# Use multi-stage build to compile the Go project and run it in a minimal image
FROM golang:1.20-bullseye AS builder

# Enable module mode off (GOPATH-based) since this repo uses GOPATH layout
ENV GO111MODULE=off
ENV GOPATH=/go

# Set working directory to the repository path inside GOPATH
WORKDIR /go/src/github.com/gocircuit/circuit

# Copy all sources
COPY . .

# Install build-time dependencies
RUN apt-get update -qq && apt-get install -yqq --no-install-recommends git mercurial ca-certificates && rm -rf /var/lib/apt/lists/*

# Fetch dependencies and build the circuit binary
RUN go get -d ./... && \
    go build -o /go/bin/circuit ./cmd/circuit/main.go

# Runtime image
FROM debian:stable-slim

# Install minimal runtime dependencies
RUN apt-get update -qq && apt-get install -y --no-install-recommends ca-certificates && rm -rf /var/lib/apt/lists/*

# Copy the built binary
COPY --from=builder /go/bin/circuit /usr/local/bin/circuit

# Set default command to run circuit in server mode
# It will start listening on an interface and multicast discovery by default
CMD ["circuit","start","-if","eth0","-discover","228.8.8.8:8822"]

# Ignore VCS and node_modules and build artifacts
.git
node_modules
vendor
*.log
.DS_Store
**/__pycache__/
**/*.pyc
build/
bin/

- Exact error message and exit code
  - package slices: unrecognized import path "slices": import path does not begin with hostname
  - exit code: 1

- Failing command/step
  - [builder 5/5] RUN go get -d ./... &&     go build -o /go/bin/circuit ./cmd/circuit/main.go
  - Dockerfile:18

- Missing packages or files mentioned
  - Import path "slices" is unrecognized (import path does not begin with hostname) during go get, indicating a module-resolution issue rather than a missing file. This suggests an incorrect import path usage (standard library vs. module path) rather than a downloaded dependency.

- Version mismatch info
  - Go image: golang:1.20-bullseye (Go 1.20)
  - The error occurs while running go get for ./..., likely due to module-path handling of a standard library package (slices) under this Go version.

# Use multi-stage build to compile the Go project and run it in a minimal image
FROM golang:1.21-bullseye AS builder

# Enable module mode off (GOPATH-based) since this repo uses GOPATH layout
ENV GO111MODULE=off
ENV GOPATH=/go

# Set working directory to the repository path inside GOPATH
WORKDIR /go/src/github.com/gocircuit/circuit

# Copy all sources
COPY . .

# Install build-time dependencies
RUN apt-get update -qq && apt-get install -yqq --no-install-recommends git mercurial ca-certificates && rm -rf /var/lib/apt/lists/*

# Fetch dependencies and build the circuit binary
RUN go get -d ./... && \
    go build -o /go/bin/circuit ./cmd/circuit/main.go

# Runtime image
FROM debian:stable-slim

# Install minimal runtime dependencies
RUN apt-get update -qq && apt-get install -y --no-install-recommends ca-certificates && rm -rf /var/lib/apt/lists/*

# Copy the built binary
COPY --from=builder /go/bin/circuit /usr/local/bin/circuit

# Set default command to run circuit in server mode
# It will start listening on an interface and multicast discovery by default
CMD ["circuit","start","-if","eth0","-discover","228.8.8.8:8822"]

nix:
	go build -o $(GOPATH)/bin/circuit cmd/circuit/main.go cmd/circuit/server.go cmd/circuit/hmac.go \
		cmd/circuit/chan.go cmd/circuit/dns.go cmd/circuit/joinleave.go \
		cmd/circuit/ls.go cmd/circuit/wait.go cmd/circuit/util.go \
		cmd/circuit/start.go cmd/circuit/procdkr.go cmd/circuit/peek.go \
		cmd/circuit/load.go cmd/circuit/std.go cmd/circuit/recv.go

clean:
	rm $(GOPATH)/bin/circuit

- Exact error message and exit code
  - # github.com/urfave/cli
  - ../../urfave/cli/suggestions.go:95:17: cannot range over prefix (variable of type int)
  - Exit code: 1

- Failing command/step
  - RUN go get -d ./... &&     go build -o /go/bin/circuit ./cmd/circuit/main.go

- Missing packages or files mentioned
  - None explicitly mentioned as missing; the failure is a compile-time error in the urfave/cli library during go build.

