我有一个HTML文件的文件夹,其中包含顶部带有元数据的注释。如果元数据与一个正则表达式匹配,我想运行一个gulp-replace
操作;如果不匹配,我想运行另一个gulp-replace
操作,然后继续执行其余的任务管道。如果尝试使用gulp-if
进行各种迭代,但它总是导致“TypeError:undefined不是函数”错误
import gulp from 'gulp';
import plugins from 'gulp-load-plugins';
const $ = plugins();
function preprocess() {
var template_data = new RegExp('<!-- template_language:(\\w+)? -->\n', 'i');
var handlebars = new RegExp('<!-- template_language:handlebars -->', 'i');
var primaryColor = new RegExp('#dc002d', 'gi');
var mailchimpColorTag = '*|PRIMARY_COLOR|*';
var handlebarsColorTag = '{{PRIMARY_COLOR}}';
var replaceCondition = function (file) {
return file.contents.toString().match(handlebars);
}
return gulp.src('dist/**/*.html')
.pipe($.if(
replaceCondition,
$.replace(primaryColor, handlebarsColorTag),
$.replace(primaryColor, mailchimpColorTag)
))
.pipe($.replace, template_data, '')
.pipe(gulp.dest('dist'));
}
最有效的方法是什么?
答案 0 :(得分:0)
gulp-filter
就是答案。虽然gulp-if
可用于决定是否应将特定操作应用于整个流,但可以使用gulp-filter
来确定应该应用操作的流中的哪些文件。
import gulp from 'gulp';
import plugins from 'gulp-load-plugins';
const $ = plugins();
function preprocess() {
var template_language = new RegExp('<!-- template_language:(\\w+)? -->\n', 'i');
var handlebars = 'handlebars';
var primaryColor = new RegExp('#dc002d', 'gi');
var handlebarsColorTag = '{{PRIMARY_COLOR}}';
var handlebarsCondition = function (file) {
var match = file.contents.toString().match(template_language);
return (match && match[1] == handlebars);
}
var handlebarsFilter = $.filter(handlebarsCondition, {restore: true});
var mailchimpColorTag = '*|PRIMARY_COLOR|*';
var mailchimpCondition = function (file) {
return !handlebarsCondition(file);
}
var mailchimpFilter = $.filter(mailchimpCondition, {restore: true});
return gulp.src('dist/**/*.html')
.pipe(handlebarsFilter)
.pipe($.replace(primaryColor, handlebarsColorTag))
.pipe($.debug({title: 'Applying ' + handlebarsColorTag}))
.pipe(handlebarsFilter.restore)
.pipe(mailchimpFilter)
.pipe($.replace(primaryColor, mailchimpColorTag))
.pipe($.debug({title: 'Applying ' + mailchimpColorTag}))
.pipe(mailchimpFilter.restore)
.pipe($.replace(template_language, ''))
.pipe(gulp.dest('dist'));
}