CLI to switch aws profiles

I do this for fun on my free time, so if you have any issues or suggestions, please add an issue to the repository, and if I have time I'll try to do it, but keep in mind I can be months without checking the repository again! So feel free to fork the repository if you want and do all the changes you want/need!

• What does canu mean?
• How to use canu?
  • Installation
    • Custom installation
      • Examples
  • Uninstall

The name is a tribute to a friend. It's probably not the best name for an aws profile switcher but... well, it means something to me 😊

The first thing you need to know is: don't use go install github.com/belitre/canu, that would add canu as an executable to your $GOPATH/bin with name canu, and we don't want that!

Also, canu will only read profiles from the aws profiles config file that match the pattern [profile profile-name] with sso_start_url, sso_account_id and sso_role_name defined. That means it will not show the default profile, or any other profile that is not using SSO. For example, if your config file looks like this:

[default]
region = us-east-1

[profile test]
region = us-east-2

[profile admin]
sso_start_url = https://d-93456h53g77.awsapps.com/start
sso_region = us-east-1
sso_account_id = 987654321
sso_role_name = MyRoleName
region = us-east-1

canu will only show the profile admin in the menu.

• Download the binary for your OS/ARCH from the release page and unpack it in a folder available in your $PATH (I'll use for the example $GOPATH/bin):

  curl -sL https://github.com/belitre/canu/releases/download/1.1.0/canu-darwin-arm64.tar.gz | tar -zxf - -C $GOPATH/bin
  

  I recommend to download the _canu binary in a folder where your user has permissions to write. Of course, as a user, you can download the binary to a folder that requires root permissions, but then you will need to run the install command with root permissions as well, and unless you are using sudo, which should keep the correct value for your user in the $HOME env var, you may need to set the path where you want canu to write the alias, to be sure it writes it to the user shell config file, not the root one. More information about this in the next section.
• Run _canu install. Running this command, canu will install with the default settings. That means it will use as default config path for your aws config: $HOME/.aws/config, and it will use $HOME/.bash_profile to add the alias. If you have different settings, please check the next section to learn how to customise your canu installation.
• Restart your shell, or run the alias returned in the _canu install output.
• Run canu and enjoy!

What happens during the installation is:

• canu will create a shell script in the same folder the binary is downloaded with the name of the alias (by default this name is canu, but you can set a different name, check the next section to learn how). This is the reason you will need to run _canu install with root permissions if you download the _canu binary to a folder where your user doesn't have write permissions!
• canu will add an alias to your $HOME/.bash_profile that will source the generated shell script, this is how canu sets the selected profile in the AWS_PROFILE environment variable.

Once you downloaded the binary, you can check the available flags running _canu install -h:

installs canu aliases

Usage:
  _canu install [flags]

Flags:
      --alias-name string     name of the alias (default "canu")
  -c, --config-path string    Path with the AWS config file with the defined profiles (default "/Users/miguel/.aws/config")
  -e, --exclude stringArray   Profiles containing any of the excludes will be ignored. Exclude takes preference over include (ignores upper/lower case)
  -h, --help                  help for install
  -i, --include stringArray   Profiles containing any of the includes will be available to select (ignores upper/lower case)
      --shell-config string   path to the shell config script (default "/Users/miguel/.bash_profile")
      --skip-alias            if provided it won't add an alias to the shell config script
  -s, --sort                  If provided it will sort the profiles, by default the profiles will use the same order you have in your aws config file

There are two different kind of flags here:

• Flags related with the installation:

  --alias-name string     name of the alias (default "canu")
  --shell-config string   path to the shell config script (default "/Users/miguel/.bash_profile")
  --skip-alias            if provided it won't add an alias to the shell config script
  

  • --alias-name: This is the name of the alias canu will create, also, it will be the name of the shell script generated to set the correct value for the AWS_PROFILE environment variable.
  • --shell-config: The path to your shell profile config file. By default canu will use $HOME/.bash_profile. If you use zsh you can run the install command with --shell-config $HOME/.zshrc
  • --skip-alias: If this flag is provided canu won't add the alias to your shell profile config file.
• The other flags will change the behaviour when running the generated alias:

  -c, --config-path string    Path with the AWS config file with the defined profiles (default "/Users/miguel/.aws/config")
  -e, --exclude stringArray   Profiles containing any of the excludes will be ignored. Exclude takes preference over include (ignores upper/lower case)
  -i, --include stringArray   Profiles containing any of the includes will be available to select (ignores upper/lower case)
  -s, --sort                  If provided it will sort the profiles, by default the profiles will use the same order you have in your aws config file
  

  • -c, --config-path: The path where the aws config for your profiles is located, by default it will use $HOME/.aws/config
  • -e, --exclude: Flag to exclude profiles, multiple values can be provided. canu will exclude the profiles containing any of the provided values with this flag. This flag takes preference over --include
  • -i, --include: Flag to include profiles, multiple values can be provided. canu will include only the profiles containing any of provided values with this flag.
  • -s, --sort: If this flag is provided canu will sort the profiles alphabetically before showing the menu. By default the order of the profiles will be the same one you have in your aws profiles config file.

• Install canu with alias profile-switcher, using as shell zsh:

  _canu install --shell-config /Users/my-user/.zshrc --alias-name profile-switcher
  

• Install canu with default values for installation, excluding profiles with the string test and dev, sorting the list and using a different path for the aws profiles config file while running:

  _canu install -e test -e dev -s -c /Users/my-user/.aws/custom-config
  

• Install canu with all custom settings:

  _canu install --alias-name profile-switcher --shell-config /Users/my-user/.zshrc -c /Users/my-user/.aws/custom-config -e test -e dev -i account1 -i account2 -s
  

  This will install canu with the alias profile-switcher using the zsh shell config file to create the alias, excluding profiles containing test and dev, and including profiles containing account1 and account2, and sorting the profiles before showing the menu.
• Install multiple aliases for different profiles:

  _canu install --alias-name canu-dev -i dev
  _canu install --alias-name canu-prod -i prod
  

  This will create two aliases, one called canu-dev that will include only profiles containing dev, and another one called canu-prod that will include only profiles containing prod.

The uninstall process will delete the script created by _canu install and remove the alias added if it's found in the file.

The available flags for uninstall are:

./bin/_canu uninstall -h
uninstalls canu aliases

Usage:
  _canu uninstall [flags]

Flags:
      --alias-name string     name of the alias (default "canu")
  -h, --help                  help for uninstall
      --shell-config string   path to the shell config script (default "/Users/miguel/.bash_profile")

If you used the default installation, you can just run:

_canu uninstall

In case you used a different alias or a different shell config file to add the alias you can run:

_canu uninstall --alias-name profile-switcher --shell-config /Users/my-user/.zshrc