- Version mismatch info
  - Builder uses Go 1.21 (golang:1.21-bullseye). The compile error in urfave/cli suggests a possible version/API mismatch between the urfave/cli library and Go 1.21 (suggesting an incompatible library API for the Go toolchain).

# Use multi-stage build to compile the Go project and run it in a minimal image
FROM golang:1.20-bullseye AS builder

# Disable module mode to rely on GOPATH-based workspace in this repository
ENV GO111MODULE=off
ENV GOPATH=/go

# Set working directory to the repository path inside GOPATH
WORKDIR /go/src/github.com/gocircuit/circuit

# Copy all sources
COPY . .

# Install build-time dependencies
RUN apt-get update -qq && apt-get install -yqq --no-install-recommends git mercurial ca-certificates && rm -rf /var/lib/apt/lists/*

# Build the circuit binary from source without fetching external modules
RUN go build -o /go/bin/circuit ./cmd/circuit/main.go

# Runtime image
FROM debian:stable-slim

# Install minimal runtime dependencies
RUN apt-get update -qq && apt-get install -y --no-install-recommends ca-certificates && rm -rf /var/lib/apt/lists/*

# Copy the built binary
COPY --from=builder /go/bin/circuit /usr/local/bin/circuit

# Set default command to run circuit in server mode
# It will start listening on an interface and multicast discovery by default
CMD ["circuit","start","-if","eth0","-discover","228.8.8.8:8822"]

Summary of Docker build error

- Exact error message and exit code
  - cmd/circuit/main.go:15:2: cannot find package "github.com/urfave/cli" in any of:
    - /usr/local/go/src/github.com/urfave/cli (from $GOROOT)
    - /go/src/github.com/urfave/cli (from $GOPATH)
  - The overall step failed with exit code 1 (as shown by: did not complete successfully: exit code: 1)

- Failing command/step
  - [builder 5/5] RUN go build -o /go/bin/circuit ./cmd/circuit/main.go
  - Dockerfile: line 18 (the Go build inside the builder stage)

- Missing packages or files mentioned
  - github.com/urfave/cli (not found in GOPATH or GOROOT)

- Version mismatch info
  - None detected. Base images involved: golang:1.20-bullseye and Debian stable-slim, but no explicit version mismatch is reported. The failure is due to a missing dependency/module, not a version conflict.

# Build the project using GOPATH-based workflow (as in the original repo)
FROM golang:1.20-bullseye AS builder

# Use GOPATH workspace
ENV GOPATH=/go
WORKDIR /go/src/github.com/gocircuit/circuit

# Copy source
COPY . .

# Install build-time dependencies
RUN apt-get update -qq && apt-get install -yqq --no-install-recommends git mercurial ca-certificates && rm -rf /var/lib/apt/lists/*

# Fetch dependencies and build using the project's Makefile
RUN make nix

# Runtime image
FROM debian:stable-slim

RUN apt-get update -qq && apt-get install -y --no-install-recommends ca-certificates && rm -rf /var/lib/apt/lists/*

# Copy the built binary from the builder
COPY --from=builder /go/bin/circuit /usr/local/bin/circuit

# Default command: run circuit in server mode, discover on multicast address by default
CMD ["circuit", "start", "-if", "eth0", "-discover", "228.8.8.8:8822"]

- Failing step: Failing command/step: RUN make nix (Dockerfile: line with make nix), in builder stage 5/5.

