Working with XML
Encode and decode to and from XML. Whitespace is not conserved for round trips - but the order of the fields are.
Consecutive xml nodes with the same name are assumed to be arrays.
XML content data, attributes processing instructions and directives are all created as plain fields.
This can be controlled by:
--xml-attribute-prefix
+
(changing to +@
soon)
Legs in <cat legs="4"/>
--xml-content-name
+content
Meow in <cat>Meow <fur>true</true></cat>
--xml-directive-name
+directive
<!DOCTYPE config system "blah">
--xml-proc-inst-prefix
+p_
<?xml version="1"?>
Default Attribute Prefix will be changing in v4.30! In order to avoid name conflicts (e.g. having an attribute named "content" will create a field that clashes with the default content name of "+content") the attribute prefix will be changing to "+@".
This will affect users that have not set their own prefix and are not roundtripping XML changes.
Encoder / Decoder flag options
In addition to the above flags, there are the following xml encoder/decoder options controlled by flags:
--xml-strict-mode
false
Strict mode enforces the requirements of the XML specification. When switched off the parser allows input containing common mistakes. See the Golang xml decoder for more details.
--xml-keep-namespace
true
Keeps the namespace of attributes
--xml-raw-token
true
Does not verify that start and end elements match and does not translate name space prefixes to their corresponding URLs.
--xml-skip-proc-inst
false
Skips over processing instructions, e.g. <?xml version="1"?>
--xml-skip-directives
false
Skips over directives, e.g. <!DOCTYPE config system "blah">
See below for examples
Parse xml: simple
Notice how all the values are strings, see the next example on how you can fix that.
Given a sample.xml file of:
then
will output
Parse xml: number
All values are assumed to be strings when parsing XML, but you can use the from_yaml
operator on all the strings values to autoparse into the correct type.
Given a sample.xml file of:
then
will output
Parse xml: array
Consecutive nodes with identical xml names are assumed to be arrays.
Given a sample.xml file of:
then
will output
Parse xml: force as an array
In XML, if your array has a single item, then yq doesn't know its an array. This is how you can consistently force it to be an array. This handles the 3 scenarios of having nothing in the array, having a single item and having multiple.
Given a sample.xml file of:
then
will output
Parse xml: force all as an array
Given a sample.xml file of:
then
will output
Parse xml: attributes
Attributes are converted to fields, with the default attribute prefix '+'. Use '--xml-attribute-prefix` to set your own.
Given a sample.xml file of:
then
will output
Parse xml: attributes with content
Content is added as a field, using the default content name of +content
. Use --xml-content-name
to set your own.
Given a sample.xml file of:
then
will output
Parse xml: content split between comments/children
Multiple content texts are collected into a sequence.
Given a sample.xml file of:
then
will output
Parse xml: custom dtd
DTD entities are processed as directives.
Given a sample.xml file of:
then
will output
Parse xml: skip custom dtd
DTDs are directives, skip over directives to skip DTDs.
Given a sample.xml file of:
then
will output
Parse xml: with comments
A best attempt is made to preserve comments.
Given a sample.xml file of:
then
will output
Parse xml: keep attribute namespace
Defaults to true
Given a sample.xml file of:
then
will output
instead of
Parse xml: keep raw attribute namespace
Defaults to true
Given a sample.xml file of:
then
will output
instead of
Encode xml: simple
Given a sample.yml file of:
then
will output
Encode xml: array
Given a sample.yml file of:
then
will output
Encode xml: attributes
Fields with the matching xml-attribute-prefix are assumed to be attributes.
Given a sample.yml file of:
then
will output
Encode xml: attributes with content
Fields with the matching xml-content-name is assumed to be content.
Given a sample.yml file of:
then
will output
Encode xml: comments
A best attempt is made to copy comments to xml.
Given a sample.yml file of:
then
will output
Encode: doctype and xml declaration
Use the special xml names to add/modify proc instructions and directives.
Given a sample.yml file of:
then
will output
Round trip: with comments
A best effort is made, but comment positions and white space are not preserved perfectly.
Given a sample.xml file of:
then
will output
Roundtrip: with doctype and declaration
yq parses XML proc instructions and directives into nodes. Unfortunately the underlying XML parser loses whitespace information.
Given a sample.xml file of:
then
will output
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