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build: Build-metadata usage via go:embed#689

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1 change: 0 additions & 1 deletion.dockerignore
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@@ -1,6 +1,5 @@
.github
.vscode
script
third-party
.dockerignore
.gitignore
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7 changes: 5 additions & 2 deletions.github/workflows/go.yml
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@@ -1,5 +1,5 @@
name: Build and Test Go Project
on: [push, pull_request]
on: [push, pull_request]

permissions:
contents: read
Expand All@@ -9,7 +9,7 @@ jobs:
strategy:
fail-fast: false
matrix:
os: [ubuntu-latest, windows-latest, macos-latest]
os: [ubuntu-latest, windows-latest, macos-latest]

runs-on: ${{ matrix.os }}

Expand All@@ -28,5 +28,8 @@ jobs:
- name: Run unit tests
run: script/test

- name: Prepare build_info files
run: script/prepare-build-info

- name: Build
run: go build -v ./cmd/github-mcp-server
1 change: 1 addition & 0 deletions.gitignore
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@@ -1,5 +1,6 @@
.idea
cmd/github-mcp-server/github-mcp-server
cmd/github-mcp-server/build_info/*.txt

# VSCode
.vscode/*
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6 changes: 5 additions & 1 deletion.goreleaser.yaml
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Expand Up@@ -4,12 +4,16 @@ before:
hooks:
- go mod tidy
- go generate ./...
- mkdir -p cmd/github-mcp-server/build_info
- echo "{{.Commit}}" > cmd/github-mcp-server/build_info/commit.txt
- echo "{{.Date}}" > cmd/github-mcp-server/build_info/date.txt
- echo "{{.Version}}" > cmd/github-mcp-server/build_info/version.txt

builds:
- env:
- CGO_ENABLED=0
ldflags:
- -s -w -X main.version={{.Version}} -X main.commit={{.Commit}} -X main.date={{.Date}}
- -s -w
goos:
- linux
- windows
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4 changes: 2 additions & 2 deletions.vscode/launch.json
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Expand Up@@ -10,7 +10,7 @@
"request": "launch",
"mode": "auto",
"cwd": "${workspaceFolder}",
"program": "cmd/github-mcp-server/main.go",
"program": "./cmd/github-mcp-server",
"args": ["stdio"],
"console": "integratedTerminal",
},
Expand All@@ -20,7 +20,7 @@
"request": "launch",
"mode": "auto",
"cwd": "${workspaceFolder}",
"program": "cmd/github-mcp-server/main.go",
"program": "./cmd/github-mcp-server",
"args": ["stdio", "--read-only"],
"console": "integratedTerminal",
}
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8 changes: 4 additions & 4 deletionsDockerfile
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@@ -1,5 +1,4 @@
FROM golang:1.24.4-alpine AS build
ARG VERSION="dev"

# Set the working directory
WORKDIR /build
Expand All@@ -12,9 +11,10 @@ RUN --mount=type=cache,target=/var/cache/apk \
# go build automatically download required module dependencies to /go/pkg/mod
RUN --mount=type=cache,target=/go/pkg/mod \
--mount=type=cache,target=/root/.cache/go-build \
--mount=type=bind,target=. \
CGO_ENABLED=0 go build -ldflags="-s -w -X main.version=${VERSION} -X main.commit=$(git rev-parse HEAD) -X main.date=$(date -u +%Y-%m-%dT%H:%M:%SZ)" \
-o /bin/github-mcp-server cmd/github-mcp-server/main.go
--mount=type=bind,target=.,rw \
script/prepare-build-info && \
CGO_ENABLED=0 go build -ldflags="-s -w" \
-o /bin/github-mcp-server ./cmd/github-mcp-server

# Make a stage to run the app
FROM gcr.io/distroless/base-debian12
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35 changes: 35 additions & 0 deletionscmd/github-mcp-server/build_info.go
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@@ -0,0 +1,35 @@
package main

import (
"embed"
"fmt"
"strings"
)

//go:embed build_info/commit.txt build_info/date.txt build_info/version.txt
var versionFS embed.FS

type buildInfoStruct struct {
commit string
date string
version string
}

func (b buildInfoStruct) String() string {
return fmt.Sprintf("Commit: %s\nBuild Date: %s\nVersion: %s", b.commit, b.date, b.version)
}

var buildInfo = func() buildInfoStruct {
readFile := func(path, fallback string) string {
if content, err := versionFS.ReadFile(path); err == nil {
return strings.TrimSpace(string(content))
}
return fallback
}

return buildInfoStruct{
commit: readFile("build_info/commit.txt", "unknown commit"),
date: readFile("build_info/date.txt", "unknown date"),
version: readFile("build_info/version.txt", "unknown version"),
}
}()
1 change: 1 addition & 0 deletionscmd/github-mcp-server/build_info/commit.txt
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@@ -0,0 +1 @@
commit
1 change: 1 addition & 0 deletionscmd/github-mcp-server/build_info/date.txt
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@@ -0,0 +1 @@
date
1 change: 1 addition & 0 deletionscmd/github-mcp-server/build_info/version.txt
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@@ -0,0 +1 @@
version
43 changes: 43 additions & 0 deletionscmd/github-mcp-server/build_info_test.go
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@@ -0,0 +1,43 @@
package main

import (
"testing"

