mirror of
https://github.com/mikefarah/yq.git
synced 2025-03-10 19:37:46 +00:00
479 lines
8.4 KiB
Markdown
479 lines
8.4 KiB
Markdown
# 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 and attributes are created as fields. This can be controlled by the `'--xml-attribute-prefix` and `--xml-content-name` flags - see below for examples.
|
|
|
|
{% hint style="warning" %}
|
|
Note that versions prior to 4.18 require the 'eval/e' command to be specified. 
|
|
|
|
`yq e <exp> <file>`
|
|
{% endhint %}
|
|
|
|
## 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:
|
|
```xml
|
|
<?xml version="1.0" encoding="UTF-8"?>
|
|
<cat>
|
|
<says>meow</says>
|
|
<legs>4</legs>
|
|
<cute>true</cute>
|
|
</cat>
|
|
```
|
|
then
|
|
```bash
|
|
yq -p=xml '.' sample.xml
|
|
```
|
|
will output
|
|
```yaml
|
|
+p_xml: version="1.0" encoding="UTF-8"
|
|
cat:
|
|
says: meow
|
|
legs: "4"
|
|
cute: "true"
|
|
```
|
|
|
|
## 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:
|
|
```xml
|
|
<?xml version="1.0" encoding="UTF-8"?>
|
|
<cat>
|
|
<says>meow</says>
|
|
<legs>4</legs>
|
|
<cute>true</cute>
|
|
</cat>
|
|
```
|
|
then
|
|
```bash
|
|
yq -p=xml ' (.. | select(tag == "!!str")) |= from_yaml' sample.xml
|
|
```
|
|
will output
|
|
```yaml
|
|
+p_xml: version="1.0" encoding="UTF-8"
|
|
cat:
|
|
says: meow
|
|
legs: 4
|
|
cute: true
|
|
```
|
|
|
|
## Parse xml: array
|
|
Consecutive nodes with identical xml names are assumed to be arrays.
|
|
|
|
Given a sample.xml file of:
|
|
```xml
|
|
<?xml version="1.0" encoding="UTF-8"?>
|
|
<animal>cat</animal>
|
|
<animal>goat</animal>
|
|
```
|
|
then
|
|
```bash
|
|
yq -p=xml '.' sample.xml
|
|
```
|
|
will output
|
|
```yaml
|
|
+p_xml: version="1.0" encoding="UTF-8"
|
|
animal:
|
|
- cat
|
|
- goat
|
|
```
|
|
|
|
## 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:
|
|
```xml
|
|
<?xml version="1.0" encoding="UTF-8"?>
|
|
<cat legs="4">
|
|
<legs>7</legs>
|
|
</cat>
|
|
```
|
|
then
|
|
```bash
|
|
yq -p=xml '.' sample.xml
|
|
```
|
|
will output
|
|
```yaml
|
|
+p_xml: version="1.0" encoding="UTF-8"
|
|
cat:
|
|
+@legs: "4"
|
|
legs: "7"
|
|
```
|
|
|
|
## 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:
|
|
```xml
|
|
<?xml version="1.0" encoding="UTF-8"?>
|
|
<cat legs="4">meow</cat>
|
|
```
|
|
then
|
|
```bash
|
|
yq -p=xml '.' sample.xml
|
|
```
|
|
will output
|
|
```yaml
|
|
+p_xml: version="1.0" encoding="UTF-8"
|
|
cat:
|
|
+content: meow
|
|
+@legs: "4"
|
|
```
|
|
|
|
## Parse xml: custom dtd
|
|
DTD entities are processed as directives.
|
|
|
|
Given a sample.xml file of:
|
|
```xml
|
|
|
|
<?xml version="1.0"?>
|
|
<!DOCTYPE root [
|
|
<!ENTITY writer "Blah.">
|
|
<!ENTITY copyright "Blah">
|
|
]>
|
|
<root>
|
|
<item>&writer;©right;</item>
|
|
</root>
|
|
```
|
|
then
|
|
```bash
|
|
yq -p=xml -o=xml '.' sample.xml
|
|
```
|
|
will output
|
|
```xml
|
|
<?xml version="1.0"?>
|
|
<!DOCTYPE root [
|
|
<!ENTITY writer "Blah.">
|
|
<!ENTITY copyright "Blah">
|
|
]>
|
|
<root>
|
|
<item>&writer;&copyright;</item>
|
|
</root>
|
|
```
|
|
|
|
## Parse xml: skip custom dtd
|
|
DTDs are directives, skip over directives to skip DTDs.
