STU

S3 Terminal UI

About

STU is the TUI explorer application for Amazon S3 (AWS S3) written in Rust using ratatui.

Installation

Cargo

$ cargo install --locked stu

Homebrew (macOS)

$ brew install lusingander/tap/stu

AUR (Arch Linux)

$ paru -S stu

Binary

You can download binaries from releases.

Usage

After installation, run the following command:

$ stu

Basically, you can use it in the same way as the AWS CLI.

In other words, if the default profile settings exist or the environment variables are set, you do not need to specify any options.

Options

STU - S3 Terminal UI

Usage: stu [OPTIONS]

Options:
  -r, --region <REGION>     AWS region
  -e, --endpoint-url <URL>  AWS endpoint url
  -p, --profile <NAME>      AWS profile name
  -b, --bucket <NAME>       Target bucket name
      --path-style <TYPE>   Path style type for object paths [default: auto] [possible values: auto, always, never]
      --debug               Enable debug logs
  -h, --help                Print help
  -V, --version             Print version

Here are some examples of how to run with options:

# Connect by specifying the profile
$ stu --profile foo-profile

# Show only the specified bucket objects
$ stu --bucket bar-bucket

# Connect to localstack, minio, etc.
$ stu --endpoint-url http://localhost:12345

# Connect by specifying environment variables
$ AWS_ACCESS_KEY_ID=abc AWS_SECRET_ACCESS_KEY=xyz stu

--path-style <TYPE>

Select the address model for S3 objects.

• never uses Virtual-Hosted Style, which is what AWS currently uses.
  • https://bucket.s3.region.amazonaws.com/key
• always uses Path Style, which is used when using localstack, minio, etc.
  • https://s3.region.amazonaws.com/bucket/key
• auto automatically determines which model to use, which is the default setting.

For other S3-compatible services, which one to use depends on the service.

Keybindings

The basic key bindings are as follows:

Key	Description
Ctrl-C	Quit app
Esc	Quit app / Close dialog
Enter	Confirm / Open selected item
Backspace	Go back to previous / Close dialog
j/k	Select item / Scroll
?	Show help

Detailed operations on each view can be displayed by pressing ? key.

Config

Config is loaded from $STU_ROOT_DIR/config.toml.

• If STU_ROOT_DIR environment variable is not set, ~/.stu is used by default.
  • If the STU_ROOT_DIR directory does not exist, it will be created automatically.
• If the config file does not exist, the default values will be used for all items.
• If the config file exists but some items are not set, the default values will be used for those unset items.

Config file format

The values set in this example are the default values.

# The directory to save the downloaded objects.
# type: string
download_dir = "$STU_ROOT_DIR/download"
# The default region to use if the region cannot be obtained from the command line options or AWS settings.
# type: string
default_region = "us-east-1"

[ui.object_list]
# The date format of a last modified in the object list.
# The format must be specified in strftime format.
# https://docs.rs/chrono/latest/chrono/format/strftime/index.html
# type: string
date_format = "%Y-%m-%d %H:%M:%S"
# The width of a last modified in the object list.
# It is recommended to set this when setting date_format.
# type: u16
date_width = 19

[ui.object_detail]
# The date format of a last modified in the object detail.
# The format must be specified in strftime format.
# https://docs.rs/chrono/latest/chrono/format/strftime/index.html
# type: string
date_format = "%Y-%m-%d %H:%M:%S"

[preview]
# Whether syntax highlighting is enabled in the object preview.
# type: bool
highlight = false
# The name of the color theme to use for syntax highlighting in the object preview.
# type: string
highlight_theme = "base16-ocean.dark"
# Whether image file preview is enabled in the object preview.
# type: bool
image = false

Syntax highlighting

In the object preview, Syntax highlighting using syntect is available. To enable this, set preview.highlight = true in the config file.

Color themes

You can change the color theme by specifying the theme name in preview.highlight_theme.

By default the following themes are available:

• base16-ocean.dark
• base16-eighties.dark
• base16-mocha.dark
• base16-ocean.light
  • https://github.com/SublimeText/Spacegray
• InspiredGitHub
  • https://github.com/sethlopez/InspiredGitHub.tmtheme
• Solarized (dark)
• Solarized (light)
  • https://github.com/altercation/solarized

Also, by creating xxx.tmTheme in $STU_ROOT_DIR/preview_theme/, you can use xxx and load it.

Syntax definitions

You can add syntax definitions for file types that are not supported by default. You can use it by creating a .sublime-syntax file in $STU_ROOT_DIR/preview_syntax/.

https://www.sublimetext.com/docs/syntax.html

Features / Screenshots

Bucket list

• Show list of buckets
  • filter/sort items
• Copy resource name to clipboard

Object list

• Show list of objects in a hierarchy
  • filter/sort items
• Copy resource name to clipboard

Object detail

• Show object details
• Show object versions
• Download object
  • Download the specified version
• Preview object
  • Preview the specified version
• Copy resource name to clipboard

Object preview

• syntax highlighting (by syntect)
  • It must be enabled in the config
• image preview (by ratatui-image)
  • It must be enabled in the config

Troubleshooting

• If you cannot connect to AWS S3, first check whether you can connect using the AWS CLI with the same settings.
• By running with the --debug flag, logs will be output to $STU_ROOT_DIR/debug.log.
  • Currently, application events and AWS SDK logs are output.
  • Pressing F12 while the application is running will dump the application state to the log.
• When reporting a problem, please include the information like the following.
  • Application version
  • Operating system and version
  • Terminal you are using
  • Steps to reproduce the issue
  • Relevant log files or error messages

Contributing

To get started with contributing, please review CONTRIBUTING.md.

Contributions that do not follow these guidelines may not be accepted.

License

MIT