include inputfile in errors (#150)

src/Literate.jl

@@ -458,7 +458,7 @@ function markdown(inputfile, outputdir=pwd(); config::Dict=Dict(), kwargs...)
             write_code = !(all(l -> endswith(l, "#hide"), chunk.lines) && !(config["documenter"]::Bool))
             write_code && write(iomd, seekstart(iocode))
             if config["execute"]::Bool
-                execute_markdown!(iomd, sb, join(chunk.lines, '\n'), outputdir)
+                execute_markdown!(iomd, sb, join(chunk.lines, '\n'), outputdir; inputfile=config["literate_inputfile"])
             end
         end
         write(iomd, '\n') # add a newline between each chunk
@@ -472,9 +472,9 @@ function markdown(inputfile, outputdir=pwd(); config::Dict=Dict(), kwargs...)
     return outputfile
 end
 
-function execute_markdown!(io::IO, sb::Module, block::String, outputdir)
+function execute_markdown!(io::IO, sb::Module, block::String, outputdir; inputfile::String="<unknown>")
     # TODO: Deal with explicit display(...) calls
-    r, str, _ = execute_block(sb, block)
+    r, str, _ = execute_block(sb, block; inputfile=inputfile)
     plain_fence = "\n```\n" =>  "\n```" # issue #101: consecutive codefenced blocks need newline
     if r !== nothing && !REPL.ends_with_semicolon(block)
         for (mime, ext) in [(MIME("image/png"), ".png"), (MIME("image/jpeg"), ".jpeg")]
@@ -601,7 +601,7 @@ function jupyter_notebook(chunks, config)
         @info "executing notebook `$(config["name"] * ".ipynb")`"
         try
             cd(config["literate_outputdir"]) do
-                nb = execute_notebook(nb)
+                nb = execute_notebook(nb; inputfile=config["literate_inputfile"])
             end
         catch err
             @error "error when executing notebook based on input file: " *
@@ -612,7 +612,7 @@ function jupyter_notebook(chunks, config)
     return nb
 end
 
-function execute_notebook(nb)
+function execute_notebook(nb; inputfile::String="<unknown>")
     sb = sandbox()
     execution_count = 0
     for cell in nb["cells"]
@@ -620,7 +620,7 @@ function execute_notebook(nb)
         execution_count += 1
         cell["execution_count"] = execution_count
         block = join(cell["source"])
-        r, str, display_dicts = execute_block(sb, block)
+        r, str, display_dicts = execute_block(sb, block; inputfile=inputfile)
 
         # str should go into stream
         if !isempty(str)
@@ -702,7 +702,7 @@ function Base.display(ld::LiterateDisplay, mime::MIME, x)
 end
 
 # Execute a code-block in a module and capture stdout/stderr and the result
-function execute_block(sb::Module, block::String)
+function execute_block(sb::Module, block::String; inputfile::String="<unknown>")
     @debug """execute_block($sb, block)
     ```
     $(block)
@@ -724,7 +724,7 @@ function execute_block(sb::Module, block::String)
     if c.error
         error("""
              $(sprint(showerror, c.value))
-             when executing the following code block
+             when executing the following code block in file `$(Base.contractuser(inputfile))`
 
              ```julia
              $block

test/runtests.jl

@@ -1038,14 +1038,15 @@ end end
 
             # test error when executing notebook
             write(inputfile, "for i in 1:10\n    println(i)")
-            r = @test_logs((:error, r"error when executing"), match_mode=:any,
+            r = @test_logs((:error, r"error when executing notebook based on input file: "), match_mode=:any,
                 try
                     Literate.notebook(inputfile, outdir)
                 catch err
                     err
                 end)
             @test isa(r, ErrorException)
-            @test occursin("when executing the following code block", r.msg)
+            @test occursin("when executing the following code block in file ", r.msg)
+            @test occursin(inputfile, r.msg)
 
             # verify that inputfile exists
             @test_throws ArgumentError Literate.notebook("nonexistent.jl", outdir)