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docs: add notice about fetch-depth into README

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Signed-off-by: Timofey Kirillov <timofey.kirillov@flant.com>
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Timofey Kirillov
2022-10-21 12:29:59 +03:00
parent c5e105e95e
commit 95ff181e6a
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README.md
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@@ -256,6 +256,23 @@ werf:
WERF_ENV: production
```
# FAQ
## werf always rebuilds images on new commit
Make sure to use `fetch-depth: 0` setting in the checkout action, like follows:
```
- name: Checkout code
uses: actions/checkout@v2
with:
fetch-depth: 0
```
By default fetch-depth set to `1` which disables git history when checking out code. werf cache selection algorithm uses git history to determine whether some image bound to some commit could be used as a cache when building current commit (current commit should be descendant to the cache commit).
Setting `fetch-depth` to `0` enables full fetch of git history and it is a **recommended** approach. It is also possible to limit fetch history with some decent number of commits, which would enable images caching limited to that number of commits, but this would have a negative impact on cache reproducibility.
# License
Apache License 2.0, see [LICENSE](LICENSE)