F# Scripts
Use F# scripts for quick experiments when you prefer F# syntax and interactive-style scripting.
Entry suffix:
*script.fsx
Examples:
samples/FSharpScriptDemo/main_script.fsx
samples/FSharpScriptDemo/selection_script.fsx
NuGet References
Declare package references with F# #r directives:
#r "nuget: FSharp.Data, 6.4.0"
#r "nuget: Newtonsoft.Json"
#load "Helpers.fsx"
#r "nuget: …" resolves through FSharpDependencyResolver and the shared NugetManager. Restored packages and restore graphs live under:
%APPDATA%\RevitDevTool\nuget
When NuGet or file #r directives must be rewritten, the graph is copied under a temp cache with #line mapping so diagnostics and debugging point back to your original files.
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Host Version Symbols
F# scripts receive the same host-year symbols as C# scripts (REVIT, AUTOCAD, {HOST}{year}, {HOST}{year}_OR_GREATER) via FSI --define: arguments from CompileScriptSymbols.
Debugging
F# scripts run through FSI with --debug+ and sequence-point mapping back to the original .fsx paths. Attach the debugger to the host process, set breakpoints in your .fsx files, then run from RevitDevTool.
For attach settings shared with C# scripts and assemblies, see Attach Debugger.
Editing
For a better VSCode editing experience, install Ionide for F#.