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#!/usr/bin/python2.7
# -*- coding: utf-8 -*-
# -----------------------------------------------------------
#
# Copyright (C) 2012 Radim Blazek
# EMAIL: radim.blazek (at) gmail.com
#
# -----------------------------------------------------------
#
# licensed under the terms of GNU GPL 2
#
# 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.
#
# 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, write to the Free Software Foundation, Inc.,
# 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
#
# ---------------------------------------------------------------------
"""
***************************************************************************
GRASS Direct test - to be run in GRASS shell
- collects list of raster layers
- exports GRASS layers on low resolution to temporary GeoTIFFs
- runs GRASS modules in standard and direct mode and compares results
- writes out report
***************************************************************************
"""
__author__ = 'Radim Blazek'
__date__ = 'December 2012'
__copyright__ = '(C) 2012, Radim Blazek'
__revision__ = '$Format:%H$'
import os
import sys
import subprocess
import time
import re
class Test:
def __init__(self):
if "GISBASE" not in os.environ or "GISRC" not in os.environ:
print "This script must be run in GRASS shell."
sys.exit(1)
if "QGIS_PREFIX_PATH" not in os.environ:
print "QGIS_PREFIX_PATH environment variable not set."
sys.exit(1)
self.size = 10
self.reportStr = ""
pass
# add message to HTML report
def report(self, msg):
self.reportStr += msg + "\n"
def writeReport(self):
print self.reportStr
def test(self):
print "GRASS Direct test"
tmp_dir = os.path.abspath("qgis-grass-test-%s" % time.strftime('%y%m%d-%H%M%S'))
tmp_dir = os.path.abspath("qgis-grass-test-debug") # debug
print "Output will be written to %s" % tmp_dir
files_dir = "%s/tif" % tmp_dir
#os.makedirs( files_dir )
# get list of raster layers
print "Getting list of rasters ..."
rasters = self.srun(["g.mlist", "type=rast"]).splitlines()
max_rasters = 1
print "%s rasters found, using first %s" % (len(rasters), max_rasters)
rasters = rasters[0:1]
print "Exporting rasters"
for raster in rasters:
print raster
output = "%s/%s.tif" % (files_dir, raster)
self.srun(["g.region", "rast=%s" % raster, "cols=%s" % self.size, "rows=%s" % self.size])
self.srun(["r.out.gdal", "input=%s" % raster, "output=%s" % output])
# run modules
for module in self.modules():
for raster in rasters:
module = re.sub(" *", " ", module)
module_name = module.split(" ")[0]
# --- native ---
self.srun(["g.region", "rast=%s" % raster, "cols=%s" % self.size, "rows=%s" % self.size])
output = "qgistest1"
# clean old
self.srun(["g.remove", "-f", "rast=%s" % output])
# substitute rasters
native_args = module.replace("R1", raster).replace("RO1", output).split(" ")
(code, out, err) = self.run(native_args)
if code != 0:
self.report("Native failed: %s" % " ".join(native_args))
# export
native_output_file = "%s/%s-%s-native.tif" % (files_dir, module_name, raster)
self.srun(["r.out.gdal", "input=%s" % output, "output=%s" % native_output_file])
self.srun(["g.remove", "-f", "rast=%s" % output])
# --- direct ---
direct_input_file = "%s/%s.tif" % (files_dir, raster)
direct_output_file = "%s/%s-%s-direct.tif" % (files_dir, module_name, raster)
# substitute rasters
direct_args = module.replace("R1", direct_input_file).replace("RO1", direct_output_file).split(" ")
env = os.environ
# CRS
proj = self.srun(["g.proj", "-j"])
longlat = True if proj.find("+proj=longlat") != -1 else False
proj = proj.splitlines()
proj = " ".join(proj)
print proj
env['QGIS_GRASS_CRS'] = proj
# set GRASS region as environment variable
reg = self.srun(["g.region", "-g"])
reg_dict = dict(item.split("=") for item in reg.splitlines())
reg_var = {'n': 'north', 's': 'south', 'e': 'east', 'w': 'west', 'nsres': 'n-s resol', 'ewres': 'e-w resol'}
if longlat:
region = "proj:3;zone:-1" # longlat
else:
region = "proj:99;zone:-1" # other projection
for k, v in reg_dict.iteritems():
if k == 'cells':
continue
kn = k
if k in reg_var:
kn = reg_var[k]
region += ";%s:%s" % (kn, v)
print region
env['GRASS_REGION'] = region
# add path to fake GRASS gis library
env['LD_LIBRARY_PATH'] = "%s/lib/qgis/plugins/:%s" % (env['QGIS_PREFIX_PATH'], env['LD_LIBRARY_PATH'])
(code, out, err) = self.run(direct_args, env)
print "code = %s" % code
if code != 0:
self.report("Direct failed: %s\n%s\n%s" % (" ".join(direct_args), out, err))
# TODO: compare native x direct output
def run(self, args, env=None, input=None, exit_on_error=False):
cmd = " ".join(args)
print cmd
p = subprocess.Popen(args, stdout=subprocess.PIPE, stderr=subprocess.PIPE, stdin=subprocess.PIPE, env=env)
com = p.communicate(input)
p.wait()
if p.returncode != 0 and exit_on_error:
msg = "Failed:\n" + str(com[0]) + "\n" + str(com[1])
raise Exception(msg)
return (p.returncode, com[0], com[1]) # return stdout
# simple run
def srun(self, args):
return self.run(args, None, None, True)[1]
def modules(self):
# R1 - input raster 1
# RO1 - output raster 1
modules = [
"r.slope.aspect elevation=R1 aspect=RO1"
]
return modules
if __name__ == '__main__':
test = Test()
test.test()
test.writeReport()
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