From bba8216ceaf8183695b2ab84733c4deed5a42d93 Mon Sep 17 00:00:00 2001
From: Gato <cedric@goutailler-olivier.fr>
Date: Mon, 15 Jun 2026 06:52:10 +0200
Subject: [PATCH] =?UTF-8?q?feat(bonsai):=20invalidation=20s=C3=A9lective?=
 =?UTF-8?q?=20du=20cache=20via=20CACHEBUST?=
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Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
---
 bonsai/Dockerfile.api     | 1 +
 bonsai/Dockerfile.webapp  | 1 +
 bonsai/README.md          | 6 ++++--
 bonsai/docker-compose.yml | 4 ++++
 4 files changed, 10 insertions(+), 2 deletions(-)

diff --git a/bonsai/Dockerfile.api b/bonsai/Dockerfile.api
index fa9edde..187c820 100644
--- a/bonsai/Dockerfile.api
+++ b/bonsai/Dockerfile.api
@@ -2,6 +2,7 @@
 
 FROM eclipse-temurin:25-jdk AS builder
 RUN apt-get update && apt-get install -y git openssh-client && rm -rf /var/lib/apt/lists/*
+ARG CACHEBUST
 RUN --mount=type=secret,id=ssh_key \
     --mount=type=cache,target=/root/.gradle \
     mkdir -p /root/.ssh && \
diff --git a/bonsai/Dockerfile.webapp b/bonsai/Dockerfile.webapp
index b37911a..6f2ae69 100644
--- a/bonsai/Dockerfile.webapp
+++ b/bonsai/Dockerfile.webapp
@@ -2,6 +2,7 @@
 
 FROM node:22-alpine AS builder
 RUN apk add --no-cache git openssh
+ARG CACHEBUST
 RUN --mount=type=secret,id=ssh_key \
     --mount=type=cache,target=/root/.npm \
     mkdir -p /root/.ssh && \
diff --git a/bonsai/README.md b/bonsai/README.md
index 9197447..d7f9d88 100644
--- a/bonsai/README.md
+++ b/bonsai/README.md
@@ -34,13 +34,15 @@ docker compose up -d
 
 ## Mise à jour
 
-Pour rebuilder depuis le dernier commit de `main` :
+Pour rebuilder depuis le dernier commit de `main` (sans tout reconstruire) :
 
 ```bash
-docker compose build --no-cache
+CACHEBUST=$(date +%s) docker compose build
 docker compose up -d
 ```
 
+`CACHEBUST` invalide uniquement l'étape clone+build. Les couches précédentes (installation des outils, image de base) restent en cache — le build reste rapide.
+
 ## Arrêt
 
 ```bash
diff --git a/bonsai/docker-compose.yml b/bonsai/docker-compose.yml
index 2edaab2..7fe52de 100644
--- a/bonsai/docker-compose.yml
+++ b/bonsai/docker-compose.yml
@@ -26,6 +26,8 @@ services:
       dockerfile: Dockerfile.api
       secrets:
         - ssh_key
+      args:
+        CACHEBUST: ${CACHEBUST:-stable}
     container_name: bonsai-api
     restart: unless-stopped
     depends_on:
@@ -58,6 +60,8 @@ services:
       dockerfile: Dockerfile.webapp
       secrets:
         - ssh_key
+      args:
+        CACHEBUST: ${CACHEBUST:-stable}
     container_name: bonsai-webapp
     restart: unless-stopped
     depends_on: