使用 yq 将 yaml 文件读取到 vm 选项

Question

I have a simple values.yaml file witch has below data:

...
env:
   - name: GOOGLE_DNS_1
     value: 8.8.8.8
   - name: GOOGLE_DNS_2
     value: 8.8.4.4
   - name: RUN_VARIABLES
     value: "-Xms150m -Xmx300m"
...

I would like to construct a string using "yq"like

-DGOOGLE_DNS_1="8.8.8.8"
-DGOOGLE_DNS_2="8.8.4.4"
-Xms150m -Xms300m

To set my Java VM Options.

Answer 1

Using yq :

yq -r '.env | to_entries
       | (.[] | select(.value.name == "GOOGLE_DNS_1") | .value.value) as $dns1
       | (.[] | select(.value.name == "GOOGLE_DNS_2") | .value.value) as $dns2
       | (.[] | select(.value.name == "RUN_VARIABLES") | .value.value) as $jvmOpts
       | "-DGOOGLE_DNS_1=\"\($dns1)\" -DGOOGLE_DNS_2=\"\($dns2)\" \($jvmOpts)" '

this produces for your input:
-DGOOGLE_DNS_1="8.8.8.8" -DGOOGLE_DNS_2="8.8.4.4" -Xms150m -Xmx300m