fix: Don't fail when there are no releases

src/commands/prepare.ts

@@ -242,17 +242,25 @@ export async function runPreReleaseCommand(
     // Not running pre-release command
     logger.warn('Not running the pre-release command: no command specified');
     return false;
-  } else if (preReleaseCommand) {
+  }
+
+  // This is a workaround for the case when the old version is empty, which
+  // should only happen when the project is new and has no version yet.
+  // Instead of using an empty string, we use "0.0.0" as the old version to
+  // avoid breaking the pre-release command as most scripts expect a non-empty
+  // version string.
+  const nonEmptyOldVersion = oldVersion || '0.0.0';
+  if (preReleaseCommand) {
     [sysCommand, ...args] = shellQuote.parse(preReleaseCommand) as string[];
   } else {
     sysCommand = '/bin/bash';
     args = [DEFAULT_BUMP_VERSION_PATH];
   }
-  args = [...args, oldVersion, newVersion];
-  logger.info(`Running the pre-release command...`);
+  args = [...args, nonEmptyOldVersion, newVersion];
+  logger.info('Running the pre-release command...');
   const additionalEnv = {
     CRAFT_NEW_VERSION: newVersion,
-    CRAFT_OLD_VERSION: oldVersion,
+    CRAFT_OLD_VERSION: nonEmptyOldVersion,
   };
   await spawnProcess(sysCommand, args, {
     env: { ...process.env, ...additionalEnv },
@@ -354,7 +362,9 @@ async function prepareChangelog(
       `Changelog policy is set to "${changelogPolicy}", nothing to do.`
     );
     return;
-  } else if (
+  }
+
+  if (
     changelogPolicy !== ChangelogPolicy.Auto &&
     changelogPolicy !== ChangelogPolicy.Simple
   ) {

src/utils/git.ts

@@ -1,4 +1,4 @@
-import simpleGit, { SimpleGit } from 'simple-git';
+import simpleGit, { type SimpleGit, type LogOptions, type Options } from 'simple-git';
 
 import { getConfigFileDir } from '../config';
 import { ConfigurationError } from './errors';
@@ -20,6 +20,8 @@ export interface GitChange {
 // https://docs.github.com/en/rest/commits/commits#list-pull-requests-associated-with-a-commit
 export const PRExtractor = /(?<=\(#)\d+(?=\)$)/;
 
+export const defaultInitialTag = '0.0.0';
+
 export async function getDefaultBranch(
   git: SimpleGit,
   remoteName: string
@@ -34,16 +36,26 @@ export async function getDefaultBranch(
 }
 
 export async function getLatestTag(git: SimpleGit): Promise<string> {
-  // This part is courtesy of https://stackoverflow.com/a/7261049/90297
-  return (await git.raw('describe', '--tags', '--abbrev=0')).trim();
+  try {
+    // This part is courtesy of https://stackoverflow.com/a/7261049/90297
+    return (await git.raw('describe', '--tags', '--abbrev=0')).trim();
+  } catch (err) {
+    // If there are no tags, return an empty string
+    if (
+      err instanceof Error &&
+      err.message.startsWith('fatal: No names found')
+    ) {
+      return '';
+    }
+    throw err;
+  }
 }
 
 export async function getChangesSince(
   git: SimpleGit,
   rev: string
 ): Promise<GitChange[]> {
-  const { all: commits } = await git.log({
-    from: rev,
+  const gitLogArgs: Options | LogOptions = {
     to: 'HEAD',
     // The symmetric option defaults to true, giving us all the different commits
     // reachable from both `from` and `to` whereas what we are interested in is only the ones
@@ -57,7 +69,12 @@ export async function getChangesSince(
     // this should still return all commits for individual repos when run from
     // the repo root.
     file: '.',
-  });
+  };
+
+  if (rev) {
+			gitLogArgs.from = rev;
+  }
+  const { all: commits } = await git.log(gitLogArgs);
   return commits.map(commit => ({
     hash: commit.hash,
     title: commit.message,
@@ -71,7 +88,7 @@ export function stripRemoteName(
   remoteName: string
 ): string {
   const branchName = branch || '';
-  const remotePrefix = remoteName + '/';
+  const remotePrefix = `${remoteName}/`;
   if (branchName.startsWith(remotePrefix)) {
     return branchName.slice(remotePrefix.length);
   }
@@ -82,7 +99,7 @@ export async function getGitClient(): Promise<SimpleGit> {
   const configFileDir = getConfigFileDir() || '.';
   // Move to the directory where the config file is located
   process.chdir(configFileDir);
-  logger.debug(`Working directory:`, process.cwd());
+  logger.debug("Working directory:", process.cwd());
 
   const git = simpleGit(configFileDir);
   const isRepo = await git.checkIsRepo();