A Bash script to move all images from one Azure Container Registry to another, with prompts for repository selection and confirmation, while retaining the order or date based on creation time.

move_images_between_acrs.sh

#!/bin/bash

# Function to prompt for user input with a default value
prompt_input() {
    local prompt_message="$1"
    local default_value="$2"
    local user_input
    read -p "$prompt_message [$default_value]: " user_input
    echo "${user_input:-$default_value}"
}

# Function to authenticate with Azure CLI
authenticate_azure_cli() {
    echo "Authenticating with Azure CLI..."
    if ! az login; then
        echo "Azure CLI authentication failed. Please make sure you have Azure CLI installed and logged in."
        exit 1
    fi
}

# Function to set the active context to the specified Azure Container Registry
set_active_context() {
    local registry_name="$1"
    echo "Setting active context to the registry: $registry_name"
    if ! az acr login --name "$registry_name"; then
        echo "Failed to set the active context to the specified Azure Container Registry."
        exit 1
    fi
}

# Function to retrieve the list of repositories in the specified Azure Container Registry
get_repository_list() {
    local registry_name="$1"
    az acr repository list --name "$registry_name" --output tsv
}

# Function to retrieve the list of image tags for a repository in the specified Azure Container Registry
get_image_tags() {
    local registry_name="$1"
    local repository_name="$2"
    az acr repository show-tags --name "$registry_name" --repository "$repository_name" --orderby time_asc --output tsv
}

# Function to copy an image from the source registry to the target registry
copy_image() {
    local source_registry_name="$1"
    local target_registry_name="$2"
    local repository_name="$3"
    local image_tag="$4"
    echo "Copying image: $repository_name:$image_tag"
    if ! az acr import --name "$target_registry_name" --source "$source_registry_name.azurecr.io/$repository_name:$image_tag" --image "$repository_name:$image_tag"; then
        echo "Failed to copy the image: $repository_name:$image_tag"
    fi
}

# Main script

# Prompt for source registry or use as argument
if [ -z "$1" ]; then
    source_registry_name=$(prompt_input "Enter the source registry name" "")
else
    source_registry_name=$1
fi

# Prompt for target registry or use as argument
if [ -z "$2" ]; then
    target_registry_name=$(prompt_input "Enter the target registry name" "")
else
    target_registry_name=$2
fi

# Authenticate with Azure CLI
authenticate_azure_cli

# Set context to the source registry
set_active_context "$source_registry_name"

# Get the list of repositories in the source registry
repositories=$(get_repository_list "$source_registry_name")

# Iterate through each repository
for repository in $repositories; do
    echo "Processing repository: $repository"

    # Get the list of image tags in ascending order based on creation time
    image_tags=$(get_image_tags "$source_registry_name" "$repository")

    # Prompt for confirmation to proceed with moving images
    read -p "Move images from repository '$repository'? [Y/n]: " confirm
    if [[ ! $confirm =~ ^[Yy]$ ]]; then
        echo "Skipping repository: $repository"
        continue
    fi

    # Display the list of images that will be moved
    echo "Images to be moved:"
    for tag in $image_tags; do
        echo "$repository:$tag"
    done

    # Prompt for final confirmation before moving images
    read -p "Confirm moving images from repository '$repository'? [Y/n]: " confirm
    if [[ ! $confirm =~ ^[Yy]$ ]]; then
        echo "Skipping repository: $repository"
        continue
    fi

    # Copy images to the target registry
    for tag in $image_tags; do
        copy_image "$source_registry_name" "$target_registry_name" "$repository" "$tag"
    done
done