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let fs = require('fs');
let Task = require('./task').Task;
function isFileOrDirectory(t) {
return (t instanceof FileTask ||
t instanceof DirectoryTask);
}
function isFile(t) {
return (t instanceof FileTask && !(t instanceof DirectoryTask));
}
/**
@name jake
@namespace jake
*/
/**
@name jake.FileTask
@class`
@extentds Task
@description A Jake FileTask
@param {String} name The name of the Task
@param {Array} [prereqs] Prerequisites to be run before this task
@param {Function} [action] The action to perform to create this file
@param {Object} [opts]
@param {Array} [opts.asyc=false] Perform this task asynchronously.
If you flag a task with this option, you must call the global
`complete` method inside the task's action, for execution to proceed
to the next task.
*/
class FileTask extends Task {
constructor(...args) {
super(...args);
this.dummy = false;
if (fs.existsSync(this.name)) {
this.updateModTime();
}
else {
this.modTime = null;
}
}
isNeeded() {
let prereqs = this.prereqs;
let prereqName;
let prereqTask;
// No repeatsies
if (this.taskStatus == Task.runStatuses.DONE) {
return false;
}
// The always-make override
else if (jake.program.opts['always-make']) {
return true;
}
// Default case
else {
// We need either an existing file, or an action to create one.
// First try grabbing the actual mod-time of the file
try {
this.updateModTime();
}
// Then fall back to looking for an action
catch(e) {
if (typeof this.action == 'function') {
return true;
}
else {
throw new Error('File-task ' + this.fullName + ' has no ' +
'existing file, and no action to create one.');
}
}
// Compare mod-time of all the prereqs with its mod-time
// If any prereqs are newer, need to run the action to update
if (prereqs && prereqs.length) {
for (let i = 0, ii = prereqs.length; i < ii; i++) {
prereqName = prereqs[i];
prereqTask = this.namespace.resolveTask(prereqName) ||
jake.createPlaceholderFileTask(prereqName, this.namespace);
// Run the action if:
// 1. The prereq is a normal task (not file/dir)
// 2. The prereq is a file-task with a mod-date more recent than
// the one for this file/dir
if (prereqTask) {
if (!isFileOrDirectory(prereqTask) ||
(isFile(prereqTask) && prereqTask.modTime > this.modTime)) {
return true;
}
}
}
}
// File/dir has no prereqs, and exists -- no need to run
else {
// Effectively done
this.taskStatus = Task.runStatuses.DONE;
return false;
}
}
}
updateModTime() {
let stats = fs.statSync(this.name);
this.modTime = stats.mtime;
}
complete() {
if (!this.dummy) {
this.updateModTime();
}
// Hackity hack
Task.prototype.complete.apply(this, arguments);
}
}
exports.FileTask = FileTask;
// DirectoryTask is a subclass of FileTask, depends on it
// being defined
let DirectoryTask = require('./directory_task').DirectoryTask;