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Use a general approach to access custom/static/builtin assets (#24022)

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The idea is to use a Layered Asset File-system (modules/assetfs/layered.go)

For example: when there are 2 layers: "custom", "builtin", when access
to asset "my/page.tmpl", the Layered Asset File-system will first try to
use "custom" assets, if not found, then use "builtin" assets.

This approach will hugely simplify a lot of code, make them testable.

Other changes:

* Simplify the AssetsHandlerFunc code
* Simplify the `gitea embedded` sub-command code

---------

Co-authored-by: Jason Song <i@wolfogre.com>
Co-authored-by: Lunny Xiao <xiaolunwen@gmail.com>
This commit is contained in:
wxiaoguang 2023-04-12 18:16:45 +08:00 • committed by GitHub
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commit 50a72e7a83
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19
modules/util/path.go
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@ -74,29 +74,28 @@ const pathSeparator = string(os.PathSeparator)
//
// {`/foo`, ``, `bar`} => `/foo/bar`
// {`/foo`, `..`, `bar`} => `/foo/bar`
func FilePathJoinAbs(elem ...string) string {
elems := make([]string, len(elem))
func FilePathJoinAbs(base string, sub ...string) string {
elems := make([]string, 1, len(sub)+1)
// POISX filesystem can have `\` in file names. Windows: `\` and `/` are both used for path separators
// POSIX filesystem can have `\` in file names. Windows: `\` and `/` are both used for path separators
// to keep the behavior consistent, we do not allow `\` in file names, replace all `\` with `/`
if isOSWindows() {
elems[0] = filepath.Clean(elem[0])
elems[0] = filepath.Clean(base)
} else {
elems[0] = filepath.Clean(strings.ReplaceAll(elem[0], "\\", pathSeparator))
elems[0] = filepath.Clean(strings.ReplaceAll(base, "\\", pathSeparator))
}
if !filepath.IsAbs(elems[0]) {
// This shouldn't happen. If there is really necessary to pass in relative path, return the full path with filepath.Abs() instead
panic(fmt.Sprintf("FilePathJoinAbs: %q (for path %v) is not absolute, do not guess a relative path based on current working directory", elems[0], elems))
}
for i := 1; i < len(elem); i++ {
if elem[i] == "" {
for _, s := range sub {
if s == "" {
continue
}
if isOSWindows() {
elems[i] = filepath.Clean(pathSeparator + elem[i])
elems = append(elems, filepath.Clean(pathSeparator+s))
} else {
elems[i] = filepath.Clean(pathSeparator + strings.ReplaceAll(elem[i], "\\", pathSeparator))
elems = append(elems, filepath.Clean(pathSeparator+strings.ReplaceAll(s, "\\", pathSeparator)))
}
}
// the elems[0] must be an absolute path, just join them together