Stop adding extra new line after XML declaration with pretty format #164
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kou
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Jul 10, 2024
lib/rexml/formatters/pretty.rb
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| @@ -111,7 +111,7 @@ def write_document( node, output ) | |||
| # itself, then we don't need a carriage return... which makes this | |||
| # logic more complex. | |||
| node.children.each { |child| | |||
| next if child == node.children[-1] and child.instance_of?(Text) | |||
| next if child == "\n" and child.instance_of?(Text) | |||
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Hmm. Does this work with the following XML?
<?xml version="1.0" encoding="UTF-8"?>
<message>Hello world!</message>It seems that we can ignore all top-level text nodes:
diff --git a/lib/rexml/formatters/pretty.rb b/lib/rexml/formatters/pretty.rb
index a1198b7..a838d83 100644
--- a/lib/rexml/formatters/pretty.rb
+++ b/lib/rexml/formatters/pretty.rb
@@ -111,7 +111,7 @@ module REXML
# itself, then we don't need a carriage return... which makes this
# logic more complex.
node.children.each { |child|
- next if child == node.children[-1] and child.instance_of?(Text)
+ next if child.instance_of?(Text)
unless child == node.children[0] or child.instance_of?(Text) or
(child == node.children[1] and !node.children[0].writethis)
output << "\n"There was a problem hiding this comment.
I think this is the right correction, too.
If next if child.instance_of?(Text), then the following XML works.
<?xml version="1.0" encoding="UTF-8"?>
<message>Hello world!</message>
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@naitoh Interestingly if you have top-level text nodes that are not an ?xml node, then you end up with the strange behavior below where it outputs a leading blank line.
XXX<message>Hello world!</message>d = REXML::Document.new("XXX<message>Hello world!</message>")
d.to_s
# => "XXX<message>Hello world!</message>"
d.write(out = '', 2)
out
# => "\n<message>\n Hello world!\n</message>"Note that I think this leading "XXX" is invalid XML anyway, but is parsed successfully with REXML (Nokogiri fails in STRICT mode with this). I wonder if you also need to fail on text nodes before the root node similar to how you did it in #161 for those after the root node?
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Let's open a new issue and discuss this on the new issue.
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I have created #184 which fixes the above.
## Why?
Fix REXML::Formatters::Pretty#write_document, which implicitly assumes that the XML file ends with a newline.
If the XML file does not end with a newline, a space is added to the end of the first line.
```
Failure: test_indent(REXMLTests::TestDocument::WriteTest::ArgumentsTest)
/Users/naitoh/ghq/github.com/naitoh/rexml/test/test_document.rb:270:in `test_indent'
267: output = ""
268: indent = 2
269: @document.write(output, indent)
=> 270: assert_equal(<<-EOX.chomp, output)
271: <?xml version='1.0' encoding='UTF-8'?>
272: <message>
273: Hello world!
<"<?xml version='1.0' encoding='UTF-8'?>\n" +
"<message>\n" +
" Hello world!\n" +
"</message>"> expected but was
<"<?xml version='1.0' encoding='UTF-8'?> \n" +
"<message>\n" +
" Hello world!\n" +
"</message>">
diff:
? <?xml version='1.0' encoding='UTF-8'?>
<message>
Hello world!
</message>
```
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aduth
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Likely a result of ruby/rexml#164
aduth
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* Bump rexml to resolve security advisory changelog: Internal, Dependencies, Update dependencies to resolve security advisories * Add rexml as explicit dependency Since we use it in our code, it should be an explicit dependency See: https://github.com/18F/identity-idp/blob/ea8a6081961d6c373a870dd5fea31efce89fde7e/app/services/proofing/aamva/request/verification_request.rb#L60-L102 * Sync AAMVA fixture to expected output Likely a result of ruby/rexml#164
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…fore root element (#184) ## Why? XML with content at the start of the document is invalid. https://www.w3.org/TR/2006/REC-xml11-20060816/#document ``` [1] document ::= ( prolog element Misc* ) - ( Char* RestrictedChar Char* ) ``` https://www.w3.org/TR/2006/REC-xml11-20060816/#NT-prolog ``` [22] prolog ::= XMLDecl Misc* (doctypedecl Misc*)? ``` https://www.w3.org/TR/2006/REC-xml11-20060816/#NT-XMLDecl ``` [23] XMLDecl ::= '<?xml' VersionInfo EncodingDecl? SDDecl? S? '?>' ``` https://www.w3.org/TR/2006/REC-xml11-20060816/#NT-Misc ``` [27] Misc ::= Comment | PI | S ``` https://www.w3.org/TR/2006/REC-xml11-20060816/#NT-PI ``` [16] PI ::= '<?' PITarget (S (Char* - (Char* '?>' Char*)))? '?>' ``` https://www.w3.org/TR/2006/REC-xml11-20060816/#NT-PITarget ``` [17] PITarget ::= Name - (('X' | 'x') ('M' | 'm') ('L' | 'l')) ``` https://www.w3.org/TR/2006/REC-xml11-20060816/#NT-doctypedecl ``` [28] doctypedecl ::= '<!DOCTYPE' S Name (S ExternalID)? S? ('[' intSubset ']' S?)? '>' ``` See: #164 (comment)
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If the XML file does not end with a newline, a space is added to the end of the first line.
This is happen because
REXML::Formatters::Pretty#write_documenthas a logic that depends on the last text node.We should ignore all top-level text nodes with pretty format.