Compiling from the source package fails with the error: "/internal/tools/tools.go: No such file or directory"

[thehaven]

Describe the bug
Compiling from the source package fails with the error:

/bin/bash: line 1: /internal/tools/tools.go: No such file or directory

This seems to be because SRC_ROOT requires a git based checkout as per:

Makefile.Common
14:# SRC_ROOT is the top of the source tree.
15:SRC_ROOT := $(shell git rev-parse --show-toplevel)
17:TOOLS_MOD_DIR   := $(SRC_ROOT)/internal/tools
18:TOOLS_BIN_DIR   := $(SRC_ROOT)/.tools

When git rev-parse --show-toplevel fails to run SRC_ROOT="" and the pathing gets screwed up.

Steps to reproduce

Download and run make:

❯ curl --proto '=https' --tlsv1.2 -fOL https://github.com/open-telemetry/opentelemetry-collector/archive/refs/tags/v0.99.0.tar.gz && tar -xvzf v0.99.0.tar.gz
❯ cd opentelemetry-collector-0.99.0
❯ make
go: downloading github.com/stretchr/testify v1.9.0
go: downloading go.opentelemetry.io/contrib/config v0.5.0
go: downloading google.golang.org/grpc v1.63.2
go: downloading go.uber.org/multierr v1.11.0
go: downloading go.uber.org/zap v1.27.0
go: downloading github.com/hashicorp/go-version v1.6.0
go: downloading github.com/shirou/gopsutil/v3 v3.24.3
go: downloading go.opentelemetry.io/otel/metric v1.25.0
go: downloading go.opentelemetry.io/otel/trace v1.25.0
go: downloading go.opentelemetry.io/otel v1.25.0
go: downloading github.com/json-iterator/go v1.1.12
go: downloading github.com/davecgh/go-spew v1.1.1
go: downloading github.com/pmezard/go-difflib v1.0.0
go: downloading gopkg.in/yaml.v3 v3.0.1
go: downloading go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracegrpc v1.25.0
go: downloading go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracehttp v1.25.0
go: downloading go.opentelemetry.io/otel/exporters/otlp/otlptrace v1.25.0
go: downloading go.opentelemetry.io/otel/exporters/stdout/stdouttrace v1.25.0
go: downloading go.opentelemetry.io/otel/sdk/metric v1.25.0
go: downloading go.opentelemetry.io/otel/sdk v1.25.0
go: downloading github.com/go-viper/mapstructure/v2 v2.0.0-alpha.1
go: downloading github.com/knadh/koanf/maps v0.1.1
go: downloading github.com/knadh/koanf/providers/confmap v0.1.0
go: downloading github.com/knadh/koanf/v2 v2.1.1
go: downloading github.com/gogo/protobuf v1.3.2
go: downloading github.com/modern-go/concurrent v0.0.0-20180306012644-bacd9c7ef1dd
go: downloading github.com/modern-go/reflect2 v1.0.2
go: downloading golang.org/x/sys v0.18.0
go: downloading go.opentelemetry.io/proto/otlp v1.2.0
go: downloading google.golang.org/genproto/googleapis/rpc v0.0.0-20240401170217-c3f982113cda
go: downloading google.golang.org/protobuf v1.33.0
go: downloading github.com/mitchellh/copystructure v1.2.0
go: downloading github.com/go-logr/logr v1.4.1
go: downloading github.com/cenkalti/backoff/v4 v4.3.0
go: downloading golang.org/x/net v0.23.0
go: downloading github.com/grpc-ecosystem/grpc-gateway/v2 v2.19.1
go: downloading github.com/go-logr/stdr v1.2.2
go: downloading github.com/mitchellh/reflectwalk v1.0.2
go: downloading google.golang.org/genproto/googleapis/api v0.0.0-20240227224415-6ceb2ff114de
go: downloading golang.org/x/text v0.14.0
fatal: not a git repository (or any parent up to mount point /storage)
Stopping at filesystem boundary (GIT_DISCOVERY_ACROSS_FILESYSTEM not set).
/bin/bash: line 1: /internal/tools/tools.go: No such file or directory
make: *** No rule to make target '/.tools/addlicense', needed by 'checklicense'.  Stop.

What did you expect to see?
Checking out the git repo, switching to tag v0.99.0 and running make works just fine. I expected it to work from package source as well.

[mx-psi]

@thehaven Note that make will eventually (after running tests and linters) build a test version of the Collector.

If you want to build a (usable on prod) Collector from source I would recommend using the Collector builder. By default it will generate a binary, but you can also use --skip-compilation to generate the code, inspect it and then build it yourself

[thehaven]

Thanks, I will take a look.