"github.com/stretchr/testify/assert"
)

func TestBuildInfoStruct_String(t *testing.T) {
tests := []struct {
name string
info buildInfoStruct
expected string
}{
{
name: "all fields populated",
info: buildInfoStruct{
commit: "abc123",
date: "2024-01-01",
version: "1.0.0",
},
expected: "Commit: abc123\nBuild Date: 2024-01-01\nVersion: 1.0.0",
},
{
name: "initialized struct",
info: buildInfoStruct{},
expected: "Commit: \nBuild Date: \nVersion: ",
},
}

for _, tt := range tests {
t.Run(tt.name, func(t *testing.T) {
result := tt.info.String()
assert.Equal(t, tt.expected, result)
})
}
}

func TestBuildInfo_Initialization(t *testing.T) {
assert.Equal(t, "commit", buildInfo.commit)
assert.Equal(t, "date", buildInfo.date)
assert.Equal(t, "version", buildInfo.version)
}
9 changes: 2 additions & 7 deletionscmd/github-mcp-server/main.go
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Expand Up@@ -13,17 +13,12 @@ import (
"github.com/spf13/viper"
)

// These variables are set by the build process using ldflags.
var version = "version"
var commit = "commit"
var date = "date"

var (
rootCmd = &cobra.Command{
Use: "server",
Short: "GitHub MCP Server",
Long: `A GitHub MCP server that handles various tools and resources.`,
Version:fmt.Sprintf("Version: %s\nCommit: %s\nBuild Date: %s", version, commit, date),
Version:buildInfo.String(),
}

stdioCmd = &cobra.Command{
Expand All@@ -46,7 +41,7 @@ var (
}

stdioServerConfig := ghmcp.StdioServerConfig{
Version: version,
Version:buildInfo.version,
Host: viper.GetString("host"),
Token: token,
EnabledToolsets: enabledToolsets,
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14 changes: 14 additions & 0 deletionscmd/github-mcp-server/main_test.go
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@@ -0,0 +1,14 @@
package main

import (
"testing"

"github.com/stretchr/testify/assert"
)

func Test_RootCmdVersion(t *testing.T) {
expectedVersion := buildInfo.String()
actualVersion := rootCmd.Version

assert.Equal(t, expectedVersion, actualVersion)
}
5 changes: 2 additions & 3 deletionsscript/get-discussions
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@@ -1,5 +1,4 @@
#!/bin/bash

# echo '{"jsonrpc":"2.0","id":3,"params":{"name":"list_discussions","arguments": {"owner": "github", "repo": "securitylab", "first": 10, "since": "2025-04-01T00:00:00Z"}},"method":"tools/call"}' | go run cmd/github-mcp-server/main.go stdio | jq .
echo '{"jsonrpc":"2.0","id":3,"params":{"name":"list_discussions","arguments": {"owner": "github", "repo": "securitylab", "first": 10, "since": "2025-04-01T00:00:00Z", "sort": "CREATED_AT", "direction": "DESC"}},"method":"tools/call"}' | go run cmd/github-mcp-server/main.go stdio | jq .

# echo '{"jsonrpc":"2.0","id":3,"params":{"name":"list_discussions","arguments": {"owner": "github", "repo": "securitylab", "first": 10, "since": "2025-04-01T00:00:00Z"}},"method":"tools/call"}' | go run ./cmd/github-mcp-server stdio | jq .
echo '{"jsonrpc":"2.0","id":3,"params":{"name":"list_discussions","arguments": {"owner": "github", "repo": "securitylab", "first": 10, "since": "2025-04-01T00:00:00Z", "sort": "CREATED_AT", "direction": "DESC"}},"method":"tools/call"}' | go run ./cmd/github-mcp-server stdio | jq .
2 changes: 1 addition & 1 deletionscript/get-me
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@@ -1,3 +1,3 @@
#!/bin/bash

echo '{"jsonrpc":"2.0","id":3,"params":{"name":"get_me"},"method":"tools/call"}' | go runcmd/github-mcp-server/main.go stdio | jq .
echo '{"jsonrpc":"2.0","id":3,"params":{"name":"get_me"},"method":"tools/call"}' | go run./cmd/github-mcp-server stdio | jq .
29 changes: 29 additions & 0 deletionsscript/prepare-build-info
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@@ -0,0 +1,29 @@

#!/bin/sh
set -eu

mkdir -p cmd/github-mcp-server/build_info

BUILD_DATE=$(date -u +%Y-%m-%dT%H:%M:%SZ)

if [ -n "${GITHUB_ACTIONS:-}" ]; then
# GitHub Actions context
COMMIT="${GITHUB_SHA}"

if [ "${GITHUB_EVENT_NAME}" = "push" ] && [ "${GITHUB_REF_TYPE}" = "tag" ]; then
VERSION="${GITHUB_REF_NAME}"
elif [ "${GITHUB_EVENT_NAME}" = "push" ]; then
VERSION="${GITHUB_REF_NAME}-${GITHUB_SHA}"
else
VERSION="pr-${GITHUB_EVENT_PULL_REQUEST_NUMBER}"
fi
else
# Local/Docker context
COMMIT=$(git rev-parse HEAD 2>/dev/null || echo 'unknown commit')
VERSION=$(git rev-parse --abbrev-ref HEAD 2>/dev/null || echo 'unknown version')
fi

# Write build info files
echo "${COMMIT}" > cmd/github-mcp-server/build_info/commit.txt
echo "${BUILD_DATE}" > cmd/github-mcp-server/build_info/date.txt
echo "${VERSION}" > cmd/github-mcp-server/build_info/version.txt
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