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std.Build.Step.ConfigHeader: handle undefined keys and values correctly

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We intend to mimic the behavior of cmake which means we need to handle undefined keys and values the same
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Jan200101 2025-05-29 21:39:56 +02:00
parent 854774d468
commit d3645b70d0
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1 changed files with 12 additions and 15 deletions
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27
lib/std/Build/Step/ConfigHeader.zig
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@ -650,7 +650,7 @@ fn expand_variables_cmake(
}
const key = contents[curr + 1 .. close_pos];
const value = values.get(key) orelse return error.MissingValue;
const value = values.get(key) orelse .undef;
const missing = contents[source_offset..curr];
try result.appendSlice(missing);
switch (value) {
@ -705,10 +705,7 @@ fn expand_variables_cmake(
const key_start = open_pos.target + open_var.len;
const key = result.items[key_start..];
if (key.len == 0) {
return error.MissingKey;
}
const value = values.get(key) orelse return error.MissingValue;
const value = values.get(key) orelse .undef;
result.shrinkRetainingCapacity(result.items.len - key.len - open_var.len);
switch (value) {
.undef, .defined => {},
@ -909,8 +906,8 @@ test "expand_variables_cmake simple cases" {
// line with misc content is preserved
try testReplaceVariablesCMake(allocator, "no substitution", "no substitution", values);
// empty ${} wrapper leads to an error
try std.testing.expectError(error.MissingKey, testReplaceVariablesCMake(allocator, "${}", "", values));
// empty ${} wrapper is removed
try testReplaceVariablesCMake(allocator, "${}", "", values);
// empty @ sigils are preserved
try testReplaceVariablesCMake(allocator, "@", "@", values);
@ -973,9 +970,9 @@ test "expand_variables_cmake simple cases" {
try testReplaceVariablesCMake(allocator, "undef@", "undef@", values);
try testReplaceVariablesCMake(allocator, "undef}", "undef}", values);
// unknown key leads to an error
try std.testing.expectError(error.MissingValue, testReplaceVariablesCMake(allocator, "@bad@", "", values));
try std.testing.expectError(error.MissingValue, testReplaceVariablesCMake(allocator, "${bad}", "", values));
// unknown key is removed
try testReplaceVariablesCMake(allocator, "@bad@", "", values);
try testReplaceVariablesCMake(allocator, "${bad}", "", values);
}
test "expand_variables_cmake edge cases" {
@ -1020,17 +1017,17 @@ test "expand_variables_cmake edge cases" {
try testReplaceVariablesCMake(allocator, "@dollar@{@string@}", "${text}", values);
// when expanded variables contain invalid characters, they prevent further expansion
try std.testing.expectError(error.MissingValue, testReplaceVariablesCMake(allocator, "${${string_var}}", "", values));
try std.testing.expectError(error.MissingValue, testReplaceVariablesCMake(allocator, "${@string_var@}", "", values));
try testReplaceVariablesCMake(allocator, "${${string_var}}", "", values);
try testReplaceVariablesCMake(allocator, "${@string_var@}", "", values);
// nested expanded variables are expanded from the inside out
try testReplaceVariablesCMake(allocator, "${string${underscore}proxy}", "string", values);
try testReplaceVariablesCMake(allocator, "${string@underscore@proxy}", "string", values);
// nested vars are only expanded when ${} is closed
try std.testing.expectError(error.MissingValue, testReplaceVariablesCMake(allocator, "@nest@underscore@proxy@", "", values));
try testReplaceVariablesCMake(allocator, "@nest@underscore@proxy@", "underscore", values);
try testReplaceVariablesCMake(allocator, "${nest${underscore}proxy}", "nest_underscore_proxy", values);
try std.testing.expectError(error.MissingValue, testReplaceVariablesCMake(allocator, "@nest@@nest_underscore@underscore@proxy@@proxy@", "", values));
try testReplaceVariablesCMake(allocator, "@nest@@nest_underscore@underscore@proxy@@proxy@", "underscore", values);
try testReplaceVariablesCMake(allocator, "${nest${${nest_underscore${underscore}proxy}}proxy}", "nest_underscore_proxy", values);
// invalid characters lead to an error
@ -1056,5 +1053,5 @@ test "expand_variables_cmake escaped characters" {
try testReplaceVariablesCMake(allocator, "$\\{string}", "$\\{string}", values);
// backslash is skipped when checking for invalid characters, yet it mangles the key
try std.testing.expectError(error.MissingValue, testReplaceVariablesCMake(allocator, "${string\\}", "", values));
try testReplaceVariablesCMake(allocator, "${string\\}", "", values);
}