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243# bashful
**This is beta quality!** Use at your own risk.
Use a yaml file to stitch together commands and bash snippets and run them with a bit of style.
Why? Because your bash script should be quiet and shy-like (...and not such a loud mouth).
*"But why would you make this monstrosity?"* you ask... because ` &>/dev/null` and ` | tee -a some.log` and `set -e; do something; set +e` and other similar things is getting annoying. And besides... why shouldn't your bash script output look pretty?
**Features:**
- [x] Run bash snippits ('tasks') in series or parallel
- [x] A nice vertical progress bar to show current task status (with inline realtime stdout/stderr)
- [x] Download url references to bash scripts and executables
- [x] Bundle set of scripts and listed resources into a single simi-portable executable
- [x] Log all task stdout/stderr to a log file
- [x] ETA for running tasks (that have already been run before)
- [x] Configuration yaml block to control the behavior/look & feel
- [x] Detailed error reports when commands fail
- [x] Control which failing command should halt execution
## Installation
**Go tools**
```bash
go get github.com/wagoodman/bashful
```
**Mac**
```bash
brew tap wagoodman/bashful
brew install bashful
```
or download a Darwin build from the releases page.
**Ubuntu/Debian**
```bash
wget https://github.com/wagoodman/bashful/releases/download/v0.0.10/bashful_0.0.10_linux_amd64.deb
sudo apt install ./bashful_0.0.10_linux_amd64.deb
```
**RHEL/Centos**
```bash
wget https://github.com/wagoodman/bashful/releases/download/v0.0.10/bashful_0.0.10_linux_amd64.rpm
rpm -i bashful_0.0.10_linux_amd64.rpm
```
## Getting Started
**There are a ton of examples in the [`example/`](https://github.com/wagoodman/bashful/tree/master/example) dir**, but here are a few:
1. The simplest of examples:
```yaml
tasks:
- cmd: echo "Hello, World!"
```
To run it:
```bash
bashful run hello.yaml
```
2. A more realistic example: a build and deployment description
```yaml
# ci.yaml
tasks:
- name: Building app
cmd: go build -ldflags '-linkmode external -extldflags -static -s'
tags: build
- name: Packaging app
cmd: docker build -t my-awesome-app:v1 .
tags: build
- name: Publishing image
cmd: docker push my-awesome-app:v1
tags: deploy
- name: Deploying app
cmd: kubectl run my-awesome-app --image=docker.io/wagoodman/my-awesome-app:v1 --pt=80
tags: deploy
```
Run all of the tasks...
```bash
bashful run ci.yaml
```
...Or run just the build steps:
```bash
bashful run ci.yaml --tags build
```
3. Have an installer run things in parallel...
```yaml
# install.yaml
tasks:
- name: Installing bridgy
parallel-tasks:
- cmd: sudo apt-get install -y tmux sshfs
- cmd: pip install --user bridgy
```
...Or make an installer that downloads and runs everything it needs:
```yaml
# install.yaml
tasks:
# The given url gets executed by default
- name: Installing Cuda and Bazel
url: https://raw.githubusercontent.com/jasimpson/tensorflow-on-aws/master/toa_part_1of2.sh
# Or you can control how the url asset (<exec>) gets used
- name: Installing Tensorflow
url: https://raw.githubusercontent.com/jasimpson/tensorflow-on-aws/master/toa_part_2of2.sh
cmd: source ~/.bashrc && <exec>
```
Package up the installed into a single executable and give it to someone else to run (must be the same architecture and OS type):
```bash
bashful bundle install.yaml
# now you have a new executable called "runner", which can simply be executed
./runner
```
*Note: the bundle feature is pretty experimental right now.*
**There are a ton of examples in the [`example/`](https://github.com/wagoodman/bashful/tree/master/example) dir.** Go check them out!
