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trim only ascii whitespace for branch (#2521)

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* trim only ascii whitespace for branch

* rebuild
This commit is contained in:
Aiqiao Yan
2026-07-15 15:05:42 -04:00
committed by GitHub
parent 62661c4e71
commit 12cd2235ef
3 changed files with 80 additions and 8 deletions
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src/input-helper.ts
+19 -2
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@@ -59,6 +59,23 @@ export async function getInputs(): Promise<IGitSourceSettings> {
// Source branch, source version
result.ref = core.getInput('ref')
// core.getInput()'s default trim strips a range of Unicode characters such as a
// leading BOM (U+FEFF) or NBSP (U+00A0). Those are valid in a git ref name, so
// a fork branch named "<BOM>" + 40 hex chars would trim down to a bare SHA and
// be silently reclassified as a commit, bypassing the unsafe fork PR checkout
// guard.
//
// The trim below strips only the ASCII whitespace characters which are all forbidden
// in a git branch name.
// \t U+0009 horizontal tab - ASCII control, forbidden in ref names
// \n U+000A line feed - ASCII control, forbidden in ref names
// \v U+000B vertical tab - ASCII control, forbidden in ref names
// \f U+000C form feed - ASCII control, forbidden in ref names
// \r U+000D carriage return - ASCII control, forbidden in ref names
// ' ' U+0020 space - forbidden in ref names
const asciiTrimmedRef = core
.getInput('ref', {trimWhitespace: false})
.replace(/^[\t\n\v\f\r ]+|[\t\n\v\f\r ]+$/g, '')
if (!result.ref) {
if (isWorkflowRepository) {
result.ref = github.context.ref
@@ -72,8 +89,8 @@ export async function getInputs(): Promise<IGitSourceSettings> {
}
}
// SHA?
else if (result.ref.match(/^(?:[0-9a-fA-F]{40}|[0-9a-fA-F]{64})$/)) {
result.commit = result.ref
else if (asciiTrimmedRef.match(/^(?:[0-9a-fA-F]{40}|[0-9a-fA-F]{64})$/)) {
result.commit = asciiTrimmedRef
result.ref = ''
}
core.debug(`ref = '${result.ref}'`)