Introduction

• Features: extension for git to manage multiple repositories or git submodules.
• Blazing-fast command line application written in Java and built on top of latest technologies:
  • native image from GraalVM to compile into machine code and run without JVM or JDK.
  • Java 21's Virtual Threads: lightweight threads that reduce the effort of writing, maintaining, and debugging high-throughput concurrent applications.
• Easy to use:
  • The app is completely bundled into a standalone executable file, no extra dependencies needed.
  • Add .gis-modules file if you need to manage multiple repos (not git submodules)
  • Run gis -h or gis <commands> -h for help

Build from source

Native image

(require docker/podman to build)

There are 2 GraalVM distributions: GraalVM CE and Mandrel. Since this app is written in Java completely, Mandrel is prefered.

Checking out repository and build

cd gis
podman build -t gis . || return 1; podman create --name dkgis_ gis:latest; podman cp dkgis_:/app/gis/gis .; podman rm -f dkgis_

After the steps above, an executable file named gis will be created under project directory.

Build without checking out repository

podman build -t gis https://github.com/nqminhuit/gis.git
podman create --name gis_ gis:latest
podman cp gis_:/app/gis/gis .
podman rm -f gis_

JVM

cd gis
mvn clean verify package

The executable jar file will be created at target/gis-<version>.jar

Debug

java -agentlib:jdwp=transport=dt_socket,address=9999,server=y,suspend=n -jar path/to/gis-<version>.jar

Usage

For more details, just run:

./gis --help

Generate completion for zsh:

./gis completion --directory ${fpath[1]}

Reload your zsh session, we can now press <TAB> for autocomplete.

Currently gis only support zsh for completion.

Config

Gis will read config from file at ~/.config/gis.config

Supported configs:

| key                     | description                                             | default value       |
|-------------------------+---------------------------------------------------------+---------------------|
| default_branches        | comma separated values indicate default branch values   | master,main,develop |
| feature_branch_prefixes | comma separated values indicate feature branch prefixes | feature/            |

Note: do NOT insert space into value part.

Don't:

master, main, develop

Do:

master,main,develop

example:

default_branches=master,main,develop
feature_branch_prefixes=feature/

The reason that value parsing is not that smart is because that we use default Java core package java.util.Properties to parse values. We prefer Java's core over extra dependencies.

Comparison

notes:

• git submodule commands do not take the root module into account, however gis does.
• the data was generated on the same repository, same machine.

status

command for generating the above numbers:

for i in {1..1000}; do { time git submodule foreach git status -sb --ignore-submodules; } 2>> git_st_report done
# took 28s638ms in total

for i in {1..1000}; do { time gis st; } 2>> gis_st_report done
# took 13s654ms in total

fetch

command for generating the above numbers:

for i in {1..100}; do { time git submodule foreach git fetch; } 2>> git_fe_report done
# took 29m43s442ms

for i in {1..100}; do { time gis fe; } 2>> gis_fe_report done
# took 5m11s832ms

Code quality

Use Sonarqube to analyze code:

podman run -d --name sonarqube -e SONAR_ES_BOOTSTRAP_CHECKS_DISABLE=true -p 9876:9000 docker.io/sonarqube:9.9.5-community

Then go to http://localhost:9876

• login (admin/admin), then change your password
• go to http://localhost:9876/projects and click "Add a project"
• choose "Manually"
• input "Project key" and "Display name" e.g., "gis" then click "Set Up"
• "Generate a token": enter a name for this token then click "Generate"
• you will get something like this: 302481a5dee289283af983ac713174e2f2ed13da. Click "Continue"
• as shown in the 2nd step, with maven:

  mvn sonar:sonar -Dsonar.projectKey=gis -Dsonar.host.url=http://localhost:9876 -Dsonar.login=302481a5dee289283af983ac713174e2f2ed13da

• after the maven command above succcess, you will have a dashboard about gis project

Performance

Performed automatically at: https://github.com/nqminhuit/gis-stress-test when:

1. any changes to gis master branch: will perform stress test on small dataset
2. when gis publishes a new release: will perform stress test on both small and large dataset