## Configuration Options
Here is an exhaustive list of all of the config options (in the `config` yaml block). These options
are global options that apply to all tasks within the yaml file:
```yaml
# this block is used to configure the look, feel, and behavior of all tasks
config:
# which character used to delimintate the task list
bullet-char: "-"
# hide all subtasks after section completion
collapse-on-completion: false
# by default the screen is updated when an event occurs (when stdout from
# a running process is read). This can be changed to only allow the
# screen to be updated on an interval (to accomodate slower devices).
event-driven: false
# This is the character/string that is replaced in the cmd section of a task to reference a downloaded url
exec-replace-pattern: '<exec>'
# the number of tasks that can run simultaneously
max-parallel-commands: 4
# log all task output and events to the given logfile
log-path: path/to/file.log
# show/hide the detailed summary of all task failures after completion
show-failure-report: true
# show/hide the last summary line (showing % complete, number of tasks ran, eta, etc)
show-summary-footer: true
# show/hide the number of tasks that have failed in the summary footer line
show-summary-errors: false
# show/hide the number of tasks completed thus far on the summary footer line
show-summary-steps: true
# show/hide the eta and runtime figures on the summary footer line
show-summary-times: false
# globally enable/disable showing the stdout/stderr of each task
show-task-output: true
# Show an eta for each task on the screen (being shown on every line with a command running)
show-task-times: true
# globally enable/disable haulting further execution when any one task fails
stop-on-failure: true
# This is the character/string that is replaced with items listed in the 'for-each' block
replica-replace-pattern: '<replace>'
# time in milliseconds to update each task on the screen (polling interval)
update-interval: 250
```
The `tasks` block is an ordered list of processes to run. Each task has several options that can be configured:
```yaml
tasks:
- name: my awesome command # a title for the task
cmd: echo "woot" # the command to be ran (required)
collapse-on-completion: false # hide all defined 'parallel-tasks' after completion
event-driven: true # use a event driven or polling mechanism for displaying task stdout
ignore-failure: false # do not register any non-zero return code as a failure (this task will appear to never fail)
show-output: true # show task stdout to the screen
stop-on-failure: true # indicate if the application should continue if this cmd fails
parallel-tasks: ... # a list of tasks that should be performed concurrently
for-each: ... # a list of parameters used to duplicate this task
url: http://github.com/somescript.sh # download this url and execute it
md5: ae8abe98aeb389ae8b39e3434bbc # an expected md5 checksum of the url provided
tags: something # one or more 'tags' that can be used to execute a sub-selection of tasks within a run yaml
tags: # e.g. 'bashful run some.yaml --tags something'
- something # 'bashful run some.yaml --tags something,else'
- else # 'bashful run some.yaml --only-tags something'
```
**There are a ton of examples in the [`example/`](https://github.com/wagoodman/bashful/tree/master/example) dir.** Go check them out!
## Runtime Options
```
USAGE:
bashful run [options] <path-to-yaml-file>
bashful bundle <path-to-yaml-file>
COMMANDS:
bundle Bundle yaml and referenced url resources into a single executable
run Execute the given yaml
BUNDLE OPTIONS:
None
RUN OPTIONS:
--tags value A comma delimited list of matching task tags.
If a task's tag matches *or if it is not tagged* then it will be executed (also see --only-tags).
--only-tags value A comma delimited list of matching task tags. A task will only be executed if it has a matching tag.
GLOBAL OPTIONS:
--help, -h show help
--version, -v print the version
```
## Wish list
All feature requests are welcome!
- [ ] at least 70% test coverage
- [ ] Multiple (serial) commands for a single task (`cmd: [run something, run another thing]`)
- [ ] Multiple url references for a single task (`url: [https://someurl.com/some-script.sh, https://anotherurl.com/another-script.sh]`)
- [ ] Allow parallel tasks within parallel tasks (really just allow deeper nesting of any kind of task)
- [ ] Interact with the mouse to see more/less tasks (https://godoc.org/github.com/nsf/termbox-go#Event)