fscr

a wrapper around the F# compiler

usage: fscr [-t exe|library] <script.fsx / project.fsproj> (default: exe)

the output is created into bin/ relative to workdir and executed after compiling,

• with -t library only a dll is created

the reason to use this over dotnet build or dotnet run is:

• that it takes ~300ms to recompile and run after changes (instead of several seconds!)
• all dll references are symlinked instead of copied
• the compilation is done with an in-memory filesystem
• the same compiler process is reused after first compilation
• also recompiles any referenced projects much faster

example:

recording.mp4

building:

either run as a project

dotnet run -c Release --project ../fscr/fscr.fsproj -- <path/to/myproject>.fsproj

or compile the project from source with Ready2Run, this drastically reduces initial startup time:

• dotnet publish src/fscr/ -p:PublishReadyToRun=true --ucr
• ./artifacts/publish/fscr/release/fscr <path/to/myproject>.fsproj