Exact error messages (first occurrences shown):
- cmd/circuit/server.go:17:2: no required module provides package github.com/gocircuit/circuit/client: go.mod file not found in current directory or any parent directory; see 'go help modules'
- cmd/circuit/ls.go:17:2: no required module provides package github.com/gocircuit/circuit/client/docker: go.mod file not found in current directory or any parent directory; see 'go help modules'
- cmd/circuit/start.go:18:2: no required module provides package github.com/gocircuit/circuit/element/docker: go.mod file not found in current directory or any parent directory; see 'go help modules'
- cmd/circuit/start.go:19:2: no required module provides package github.com/gocircuit/circuit/kit/assemble: go.mod file not found in current directory or any parent directory; see 'go help modules'
- cmd/circuit/load.go:22:2: no required module provides package github.com/gocircuit/circuit/kit/debug/kill: go.mod file not found in current directory or any parent directory; see 'go help modules'
- cmd/circuit/load.go:23:2: no required module provides package github.com/gocircuit/circuit/kit/lockfile: go.mod file not found in current directory or any parent directory; see 'go help modules'
- cmd/circuit/load.go:24:2: no required module provides package github.com/gocircuit/circuit/sys/lang: go.mod file not found in current directory or any parent directory; see 'go help modules'
- cmd/circuit/load.go:25:2: no required module provides package github.com/gocircuit/circuit/sys/tele: go.mod file not found in current directory or any parent directory; see 'go help modules'
- cmd/circuit/start.go:20:2: no required module provides package github.com/gocircuit/circuit/tissue: go.mod file not found in current directory or any parent directory; see 'go help modules'
- cmd/circuit/start.go:21:2: no required module provides package github.com/gocircuit/circuit/tissue/locus: go.mod file not found in current directory or any parent directory; see 'go help modules'
- cmd/circuit/start.go:22:2: no required module provides package github.com/gocircuit/circuit/use/circuit: go.mod file not found in current directory or any parent directory; see 'go help modules'
- cmd/circuit/server.go:11:2: no required module provides package github.com/gocircuit/circuit/use/n: go.mod file not found in current directory or any parent directory; see 'go help modules'
- cmd/circuit/server.go:12:2: no required module provides package github.com/pkg/errors: go.mod file not found in current directory or any parent directory; see 'go help modules'
- cmd/circuit/main.go:15:2: no required module provides package github.com/urfave/cli: go.mod file not found in current directory or any parent directory; see 'go help modules'

Final step failure
- Makefile result: [Makefile:2: nix] Error 1
- Docker: failed to build: failed to solve: process "/bin/sh -c make nix" did not complete successfully: exit code: 2

Missing packages/files mentioned
- go.mod/go module context missing for multiple modules, e.g.:
  - github.com/gocircuit/circuit/client
  - github.com/gocircuit/circuit/client/docker
  - github.com/gocircuit/circuit/element/docker
  - github.com/gocircuit/circuit/kit/assemble
  - github.com/gocircuit/circuit/kit/debug/kill
  - github.com/gocircuit/circuit/kit/lockfile
  - github.com/gocircuit/circuit/sys/lang
  - github.com/gocircuit/circuit/sys/tele
  - github.com/gocircuit/circuit/tissue
  - github.com/gocircuit/circuit/tissue/locus
  - github.com/gocircuit/circuit/use/circuit
  - github.com/gocircuit/circuit/use/n
  - github.com/pkg/errors
  - github.com/urfave/cli

Version mismatch info
- None explicit. The failure arises from missing go.mod/module context for required packages, not a specific version mismatch.

Summary: Build failed during dockerized nix target due to missing Go module context (go.mod) for numerous packages; the Docker build could not complete the RUN make nix step.

# Build the project using GOPATH-based workflow by placing the repo under /go/src
FROM golang:1.20-bullseye AS builder

# Use GOPATH workspace
ENV GOPATH=/go
WORKDIR /go/src

# Copy entire repository into the GOPATH workspace
COPY . .

# Install build-time dependencies
RUN apt-get update -qq && apt-get install -yqq --no-install-recommends git mercurial ca-certificates && rm -rf /var/lib/apt/lists/*

# Build the circuit binary from source using the GOPATH layout
RUN go build -o /go/bin/circuit github.com/gocircuit/circuit/cmd/circuit

# Runtime image
FROM debian:stable-slim

# Install minimal runtime dependencies
RUN apt-get update -qq && apt-get install -y --no-install-recommends ca-certificates && rm -rf /var/lib/apt/lists/*

