Eve: Environment editor

The eve utility reads the specified files, or standard input if no files are specified, replacing all instances of {{VAR}} with the environment variable of the same name e.g. $VAR. This utility is mainly useful as a replacement to using sed to insert environment variables into files. As is common when using Docker.

Installation

Binary

Automatic

cargo install eve

Manual

You can download prebuilt binaries in the [releases section] or create one from source.

shell $ git clone https://github.com/Aaronepower/eve.git $ cd eve $ cargo build --release

Linux/OSX

```

sudo mv target/release/eve /usr/local/bin

```

Windows

• Create a folder for eve
• search for env
• open "edit your enviroment variables"
• edit PATH
• append folder path to the end of the string ie: <path>;C:/eve/;

Library

eve = "0.1"

Example

Here's an example of replacing variables in a nginx configuration with environment variables, and comparsion with the equivalent sed command.

nginx.conf

```nginx server { listen 80; listen [::]:80;

server_name {{NGINX_HOST}};

location / {
    proxy_pass {{NGINX_PROXY}};
    proxy_next_upstream error timeout invalid_header http_500 http_502
        http_503 http_504;
    proxy_redirect off;
    proxy_buffering off;
    proxy_set_header        Host            {{NGINX_HOST}};
    proxy_set_header        X-Real-IP       $remote_addr;
    proxy_set_header        X-Forwarded-For $proxy_add_x_forwarded_for;
}

} ```

.env

NGINX_HOST=localhost NGINX_PROXY=localhost:8000

Commands

sed

bash sed -e "s|{{NGINX_HOST}}|$NGINX_HOST|" \ -e "s|{{NGINX_PROXY}}|$NGINX_PROXY|" \ nginx.conf

eve

bash eve nginx.conf

Output

```bash server { listen 80; listen [::]:80;

server_name localhost;

location / {
    proxy_pass localhost:8000;
    proxy_next_upstream error timeout invalid_header http_500 http_502
        http_503 http_504;
    proxy_redirect off;
    proxy_buffering off;
    proxy_set_header        Host            localhost;
    proxy_set_header        X-Real-IP       $remote_addr;
    proxy_set_header        X-Forwarded-For $proxy_add_x_forwarded_for;
}

} ```