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import { Commit as NodeGitCommit, Oid as NodeGitOid } from "nodegit";
import { Author } from "api";
import { Diff } from "./diff";
import { Repository } from "./repository";
import { Tree } from "./tree";
import { createMessage, readKey, readSignature, verify } from "openpgp";
import { promisify } from "util";
import { exec } from "child_process";
import { findAsync } from "./misc";
import { CommitError, createError } from "./error";
const pExec = promisify(exec);
export type CommitSummary = {
id: string,
message: string,
date: number
}
type DiffStats = {
insertions: number,
deletions: number,
files_changed: number
}
/**
* A author of a commit
*/
export class CommitAuthor implements Author {
private _ng_commit: NodeGitCommit;
constructor(ng_commit: NodeGitCommit) {
this._ng_commit = ng_commit;
}
public get name(): string {
return this._ng_commit.author().name();
}
public get email(): string {
return this._ng_commit.author().email();
}
/**
* Returns the public key fingerprint of the commit's signer.
*/
public async fingerprint(): Promise<string> {
const basic_signature = await this._ng_commit.getSignature().catch(() => {
throw(createError(CommitError, 500, "Commit isn't signed!"));
});
const message = await createMessage({ text: basic_signature.signedData });
const pub_keys_list = await pExec("gpg --list-public-keys");
if(pub_keys_list.stderr) {
throw(createError(CommitError, 500, "Failed to get public keys from gpg!"));
}
const pub_keys = pub_keys_list.stdout
.split("\n")
.slice(2, -1)
.join("\n")
.split(/^\n/gm);
// Find a public key that matches the signature
const pub_key = await findAsync(pub_keys, async key => {
// Make sure the UID is the same as the commit author
const uid = key
.split("\n")[2]
.replace(/^uid\s*\[.*\]\s/, "");
if(uid !== `${this.name} <${this.email}>`) {
return false;
}
// Get the public key as an armored key
const fingerprint = key.split("\n")[1].replace(/^\s*/, "");
const key_export = await pExec(`gpg --armor --export ${fingerprint}`);
if(key_export.stderr) {
throw(createError(CommitError, 500, "Failed to export a public key from gpg!"));
}
const signature = await readSignature({ armoredSignature: basic_signature.signature });
const verification = await verify({
message: message,
verificationKeys: await readKey({ armoredKey: key_export.stdout }),
expectSigned: true,
signature: signature
})
.then(result => result.signatures[0].verified)
.catch(() => Promise.resolve(false));
return verification;
});
if(!pub_key) {
throw(createError(CommitError, 500, "Failed to find a public key matching the commit signature!"));
}
return pub_key
.split("\n")[1]
.replace(/^\s*/, "");
}
}
/**
* A representation of a commit
*/
export class Commit {
private _ng_commit: NodeGitCommit;
private _owner: Repository;
public id: string;
public date: number;
public message: string;
/**
* @param owner - The repository which the commit is in
* @param commit - An instance of a Nodegit commit
*/
constructor(owner: Repository, commit: NodeGitCommit) {
this._ng_commit = commit;
this._owner = owner;
this.id = commit.sha();
this.date = commit.time();
this.message = commit.message();
}
/**
* Returns the commit's author
*
* @returns An instance of a commit author
*/
public author(): CommitAuthor {
return new CommitAuthor(this._ng_commit);
}
/**
* Returns the commit's diff
*
* @returns An instance of a diff
*/
public async diff(): Promise<Diff> {
return new Diff((await this._ng_commit.getDiff())[0]);
}
/**
* Returns the commit's stats
*
* @returns A diff stats instance
*/
public async stats(): Promise<DiffStats> {
const stats = await (await this._ng_commit.getDiff())[0].getStats();
return {
insertions: <number>stats.insertions(),
deletions: <number>stats.deletions(),
files_changed: <number>stats.filesChanged()
};
}
/**
* Returns the commit's tree
*
* @returns An instance of a tree
*/
public async tree(): Promise<Tree> {
return new Tree(this._owner, await this._ng_commit.getTree());
}
/**
* Returns whether or not the commit is signed
*/
public isSigned(): Promise<boolean> {
return this._ng_commit.getSignature()
.then(() => true)
.catch(() => false);
}
/**
* Lookup a commit
*
* @param repository - The repository which the commit is in
* @param id - The SHA of a commit
* @returns An instance of a commit
*/
public static async lookup(repository: Repository, id: string | NodeGitOid): Promise<Commit> {
const commit = await NodeGitCommit.lookup(repository.ng_repository, id instanceof NodeGitOid ? id : NodeGitOid.fromString(id));
return new Commit(repository, commit);
}
/**
* Returns if an commit exists or not
*
* @param repository - The repository which the commit is in
* @param id - The sha of a commit
* @returns Whether or not the commit exists
*/
public static lookupExists(repository: Repository, id: string): Promise<boolean> {
return NodeGitCommit.lookup(repository.ng_repository, NodeGitOid.fromString(id))
.then(() => true)
.catch(() => false);
}
/**
* Returns the most recent commit of the repository's branch
*
* @param owner - A repository
* @returns An instance of a commit
*/
public static async branchCommit(owner: Repository): Promise<Commit> {
return new Commit(owner, await owner.ng_repository.getBranchCommit(owner.branch_name));
}
}
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