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wonderful-lizard-93382

08/17/2023, 5:56 AM
Hello Infracost team! 👋 I am trying to use
config
feature to get a single comment for different environments of the same terraform folder (feeding different .tfvar files) on CircleCI. I followed docs https://www.infracost.io/docs/features/config_file/ and https://github.com/infracost/infracost-circleci and have somewhat working comment posted in PR. But this comment consists of duplicate pairs of my “projects”. I suspect this is because my baseline “project” has different path where it was estimated? Would appreciate any advise on how to make this look properly, i.e merged and get a proper diff? Thanks in advance 🤝
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white-airport-8778

08/17/2023, 6:25 AM
👋 Hi @wonderful-lizard-93382, two things to check: 1. Locally in your dev machine, when you run this, do you see the correct project list? i.e. no duplicates and the correct project paths/names?
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infracost generate config --repo-path=. \
    --template-path=infracost.yml.tmpl
2. In CircleCI, does the main branch have the same config file? i.e. in CircleCI it would be doing this:
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git clone $CIRCLE_REPOSITORY_URL --branch=$BASE_BRANCH --single-branch /tmp/base 

# Breakdown using generated config file from main branch
infracost generate config --repo-path=/tmp/base \
    --template-path=/tmp/base/infracost.yml.tmpl \
    --out-file=/tmp/base/infracost.yml

infracost breakdown --config-file=/tmp/base/infracost.yml \
                    --format=json \
                    --out-file=/tmp/infracost-base.json

# Diff using generated config file from feature branch
infracost generate config --repo-path=${TF_ROOT} \
    --template-path=${TF_ROOT}/infracost.yml.tmpl \
    --out-file=${TF_ROOT}/infracost.yml

infracost diff --config-file=${TF_ROOT}/infracost.yml \
               --format=json \
               --compare-to=/tmp/infracost-base.json \
               --out-file=/tmp/infracost.json

infracost comment --path=/tmp/infracost.json
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wonderful-lizard-93382

08/17/2023, 6:30 AM
Hello @white-airport-8778, thank you for such a quick response. In my setup I am generating the config file just from feature branch, and using it for both “base” and “feature” branches, I will generate them separately and check whether it helps 🤝
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white-airport-8778

08/17/2023, 1:26 PM
@wonderful-lizard-93382 sure, separately should work better for cases when the feature branch gets a new project that’s not on main
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wonderful-lizard-93382

08/17/2023, 2:22 PM
I fixed my build, thank you. I had to use
working_directory:
key in CircleCI config to run commands from relevant directories (one for BASE and one for FEATURE branches) also making sure “path” parameter in config file in project is set properly (it was “.” like in the example) thats what I think was the root of the issue. Resulting comment looks awesome!
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