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docs: Conditionals example improved with complex syntax (#5467)
Co-authored-by: Simon Behar <simbeh7@gmail.com>
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,68 @@ | ||
| # In this example we flip 2 times a coin. First time we | ||
| # use the simple conditionals syntax. The second time we use | ||
| # regex and a complex condition with logical AND and OR. | ||
| # We also use of the parenthesis for defining the priority. | ||
| apiVersion: argoproj.io/v1alpha1 | ||
| kind: Workflow | ||
| metadata: | ||
| generateName: coinflip- | ||
| spec: | ||
| entrypoint: coinflip | ||
| templates: | ||
| - name: coinflip | ||
| steps: | ||
| # flip a coin | ||
| - - name: flip-coin | ||
| template: flip-coin | ||
| # evaluate the result in parallel | ||
| - - name: heads | ||
| template: heads # call heads template if "heads" | ||
| when: "{{steps.flip-coin.outputs.result}} == heads" | ||
| - name: tails | ||
| template: tails # call tails template if "tails" | ||
| when: "{{steps.flip-coin.outputs.result}} == tails" | ||
| - - name: flip-again | ||
| template: flip-coin | ||
| - - name: complex-condition | ||
| template: heads-tails-or-twice-tails | ||
| # call heads template if first flip was "heads" and second was "tails" OR both were "tails" | ||
| when: >- | ||
| ( {{steps.flip-coin.outputs.result}} == heads && | ||
| {{steps.flip-again.outputs.result}} == tails | ||
| ) || | ||
| ( {{steps.flip-coin.outputs.result}} == tails && | ||
| {{steps.flip-again.outputs.result}} == tails ) | ||
| - name: heads-regex | ||
| template: heads # call heads template if ~ "hea" | ||
| when: "{{steps.flip-again.outputs.result}} =~ hea" | ||
| - name: tails-regex | ||
| template: tails # call heads template if ~ "tai" | ||
| when: "{{steps.flip-again.outputs.result}} =~ tai" | ||
|
|
||
| # Return heads or tails based on a random number | ||
| - name: flip-coin | ||
| script: | ||
| image: python:alpine3.6 | ||
| command: [python] | ||
| source: | | ||
| import random | ||
| result = "heads" if random.randint(0,1) == 0 else "tails" | ||
| print(result) | ||
| - name: heads | ||
| container: | ||
| image: alpine:3.6 | ||
| command: [sh, -c] | ||
| args: ["echo \"it was heads\""] | ||
|
|
||
| - name: tails | ||
| container: | ||
| image: alpine:3.6 | ||
| command: [sh, -c] | ||
| args: ["echo \"it was tails\""] | ||
|
|
||
| - name: heads-tails-or-twice-tails | ||
| container: | ||
| image: alpine:3.6 | ||
| command: [sh, -c] | ||
| args: ["echo \"it was heads the first flip and tails the second. Or it was two times tails.\""] |