# Copy the built binary
COPY --from=builder /go/bin/circuit /usr/local/bin/circuit

# Default command: run circuit in server mode, discover on multicast address by default
CMD ["circuit","start","-if","eth0","-discover","228.8.8.8:8822"]

Summary (under 1500 chars):

- Exact error message and exit code:
  no required module provides package github.com/gocircuit/circuit/cmd/circuit: go.mod file not found in current directory or any parent directory; see 'go help modules'
  Exit code: 1

- Failing command/step:
  [builder 5/5] RUN go build -o /go/bin/circuit github.com/gocircuit/circuit/cmd/circuit
  (Dockerfile: line showing the RUN)

- Missing packages or files mentioned:
  - go.mod file not found in current directory or any parent directory
  - Therefore: no required module provides package github.com/gocircuit/circuit/cmd/circuit

- Version mismatch / environment details:
  - Base images involved: golang:1.20-bullseye (Go) and debian:stable-slim
  - Dockerfile text indicates building with GOPATH layout, but Go 1.20 defaults to modules; the error indicates modules mode is active and no go.mod is present. This suggests a mismatch between GOPATH-based expectations and module-based build.
  - Potential fix: initialize a Go module (go mod init / go mod tidy) or disable modules (set GO111MODULE=off) to use GOPATH layout, depending on intent.

# Build the project using GOPATH-based workflow (module off)
FROM golang:1.20-bullseye AS builder

# Force GOPATH mode to align with repository layout
ENV GO111MODULE=off
ENV GOPATH=/go

# Work in the GOPATH source tree
WORKDIR /go/src/github.com/gocircuit/circuit

# Copy source code
COPY . .

# Install any needed build-time dependencies
RUN apt-get update -qq && apt-get install -yqq --no-install-recommends git mercurial ca-certificates && rm -rf /var/lib/apt/lists/*

# Build the circuit binary from source
RUN go build -o /go/bin/circuit ./cmd/circuit/main.go

# Runtime image
FROM debian:stable-slim

# Install minimal runtime dependencies
RUN apt-get update -qq && apt-get install -y --no-install-recommends ca-certificates && rm -rf /var/lib/apt/lists/*

# Copy the built binary
COPY --from=builder /go/bin/circuit /usr/local/bin/circuit

# Default command: run circuit in server mode, discover on multicast address by default
CMD ["circuit","start","-if","eth0","-discover","228.8.8.8:8822"]

- Failing step: [builder 5/5] RUN go build -o /go/bin/circuit ./cmd/circuit/main.go

- Exact error message and exit code:
  cmd/circuit/main.go:15:2: cannot find package "github.com/urfave/cli" in any of:
  	/usr/local/go/src/github.com/urfave/cli (from $GOROOT)
  	/go/src/github.com/urfave/cli (from $GOPATH)
  Dockerfile:18
  ERROR: failed to build: failed to solve: process "/bin/sh -c go build -o /go/bin/circuit ./cmd/circuit/main.go" did not complete successfully: exit code: 1

- Missing packages/files mentioned:
  - github.com/urfave/cli (not found in GOPATH or GOROOT)

- Version mismatch information:
  - No explicit version mismatch reported. The build uses Go from the builder image (golang:1.20-bullseye) but the error is missing dependency rather than a version conflict.

No matches found.

FROM golang:1.21-bullseye AS builder

# Build from GOPATH layout (the project appears to be GOPATH-based)
ENV GOPATH=/go/workspace
ENV GO111MODULE=off
ENV PATH=$PATH:/usr/local/go/bin:/go/workspace/bin
WORKDIR /go/workspace/src/github.com/gocircuit/circuit

# Copy source
COPY . ./

# Ensure workspace layout exists
RUN mkdir -p /go/workspace/src/github.com/gocircuit/circuit

# Resolve dependencies using GOPATH mode
RUN go env -w GOPATH=/go/workspace
RUN go get -d ./...

# Build the CLI binary (nix target style)
RUN go build -o /go/workspace/bin/circuit \
    ./cmd/circuit/main.go \
    ./cmd/circuit/server.go \
    ./cmd/circuit/hmac.go \
    ./cmd/circuit/chan.go \
    ./cmd/circuit/dns.go \
    ./cmd/circuit/joinleave.go \
    ./cmd/circuit/ls.go \
    ./cmd/circuit/wait.go \
    ./cmd/circuit/util.go \
    ./cmd/circuit/start.go \
    ./cmd/circuit/procdkr.go \
    ./cmd/circuit/peek.go \
    ./cmd/circuit/load.go \
    ./cmd/circuit/std.go \
    ./cmd/circuit/recv.go

