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|
{lib, ...}: let
merge = merge_list: let
head_of_merge = builtins.head merge_list;
in
if builtins.isAttrs head_of_merge
then
builtins.zipAttrsWith (
name: values: let
head_value = builtins.head values;
in
if builtins.isString head_value
then builtins.concatStringsSep "" values
else if builtins.isList head_value
then builtins.concatLists values
else if builtins.isAttrs head_value
then merge values
else builtins.head values
)
merge_list
else if builtins.isString head_of_merge
then builtins.concatStringsSep "" merge_list
else if builtins.isList head_of_merge
then builtins.concatLists merge_list
else builtins.head merge_list;
# Tests
## Strings
a = {
a = ''
This is some
'';
};
b = {
a = ''
example text
'';
};
c = {
a = "(which is nice)";
};
## Lists
d = {
a = ["element1" "element2"];
};
e = {
a = [["elment3" "elemnt4"]];
};
f = {
a = ["elemnt5"];
};
## Pure strings
g = "This";
h = "is";
i = "some example text";
j = ''
(with a newline)
'';
## Pure lists
k = ["element1"];
l = ["element2" "element3"];
m = ["element4"];
## Prepared tests
tests = {
tests = []; # Uncomment to actually run the tests
test_strings = {
expr = merge [a b c];
expected = {a = "This is some\nexample text\n(which is nice)";};
};
test_lists = {
expr = merge [d e f];
expected = {a = ["element1" "element2" ["elment3" "elemnt4"] "elemnt5"];};
};
test_pure_strings = {
expr = merge [g h i j];
expected = "Thisissome example text(with a newline)\n";
};
test_pure_lists = {
expr = merge [k l m];
expected = ["element1" "element2" "element3" "element4"];
};
};
in {
inherit merge;
result = lib.debug.runTests tests;
}
|
