A shell script to quickly inspect a particular file in a docker image, without having to run it.

dfe

#!/bin/sh

# Check if the correct number of arguments is provided
if [ "$#" -ne 2 ]; then
    echo "Usage: $0 <image> <source_path>"
    exit 1
fi

# Assign arguments to variables
image="$1"
source_path="$2"

# Create a temporary directory to store the extracted file
temp_dir=$(mktemp -d)
destination_path="$temp_dir/$(basename "$source_path")"

# Extract the file from the Docker image
container_id=$(docker create "$image")
docker cp "$container_id:$source_path" "$destination_path"
docker rm "$container_id"

# Check if the path exists
if [ -e "$destination_path" ]; then
    # Use VISUAL if set, else EDITOR, else default to vi
    if [ -n "$VISUAL" ]; then
        "$VISUAL" "$destination_path"
    elif [ -n "$EDITOR" ]; then
        "$EDITOR" "$destination_path"
    else
        vi "$destination_path"
    fi
else
    echo "Failed to extract the file from the image."
fi

# Clean up the temporary directory
rm -rf "$temp_dir"