I want to use less preprocessor in my dart angular 2 app. What I exactly do :
include dependency into pabspec.yaml file
- less_dart:
entry_point: web/main.less
build_mode: dart
include <link rel="stylesheet" href="main.css"/> into index.html file
In web folder I added main.less file as well
In this point my app works correct, but when I try to include other .less files in other components in leads to exaption, for instance:
I created file app.less, inside I writed some less code
In file app_component.dart I included it like: styleUrls: const ['app.less'],
As result I had such exaption as:
GET http://localhost:8080/packages/SmartPeopleUI/app.less.dart
An error occurred loading file: package:Project/app.less.dart
I have .scss files in two different directories:
./blog/styles/
./common/styles/
There is a file in ./blog/styles called blog.scss and I'm importing .scss files from ./blog/styles/ (i.e. same directory) and ./common/styles/.
How should I create gulp task to watch both these directories and create final .css files somewhere else (say in ./dist)?
This is my current task:
gulp.task('sass', function () {
gulp.src(['./blog/styles/*.scss', './common/styles/*.scss'])
.pipe(sass())
.pipe(gulp.dest('./dist/style.css'));
});
I'm importing files in blog.scss only using the name like this:
#import "forms"; //from the same directory
#import "_mixins"; //from ./common/styles
#import "_common"; //from ./common/styles
Right now I'm getting the following error:
file to import not found or unreadable: _mixins
As it seems it can't see .scss files inside ./common/styles directory...
You need to provide the relative path to the sass files that you're importing. So change the import code to be something like this:
#import "forms";
#import "../../common/styles/_mixins";
#import "../../common/styles/_common";
Then, since you are importing the files from ./common/styles you should only need gulp to target the scss file in ./blog/styles. So your gulp function could look something like this:
gulp.task('sass', function() {
gulp.src('./blog/styles/blog.scss')
.pipe(sass())
.pipe(gulp.dest('./dist/style.css'));
});
You could also use sass load paths for this.
Rather than have relative paths in your blog.scss, you set your gulp task to have a load path pointing to your common/styles directory and just call the partial imports as you had done originally.
The compiler task will look inside the current src directory for the imports and then look in the load paths.
Assume I have two files
AFile.ts
/// <reference path="ZFile.ts" />
new Z().Foo();
ZFile.ts
class Z
{
Foo() { }
}
Is there a way to generate all scripts in a single js file in the order it requires (need ZFile before AFile to get the definition of Z)?
In post build events I added a call to TypeScript compiler
tsc "..\Content\Scripts\Start.ts" --out "..\Content\Scripts\all.js"
In the bundle configuration I added
bundles.Add(new ScriptBundle("~/scripts/all").Include("~/Content/Scripts/all.js"));
On the _Layout.cshtml file I added
#Scripts.Render("~/Scripts/all")
And with that I got
<script src="/Scripts/all?v=vsTcwLvB3b7F7Kv9GO8..."></script>
Which is all my script in a single file.
The compiler does not minify, you have to use bundles and compile on Release or set
BundleTable.EnableOptimizations = true;
You can also minify using Web Essentials or grabbing the contents and minifing somewhere else.
Now VS Typescript Extension supports merging to one file.
Make sure that you have installed the extension Tools -> Extensions and Updates (VS2015 has it by default)
Go to the project properties and check Combine JavaScript output into file:
Important to have /// <reference /> (as in question), it helps tsc order files by dependencies before the merge.
Then for minimisation bundle can be used as usual:
bundles.Add(new ScriptBundle("~/bundles/finale").Include("~/js/all.js"));
and in view
#Scripts.Render("~/bundles/finale")
Use the --out parameter.
tsc AFile.ts ZFile.ts --out single.js
The typescript compiler will do the dependency navigation for you automatically.
Assuming all of your ts files are directly or indirectly under a folder called say 'ts' you could write a tt script which merged all of .js files(but not min.js) into a file myApp.js and all of your min.js files into myApp.min.js.
