Regression: plotting legend hangs and cannot read from text file

[adigitoleo]

I had some code that worked before ca. version 0.38?

    legend(
        legendfile,
        position = (; anchor = :BL),
        box = (; pen = :thinner, fill = :white),
    )

This now complains that option -D is not set, which is aliased to position. I tried adding inside = :BL to the position NamedTuple, but then the code hangs indefinitely.

I'll try to come up with a proper minimal reproducible example.

[adigitoleo]

Reproduced on v0.40.1 with:

julia> using GMT

julia> gmtbegin("test_legend.png")

julia> coast(region = (110, 210, -35, 45), projection = :Mercator, frame = :auto, land = :dimgray, shore = :thinner)

julia> arrows(hcat(rand(110:210, 10), rand(-35:45, 10), zeros(10), rand(-90:90, 10), rand(1:3, 10)), linewidth = :thickest, linecolor = :black, vecmap = (; justify = :center), transparency = 33)

julia> open("legend.txt", append = true) do file
           println(file, "S 0.25c - 0.33 black 2p 0.75c 1s delay time")
       end

julia> legend("legend.txt", position = (; inside = :BL, anchor = :BL), box = (; pen = :thinner, fill = :white))
^Z
zsh: suspended  julia --banner=no --project=$PWD
admin@hades ~/Documents/PhD/code/Maps
%zsh> cat legend.txt                                                                              [bg:1]
S 0.25c - 0.33 black 2p 0.75c 1s delay time
admin@hades ~/Documents/PhD/code/Maps
%zsh> fg                                                                                          [bg:1]
[1]  + continued  julia --banner=no --project=$PWD


julia> gmtend(show = true)

Produced a box with no contents, and legend call had to be interrupted with Ctrl-D.

[joa-quim]

... did a lot of improvements in legend some versions ago.
Seems that not all were improvements.

[adigitoleo]

Seems to be two issues: the missing width segfault and inability to read from a legend file:

julia> gmtbegin("test_legend.png")

shell> cat legend.txt
S 0.25c - 0.33 black 2p 0.75c 1s delay time
S 0.25c - 0.33 black 2p 0.75c 1s delay time

julia> legend("legend.txt", position = (; inside = :BL, anchor = :BL, width = 5), box = (; pen = 0.5), region = (0, 10, 0, 8))
legend [WARNING]: File <stdin> is empty!

julia> gmtend(show = true) # No legend

[adigitoleo]

The file reading issue persists in old GMT mode:

julia> using GMT

shell> cat legend.txt
S 0.25c - 0.33 black 2p 0.75c 1s delay time
S 0.25c - 0.33 black 2p 0.75c 1s delay time

julia> legend("legend.txt", position = (; inside = :BL, anchor = :BL, width = 5), box = (; pen = 0.5), region = (0, 10, 0, 8))
pslegend [WARNING]: File <stdin> is empty!

julia> showfig()

[joa-quim]

Yep, I can see that in pslegend.jl the cmd0 arg that contains the file name is only used in monolithic mode.
This one should be easy to fix.

[joa-quim]

Fixed in #829

[adigitoleo]

Thanks, it works.