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lix/tests/functional2/repl_characterization/repl_basics/printing.md
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rootile ab8cdcc9b8 tests(f2/repl): migrate basic tests
Change-Id: I22241734a7249d376c86b3a226c5f1a82c03fd33
2026-06-11 16:19:20 +02:00

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Printing a string with escapes in it will render as a string normally
```nix
"meow\n\nmeowmeowmeow"
```
```output
"meow\n\nmeowmeowmeow"
```
But with `:p` on the string itself it will print it literally to the output
```nix
:p "meow\n\nmeowmeow"
```
```output
meow
meowmeow
```
Also, `:p` will expand attrs, but it will leave the strings escaped as normal if they aren't at the top level item being printed
```nix
builtins.listToAttrs (builtins.genList (x: { name = "meow${toString x}"; value = { meow = { inherit x; s = "meowmeow\n\n${toString x}"; }; }; }) 10)
:p builtins.listToAttrs (builtins.genList (x: { name = "meow${toString x}"; value = { meow = { inherit x; s = "meowmeow\n\n${toString x}"; }; }; }) 10)
```
```output
{
meow0 = { ... };
meow1 = { ... };
meow2 = { ... };
meow3 = { ... };
meow4 = { ... };
meow5 = { ... };
meow6 = { ... };
meow7 = { ... };
meow8 = { ... };
meow9 = { ... };
}
{
meow0 = {
meow = {
s = "meowmeow\n\n0";
x = 0;
};
};
meow1 = {
meow = {
s = "meowmeow\n\n1";
x = 1;
};
};
meow2 = {
meow = {
s = "meowmeow\n\n2";
x = 2;
};
};
meow3 = {
meow = {
s = "meowmeow\n\n3";
x = 3;
};
};
meow4 = {
meow = {
s = "meowmeow\n\n4";
x = 4;
};
};
meow5 = {
meow = {
s = "meowmeow\n\n5";
x = 5;
};
};
meow6 = {
meow = {
s = "meowmeow\n\n6";
x = 6;
};
};
meow7 = {
meow = {
s = "meowmeow\n\n7";
x = 7;
};
};
meow8 = {
meow = {
s = "meowmeow\n\n8";
x = 8;
};
};
meow9 = {
meow = {
s = "meowmeow\n\n9";
x = 9;
};
};
}
```
Printing an environment with :env after adding a variable to the scope
```nix
foo = "bar"
:env
```
```output
Added foo.
Env level 0
static: foo
Env level 1
abort baseNameOf break builtins derivation derivationStrict dirOf false fetchGit fetchMercurial fetchTarball fetchTree fromTOML import isNull map null placeholder removeAttrs scopedImport throw toString true
```
Printing a derivation or something
```nix
fakeDrv = let drvAttrs = { builder = "meow"; system = "meower"; name = "mrowmrow"; }; in { inherit (drvAttrs) builder system name; inherit drvAttrs; type = "derivation"; }
:p fakeDrv
```
```output
Added fakeDrv.
{
builder = "meow";
drvAttrs = «3 attributes elided»;
name = "mrowmrow";
system = "meower";
type = "derivation";
}
```