tuse "png" gnuplot terminal by default, fix PHONY makefile target - Granular.jl - Julia package for granular dynamics simulation
 (HTM) git clone git://src.adamsgaard.dk/Granular.jl
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       ---
 (DIR) commit c48addad81b25ae643e2d198d96bee7b161ce47b
 (DIR) parent 05f958f204e5f1c0a7b127c0c7df87cbb6050dc2
 (HTM) Author: Anders Damsgaard <andersd@riseup.net>
       Date:   Fri, 17 Nov 2017 17:21:13 -0500
       
       use "png" gnuplot terminal by default, fix PHONY makefile target
       
       Diffstat:
         M Makefile                            |       2 +-
         M src/grain.jl                        |       4 ++--
         M test/grain.jl                       |      14 ++++++--------
       
       3 files changed, 9 insertions(+), 11 deletions(-)
       ---
 (DIR) diff --git a/Makefile b/Makefile
       t@@ -7,7 +7,7 @@ test: test-julia-0.6 test-julia-0.7
        test-julia-0.6:
                julia --color=yes -e 'Pkg.test("Granular")'
        
       -.PHONY: test-julia-0.6
       +.PHONY: test-julia-0.7
        test-julia-0.7:
                julia-0.7 --color=yes -e 'Pkg.test("Granular")'
        
 (DIR) diff --git a/src/grain.jl b/src/grain.jl
       t@@ -744,8 +744,8 @@ function plotGrainSizeDistribution(simulation::Simulation;
                                             nbins::Int=12,
                                             size_type::String = "contact",
                                             figsize::Tuple = (6,4),
       -                                     filetype::String = "pdf",
       -                                     gnuplot_terminal::String = "pdfcairo",
       +                                     filetype::String = "png",
       +                                     gnuplot_terminal::String = "png",
                                             verbose::Bool = true,
                                             skip_fixed::Bool = true,
                                             log_y::Bool = false,
 (DIR) diff --git a/test/grain.jl b/test/grain.jl
       t@@ -32,18 +32,16 @@ Granular.compareGrains(sim.grains[1], sim.grains[2])
        
        info("Testing GSD plotting ")
        Granular.plotGrainSizeDistribution(sim)
       -@test isfile("test-grain-size-distribution.pdf")
       -rm("test-grain-size-distribution.pdf")
       -Granular.plotGrainSizeDistribution(sim, filetype="png",
       -                                   gnuplot_terminal="pngcairo")
       +@test isfile("test-grain-size-distribution.png")
       +rm("test-grain-size-distribution.png")
        @test isfile("test-grain-size-distribution.png")
        rm("test-grain-size-distribution.png")
        Granular.plotGrainSizeDistribution(sim, skip_fixed=false)
       -@test isfile("test-grain-size-distribution.pdf")
       -rm("test-grain-size-distribution.pdf")
       +@test isfile("test-grain-size-distribution.png")
       +rm("test-grain-size-distribution.png")
        Granular.plotGrainSizeDistribution(sim, size_type="areal")
       -@test isfile("test-grain-size-distribution.pdf")
       -rm("test-grain-size-distribution.pdf")
       +@test isfile("test-grain-size-distribution.png")
       +rm("test-grain-size-distribution.png")
        @test_throws ErrorException Granular.plotGrainSizeDistribution(sim, size_type="asdf")
        
        info("Testing external body force routines")