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Pretty-print values in the REPL

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Pretty-print values in the REPL by printing each item in a list or
attrset on a separate line. When possible, single-item lists and
attrsets are printed on one line, as long as they don't contain a nested
list, attrset, or thunk.

Before:
```
{ attrs = { a = { b = { c = { }; }; }; }; list = [ 1 ]; list' = [ 1 2 3 ]; }
```

After:
```
{
  attrs = {
    a = {
      b = {
        c = { };
      };
    };
  };
  list = [ 1 ];
  list' = [
    1
    2
    3
  ];
}
```
This commit is contained in:
Rebecca Turner 2024-02-04 00:40:30 -08:00
parent a31f2cb0cd
commit c0a15fb7d0
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6 changed files with 195 additions and 23 deletions
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69
tests/functional/repl.sh
View file

@ -146,29 +146,86 @@ echo "$replResult" | grepQuiet -s afterChange
# Normal output should print attributes in lexicographical order non-recursively
testReplResponseNoRegex '
{ a = { b = 2; }; l = [ 1 2 3 ]; s = "string"; n = 1234; x = rec { y = { z = { inherit y; }; }; }; }
' '{ a = { ... }; l = [ ... ]; n = 1234; s = "string"; x = { ... }; }'
' \
'{
a = { ... };
l = [ ... ];
n = 1234;
s = "string";
x = { ... };
}
'
# Same for lists, but order is preserved
testReplResponseNoRegex '
[ 42 1 "thingy" ({ a = 1; }) ([ 1 2 3 ]) ]
' '[ 42 1 "thingy" { ... } [ ... ] ]'
' \
'[
42
1
"thingy"
{ ... }
[ ... ]
]
'
# Same for let expressions
testReplResponseNoRegex '
let x = { y = { a = 1; }; inherit x; }; in x
' '{ x = «repeated»; y = { ... }; }'
' \
'{
x = { ... };
y = { ... };
}
'
# The :p command should recursively print sets, but prevent infinite recursion
testReplResponseNoRegex '
:p { a = { b = 2; }; s = "string"; n = 1234; x = rec { y = { z = { inherit y; }; }; }; }
' '{ a = { b = 2; }; n = 1234; s = "string"; x = { y = { z = { y = «repeated»; }; }; }; }'
' \
'{
a = { b = 2; };
n = 1234;
s = "string";
x = {
y = {
z = {
y = «repeated»;
};
};
};
}
'
# Same for lists
testReplResponseNoRegex '
:p [ 42 1 "thingy" (rec { a = 1; b = { inherit a; inherit b; }; }) ([ 1 2 3 ]) ]
' '[ 42 1 "thingy" { a = 1; b = { a = 1; b = «repeated»; }; } [ 1 2 3 ] ]'
' \
'[
42
1
"thingy"
{
a = 1;
b = {
a = 1;
b = «repeated»;
};
}
[
1
2
3
]
]
'
# Same for let expressions
testReplResponseNoRegex '
:p let x = { y = { a = 1; }; inherit x; }; in x
' '{ x = «repeated»; y = { a = 1; }; }'
' \
'{
x = «repeated»;
y = { a = 1 };
}
'