97 lines
1.9 KiB
Text
97 lines
1.9 KiB
Text
Some conventions:
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* Don't use TABs. Everybody has different TAB settings so it's asking
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for trouble.
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* Use 2 spaces of indentation per indentation level in Nix
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expressions, 4 spaces in shell scripts. (Maybe 2 is too low, but
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for consistency's sake it should be the same. Certainly indentation
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should be consistent within a single file.)
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* Use lowerCamelCase for variable names, not UpperCamelCase.
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* Function calls with attribute set arguments are written as
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foo {
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arg = ...;
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}
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not
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foo
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{
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arg = ...;
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}
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Also fine is
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foo { arg = ...; }
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if it's a short call.
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* In attribute sets or lists that span multiple lines, the attribute
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names or list elements should be aligned:
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# A long list.
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list = [
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elem1
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elem2
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elem3
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];
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# A long attribute set.
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attrs = {
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attr1 = short_expr;
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attr2 =
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if true then big_expr else big_expr;
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};
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* Short lists or attribute sets can be written on one line:
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# A short list.
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list = [ elem1 elem2 elem3 ];
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# A short set.
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attrs = { x = 1280; y = 1024; };
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* Breaking in the middle of a function argument can give hard-to-read
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code, like
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someFunction { x = 1280;
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y = 1024; } otherArg
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yetAnotherArg
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(especially if the argument is very large, spanning multiple lines).
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Better:
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someFunction
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{ x = 1280; y = 1024; }
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otherArg
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yetAnotherArg
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or
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let res = { x = 1280; y = 1024; };
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in someFunction res otherArg yetAnotherArg
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* The bodies of functions, asserts, and withs are not indented, so
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assert system == "i686-linux";
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stdenv.mkDerivation { ...
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not
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assert system == "i686-linux";
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stdenv.mkDerivation { ...
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* Function formal arguments are written as:
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{arg1, arg2, arg3}:
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but if they don't fit on one line they're written as:
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{ arg1, arg2, arg3
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, arg4, ...
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, argN
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}:
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