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Example yaml (ex.yaml): items:
- name: foo
place: nyc
- name: bar
place: sea
- name: blah
place: nyc
- name: xyz
place: san
- name: abc
place: sanscript: #!/usr/bin/bash
# limit and filter variable comes from user input (e.g. commandline)
limit=2
filter='.place != "nyc"'
for index in $(yq ".items | .[] | select($filter) | path | .[-1]" ./ex.yaml | head -n $limit)
do # Do something with the selected entries
name=$(yq ".items.$index | .name" ex.yaml)
place=$(yq ".items.$index | .place" ex.yaml)
echo "Hello $name, You live in $place."
doneIs there a better concise way to do the above? In particular, is it possible to replace Output: |
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Replies: 3 comments 2 replies
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You can do it in a single expression like this: Note the use of strenv/env rather than getting bash to interpolate the env variables in double quotes around the expression - this can simplify quoting in some cases, for instance here we can use double quotes in the expression fro strings. To get rid of the |
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Thanks for response. In my example,
In my original code, this was a problem because I loose the indexes of the selected entries in the original array. So it cannot be used further: What I want But using array slice, |
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ah I see - you need to do the slice as the last thing, after getting the path |
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[Unrelated] Got a panic when trying below with same yaml file. |
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:O you found a bug! will fix |
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You can do it in a single expression like this:
Note the use of strenv/env rather than getting bash to interpolate the env variables in double quotes around the expression - this can simplify quoting in some cases, for instance here we can use double quotes in the expression fro strings.
To get rid of the
head -n $limit- you can use the slice array operator (https://mikefarah.gitbook.io/yq/operators/slice-array) to pick the firstlimititems from the list. This means you need to wrap the results back into an ar…