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Update README with clearer info about cache-hit and its value #961

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Merged
merged 3 commits into from
Oct 26, 2022
Merged

Update README with clearer info about cache-hit and its value #961

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5294b3f
Update README.md
kotewar Oct 18, 2022
083fb30
Merge branch 'main' into kotewar/doc-update
kotewar Oct 26, 2022
14f2d18
Moved recommendation to skipping steps section
kotewar Oct 26, 2022
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11 changes: 6 additions & 5 deletions README.md
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Expand Up @@ -34,17 +34,18 @@ If you are using this inside a container, a POSIX-compliant `tar` needs to be in

* `path` - A list of files, directories, and wildcard patterns to cache and restore. See [`@actions/glob`](https://github.com/actions/toolkit/tree/main/packages/glob) for supported patterns.
* `key` - An explicit key for restoring and saving the cache
* `restore-keys` - An ordered list of prefix-matched keys to use for restoring stale cache if no cache hit occurred for key. Note
`cache-hit` returns false in this case.
* `restore-keys` - An ordered list of prefix-matched keys to use for restoring stale cache if no cache hit occurred for key.

#### Environment Variables
* `SEGMENT_DOWNLOAD_TIMEOUT_MINS` - Segment download timeout (in minutes, default `60`) to abort download of the segment if not completed in the defined number of minutes. [Read more](#cache-segment-restore-timeout)

### Outputs

* `cache-hit` - A boolean value to indicate an exact match was found for the key
* `cache-hit` - A boolean value to indicate an exact match was found for the key.

> See [Skipping steps based on cache-hit](#Skipping-steps-based-on-cache-hit) for info on using this output
> Note: `cache-hit` will be set to `true` only when cache hit occurs for the exact `key` match. For a partial key match via `restore-keys` or a cache miss, it will be set to `false`.

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.
Expand Down Expand Up @@ -152,7 +153,7 @@ A repository can have up to 10GB of caches. Once the 10GB limit is reached, olde

## Skipping steps based on cache-hit

Using the `cache-hit` output, subsequent steps (such as install or build) can be skipped when a cache hit occurs on the key.
Using the `cache-hit` output, subsequent steps (such as install or build) can be skipped when a cache hit occurs on the key. It is recommended to install the missing/updated dependencies in case of a partial key match when the key is dependent on the `hash` of the package file.

Example:
```yaml
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