Simplified package metadata management for Go packages.

• Manage package metadata as part of your code
• Quickly increment major.minor.patch versions in VERSION file
• Keep version in VERSION file in sync with package version metadata
• Pass version, git branch/commit, build date/user metadata via ldflags

This repository contains:

• github.com/greenpau/versioned: Go package (library)
• github.com/greenpau/versioned/cmd/versioned: Command-line package metadata management utility

• Getting Started
  • Increment MAJOR.MINOR.PATCH Versions
  • Makefile Usage
• Package Metadata
  • Golang
  • Python
  • Node.js, Javascript, Typescript
• Markdown Table of Contents
• License Header

First, install versioned:

go get -u github.com/greenpau/versioned/cmd/versioned

Browse to a repository and initialize VERSION file with versioned:

versioned -init

Display current version of the repo:

versioned

Update patch version in VERSION file:

$ versioned -patch
increased patch version by 1, current version: 1.0.1
updated version: 1.0.1, previous version: 1.0.0

Do the same operation silently:

versioned -patch -silent

Update minor version in VERSION file:

versioned -minor

Update major version in VERSION file:

versioned -major

Another way of using versioned is adding the following release step in a Makefile:

APP_NAME="myapp"
GIT_BRANCH:=$(shell git rev-parse --abbrev-ref HEAD -- | head -1)

release:
        @echo "Making release"
        @if [ $(GIT_BRANCH) != "master" ]; then echo "cannot release to non-master branch $(GIT_BRANCH)" && false; fi
        @git diff-index --quiet HEAD -- || ( echo "git directory is dirty, commit changes first" && false )
        @versioned -patch
        @git add VERSION
        @git commit -m 'updated VERSION file'
        @versioned -sync cmd/$(APP_NAME)/main.go
        @echo "Patched version"
        @git add cmd/$(APP_NAME)/main.go
        @git commit -m "released v`cat VERSION | head -1`"
        @git tag -a v`cat VERSION | head -1` -m "v`cat VERSION | head -1`"
        @git push
        @git push --tags
        @echo "If necessary, run the following commands:"
        @echo "  git push --delete origin v$(APP_VERSION)"
        @echo "  git tag --delete v$(APP_VERSION)"

For demonstration, please consider that a developer manages the following code as part of main.go:

package main

import (
        "flag"
        "fmt"
        "github.com/greenpau/versioned"
        "os"
)

var (
        app        *versioned.PackageManager
        appVersion string
        gitBranch  string
        gitCommit  string
        buildUser  string
        buildDate  string
)

func init() {
    app = versioned.NewPackageManager("myapp")
    app.Description = "MyApp"
    app.Documentation = "https://github.com/me/myapp"
    app.SetVersion(appVersion, "1.0.0")
    app.SetGitBranch(gitBranch, "master")
    app.SetGitCommit(gitCommit, "v1.0.0-dirty")
    app.SetBuildUser(buildUser, "")
    app.SetBuildDate(buildDate, "")
}

In the init() function, the developer initializer versioned package manager and sets default application name, description, and documentation. These do not change at runtime.

Next, notice the var section, where there are a number of string variable. At runtime, the values of the variables are not initialized. The values are empty strings.

One way to initialize them is using ldflags at build time. Here, the APP_VERSION variable is set to the value from VERSION file.

Then, the variable is being user to set main.appVersion. The main is the package in the code above and appVersion is the variable that are being set at build time.

APP_VERSION:=$(shell cat VERSION | head -1)
GIT_COMMIT:=$(shell git describe --dirty --always)
GIT_BRANCH:=$(shell git rev-parse --abbrev-ref HEAD -- | head -1)
BUILD_USER:=$(shell whoami)
BUILD_DATE:=$(shell date +"%Y-%m-%d")

        @CGO_ENABLED=0 go build -o bin/myapp -v \
                -ldflags="-w -s \
                -X main.appVersion=$(APP_VERSION) \
                -X main.gitBranch=$(GIT_BRANCH) \
                -X main.gitCommit=$(GIT_COMMIT) \
                -X main.buildUser=$(BUILD_USER) \
                -X main.buildDate=$(BUILD_DATE)" \
                -gcflags="all=-trimpath=$(GOPATH)/src" \
                -asmflags="all=-trimpath $(GOPATH)/src" cmd/mypapp/*.go

The end result os that the following variables are being set with values.

        appVersion string
        gitBranch  string
        gitCommit  string
        buildUser  string
        buildDate  string

However, what happen when a user does not use -ldflags.

In that case, versioned sets a number of defaults. For example, if appVersion is not being wtih -ldflags, then the default 1.0.0 will be set.

    app.SetVersion(appVersion, "1.0.0")
    app.SetGitBranch(gitBranch, "master")
    app.SetGitCommit(gitCommit, "v1.0.0-dirty")
    app.SetBuildUser(buildUser, "")
    app.SetBuildDate(buildDate, "")

A developer, prior to releasing code, would put proper defaults. This way when someone build the code, it would inherit a set of default values for version, git, and build metadata.

Further, the versioned can be used to update the default values.

versioned -sync cmd/myapp/main.go

The versioned inspects Python file for the presense of __version__ module level dunder (see PEP 8) and, if necessary, updates the version to match the one found in VERSION file.

The following command detects the code uses Python based on the .py extension and synchronizes the version.

versioned -sync requests.py

Alternatively, when a Python file does not have an extension, use --format to explicitly state the way the file should be handled.

versioned -sync app-client --format python

Additionally, if a file is a part of a Python package, then there is no need for VERSION file. Rather, use --source to indicate the source of truth for version information.

versioned --source setup.py -sync requests.py

The versioned inspects npm package file for version information. The following command displays the current version of a package.

$ versioned --source package.json
1.0.1

The following command patches the version to 1.0.2:

$ versioned --source package.json --patch
increased patch version by 1, current version: 1.0.2
updated version: 1.0.2, previous version: 1.0.1

As for the synchronization of the version in package.json and other files in the package, the following rules apply.

Consider creating src/Config.ts Typescript file.

export const Config = {
  Version: "1.0.0",
};

The versioned finds a reference to Version and syncronizes the value:

versioned --source package.json --sync src/Config.ts

After running the above command, the version in package.json and src/Config.ts will be identical.

export const Config = {
  Version: "1.0.2",
};

The versioned is capable of generating and updating of a Table of Contents (TOC) in Markdown README.md file.

The following command either generates or updates the Table of Contents in README.md file:

versioned --toc

Alternatively, specify Markdown file path:

versioned -toc -filepath ./another_doc.md

The versioned is capable of update license header. The default license type is Apache License 2.0:

versioned -addlicense -copyright="Paul Greenberg (greenpau@outlook.com)" -year=2020 -filepath ./main.go

The following command finds all .swift files and adds GPLv3 license header.

for src_file in `find ./ -type f -name '*.swift'`; do
  versioned -addlicense -copyright="Paul Greenberg (greenpau@outlook.com)" -year=2023 -license gpl3 -filepath=$src_file;
done

The available license headers are:

• mit
• asl
• apache
• gpl3

The following command removes license header from a file:

versioned -striplicense -filepath=toc_test.go