To obtain the ordering of files you could process subfolders thus:
string[] FolderOrder =
{
#"libs\utils\",
#"libs\controls\",
#"app\models",
#"app\viewmodels",
#".",
};
I'm using the "less-rails" gem to get less integrated into my rails app.
In my "applications.css.less" file, I'm importing other LESS files into it. When I make a change to any of the imported files I need to re-save the "application.css.less" file in order for it to pick up the change.
How can I have the "applications.css.less" file recompile automatically when one of the imported files are changed?
found a solution mentioned here: https://github.com/metaskills/less-rails/issues/80
gem 'less-rails', github: 'dv/less-rails', branch: 'fix-import-dependencies'
wont work with livereload tho so im back to cmd + r
This is an old problem and unfortunately there is no way to do this with native way. The LESS compiler just watches modified files. So, if you are using a file with imports, this file needs modified and recompiled.
In development enviroment (with javascript) you can solve this issue putting this to clear cache:
<link rel="stylesheet/less" type="text/css" href="/css/style.less"/>
<script src="/js/less-1.1.5.min.js" type="text/javascript"></script>
<script>
less = {env:'development'};
function destroyLessCache(pathToCss) { // e.g. '/css/' or '/stylesheets/'
if (!window.localStorage || !less || less.env !== 'development') {
return;
}
var host = window.location.host;
var protocol = window.location.protocol;
var keyPrefix = protocol + '//' + host + pathToCss;
for (var key in window.localStorage) {
if (key.indexOf(keyPrefix) === 0) {
delete window.localStorage[key];
}
}
}
window.onload=destroyLessCache('/css/');
</script>
Reference: https://github.com/cloudhead/less.js/issues/47
My other less files were not going through the asset pipline. Once I fixed this and imported them into my "application.css.less" file, "application.css.less" began recompiling automatically when the other files changed.
So I was reading this stackoverflow post about "autoversioning" in ASP.NET MVC for CSS/JS files and was wondering what the "best" strategy is to do this.
The solution provided inserts an assembly number - which means everytime you publish - it will change EVERY SINGLE file which is not ideal because if you make modifications to just 1 *.css or *.js then it will change each and every file.
1) How can it be done just for "single files" instead of using site wide assembly using modification date or something on IIS7 ?
2) Also if I have some sort of "static" asset like - http://static.domain.com/js/123.js - how can I use rewrite to send the latest file for a request if someone has integrated this static link onto their site ?
i.e. http://static.domain.com/js/123.js is the link and when a request comes for this - check and send latest file ?
ASP.NET 4.5+ comes with a built-in bundling & minification framework
which is designed to solve this problem.
If you absolutely need a simple roll-your-own solution you can use the answer below, but I would always say the correct way is to use a bundling & minification framework.
You can modify the AssemblyInfo.cs file like so:
Change
[assembly: AssemblyVersion("1.0.0.0")]
to
[assembly: AssemblyVersion("1.0.*")]
This means that every time the project is built, it will have a new assembly version which is higher than the previous one. Now you have your unique version number.
Create an UrlHelperExtension class that will help get this information when needed in the views:
public static class UrlHelperExtensions
{
public static string ContentVersioned(this UrlHelper self, string contentPath)
{
string versionedContentPath = contentPath + "?v=" + Assembly.GetAssembly(typeof(UrlHelperExtensions)).GetName().Version.ToString();
return self.Content(versionedContentPath);
}
}
You can now easily add a version number to your views in the following manner:
<link href="#Url.ContentVersioned("style.css")" rel="stylesheet" type="text/css" />
When viewing your page source you will now have something that looks like
<link href="style.css?v=1.0.4809.30029" rel="stylesheet" type="text/css" />
UPDATE: The previous version did not work on Azure, I have simplified and corrected below. (Note, for this to work in development mode with IIS Express, you will need to install URL Rewrite 2.0 from Microsoft http://www.iis.net/downloads/microsoft/url-rewrite - it uses the WebPi installer, make sure to close Visual Studio first)
If you would like to change the actual names of the files, rather than appending a querystring (which is ignored by some proxies / browsers for static files) You can follow the following steps: (I know this is an old post, but I ran across it while developing a solution:
How to do it: Auto-increment the assembly version every time the project is built, and use that number for a routed static file on the specific resources you would like to keep refreshed. (so something.js is included as something.v1234.js with 1234 automatically changing every time the project is built) - I also added some additional functionality to ensure that .min.js files are used in production and regular.js files are used when debugging (I am using WebGrease to automate the minify process) One nice thing about this solution is that it works in local / dev mode as well as production. (I am using Visual Studio 2015 / Net 4.6, but I believe this will work in earlier versions as well.