FROM debian:bullseye-slim
RUN apt-get update -qq && apt-get install -y --no-install-recommends ca-certificates

COPY --from=builder /go/workspace/bin/circuit /usr/local/bin/circuit
RUN chmod +x /usr/local/bin/circuit

# Default to starting the circuit server on the default interface
CMD ["circuit","start","-if","eth0"]

# Ignore VCS and build artifacts
.git
.DS_Store
node_modules/
vendor/
$tmp
*.log
*.tmp
*.out
*.exe
bin/
"""

- Exact error message and exit code:
  - cannot range over prefix (variable of type int)
  - Location: ../../urfave/cli/suggestions.go:95:17
  - Exit code: 1

- Failing command/step:
  - RUN go build -o /go/workspace/bin/circuit \
    ./cmd/circuit/main.go \
    ./cmd/circuit/server.go \
    ./cmd/circuit/hmac.go \
    ./cmd/circuit/chan.go \
    ./cmd/circuit/dns.go \
    ./cmd/circuit/joinleave.go \
    ./cmd/circuit/ls.go \
    ./cmd/circuit/wait.go \
    ./cmd/circuit/util.go \
    ./cmd/circuit/start.go \
    ./cmd/circuit/procdkr.go \
    ./cmd/circuit/peek.go \
    ./cmd/circuit/load.go \
    ./cmd/circuit/std.go \
    ./cmd/circuit/recv.go

- Missing packages or files mentioned:
  - None explicitly mentioned as missing in the log.

- Version mismatch info:
  - No explicit version mismatch information is shown. The error is a compile-time type issue in urfave/cli (suggestions.go), which may imply an API/compatibility mismatch, but nothing explicit in the log.

FROM golang:1.21-bullseye AS builder

ENV GOPATH=/go/workspace
ENV PATH=$PATH:/usr/local/go/bin:/go/workspace/bin
ENV GO111MODULE=off
WORKDIR /go/workspace/src/github.com/gocircuit/circuit

# Copy source
COPY . ./

# Build using the project's Makefile nix target
RUN make nix

FROM debian:bullseye-slim
RUN apt-get update -qq && apt-get install -y --no-install-recommends ca-certificates

COPY --from=builder /go/workspace/bin/circuit /usr/local/bin/circuit
RUN chmod +x /usr/local/bin/circuit

CMD ["circuit","start","-if","eth0"]

FROM golang:1.21-bullseye AS builder

# Enable module mode and disable CGO for reproducible builds
ENV GO111MODULE=on
ENV CGO_ENABLED=0

WORKDIR /workspace

# Copy the whole repo
COPY . .

# If go.mod doesn't exist, initialize a module for this project
RUN if [ ! -f go.mod ]; then echo "module github.com/gocircuit/circuit" > go.mod; fi

# Pin a compatible version of urfave/cli (v1 compatible API)
RUN go get github.com/urfave/cli@v1.22.5

# Resolve and download dependencies
RUN go mod tidy

# Build the circuit binary from the main cmd directory
RUN go build -o /workspace/bin/circuit ./cmd/circuit

FROM debian:bullseye-slim

RUN apt-get update -qq && apt-get install -y --no-install-recommends ca-certificates

COPY --from=builder /workspace/bin/circuit /usr/local/bin/circuit
RUN chmod +x /usr/local/bin/circuit

CMD ["circuit","start","-if","eth0"]

FROM golang:1.21-bullseye AS builder

# Build using GOPATH mode for compatibility with this repository
ENV GOPATH=/go
ENV GO111MODULE=off
ENV CGO_ENABLED=0
WORKDIR /go/src/github.com/gocircuit/circuit

