add isdir check

README.md

@@ -7,7 +7,10 @@ $ julia --project -e "using Pkg; Pkg.instantiate()"
 # Setup
 
 To access data from somewhere else on the disk we use a symlink located `public/data`
-that points to the files.
+that points to the files, e.g.
+```sh
+$ ln -s <path/to/rootdir> public/data
+```
 
 # Start the server
 

routes.jl

@@ -54,7 +54,8 @@ end
 
 
 route("/") do
-  rootdir = "./public/data/dg1d.jl/pars/test_advection"
+  rootdir = "./public/data/test_advection"
+  @assert isdir(rootdir) "Rootdir '$rootdir' not found!"
   outputdirs = gather_outputdirs(rootdir)
   prms = [ TOML.parsefile(joinpath(dir, "$(Filesystem.basename(dir)).toml")) 
                for dir in outputdirs ]
@@ -113,9 +114,11 @@ end
 
 
 route("/plots") do
-  rootdir = "./public/data/dg1d.jl/pars/test_advection"
+  rootdir = "./public/data/test_advection"
+  @assert isdir(rootdir) "Rootdir '$rootdir' not found!"
   outputdirs = gather_outputdirs(rootdir)
   plotpaths = [ joinpath(dir, "evolution_mu.png") for dir in outputdirs ]
+  display(plotpaths)
   slideshow = html_slideshow(plotpaths)
   html = Html.html(slideshow)
 end