¿Qué problema resuelve Git?

Imagina que tienes un archivo:
main.py
Hoy funciona.
Mañana haces cambios.
Pasado mañana algo deja de funcionar.
Sin Git:

No sabes qué cambió.
No sabes cuándo cambió.
No sabes quién lo cambió.
No puedes volver fácilmente atrás. Git resuelve eso. Piensa en Git como una máquina del tiempo para tu código. --- ## Conceptos fundamentales ### Repositorio Un repositorio es el proyecto completo. Ejemplo: repositorio_proyecto Contiene:

README.md
src/
test/
docs/
scripts/

Git almacena el historial de todos esos archivos.

Commit

Un commit es una fotografía del proyecto.
Ejemplo:

Commit #1
 README creado

Luego:

Commit #2
 Terraform inicial

Luego:

Commit #3
 Bucket S3 agregado

Cada commit permite regresar a ese estado.
Piensa en ellos como puntos de guardado de un videojuego.

Branch

Una branch (rama) es una línea de trabajo independiente.
Ejemplo:
main
contiene v1 estable
Quieres agregar S3
Creas:
feature/s3-bucket
Trabajas ahí. Si algo sale mal:
main
permanece intacto.

¿Por qué no trabajar directamente sobre main?

Porque main debe ser siempre estable.
Regla profesional:
Nunca desarrollar directamente en main

## Flujo profesional
### main
Código estable.
### develop
Integración.
### feature/*
Desarrollo.

Visualmente:

main
 │
 └── develop
 │
 ├── feature/s3
 │
 ├── feature/budget
 │
 └── feature/iam

Crear SSH

¿Por qué?
Para evitar escribir usuario y contraseña constantemente.
Generar clave:

ssh-keygen-ted25519-C"correo@gmail.com"

Resultado:

C:\Users\TuUsuario\.ssh\

Archivos:

id_ed25519
id_ed25519.pub

Nunca compartir id_ed25519
Sí compartir id_ed25519.pub

Agregar SSH a GitHub

Copiar:

type$env:USERPROFILE\.ssh\id_ed25519.pub

Ir a GitHub:

Settings
↓
SSH and GPG Keys
↓
New SSH Key

Pegar contenido.

Verificar conexión

ssh-Tgit@github.com

Respuesta esperada:

Hi usuario!
You've successfully authenticated.

Crear repositorio

En GitHub:

repositorio_proyecto

Opciones:
✔ Private
✔ README
✔ License

Clonar repositorio

Con GitHub Desktop:

File
↓
Clone Repository

Seleccionar:

repositorio_proyecto

Ubicación:
C:\Projects
Resultado:
C:\Projects\repositorio_proyecto

Abrir en VS Code

Dentro del directorio:
code .

Crear rama develop

Primera vez:

`git checkout -b develop`

Subir:

`git push -u origin develop`

¿Por qué?
Porque main será producción.
develop será integración.

Subir cambios

git push

Pull Request

GitHub:

feature/feature-branch
↓
develop

¿Por qué?
Permite revisar antes de integrar.

Merge

Cuando la revisión es aprobada:

feature/feature-branch
↓
develop

Posteriormente:

develop
↓
main

Branch Protection

Configurar en GitHub:

Settings
↓
Branches
↓
Add Rule

Para:
main
Activar:
✔ Require Pull Request
✔ Require Status Checks
✔ Require Branch Up To Date
¿Por qué?
Evita errores accidentales.

Flujo diario del proyecto

Cada vez que trabajes:

git checkout develop
git pull

Crear nueva rama:
git checkout -b feature/nombre
Trabajar.
Guardar:

gitadd.gitcommit-m"feat: descripcion"

Subir `git push`

Crear Pull Request.
Integrar.
Eliminar rama.

Mentalidad correcta

No pienses:

Git guarda archivos

Piensa:

Git guarda historia

La historia del proyecto será tan valiosa como el código mismo porque permitirá entender:

¿Qué se hizo?
¿Cuándo se hizo?
¿Por qué se hizo?
¿Quién lo hizo?
Cómo volver atrás si algo falla.

Esa disciplina será especialmente importante.

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GIT cheatsheet:

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GitHub:

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URL: https://dev.to/erixero/github-2ki3

⇱ GitHub - DEV Community

¿Qué problema resuelve Git?

Commit

Branch

¿Por qué no trabajar directamente sobre main?

Crear SSH

Agregar SSH a GitHub

Verificar conexión

Crear repositorio

Clonar repositorio

Abrir en VS Code

Crear rama develop

`git checkout -b develop`

`git push -u origin develop`

Subir cambios

Pull Request

Merge

Branch Protection

Flujo diario del proyecto

Subir `git push`

Mentalidad correcta

Further Reading

GIT

URL: https://dev.to/erixero/github-2ki3

⇱ GitHub - DEV Community

¿Qué problema resuelve Git?

Commit

Branch

¿Por qué no trabajar directamente sobre main?

Crear SSH

Agregar SSH a GitHub

Verificar conexión

Crear repositorio

Clonar repositorio

Abrir en VS Code

Crear rama develop

git checkout -b develop

git push -u origin develop

Subir cambios

Pull Request

Merge

Branch Protection

Flujo diario del proyecto

Subir git push

Mentalidad correcta

Further Reading

GIT

`git checkout -b develop`

`git push -u origin develop`

Subir `git push`