = '{0} /{1}=".+"/{{ print \"{2}=\"substr($0,{3},length($0) - {3})"," }}'.format(
+            awk, support, tag, len(support) + 3)
+
+    # Output results ('from' table and output table)
+    out = alg.getOutputValue('output')
+    command = u"SDF=$(r.info -e map={} | {}')".format(alg.exportedLayers[out], awk)
+    alg.commands.append(command)
+    command = u"r.out.gdal --overwrite -c createopt=\"TFW=YES,COMPRESS=LZW\" input={} output=\"{}\" metaopt=\"${{SDF%%,}}\"".format(
+        alg.exportedLayers[out], out)
+    alg.commands.append(command)
+    alg.outputCommands.append(command)