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Update documentation w.r.t. ignoreUnsetValue: true #2750

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Update documentation w.r.t. ignoreUnsetValue: true #2750

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cf66930
Update documentation w.r.t. `ignoreDefaultValue: true`
Vlatombe Mar 6, 2026
5d75c3b
Rename ignoreDefaultValue -> ignoreUnsetValue
Vlatombe Mar 9, 2026
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32 changes: 30 additions & 2 deletions content/en/docs/plugins/resource/dockerfile.adoc
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Original file line number Diff line number Diff line change
Expand Up @@ -214,7 +214,7 @@ Matches https://docs.docker.com/engine/reference/builder/#arg[Dockerfile ARG, wi

* When used as a target, *only* the value of the argument (right of the `=` when present)
** When no argument value is found (e.g. default value, no character `=` or empty value),
then updatecli appends the `=` character followed by the value.
then updatecli appends the `=` character followed by the value. It is possible to disable this behaviour by providing `ignoreUnsetValue: true` in the configuration.

With the following definition:

Expand Down Expand Up @@ -243,6 +243,34 @@ ARG RUST_VERSION=UPDATECLI_VERSION
ARG updatecli_version
----

Using `ignoreUnsetValue: true`, with the following definition:

[source, yaml]
----
spec:
file: Dockerfile
instruction:
keyword: "ARG"
matcher: "UPDATECLI_VERSION"
ignoreUnsetValue: true
----

you get the following results:

[source, Dockerfile]
----
# Matches
ARG UPDATECLI_VERSION=0.1.0
arg UPDATECLI_VERSION=0.1.0

## Does NOT matches
ARG UPDATECLI_VERSION
ARG UPDATECLI_VERSION=
ARG GOLANG_VERSION
ARG RUST_VERSION=UPDATECLI_VERSION
ARG updatecli_version
----

==== ENV

Matches https://docs.docker.com/engine/reference/builder/#env[Dockerfile ENV, window="_blank"] instruction by keys to manipulate their values.
Expand All @@ -257,7 +285,7 @@ Matches https://docs.docker.com/engine/reference/builder/#env[Dockerfile ENV, wi

* When used as a target, *only* the value of the environment (right of the `=` when present)
** When no environment value is found (e.g. default value, no character `=` or empty value),
then updatecli appends the `=` character followed by the value.
then updatecli appends the `=` character followed by the value. It is possible to disable this behaviour by providing `ignoreUnsetValue: true` in the configuration.

With the following definition:

Expand Down