actions/cache
1
0
Fork 0
mirror of https://github.com/actions/cache.git synced 2024-11-21 17:31:27 +01:00
Code Issues Projects Releases Packages Wiki Activity

Add more details to version section in readme (#971)

Browse source 
* Add more details to version section in readme

* Update README.md

Co-authored-by: Sankalp Kotewar <98868223+kotewar@users.noreply.github.com>

* Use ubuntu/squid instead of datadog/squid

Co-authored-by: Sankalp Kotewar <98868223+kotewar@users.noreply.github.com>
This commit is contained in:
Bishal Prasad 2022-11-07 15:42:42 +05:30 committed by GitHub
parent d0af8a3ecc
commit 9a6a4f6079
No known key found for this signature in database
GPG key ID: 4AEE18F83AFDEB23
1 changed files with 8 additions and 3 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

11
README.md
View file

@ -48,7 +48,7 @@ If you are using this inside a container, a POSIX-compliant `tar` needs to be in
See [Skipping steps based on cache-hit](#skipping-steps-based-on-cache-hit) for info on using this output
### Cache scopes
The cache is scoped to the key and branch. The default branch cache is available to other branches.
The cache is scoped to the key, [version](#cache-version) and branch. The default branch cache is available to other branches.
See [Matching a cache key](https://help.github.com/en/actions/configuring-and-managing-workflows/caching-dependencies-to-speed-up-workflows#matching-a-cache-key) for more info.
@ -175,9 +175,13 @@ steps:
## Cache Version
Cache version is unique for a combination of compression tool used for compression of cache (Gzip, Zstd, etc based on runner OS) and the path of directories being cached. If two caches have different versions, they are identified as unique cache entries. This also means that a cache created on `windows-latest` runner can't be restored on `ubuntu-latest` as cache `Version`s are different.
Cache version is a hash [generated](https://github.com/actions/toolkit/blob/500d0b42fee2552ae9eeb5933091fe2fbf14e72d/packages/cache/src/internal/cacheHttpClient.ts#L73-L90) for a combination of compression tool used (Gzip, Zstd, etc. based on the runner OS) and the `path` of directories being cached. If two caches have different versions, they are identified as unique caches while matching. This for example, means that a cache created on `windows-latest` runner can't be restored on `ubuntu-latest` as cache `Version`s are different.
Example: Below example will create 3 unique caches with same keys. Ubuntu and windows runners will use different compression technique and hence create two different caches. And `build-linux` will create two different caches as the `paths` are different.
> Pro tip: [List caches](https://docs.github.com/en/rest/actions/cache#list-github-actions-caches-for-a-repository) API can be used to get the version of a cache. This can be helpful to troubleshoot cache miss due to version.
<details>
<summary>Example</summary>
The workflow will create 3 unique caches with same keys. Ubuntu and windows runners will use different compression technique and hence create two different caches. And `build-linux` will create two different caches as the `paths` are different.
```yaml
jobs:
@ -224,6 +228,7 @@ jobs:
if: steps.cache-primes.outputs.cache-hit != 'true'
run: ./generate-primes -d prime-numbers
```
</details>
## Known practices and workarounds
Following are some of the known practices/workarounds which community has used to fulfill specific requirements. You may choose to use them if suits your use case. Note these are not necessarily the only or the recommended solution.