Fix devurl when running on Travis CI, fixes #87.

src/Literate.jl

@@ -230,7 +230,8 @@ function create_configuration(inputfile; user_config, user_kwargs)
     if haskey(ENV, "HAS_JOSH_K_SEAL_OF_APPROVAL") # Travis CI
         repo_slug = get(ENV, "TRAVIS_REPO_SLUG", "unknown-repository")
         deploy_folder = if get(ENV, "TRAVIS_PULL_REQUEST", nothing) == "false"
-            get(ENV, "TRAVIS_TAG", get(user_config, "devurl", "dev"))
+            t = get(ENV, "TRAVIS_TAG", "")
+            isempty(t) ? get(user_config, "devurl", "dev") : t
         else
             "previews/PR$(get(ENV, "TRAVIS_PULL_REQUEST", "##"))"
         end

test/runtests.jl

@@ -312,7 +312,7 @@ const GITLAB_ENV = Dict(
 
             # Travis with with PR preview build
             withenv(TRAVIS_ENV...,
-                    "TRAVIS_TAG" => nothing,
+                    "TRAVIS_TAG" => "",
                     "TRAVIS_PULL_REQUEST" => "42") do
                 Literate.script(inputfile, outdir)
             end
@@ -323,7 +323,7 @@ const GITLAB_ENV = Dict(
 
             # Travis with no tag -> dev directory
             withenv(TRAVIS_ENV...,
-                    "TRAVIS_TAG" => nothing) do
+                    "TRAVIS_TAG" => "") do
                 Literate.script(inputfile, outdir)
             end
             script = read(joinpath(outdir, "inputfile.jl"), String)
@@ -512,7 +512,7 @@ end end
 
             # Travis with PR preview build
             withenv(TRAVIS_ENV...,
-                    "TRAVIS_TAG" => nothing,
+                    "TRAVIS_TAG" => "",
                     "TRAVIS_PULL_REQUEST" => "42") do
                 Literate.markdown(inputfile, outdir)
             end
@@ -524,7 +524,7 @@ end end
 
             # Travis with no tag -> dev directory
             withenv(TRAVIS_ENV...,
-                    "TRAVIS_TAG" => nothing) do
+                    "TRAVIS_TAG" => "") do
                 Literate.markdown(inputfile, outdir)
             end
             markdown = read(joinpath(outdir, "inputfile.md"), String)
@@ -794,7 +794,7 @@ end end
 
             # no tag -> latest directory
             withenv(TRAVIS_ENV...,
-                    "TRAVIS_TAG" => nothing) do
+                    "TRAVIS_TAG" => "") do
                 Literate.notebook(inputfile, outdir, execute = false)
             end
             notebook = read(joinpath(outdir, "inputfile.ipynb"), String)
@@ -951,7 +951,7 @@ end end
 
             # Overwriting of URLs
             withenv("TRAVIS_REPO_SLUG" => "fredrikekre/Literate.jl",
-                    "TRAVIS_TAG" => nothing,
+                    "TRAVIS_TAG" => "",
                     "TRAVIS_PULL_REQUEST" => "false",
                     "HAS_JOSH_K_SEAL_OF_APPROVAL" => "true") do
                 Literate.script(inputfile, outdir; config=config)