Step 1: Enable auto-increment on the assembly when built
In the AssemblyInfo.cs file (found under the "properties" section of your project change the following lines:
[assembly: AssemblyVersion("1.0.0.0")]
[assembly: AssemblyFileVersion("1.0.0.0")]
to
[assembly: AssemblyVersion("1.0.*")]
//[assembly: AssemblyFileVersion("1.0.0.0")]
Step 2: Set up url rewrite in web.config for files with embedded version slugs (see step 3)
In web.config (the main one for the project) add the following rules in the <system.webServer> section I put it directly after the </httpProtocol> end tag.
<rewrite>
<rules>
<rule name="static-autoversion">
<match url="^(.*)([.]v[0-9]+)([.](js|css))$" />
<action type="Rewrite" url="{R:1}{R:3}" />
</rule>
<rule name="static-autoversion-min">
<match url="^(.*)([.]v[0-9]+)([.]min[.](js|css))$" />
<action type="Rewrite" url="{R:1}{R:3}" />
</rule>
</rules>
</rewrite>
Step 3: Setup Application Variables to read your current assembly version and create version slugs in your js and css files.
in Global.asax.cs (found in the root of the project) add the following code to protected void Application_Start() (after the Register lines)
// setup application variables to write versions in razor (including .min extension when not debugging)
string addMin = ".min";
if (System.Diagnostics.Debugger.IsAttached) { addMin = ""; } // don't use minified files when executing locally
Application["JSVer"] = "v" + System.Reflection.Assembly.GetExecutingAssembly().GetName().Version.ToString().Replace('.','0') + addMin + ".js";
Application["CSSVer"] = "v" + System.Reflection.Assembly.GetExecutingAssembly().GetName().Version.ToString().Replace('.', '0') + addMin + ".css";
Step 4: Change src links in Razor views using the application variables we set up in Global.asax.cs
#HttpContext.Current.Application["CSSVer"]
#HttpContext.Current.Application["JSVer"]
For example, in my _Layout.cshtml, in my head section, I have the following block of code for stylesheets:
<!-- Load all stylesheets -->
<link rel='stylesheet' href='https://fontastic.s3.amazonaws.com/8NNKTYdfdJLQS3D4kHqhLT/icons.css' />
<link rel='stylesheet' href='/Content/css/main-small.#HttpContext.Current.Application["CSSVer"]' />
<link rel='stylesheet' media='(min-width: 700px)' href='/Content/css/medium.#HttpContext.Current.Application["CSSVer"]' />
<link rel='stylesheet' media='(min-width: 700px)' href='/Content/css/large.#HttpContext.Current.Application["CSSVer"]' />
#RenderSection("PageCSS", required: false)
A couple things to notice here: 1) there is no extension on the file. 2) there is no .min either. Both of these are handled by the code in Global.asax.cs
Likewise, (also in _Layout.cs) in my javascript section: I have the following code:
<script src="~/Scripts/all3bnd100.min.js" type="text/javascript"></script>
<script src="~/Scripts/ui.#HttpContext.Current.Application["JSVer"]" type="text/javascript"></script>
#RenderSection("scripts", required: false)
The first file is a bundle of all my 3rd party libraries I've created manually with WebGrease. If I add or change any of the files in the bundle (which is rare) then I manually rename the file to all3bnd101.min.js, all3bnd102.min.js, etc... This file does not match the rewrite handler, so will remain cached on the client browser until you manually re-bundle / change the name.
