55 lines
1.5 KiB
Markdown
55 lines
1.5 KiB
Markdown
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---
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slug: /1230/chain-actions
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displayed_sidebar: europa
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---
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# How can I chain actions together ?
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Dependencies are materialized at runtime, when your Cue files are parsed and the corresponding DAG gets generated:
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```cue
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// Prerequisite action that runs when `test` is being called
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_dockerCLI: alpine.#Build & {
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packages: {
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bash: {}
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}
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}
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// Main action
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foo: bash.#Run & {
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input: _dockerCLI.output // <== CHAINING of action happening here
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always: true
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script: contents: #"""
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echo "bonjour"
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"""#
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}
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```
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On above example, `_dockerCLI` gets executed first, as the corresponding DAG shows that it is required for the action `foo` to be processed.
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This is the `input-output` model: `foo`'s input is `_dockerCLI`'s output.
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We currently don't support explicit dependencies at the moment (one of our top priority). But, if you need one, here is how your can hack your way around it:
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```cue
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foo: bash.#Run & {
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input: _dockerCLI.output
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always: true
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script: contents: #"""
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echo "bonjour"
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"""#
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}
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// Main action
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bar: bash.#Run & {
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input: _dockerCLI.output
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always: true
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script: contents: #"""
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echo "bonjour"
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"""#
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env: HACK: "\(test.success)" // <== HACK: CHAINING of action happening here
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}
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```
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`foo` and `bar` are similar actions. I don't want to rely on the `input-output` model but still want to force a dependency between them. The easiest way is to create an environment variable that relies on the other action's success
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