#!/usr/bin/env bash

# This script ensures that the same version of Go is referenced in all of the

# following files:

# - go.mod

# - mise.toml (the dogfood image installs from this manifest)

# - flake.nix

# The version of Go in go.mod is considered the source of truth.

set -euo pipefail

# shellcheck source=scripts/lib.sh

source "$(dirname "${BASH_SOURCE[0]}")/lib.sh"

cdroot

# At the time of writing, Nix only has go 1.22.x.

# We don't want to fail the build for this reason.

IGNORE_NIX=${IGNORE_NIX:-false}

GO_VERSION_GO_MOD=$(grep -Eo 'go [0-9]+\.[0-9]+\.[0-9]+' ./go.mod | cut -d' ' -f2)

GO_VERSION_MISE_TOML=$(grep -Eo '^go = "[0-9]+\.[0-9]+\.[0-9]+"' ./mise.toml | sed -E 's/.*"([^"]+)"/\1/')

GO_VERSION_FLAKE_NIX=$(grep -Eo '\bgo_[0-9]+_[0-9]+\b' ./flake.nix)

# Convert to major.minor format.

GO_VERSION_FLAKE_NIX_MAJOR_MINOR=$(echo "$GO_VERSION_FLAKE_NIX" | cut -d '_' -f 2-3 | tr '_' '.')

log "INFO : go.mod : $GO_VERSION_GO_MOD"

log "INFO : mise.toml : $GO_VERSION_MISE_TOML"

log "INFO : flake.nix : $GO_VERSION_FLAKE_NIX_MAJOR_MINOR"

if [ "$GO_VERSION_GO_MOD" != "$GO_VERSION_MISE_TOML" ]; then

error "Go version mismatch between go.mod and mise.toml"

fi

# At the time of writing, Nix only constrains the major.minor version.

# We need to check that specifically.

if [ "$IGNORE_NIX" = "false" ]; then

GO_VERSION_GO_MOD_MAJOR_MINOR=$(echo "$GO_VERSION_GO_MOD" | cut -d '.' -f 1-2)

if [ "$GO_VERSION_FLAKE_NIX_MAJOR_MINOR" != "$GO_VERSION_GO_MOD_MAJOR_MINOR" ]; then

error "Go version mismatch between go.mod and flake.nix"

fi

else

log "INFO : Ignoring flake.nix, as IGNORE_NIX=${IGNORE_NIX}"

fi

log "Go version check passed, all versions are $GO_VERSION_GO_MOD"