# Copy source code
COPY . .

# Build the project using the provided Makefile (nix target)
RUN make nix

FROM debian:bullseye-slim
RUN apt-get update -qq && apt-get install -y --no-install-recommends ca-certificates

# Copy the built binary from builder stage
COPY --from=builder /go/bin/circuit /usr/local/bin/circuit
RUN chmod +x /usr/local/bin/circuit

CMD ["circuit","start","-if","eth0"]

FROM golang:1.21-bullseye AS builder

# Use GOPATH layout for compatibility with the repository
ENV GOPATH=/go
ENV PATH=$PATH:/usr/local/go/bin:/go/bin
ENV GO111MODULE=on
ENV CGO_ENABLED=0

WORKDIR /go/src/github.com/gocircuit/circuit

# Copy source
COPY . .

# Initialize a module if none exists (to pin urfave/cli to a compatible v1)
RUN if [ ! -f go.mod ]; then echo "module github.com/gocircuit/circuit" > go.mod; fi

# Pin a compatible urfave/cli version (v1.x) and tidy
RUN go get github.com/urfave/cli@v1.22.5
RUN go mod tidy

# Build the project using the provided Makefile nix target
RUN make nix

FROM debian:bullseye-slim
RUN apt-get update -qq && apt-get install -y --no-install-recommends ca-certificates

# Copy the built binary from builder stage
COPY --from=builder /go/bin/circuit /usr/local/bin/circuit
RUN chmod +x /usr/local/bin/circuit

CMD ["circuit","start","-if","eth0"]

FROM golang:1.21-bullseye AS builder

# Build using GOPATH mode for compatibility with this repository
ENV GOPATH=/go
ENV GO111MODULE=off
ENV CGO_ENABLED=0
WORKDIR /go/src/github.com/gocircuit/circuit

# Copy source code
COPY . .

# Build the project using the provided Makefile nix target
RUN make nix

FROM debian:bullseye-slim
RUN apt-get update -qq && apt-get install -y --no-install-recommends ca-certificates

# Copy the built binary from builder stage
COPY --from=builder /go/bin/circuit /usr/local/bin/circuit
RUN chmod +x /usr/local/bin/circuit

CMD ["circuit","start","-if","eth0"]

FROM golang:1.21-bullseye AS builder

# Build using GOPATH mode for compatibility with this repository
ENV GOPATH=/go
ENV GO111MODULE=off
ENV CGO_ENABLED=0
WORKDIR /go/src/github.com/gocircuit/circuit

# Copy source code
COPY . .

# Pin a compatible urfave/cli version (v1.x) to avoid API incompatibilities
RUN go get github.com/urfave/cli@v1.22.5

# Build the project using the provided Makefile nix target
RUN make nix

FROM debian:bullseye-slim
RUN apt-get update -qq && apt-get install -y --no-install-recommends ca-certificates

# Copy the built binary from builder stage
COPY --from=builder /go/bin/circuit /usr/local/bin/circuit
RUN chmod +x /usr/local/bin/circuit

CMD ["circuit","start","-if","eth0"]

Summary (under 1500 chars):

- Failing step
  - [builder 4/5] RUN go get github.com/urfave/cli@v1.22.5

- Exact error message and exit code
  - go: can only use path@version syntax with 'go get' and 'go install' in module-aware mode
  - exit code: 1

- Missing packages or files mentioned
  - None mentioned

- Version/mismatch information
  - The Dockerfile pins urfave/cli to v1.22.5 (shown in the failing command)
  - A comment indicates intent to pin a compatible v1.x version to avoid API incompatibilities
  - The failure appears due to module-aware mode constraints, not a direct version mismatch

FROM golang:1.21-bullseye AS builder

# Build using GOPATH mode for compatibility with this repository
ENV GOPATH=/go
ENV GO111MODULE=off
ENV CGO_ENABLED=0

WORKDIR /go/src/github.com/gocircuit/circuit

# Copy source code
COPY . .

# Build the project using the provided Makefile nix target
RUN make nix

FROM debian:bullseye-slim
RUN apt-get update -qq && apt-get install -y --no-install-recommends ca-certificates

