33926ed1e7
Add a :log command that shows logs for a derivation. Closes https://github.com/NixOS/nix/issues/3504 Co-authored-by: Taeer Bar-Yam <taeer@bar-yam.me>
1.1 KiB
1.1 KiB
R""(
Examples
-
Display all special commands within the REPL:
# nix repl nix-repl> :? -
Evaluate some simple Nix expressions:
# nix repl nix-repl> 1 + 2 3 nix-repl> map (x: x * 2) [1 2 3] [ 2 4 6 ] -
Interact with Nixpkgs in the REPL:
# nix repl '<nixpkgs>' Loading '<nixpkgs>'... Added 12428 variables. nix-repl> emacs.name "emacs-27.1" nix-repl> emacs.drvPath "/nix/store/lp0sjrhgg03y2n0l10n70rg0k7hhyz0l-emacs-27.1.drv" nix-repl> drv = runCommand "hello" { buildInputs = [ hello ]; } "hello; hello > $out" nix-repl> :b drv this derivation produced the following outputs: out -> /nix/store/0njwbgwmkwls0w5dv9mpc1pq5fj39q0l-hello nix-repl> builtins.readFile drv "Hello, world!\n" nix-repl> :log drv Hello, world!
Description
This command provides an interactive environment for evaluating Nix expressions. (REPL stands for 'read–eval–print loop'.)
On startup, it loads the Nix expressions named files and adds them
into the lexical scope. You can load addition files using the :l <filename> command, or reload all files using :r.
)""