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wxiaoguang 5b89670a31
Use a general Eval function for expressions in templates. (#23927)
One of the proposals in #23328

This PR introduces a simple expression calculator
(templates/eval/eval.go), it can do basic expression calculations.

Many untested template helper functions like `Mul` `Add` can be replaced
by this new approach.

Then these `Add` / `Mul` / `percentage` / `Subtract` / `DiffStatsWidth`
could all use this `Eval`.

And it provides enhancements for Golang templates, and improves
readability.

Some examples:

----

* Before: `{{Add (Mul $glyph.Row 12) 12}}`
* After: `{{Eval $glyph.Row "*" 12 "+" 12}}`

----

* Before: `{{if lt (Add $i 1) (len $.Topics)}}`
* After: `{{if Eval $i "+" 1 "<" (len $.Topics)}}`

## FAQ

### Why not use an existing expression package?

We need a highly customized expression engine:

* do the calculation on the fly, without pre-compiling
* deal with int/int64/float64 types, to make the result could be used in
Golang template.
* make the syntax could be used in the Golang template directly
* do not introduce too much complex or strange syntax, we just need a
simple calculator.
* it needs to strictly follow Golang template's behavior, for example,
Golang template treats all non-zero values as truth, but many 3rd
packages don't do so.

### What's the benefit?

* Developers don't need to add more `Add`/`Mul`/`Sub`-like functions,
they were getting more and more.
Now, only one `Eval` is enough for all cases.
* The new code reads better than old `{{Add (Mul $glyph.Row 12) 12}}`,
the old one isn't familiar to most procedural programming developers
(eg, the Golang expression syntax).
* The `Eval` is fully covered by tests, many old `Add`/`Mul`-like
functions were never tested.

### The performance?

It doesn't use `reflect`, it doesn't need to parse or compile when used
in Golang template, the performance is as fast as native Go template.

### Is it too complex? Could it be unstable?

The expression calculator program is a common homework for computer
science students, and it's widely used as a teaching and practicing
purpose for developers. The algorithm is pretty well-known.

The behavior can be clearly defined, it is stable.
2023-04-07 21:25:49 +08:00
.gitea Issue template form (#16349) 2021-09-15 20:33:13 +03:00
.github Improve pull_request_template.md (#22888) 2023-02-20 19:14:02 -05:00
assets Add meilisearch support (#23136) 2023-03-28 22:23:23 -04:00
build Try to catch more broken translations (#23867) 2023-04-03 11:12:47 +08:00
cmd Refactor internal API for git commands, use meaningful messages instead of "Internal Server Error" (#23687) 2023-03-29 14:32:26 +08:00
contrib Clean some legacy files and move some build files (#23699) 2023-03-25 16:22:51 -04:00
custom/conf Rename actions unit to repo.actions and add docs for it (#23733) 2023-04-03 00:05:37 -04:00
docker Wrap unless-check in docker manifests (#23079) 2023-02-22 16:33:31 -06:00
docs Merge push to create, open PR from push, and push options docs articles into one (#23744) 2023-04-07 07:36:19 +08:00
models Support "." char as user name for User/Orgs in RSS/ATOM/GPG/KEYS path ... (#23874) 2023-04-07 18:08:36 +08:00
modules Use a general Eval function for expressions in templates. (#23927) 2023-04-07 21:25:49 +08:00
options Title can be empty when creating tag only (#23917) 2023-04-06 21:44:52 -04:00
public Update JS deps (#23853) 2023-04-02 19:47:14 -04:00
routers Support "." char as user name for User/Orgs in RSS/ATOM/GPG/KEYS path ... (#23874) 2023-04-07 18:08:36 +08:00
services Title can be empty when creating tag only (#23917) 2023-04-06 21:44:52 -04:00
snap Remove unnecessary whitespace in snapcraft.yaml (#22090) 2022-12-10 08:31:16 -06:00
templates Use a general Eval function for expressions in templates. (#23927) 2023-04-07 21:25:49 +08:00
tests Support "." char as user name for User/Orgs in RSS/ATOM/GPG/KEYS path ... (#23874) 2023-04-07 18:08:36 +08:00
web_src Refactor authors dropdown (send get request from frontend to avoid long wait time) (#23890) 2023-04-07 08:11:02 +08:00
.air.toml Add more test directory to exclude dir of air, remove watching templates from air include dir because gitea has internal mechanism (#22246) 2022-12-27 14:00:34 +08:00
.changelog.yml Changelog for v1.15.0-rc1 (#16422) 2021-07-15 11:47:57 -04:00
.dockerignore Add .dockerignore (#21753) 2022-11-10 04:04:09 +01:00
.drone.yml Update JS deps (#23853) 2023-04-02 19:47:14 -04:00
.editorconfig Add markdownlint (#20512) 2022-07-28 09:22:47 +08:00
.eslintrc.yaml Remove jQuery ready usage (#23858) 2023-04-01 18:40:22 -04:00
.gitattributes Hook go-licenses into tidy again (#21353) 2022-10-10 20:45:02 +02:00
.gitignore Add go licenses to licenses.txt (#21034) 2022-09-04 00:20:46 +02:00
.gitpod.yml Add deps-docs command to makefile (#23686) 2023-03-24 14:42:31 -04:00
.golangci.yml Fix .golangci.yml (#22868) 2023-02-11 21:44:53 +00:00
.ignore Add some .ignore entries (#18296) 2022-01-16 17:26:15 +00:00
.lgtm refactor: ignore LGTM from author of pull request. (#3283) 2018-01-02 06:13:49 -06:00
.markdownlint.yaml Add markdownlint (#20512) 2022-07-28 09:22:47 +08:00
.npmrc Upgrade to npm lockfile v3 and explicitely set it (#23561) 2023-03-18 19:38:10 +01:00
.spectral.yaml Add spectral linter for Swagger (#20321) 2022-07-11 18:07:16 -05:00
.stylelintrc.yaml Update JS deps (#23853) 2023-04-02 19:47:14 -04:00
BSDmakefile Add BSDmakefile to prevent errors when make is called under FreeBSD (#4446) 2018-07-16 20:45:51 +02:00
build.go User/Org Feed render description as per web (#23887) 2023-04-04 04:39:47 +01:00
CHANGELOG.md Add CHANGELOG for 1.19.0 (#23583) 2023-03-20 15:42:23 +08:00
CODE_OF_CONDUCT.md Add Gitea Community Code of Conduct (#23188) 2023-03-09 10:49:34 +08:00
CONTRIBUTING.md Improving CONTRIBUTING.md for backport details (#23057) 2023-02-22 11:49:52 +08:00
DCO Remove address from DCO (#22595) 2023-01-24 18:52:38 +00:00
Dockerfile Hardcode path to docker images (#23955) 2023-04-07 02:41:49 -04:00
Dockerfile.rootless Hardcode path to docker images (#23955) 2023-04-07 02:41:49 -04:00
go.mod Do not crash when parsing an invalid workflow file (#23972) 2023-04-07 20:12:10 +08:00
go.sum Do not crash when parsing an invalid workflow file (#23972) 2023-04-07 20:12:10 +08:00
LICENSE Fix typo 2016-11-08 08:42:05 +01:00
main.go Add Bash and Zsh completion scripts (#22646) 2023-02-21 12:32:24 -05:00
MAINTAINERS Yarden Shoham has a new email address (#23767) 2023-03-28 18:24:08 +08:00
Makefile Remove -v from vulncheck (#23953) 2023-04-06 13:58:05 -05:00
package-lock.json Introduce GitHub markdown editor, keep EasyMDE as fallback (#23876) 2023-04-03 18:06:57 +08:00
package.json Introduce GitHub markdown editor, keep EasyMDE as fallback (#23876) 2023-04-03 18:06:57 +08:00
playwright.config.js Update JS dependencies and eslint config (#21388) 2022-10-10 20:02:20 +08:00
README_ZH.md link update in README files (#22582) 2023-01-23 15:57:57 -05:00
README.md link update in README files (#22582) 2023-01-23 15:57:57 -05:00
SECURITY.md Add markdownlint (#20512) 2022-07-28 09:22:47 +08:00
vitest.config.js Improve action log display with control chars (#23820) 2023-04-01 20:57:05 +08:00
webpack.config.js Introduce GiteaLocaleNumber custom element to handle number localization on pages. (#23861) 2023-04-03 12:58:09 -04:00