The second file is ui.js (which will be written as ui.v12345123.js or ui.v12345123.min.js depending on if you are running in debug mode or not) This will be handled / rewritten. (you can set a breakpoint in Application_OnBeginRequest of Global.asax.cs to watch it work)
Full discussion on this at: Simplified Auto-Versioning of Javascript / CSS in ASP.NET MVC 5 to stop caching issues (works in Azure and Locally) With or Without URL Rewrite (including a way to do it WITHOUT URL Rewrite)
1)
Use file modification time instead. Here's an example:
public static string GeneratePathWithTime(string cssFileName)
{
var serverFilePath = server.MapPath("~/static/" + cssFileName);
var version = File.GetLastWriteTime(serverFilePath).ToString("yyyyMMddhhmmss");
return string.Format("/static/{0}/{1}", version, cssFileName);
}
This will generate a path like "/static/201109231100/style.css" for "style.css" (assuming the your style.css is located in the static directory).
You'll then add a rewrite rule in IIS to rewrite "/static/201109231100/style.css" to "/static/style.css". The version number will only be changed when the css file has been modified and only applies to modified files.
2)
You can handle the request to 123.js via an HttpModule and send the latest content of it, but I don't think you can guarantee the request gets the latest version. It depends on how the browser handles its cache. You can set an earlier expiration time (for example, one minute ago) in your response header to tell the browsers to always re-download the file, but it's all up to the browser itself to decide whether to re-download the file or not. That's why we need to generate a different path for our modified files each time we updated our files in your question 1), the browser will always try to download the file if the URL has never been visited before.
I wrote a Url Helper which does the CacheBusting for me.
public static string CacheBustedContent(this UrlHelper helper, string contentPath)
{
var path = string.Empty;
if (helper.RequestContext.HttpContext.Cache["static-resource-" + contentPath] == null)
{
var fullpath = helper.RequestContext.HttpContext.Server.MapPath(contentPath);
var md5 = GetMD5HashFromFile(fullpath);
path = helper.Content(contentPath) + "?v=" + md5;
helper.RequestContext.HttpContext.Cache.Add("static-resource-" + contentPath, path, null, System.Web.Caching.Cache.NoAbsoluteExpiration, new TimeSpan(24, 0, 0), System.Web.Caching.CacheItemPriority.Default, null);
}
else
{
path = helper.RequestContext.HttpContext.Cache["static-resource-" + contentPath].ToString();
}
return path;
}
You could replace the GetMD5HashFromFile() with CRC or any other sort of call which generates a unique string based on the contents or last-modified-date of the file.
The downside is this'll get called whenever the cache is invalidated. And if you change the file on live somehow, but don't reset the application pool, you'll probably need to touch the web.config to get it to reload correctly.
You might want to have a look at Dean Hume's Blogpost MVC and the HTML5 Application Cache. In that post, he points out an elegant way of automatically handling versioning per request, using a class library of #ShirtlessKirk:
#Url.Content("~/Content/Site.css").AppendHash(Request)
This question is really old now, but if anyone stumbles upon it, here's to my knowledge the current state of the art:
In ASP.NET Core you can use TagHelpers and simply add the asp-append-version attribute to any <link> or <script> tag:
<script src="~/js/my.js" asp-append-version="true"></script>
For both ASP.NET Core and Framework there is a NuGet Package called WebOptimizer (https://github.com/ligershark/WebOptimizer). It allows for both bundling and minification, and will also append a content-based version string to your file.
If you want to do it yourself, there is the handy IFileVersionProvider interface, which you can get from your IServiceProvider in .NET Core:
// this example assumes, you at least have a HttpContext
var fileVersionProvider = httpContext.RequestServices.GetRequiredService<IFileVersionProvider>();
string path = httpContext.Content("/css/site.css");
string pathWithVersionString = fileVersionProvider.AddFileVersionToPath(httpContext.Request.PathBase, path);
For .NET Framework, you can get the FileVersionProvider source from here: https://github.com/dotnet/aspnetcore/blob/main/src/Mvc/Mvc.Razor/src/Infrastructure/DefaultFileVersionProvider.cs
You will have to do some work, like replacing the Cache with MemoryCache.Default or a ConcurrentDictionary or something, but the 'meat' is there.