GitHub Actions: Passing JSON data to another job - bash

Question

I'm attempting to pass an array of dynamically fetched data from one GitHub Action job to the actual job doing the build. This array will be used as part of a matrix to build for multiple versions. However, I'm encountering an issue when the bash variable storing the array is evaluated.
jobs:
setup:
runs-on: ubuntu-latest
outputs:
versions: ${{ steps.matrix.outputs.value }}
steps:
- id: matrix
run: |
sudo apt-get install -y jq && \
MAINNET=$(curl https://api.mainnet-beta.solana.com -X POST -H "Content-Type: application/json" -d '{"jsonrpc":"2.0","id":1, "method":"getVersion"}' | jq '.result["solana-core"]') && \
TESTNET=$(curl https://api.testnet.solana.com -X POST -H "Content-Type: application/json" -d '{"jsonrpc":"2.0","id":1, "method":"getVersion"}' | jq '.result["solana-core"]') && \
VERSIONS=($MAINNET $TESTNET) && \
echo "${VERSIONS[#]}" && \
VERSION_JSON=$(echo "${VERSIONS[#]}" | jq -s) && \
echo $VERSION_JSON && \
echo '::set-output name=value::$VERSION_JSON'
shell: bash
- id: debug
run: |
echo "Result: ${{ steps.matrix.outputs.value }}"
changes:
needs: setup
runs-on: ubuntu-latest
# Set job outputs to values from filter step
outputs:
core: ${{ steps.filter.outputs.core }}
package: ${{ steps.filter.outputs.package }}
strategy:
matrix:
TEST: [buy, cancel, create_auction_house, delegate, deposit, execute_sale, sell, update_auction_house, withdraw_from_fee, withdraw_from_treasury, withdraw]
SOLANA_VERSION: ${{fromJson(needs.setup.outputs.versions)}}
steps:
- uses: actions/checkout#v2
# For pull requests it's not necessary to checkout the code
- uses: dorny/paths-filter#v2
id: filter
with:
filters: |
core:
- 'core/**'
package:
- 'auction-house/**'
- name: debug
id: debug
working-directory: ./auction-house/program
run: echo ${{ needs.setup.outputs.versions }}
In the setup job above, the two versions are evaluated to a bash array (in VERSIONS) and converted into a JSON array to be passed to the next job (in VERSION_JSON). The last echo in the matrix step results in a print of [ "1.10.31", "1.11.1" ], but the debug step prints out this:
Run echo "Result: "$VERSION_JSON""
echo "Result: "$VERSION_JSON""
shell: /usr/bin/bash -e {0}
env:
CARGO_TERM_COLOR: always
RUST_TOOLCHAIN: stable
Result:
The changes job also results in an error:
Error when evaluating 'strategy' for job 'changes'.
.github/workflows/program-auction-house.yml (Line: 44, Col: 25): Unexpected type of value '$VERSION_JSON', expected type: Sequence.
It definitely seems like the $VERSION_JSON variable isn't actually being evaluated properly, but I can't figure out where the evaluation is going wrong.

Answer 1

For echo '::set-output name=value::$VERSION_JSON' you need to use double quotes or bash would not expand $VERSION_JSON.
set-output is not happy with multi-lined data. For your case, you can use jq -s -c so the output will be one line.