Gitea

Gitea - Git with a cup of tea

Contribute with Gitpod

View this document in Chinese

Purpose

The goal of this project is to make the easiest, fastest, and most painless way of setting up a self-hosted Git service.

As Gitea is written in Go, it works across all the platforms and architectures that are supported by Go, including Linux, macOS, and Windows on x86, amd64, ARM and PowerPC architectures. You can try it out using the online demo. This project has been forked from Gogs since November of 2016, but a lot has changed.

Building

From the root of the source tree, run:

TAGS="bindata" make build

or if SQLite support is required:

TAGS="bindata sqlite sqlite_unlock_notify" make build

The build target is split into two sub-targets:

  • make backend which requires Go Stable, required version is defined in go.mod.
  • make frontend which requires Node.js LTS or greater and Internet connectivity to download npm dependencies.

When building from the official source tarballs which include pre-built frontend files, the frontend target will not be triggered, making it possible to build without Node.js and Internet connectivity.

Parallelism (make -j <num>) is not supported.

More info: https://docs.gitea.io/en-us/install-from-source/

Using

./gitea web

NOTE: If you're interested in using our APIs, we have experimental support with documentation.

Contributing

Expected workflow is: Fork -> Patch -> Push -> Pull Request

NOTES:

  1. YOU MUST READ THE CONTRIBUTORS GUIDE BEFORE STARTING TO WORK ON A PULL REQUEST.
  2. If you have found a vulnerability in the project, please write privately to security@gitea.io. Thanks!

Translating

Translations are done through Crowdin. If you want to translate to a new language ask one of the managers in the Crowdin project to add a new language there.

You can also just create an issue for adding a language or ask on discord on the #translation channel. If you need context or find some translation issues, you can leave a comment on the string or ask on Discord. For general translation questions there is a section in the docs. Currently a bit empty but we hope to fill it as questions pop up.

https://docs.gitea.io/en-us/translation-guidelines/

Crowdin

Further information

For more information and instructions about how to install Gitea, please look at our documentation. If you have questions that are not covered by the documentation, you can get in contact with us on our Discord server or create a post in the discourse forum.

We maintain a list of Gitea-related projects at gitea/awesome-gitea.

The Hugo-based documentation theme is hosted at gitea/theme.

The official Gitea CLI is developed at gitea/tea.

Authors

Backers

Thank you to all our backers! 🙏 [Become a backer]

Sponsors

Support this project by becoming a sponsor. Your logo will show up here with a link to your website. [Become a sponsor]

FAQ

How do you pronounce Gitea?

Gitea is pronounced /ɡɪti:/ as in "gi-tea" with a hard g.

Why is this not hosted on a Gitea instance?

We're working on it.

License

This project is licensed under the MIT License. See the LICENSE file for the full license text.

Screenshots

Looking for an overview of the interface? Check it out!

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