fscr

a wrapper around the F# compiler

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

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

• with -t library a dll is created and not ran

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

example: running unit tests in a project

test-loop.mp4

example: running script

fscr.mp4

building:

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

• cd src/fscr
• dotnet publish -p:PublishReadyToRun=true --ucr