checkout/src/ref-helper.ts
2019-12-03 10:28:59 -05:00

110 lines
2.8 KiB
TypeScript

import {IGitCommandManager} from './git-command-manager'
export interface ICheckoutInfo {
ref: string
startPoint: string
}
export async function getCheckoutInfo(
git: IGitCommandManager,
ref: string,
commit: string
): Promise<ICheckoutInfo> {
if (!git) {
throw new Error('Arg git cannot be empty')
}
if (!ref && !commit) {
throw new Error('Args ref and commit cannot both be empty')
}
const result = ({} as unknown) as ICheckoutInfo
const upperRef = (ref || '').toUpperCase()
// SHA only
if (!ref) {
result.ref = commit
}
// refs/heads/
else if (upperRef.startsWith('REFS/HEADS/')) {
const branch = ref.substring('refs/heads/'.length)
result.ref = branch
result.startPoint = `refs/remotes/origin/${branch}`
}
// refs/pull/
else if (upperRef.startsWith('REFS/PULL/')) {
const branch = ref.substring('refs/pull/'.length)
result.ref = `refs/remotes/pull/${branch}`
}
// refs/tags/
else if (upperRef.startsWith('REFS/')) {
result.ref = ref
}
// Unqualified ref, check for a matching branch or tag
else {
if (await git.branchExists(true, `origin/${ref}`)) {
result.ref = ref
result.startPoint = `refs/remotes/origin/${ref}`
} else if (await git.tagExists(`${ref}`)) {
result.ref = `refs/tags/${ref}`
} else {
throw new Error(
`A branch or tag with the name '${ref}' could not be found`
)
}
}
return result
}
export function getRefSpec(ref: string, commit: string): string[] {
if (!ref && !commit) {
throw new Error('Args ref and commit cannot both be empty')
}
const upperRef = (ref || '').toUpperCase()
// SHA
if (commit) {
// refs/heads
if (upperRef.startsWith('REFS/HEADS/')) {
const branch = ref.substring('refs/heads/'.length)
return [`+${commit}:refs/remotes/origin/${branch}`]
}
// refs/pull/
else if (upperRef.startsWith('REFS/PULL/')) {
const branch = ref.substring('refs/pull/'.length)
return [`+${commit}:refs/remotes/pull/${branch}`]
}
// refs/tags/
else if (upperRef.startsWith('REFS/TAGS/')) {
return [`+${commit}:${ref}`]
}
// Otherwise no destination ref
else {
return [commit]
}
}
// Unqualified ref, check for a matching branch or tag
else if (!upperRef.startsWith('REFS/')) {
return [
`+refs/heads/${ref}*:refs/remotes/origin/${ref}*`,
`+refs/tags/${ref}*:refs/tags/${ref}*`
]
}
// refs/heads/
else if (upperRef.startsWith('REFS/HEADS/')) {
const branch = ref.substring('refs/heads/'.length)
return [`+${ref}:refs/remotes/origin/${branch}`]
}
// refs/pull/
else if (upperRef.startsWith('REFS/PULL/')) {
const branch = ref.substring('refs/pull/'.length)
return [`+${ref}:refs/remotes/pull/${branch}`]
}
// refs/tags/
else {
return [`+${ref}:${ref}`]
}
}