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Dev container feature - allow installing extensions #6460

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Add extensions option to the azd devcontainer feature to allow specif…
stuartleeks Jan 7, 2026
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stuartleeks Jan 7, 2026
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12 changes: 12 additions & 0 deletions ext/devcontainer/Makefile
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Original file line number Diff line number Diff line change
@@ -0,0 +1,12 @@
.PHONY: test

help: ## show this help
@grep -E '^[a-zA-Z0-9_-]+:.*?## .*$$' $(MAKEFILE_LIST) \
| awk 'BEGIN {FS = ":.*?## "}; {printf "\033[36m%s\033[0m|%s\n", $$1, $$2}' \
| column -t -s '|'

install-devcontainer-cli:
@if ! [ -x "$$(command -v devcontainer)" ]; then echo "Installing devcontainer CLI"; npm install -g @devcontainers/cli; else echo "devcontainer CLI is already installed"; fi

test: install-devcontainer-cli ## run tests
devcontainer features test --base-image mcr.microsoft.com/devcontainers/base:ubuntu
1 change: 1 addition & 0 deletions ext/devcontainer/src/azd/README.md
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Expand Up @@ -27,6 +27,7 @@ Select a specific `azd` version [here](https://github.com/Azure/azure-dev/releas
| Options Id | Description | Type | Default Value |
|-----|-----|-----|-----|
| version | Select or enter an Azure Developer CLI version. (Available versions may vary by Linux distribution.) | string | stable |
| extensions | Comma-separated list of Azure Developer CLI extensions to install. | string | (empty) |

## Customizations

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49 changes: 27 additions & 22 deletions ext/devcontainer/src/azd/devcontainer-feature.json
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@bwateratmsft bwateratmsft Jan 12, 2026

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Nit: This file is mostly whitespace changes. I'd suggest reverting the whitespace changes, otherwise you are on the git blame for every line.

Original file line number Diff line number Diff line change
@@ -1,25 +1,30 @@
{
"id": "azd",
"version": "0.1.0",
"name": "Azure Developer CLI",
"documentationURL": "https://github.com/azure/azure-dev/tree/main/ext/devcontainer/src/azd",
"description": "Installs the Azure Developer CLI along with needed dependencies.",
"options": {
"version": {
"type": "string",
"proposals": [
"stable"
],
"default": "stable",
"description": "Select or enter an Azure Developer CLI version. (Available versions may vary by Linux distribution.)"
}
"id": "azd",
"version": "0.2.0",
"name": "Azure Developer CLI",
"documentationURL": "https://github.com/azure/azure-dev/tree/main/ext/devcontainer/src/azd",
"description": "Installs the Azure Developer CLI along with needed dependencies.",
"options": {
"version": {
"type": "string",
"proposals": [
"stable"
],
"default": "stable",
"description": "Select or enter an Azure Developer CLI version. (Available versions may vary by Linux distribution.)"
},
"customizations": {
"vscode": {
"extensions": [
"ms-azuretools.vscode-bicep",
"ms-vscode.vscode-node-azure-pack"
]
}
"extensions": {
"type": "string",
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@bwateratmsft bwateratmsft Jan 12, 2026

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Can a string array be used here instead of a comma-separated string?

"default": "",
"description": "Optional comma separated list of Azure Developer CLI extensions to install."
}
}
},
"customizations": {
"vscode": {
"extensions": [
"ms-azuretools.vscode-bicep",
"ms-vscode.vscode-node-azure-pack"
]
}
}
}
13 changes: 13 additions & 0 deletions ext/devcontainer/src/azd/install.sh
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Expand Up @@ -5,6 +5,7 @@
#-------------------------------------------------------------------------------------------------------------

AZD_VERSION=${VERSION:-"stable"}
AZD_EXTENSIONS=${EXTENSIONS}

check_packages() {
if ! dpkg -s "$@" > /dev/null 2>&1; then
Expand All @@ -24,3 +25,15 @@ check_packages $(apt-cache search '^libicu[0-9]+$' | cut -d' ' -f1)
echo "(*) Installing Azure Developer CLI"

curl -fsSL https://aka.ms/install-azd.sh | bash -s -- --version $AZD_VERSION -a $(dpkg --print-architecture)


# If Azure Developer CLI extensions are requested, loop through and install
if [ -n "${AZD_EXTENSIONS}" ]; then
echo "Installing Azure Developer CLI extensions: ${AZD_EXTENSIONS}"
extensions=(`echo "${AZD_EXTENSIONS}" | tr ',' ' '`)
for i in "${extensions[@]}"
do
echo "Installing ${i}"
su "${_REMOTE_USER}" -c "azd extension install ${i}" || continue
done
fi
10 changes: 10 additions & 0 deletions ext/devcontainer/test/azd/scenarios.json
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@@ -0,0 +1,10 @@
{
"with_extensions": {
"image": "mcr.microsoft.com/devcontainers/base:ubuntu",
"features": {
"azd": {
"extensions": "azure.coding-agent"
}
}
}
}
17 changes: 17 additions & 0 deletions ext/devcontainer/test/azd/with_extensions.sh
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@@ -0,0 +1,17 @@
#!/bin/bash

set -e

# Optional: Import test library
source dev-container-features-test-lib

# Definition specific tests
check "version" azd version

azd extension list --installed

matching_extension_count=$(azd extension list --installed | grep "^azure.coding-agent" | wc -l)
check "check extensions" bash -c "test \"$matching_extension_count\" -eq 1"

# Report result
reportResults
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