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envsubst -no-unset blows up on ${FOO:=} #61

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filip-zyzniewski opened this issue May 8, 2024 · 0 comments

filip-zyzniewski commented May 8, 2024

It seems that an empty default value is treated as if a default value has not been provided.

Expected:

~ $ go install github.com/a8m/envsubst/cmd/[email protected]
~ $ go/bin/envsubst -no-unset <<< 'value: ${FOO:=}'
value: 
~ $ echo $?
0
~ $

Got:

~ $ go install github.com/a8m/envsubst/cmd/[email protected]
~ $ go/bin/envsubst -no-unset <<< 'value: ${FOO:=}' 
variable ${FOO} not set

~ $ echo $?
1
~ $

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