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functions.ts
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functions.ts
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import { GemVersion, MaybeGemVersion, Platform } from './ruby/gem-version';
export { valid, prerelease, platform, major, minor, patch, inc };
type Segment = string | number;
const inc = (): never => {
throw new Error('Not implemented');
};
function valid(v: MaybeGemVersion): string | null {
if (!v) {
return null;
}
try {
return GemVersion.create(v).toString();
} catch (err) {
return null;
}
}
function prerelease(v: MaybeGemVersion): Segment[] | null {
try {
const version = GemVersion.create(v);
if (version.isPrerelease()) {
const segments = version.getSegments();
const preStartIndex = segments.findIndex(
(s) => typeof s === 'string' && /[a-zA-Z]/.test(s),
);
return segments.slice(preStartIndex);
} else {
return null;
}
} catch (err) {
return null;
}
}
function platform(v: MaybeGemVersion): Platform | null {
try {
const version = GemVersion.create(v);
if (version.platform) {
return version.platform
} else {
return null;
}
} catch (err) {
return null;
}
}
function _segmentAt(v, index): Segment | null {
try {
const segment = GemVersion.create(v).getSegments()[index];
return segment === undefined ? null : segment;
} catch (err) {
return null;
}
}
function major(v: MaybeGemVersion): Segment | null {
return _segmentAt(v, 0);
}
function minor(v: MaybeGemVersion): Segment | null {
return _segmentAt(v, 1);
}
function patch(v: MaybeGemVersion): Segment | null {
return _segmentAt(v, 2);
}