|
|
|
|
Given a sample.xml file of:
|
|
```xml
|
|
|
|
<?xml version="1.0"?>
|
|
<!DOCTYPE root [
|
|
<!ENTITY writer "Blah.">
|
|
<!ENTITY copyright "Blah">
|
|
]>
|
|
<root>
|
|
<item>&writer;©right;</item>
|
|
</root>
|
|
```
|
|
then
|
|
```bash
|
|
yq -p=xml -o=xml --xml-skip-directives '.' sample.xml
|
|
```
|
|
will output
|
|
```xml
|
|
<?xml version="1.0"?>
|
|
<root>
|
|
<item>&writer;&copyright;</item>
|
|
</root>
|
|
```
|
|
|
|
## Parse xml: with comments
|
|
A best attempt is made to preserve comments.
|
|
|
|
Given a sample.xml file of:
|
|
```xml
|
|
|
|
<!-- before cat -->
|
|
<cat>
|
|
<!-- in cat before -->
|
|
<x>3<!-- multi
|
|
line comment
|
|
for x --></x>
|
|
<!-- before y -->
|
|
<y>
|
|
<!-- in y before -->
|
|
<d><!-- in d before -->z<!-- in d after --></d>
|
|
|
|
<!-- in y after -->
|
|
</y>
|
|
<!-- in_cat_after -->
|
|
</cat>
|
|
<!-- after cat -->
|
|
|
|
```
|
|
then
|
|
```bash
|
|
yq -p=xml '.' sample.xml
|
|
```
|
|
will output
|
|
```yaml
|
|
# before cat
|
|
cat:
|
|
# in cat before
|
|
x: "3" # multi
|
|
# line comment
|
|
# for x
|
|
# before y
|
|
|
|
y:
|
|
# in y before
|
|
# in d before
|
|
d: z # in d after
|
|
# in y after
|
|
# in_cat_after
|
|
# after cat
|
|
```
|
|
|
|
## Parse xml: keep attribute namespace
|
|
Given a sample.xml file of:
|
|
```xml
|
|
|
|
<?xml version="1.0"?>
|
|
<map xmlns="some-namespace" xmlns:xsi="some-instance" xsi:schemaLocation="some-url">
|
|
</map>
|
|
|
|
```
|
|
then
|
|
```bash
|
|
yq -p=xml -o=xml --xml-keep-namespace '.' sample.xml
|
|
```
|
|
will output
|
|
```xml
|
|
<?xml version="1.0"?>
|
|
<map xmlns="some-namespace" xmlns:xsi="some-instance" some-instance:schemaLocation="some-url"></map>
|
|
```
|
|
|
|
instead of
|
|
```xml
|
|
<?xml version="1.0"?>
|
|
<map xmlns="some-namespace" xmlns:xsi="some-instance" some-instance:schemaLocation="some-url"></map>
|
|
```
|
|
|
|
## Parse xml: keep raw attribute namespace
|
|
Given a sample.xml file of:
|
|
```xml
|
|
|
|
<?xml version="1.0"?>
|
|
<map xmlns="some-namespace" xmlns:xsi="some-instance" xsi:schemaLocation="some-url">
|
|
</map>
|
|
|
|
```
|
|
then
|
|
```bash
|
|
yq -p=xml -o=xml --xml-keep-namespace --xml-raw-token '.' sample.xml
|
|
```
|
|
will output
|
|
```xml
|
|
<?xml version="1.0"?>
|
|
<map xmlns="some-namespace" xmlns:xsi="some-instance" some-instance:schemaLocation="some-url"></map>
|
|
```
|
|
|
|
instead of
|
|
```xml
|
|
<?xml version="1.0"?>
|
|
<map xmlns="some-namespace" xsi="some-instance" schemaLocation="some-url"></map>
|
|
```
|
|
|
|
## Encode xml: simple
|
|
Given a sample.yml file of:
|
|
```yaml
|
|
cat: purrs
|
|
```
|
|
then
|
|
```bash
|
|
yq -o=xml '.' sample.yml
|
|
```
|
|
will output
|
|
```xml
|
|
<cat>purrs</cat>
|
|
```
|
|
|
|
## Encode xml: array
|
|
Given a sample.yml file of:
|
|
```yaml
|
|
pets:
|
|
cat:
|
|
- purrs
|
|
- meows
|
|
```
|
|
then
|
|
```bash
|
|
yq -o=xml '.' sample.yml
|
|
```
|
|
will output
|
|
```xml
|
|
<pets>
|
|
<cat>purrs</cat>
|
|
<cat>meows</cat>
|
|
</pets>
|
|
```
|
|
|
|
## Encode xml: attributes
|
|
Fields with the matching xml-attribute-prefix are assumed to be attributes.
