Adds api.EnvoyPath to run a custom Envoy binary - #506
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`api.EnvoyPath` and `ENVOY_PATH` allow running a custom Envoy binary,
skipping version resolution and download entirely. This is useful for
validating pre-release or feature branch builds before they are
published to the versions registry.
For example, to validate a locally built Envoy:
ENVOY_PATH=/path/to/envoy func-e run -c envoy.yaml
Or via the Go API:
func_e.Run(ctx, args, api.EnvoyPath("/path/to/envoy"))
```bash
$ ENVOY_PATH=~/oss/envoy/bazel-bin/source/exe/envoy-static func-e run -- --version
starting: /Users/codefromthecrypt/oss/envoy/bazel-bin/source/exe/envoy-static ...
/Users/codefromthecrypt/oss/envoy/bazel-bin/source/exe/envoy-static version: b03da5f87bd4117eecab5c51d4e6d6be9cccc794/1.39.0-dev/Modified/DEBUG/BoringSSL
```
Relates to tetratelabs/built-on-envoy#406
Signed-off-by: Adrian Cole <adrian@tetrate.io>
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polish here was to weave in the excellent feedback in #505 (review) without a new PR |
anuraaga
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May 8, 2026
Co-authored-by: Anuraag (Rag) Agrawal <anuraaga@gmail.com>
codefromthecrypt
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May 8, 2026 05:01
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api.EnvoyPathandENVOY_PATHallow running a custom Envoy binary, skipping version resolution and download entirely. This is useful for validating pre-release or feature branch builds not in the envoy-versions registry.Relates to tetratelabs/built-on-envoy#406