organic-stack-upgrade

lib for upgrading organic stem skeletons

StackUpgrade class

constructor({destDir, name, version})

Constructs class instance with destDir, name and version properties

let stack = new StackUpgrade({
  destDir: process.cwd(),
  name: 'myStack',
  version: '1.0.0'
})

constructor({destDir, packagejson})

Constructs class instance with destDir property. Fills name and version properties by reading packagejson as .json file

let stack = new StackUpgrade({
  destDir: process.cwd(),
  packagejson: __dirname + '/package.json'
})

async configure({sourceDir, answers}): result_answers

Configures stack upgrade. This method does the following:

1. globs in sourceDir for any placeholders such as {{{variable-name}}} within file contents or file/directory paths
2. uses answers hash to provide values for found placeholders
3. prompts the user via inquirer to provide any missing answers to placeholders found from step 1
4. returns all placeholders with their respective answer values as result_answers hash

let stack = new StackUpgrade(...)
let answers = await stack.configure({
  sourceDir: path.join(__dirname, 'seedTemplateFolder')
})

// `answers` will be a hash with provided answers to 
// any placeholders been found within `seedTemplateFolder`

async merge({sourceDir, answers})

Merges stack upgrade into destDir. This method does the following:

1. globs in sourceDir for all files and folders and replaces any placeholders such as {{{variable-name}}} in all file/directory path or file contents
2. writes resulted files and directories do the destDir by using the following merge strategies:

• for .json files it does deep object merge and overrides existing keys
• for .gitignore files it reconstructs the file by appending to the using existing file the content provided from sourceDir. It eliminates duplicated lines
• for gitignore files it outputs .gitignore following the same rules as previous point
• for all other files it just overrides

let stack = new StackUpgrade({
  destDir: ...,
  ...
})
await stack.merge({
  sourceDir: path.join(__dirname, 'seedTemplateFolder'),
  answers: {...}
})

// will merge `seedTemplateFolder` into `destDir`
// replacing any placeholders been found with provided `answers` hash

async updateJSON()

Updates <destDir>/package.json by adding stack upgrade name and version within stackUpgrades key. This is useful way to record that given stack upgrade by name/version has been applied to the destDir

let stack = new StackUpgrade({
  destDir: process.cwd(),
  name: "my-upgrade",
  version: "1.0.1"
})
stack.updateJSON()

// will create or append the following to destDir/package.json
/*
{
  "stackUpgrades": {
    "my-upgrade": "1.0.1"
  }
}
*/

async checkUpgrade(name, version): Boolean

Checks <destDir>/package.json for specific stackUpgrades key matching name having respective version compared via compare-versions

Returns true when respective version is equal or greater than destination's

let stack = new StackUpgrade({
  destDir: process.cwd()
})

stack.checkUpgrade('my-upgrade', '^1.0.0') 

// returns 'true' when destDir has package.json like
/*
{
  "stackUpgrades": {
    "my-upgrade": "1.0.0"
  }
}
*/

async exec(cmd)

Helper method to execute cmd on destDir and to pipe the output to console. Note that destDir is created if not exists.

let stack = new StackUpgrade({
  destDir: process.cwd()
})

stack.exec('echo TEST')
// will execute `echo TEST` command witin `destDir` 
// inheriting any process env variables

async ensureDestDir()

Helper method to create destination directory if not found

async ask(question, defaultValue)

Helper method to use inquirer prompt and return the resulted answer