|
|
|
|
Given a sample.yml file of:
|
|
```yaml
|
|
cat:
|
|
+@name: tiger
|
|
meows: true
|
|
|
|
```
|
|
then
|
|
```bash
|
|
yq -o=xml '.' sample.yml
|
|
```
|
|
will output
|
|
```xml
|
|
<cat name="tiger">
|
|
<meows>true</meows>
|
|
</cat>
|
|
```
|
|
|
|
## Encode xml: attributes with content
|
|
Fields with the matching xml-content-name is assumed to be content.
|
|
|
|
Given a sample.yml file of:
|
|
```yaml
|
|
cat:
|
|
+@name: tiger
|
|
+content: cool
|
|
|
|
```
|
|
then
|
|
```bash
|
|
yq -o=xml '.' sample.yml
|
|
```
|
|
will output
|
|
```xml
|
|
<cat name="tiger">cool</cat>
|
|
```
|
|
|
|
## Encode xml: comments
|
|
A best attempt is made to copy comments to xml.
|
|
|
|
Given a sample.yml file of:
|
|
```yaml
|
|
# above_cat
|
|
cat: # inline_cat
|
|
# above_array
|
|
array: # inline_array
|
|
- val1 # inline_val1
|
|
# above_val2
|
|
- val2 # inline_val2
|
|
# below_cat
|
|
|
|
```
|
|
then
|
|
```bash
|
|
yq -o=xml '.' sample.yml
|
|
```
|
|
will output
|
|
```xml
|
|
<!-- above_cat inline_cat --><cat><!-- above_array inline_array -->
|
|
<array>val1<!-- inline_val1 --></array>
|
|
<array><!-- above_val2 -->val2<!-- inline_val2 --></array>
|
|
</cat><!-- below_cat -->
|
|
```
|
|
|
|
## Encode: doctype and xml declaration
|
|
Use the special xml names to add/modify proc instructions and directives.
|
|
|
|
Given a sample.yml file of:
|
|
```yaml
|
|
+p_xml: version="1.0"
|
|
+directive: 'DOCTYPE config SYSTEM "/etc/iwatch/iwatch.dtd" '
|
|
apple:
|
|
+p_coolioo: version="1.0"
|
|
+directive: 'CATYPE meow purr puss '
|
|
b: things
|
|
|
|
```
|
|
then
|
|
```bash
|
|
yq -o=xml '.' sample.yml
|
|
```
|
|
will output
|
|
```xml
|
|
<?xml version="1.0"?>
|
|
<!DOCTYPE config SYSTEM "/etc/iwatch/iwatch.dtd" >
|
|
<apple><?coolioo version="1.0"?><!CATYPE meow purr puss >
|
|
<b>things</b>
|
|
</apple>
|
|
```
|
|
|
|
## 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:
|
|
```xml
|
|
|
|
<!-- before cat -->
|
|
<cat>
|
|
<!-- in cat before -->
|
|
<x>3<!-- multi
|
|
line comment
|
|
for x --></x>
|
|
<!-- before y -->
|
|
<y>
|
|
<!-- in y before -->
|
|
<d><!-- in d before -->z<!-- in d after --></d>
|
|
|
|
<!-- in y after -->
|
|
</y>
|
|
<!-- in_cat_after -->
|
|
</cat>
|
|
<!-- after cat -->
|
|
|
|
```
|
|
then
|
|
```bash
|
|
yq -p=xml -o=xml '.' sample.xml
|
|
```
|
|
will output
|
|
```xml
|
|
<!-- before cat --><cat><!-- in cat before -->
|
|
<x>3<!-- multi
|
|
line comment
|
|
for x --></x><!-- before y -->
|
|
<y><!-- in y before
|
|
in d before -->
|
|
<d>z<!-- in d after --></d><!-- in y after -->
|
|
</y><!-- in_cat_after -->
|
|
</cat><!-- after cat -->
|
|
```
|
|
|
|
## 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:
|
|
```xml
|
|
<?xml version="1.0"?>
|
|
<!DOCTYPE config SYSTEM "/etc/iwatch/iwatch.dtd" >
|
|
<apple>
|
|
<?coolioo version="1.0"?>
|
|
<!CATYPE meow purr puss >
|
|
<b>things</b>
|
|
</apple>
|
|
|
|
```
|
|
then
|
|
```bash
|
|
yq -p=xml -o=xml '.' sample.xml
|
|
```
|
|
will output
|
|
```xml
|
|
<?xml version="1.0"?>
|
|
<!DOCTYPE config SYSTEM "/etc/iwatch/iwatch.dtd" >
|
|
<apple><?coolioo version="1.0"?><!CATYPE meow purr puss >
|
|
<b>things</b>
|
|
</apple>
|
|
```
|
|
|