# Copy the built binary from builder stage
COPY --from=builder /go/bin/circuit /usr/local/bin/circuit
RUN chmod +x /usr/local/bin/circuit

CMD ["circuit","start","-if","eth0"]

FROM golang:1.20-bullseye AS builder

# Build using GOPATH mode for compatibility with this repository
ENV GOPATH=/go
ENV GO111MODULE=off

WORKDIR /go/src/github.com/gocircuit/circuit

# Copy source code
COPY . .

# Build the project using the provided Makefile nix target
RUN make nix

FROM debian:bullseye-slim
RUN apt-get update -qq && apt-get install -y --no-install-recommends ca-certificates

# Copy the built binary from builder stage
COPY --from=builder /go/bin/circuit /usr/local/bin/circuit
RUN chmod +x /usr/local/bin/circuit

CMD ["circuit","start","-if","eth0"]

Summary of Docker build error

- Failing step (exact command):
  [builder 4/4] RUN make nix
  Dockerfile line shows: RUN make nix

- Exact error message and exit code:
  process "/bin/sh -c make nix" did not complete successfully: exit code: 2
  From log:
  cmd/circuit/server.go:12:2: cannot find package "github.com/pkg/errors" in any of:
    /usr/local/go/src/github.com/pkg/errors (from $GOROOT)
    /go/src/github.com/pkg/errors (from $GOPATH)
  cmd/circuit/main.go:15:2: cannot find package "github.com/urfave/cli" in any of:
    /usr/local/go/src/github.com/urfave/cli (from $GOROOT)
    /go/src/github.com/urfave/cli (from $GOPATH)
  make: *** [Makefile:2: nix] Error 1

- Missing packages/files mentioned:
  - github.com/pkg/errors
  - github.com/urfave/cli
  Not found in GOPATH or GOROOT paths:
  /usr/local/go/src/... (from $GOROOT)
  /go/src/... (from $GOPATH)

- Version mismatch information:
  None explicitly reported. Environment shows Go 1.20 (golang:1.20-bullseye) and Debian bullseye-slim, but the error is missing dependencies rather than a version incompatibility. No explicit version mismatch noted in the log.

FROM golang:1.20-bullseye AS builder

# Build using GOPATH mode for compatibility with this repository
ENV GOPATH=/go
ENV GO111MODULE=off

WORKDIR /go/src/github.com/gocircuit/circuit

# Copy source code
COPY . .

# Ensure dependencies exist by fetching via GOPATH-style paths
RUN go get github.com/pkg/errors
RUN go get github.com/urfave/cli

# Build the project using the provided Makefile nix target
RUN make nix

FROM debian:bullseye-slim
RUN apt-get update -qq && apt-get install -y --no-install-recommends ca-certificates

# Copy the built binary from builder stage
COPY --from=builder /go/bin/circuit /usr/local/bin/circuit
RUN chmod +x /usr/local/bin/circuit

CMD ["circuit","start","-if","eth0"]

- Exact error message and exit code
  - Error: package slices: unrecognized import path "slices": import path does not begin with hostname
  - Exit code: 1

- Failing command/step
  - [builder 5/6] RUN go get github.com/urfave/cli

- Missing packages or files mentioned
  - No explicit missing file; the issue is an invalid import path for the Go toolchain ("slices" not recognized)

- Version mismatch info
  - Using golang:1.20-bullseye (Go 1.20)
  - The error arises because the code imports the standard library package slices (introduced in Go 1.21), causing a mismatch with Go 1.20

- Likely cause and quick fix (optional)
  - Cause: Go version mismatch between code expectations and toolchain (Go 1.21+ required for the slices package)
  - Fix: upgrade Go to 1.21+ or use dependencies compatible with Go 1.20 (e.g., avoid importing slices as a standard library package in that Go version)

FROM golang:1.21-bullseye AS builder

# Build using GOPATH mode for compatibility with this repository
ENV GOPATH=/go
ENV GO111MODULE=off

WORKDIR /go/src/github.com/gocircuit/circuit

# Copy source code
COPY . .

# Ensure dependencies exist by fetching via GOPATH-style paths
RUN go get github.com/pkg/errors
RUN go get github.com/urfave/cli

