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Support lts/-n aliases (#481)

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This commit is contained in:
Jack Bates
2022-06-02 03:30:33 -07:00
committed by GitHub
parent ed1a46e9f2
commit eeb10cff27
6 changed files with 309 additions and 302 deletions
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18
src/installer.ts
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@@ -223,13 +223,21 @@ function resolveLtsAliasFromManifest(
core.debug(`LTS alias '${alias}' for Node version '${versionSpec}'`);
// Supported formats are `lts/<alias>` and `lts/*`. Where asterisk means highest possible LTS.
// Supported formats are `lts/<alias>`, `lts/*`, and `lts/-n`. Where asterisk means highest possible LTS and -n means the nth-highest.
const n = Number(alias);
const aliases = Object.fromEntries(
manifest
.filter(x => x.lts && x.stable === stable)
.map(x => [x.lts!.toLowerCase(), x])
.reverse()
);
const numbered = Object.values(aliases);
const release =
alias === '*'
? manifest.find(x => !!x.lts && x.stable === stable)
: manifest.find(
x => x.lts?.toLowerCase() === alias && x.stable === stable
);
? numbered[numbered.length - 1]
: n < 0
? numbered[numbered.length - 1 + n]
: aliases[alias];
if (!release) {
throw new Error(