Add XML node based on two of parents child values in the shell

Question

How can I change this:

...
<dependencies>
    ...
    <dependency>
        <groupId>xyz</groupId>
        <artifactId>abc</artifactId>
    </dependency>
    ...
</dependencies>
...

to that:

...
<dependencies>
    ...
    <dependency>
        <groupId>xyz</groupId>
        <artifactId>abc</artifactId>
        <scope>system</scope>
        <systemPath>/.../src/main/.../some.jar</systemPath>
    </dependency>
    ...
</dependencies>
...

based on the value of "/dependencies/dependency/groupId" AND "/dependencies/dependency/artifactId"

in bash (by xmlstarlet,...)?

Update

Obviously this seems to be not clear enough. So: The code has to find the dependency with groupId==xyz and artifactId==abc and then (and only then) add the two now nodes to the parent of the groupId and artifactId node.

When you says depending on "dependencies/dependency/groupId" AND "/dependencies/dependency/artifactId", what is the logic? Does it use the values in these fields? Does it update only if there are certain values? — Raman Sailopal, Dec 21 '20 at 12:07

score 1 · Answer 1 · answered Dec 21 '20 at 13:15

1

Try something like:

xmlstarlet ed \
--subnode "//dependency[//artifactId[./text()='abc']][//groupId[./text()='xyz']]" --type elem -n scope -v "system" \
--subnode "//dependency[//artifactId[./text()='abc']][//groupId[./text()='xyz']]" --type elem -n systemPath -v "some.jar" \
file.xml

answered Dec 21 '20 at 13:15

Jack Fleeting

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@eventhorizon What's missing? – Jack Fleeting Dec 21 '20 at 22:20
See my answer. Your suggestion is absolutely right. The important thing missing - sideshow but important - is the namespace “thing“... Others may have the same problem not knowing enough about it... – eventhorizon Dec 23 '20 at 11:54

score 0 · Accepted Answer · answered Dec 21 '20 at 18:59

With the help of @Jack Fleeting and the post from @uk4sx (XMLStarlet does not select anything) - the namespace had to be set - I finally got it running like this (it it run from within a Dockerfile):

RUN xmlstarlet ed -L -N my=http://maven.apache.org/POM/4.0.0 \
    --subnode "//my:dependencies/my:dependency[my:artifactId[./text()='abc']][my:groupId[./text()='xyz']]" \
      --type elem -n scope      -v "system" \
    --subnode "//my:dependencies/my:dependency[my:artifactId[./text()='abc']][my:groupId[./text()='xyz']]" \
      --type elem -n systemPath -v "\.../src/main/.../some.jar" \
    ./pom.xml

Add XML node based on two of parents child values in the shell

2 Answers2