# Build the project using the provided Makefile nix target
RUN make nix

FROM debian:bullseye-slim
RUN apt-get update -qq && apt-get install -y --no-install-recommends ca-certificates

# Copy the built binary from builder stage
COPY --from=builder /go/bin/circuit /usr/local/bin/circuit
RUN chmod +x /usr/local/bin/circuit

CMD ["circuit","start","-if","eth0"]

- Exact error message and exit code
  - ../../urfave/cli/suggestions.go:95:17: cannot range over prefix (variable of type int)
  - ERROR: process "/bin/sh -c go get github.com/urfave/cli" did not complete successfully: exit code: 1

- Failing command/step
  - [builder 5/6] RUN go get github.com/urfave/cli

- Missing packages or files mentioned
  - None specified; the failure is a compilation/type error in the urfave/cli source during go get, not a missing package/file.

- Version mismatch info
  - The build uses golang:1.21-bullseye (Go 1.21) as the builder image. The error arises during fetching/compiling github.com/urfave/cli under that Go version, indicating a possible incompatibility in that module with Go 1.21, but no explicit version mismatch is stated in the log.

FROM golang:1.21-bullseye AS builder

# Build using GOPATH mode for compatibility with this repository
ENV GOPATH=/go
ENV GO111MODULE=off

WORKDIR /go/src/github.com/gocircuit/circuit

# Copy source code
COPY . .

# Build the project using the provided Makefile nix target
RUN make nix

FROM debian:bullseye-slim
RUN apt-get update -qq && apt-get install -y --no-install-recommends ca-certificates

# Copy the built binary from builder stage
COPY --from=builder /go/bin/circuit /usr/local/bin/circuit
RUN chmod +x /usr/local/bin/circuit

CMD ["circuit","start","-if","eth0"]

- Failing step (and exact command):
  - [builder 4/4] RUN make nix
  - Dockerfile:13
  - ERROR: process "/bin/sh -c make nix" did not complete successfully: exit code: 2
  - make: *** [Makefile:2: nix] Error 1

- Exact error messages and exit code to preserve:
  - ERROR: process "/bin/sh -c make nix" did not complete successfully: exit code: 2
  - cmd/circuit/server.go:12:2: cannot find package "github.com/pkg/errors" in any of:
  - /usr/local/go/src/github.com/pkg/errors (from $GOROOT)
  - /go/src/github.com/pkg/errors (from $GOPATH)
  - cmd/circuit/main.go:15:2: cannot find package "github.com/urfave/cli" in any of:
  - /usr/local/go/src/github.com/urfave/cli (from $GOROOT)
  - /go/src/github.com/urfave/cli (from $GOPATH)

- Missing packages/files causing the failure:
  - github.com/pkg/errors
  - github.com/urfave/cli

- Version mismatch information:
  - None explicitly shown. The build uses golang:1.21-bullseye (builder) and debian:bullseye-slim (base), but the failure is due to missing Go dependencies, not a version mismatch.

- Context / quick fix suggestions:
  - Ensure go.mod exists and dependencies are downloaded (go mod download or go mod vendor).
  - Verify module imports and that the required packages are available in the module graph.

FROM golang:1.21-bullseye AS builder

# Build using Go modules to modernize and simplify dependency handling
ENV GOPATH=/go
ENV GO111MODULE=on
ENV CGO_ENABLED=0

WORKDIR /go/src/github.com/gocircuit/circuit

# Copy source code
COPY . .

# Initialize a module if none exists and tidy dependencies
RUN if [ ! -f go.mod ]; then echo "module github.com/gocircuit/circuit" > go.mod; fi
RUN go mod tidy

# Build the project using the provided Makefile nix target
RUN make nix

FROM debian:bullseye-slim
RUN apt-get update -qq && apt-get install -y --no-install-recommends ca-certificates

# Copy the built binary from builder stage
COPY --from=builder /go/bin/circuit /usr/local/bin/circuit
RUN chmod +x /usr/local/bin/circuit

CMD ["circuit","start","-if","eth0"]