diff --git a/tools/publish-dev/index.js b/tools/publish-dev/index.js
index 7f8111a..1bf8202 100644
--- a/tools/publish-dev/index.js
+++ b/tools/publish-dev/index.js
@@ -1,59 +1,13 @@
 "use strict";
 
-const cp = require( "child_process" );
-const fs = require( "fs" );
-const path = require( "path" );
-
-// paths
-
-const packagejson = require.resolve( "pegjs/package.json" );
-const pegjs = path.dirname( packagejson );
-const npmignore = path.join( pegjs, ".npmignore" );
-const npmrc = path.join( pegjs, ".npmrc" );
-
-// variabes
-
-const APP = require( "./package.json" ).name;
-const VERSION = require( packagejson ).version;
+const publish = require( "./publish" );
 
 const {
 
     BUILD_REASON,
-    GIT_BRANCH,
-    NPM_TOKEN,
-
-} = process.env;
-
-let {
-
-    GIT_COMMIT_SHA,
 
 } = process.env;
 
-if ( GIT_COMMIT_SHA === "not-found" ) GIT_COMMIT_SHA = GIT_BRANCH;
-
-// local helpers
-
-function die( err ) {
-
-    console.error( err );
-    process.exit( 1 );
-
-}
-
-function exec( command, print = true ) {
-
-    const result = cp.execSync( command, {
-        cwd: pegjs,
-        stdio: print ? "inherit" : void 0,
-    } );
-
-    return print ? void 0 : result.toString( "utf8" );
-
-}
-
-// assertions
-
 if ( BUILD_REASON && BUILD_REASON === "PullRequest" ) {
 
     console.log( "Skipping publish, PR's are not published." );
@@ -61,21 +15,4 @@ if ( BUILD_REASON && BUILD_REASON === "PullRequest" ) {
 
 }
 
-if ( ! GIT_BRANCH ) die( "`process.env.GIT_BRANCH` is required by " + APP );
-if ( ! NPM_TOKEN ) die( "`process.env.NPM_TOKEN` is required by " + APP );
-
-// update version field in `pegjs/package.json`
-
-const GIT_COMMIT_SHORT_SHA = exec( "git rev-parse --short " + GIT_COMMIT_SHA, false );
-const dev = `${ VERSION }-${ GIT_BRANCH }.${ GIT_COMMIT_SHORT_SHA }`;
-
-exec( `npm --no-git-tag-version -f version ${ dev }` );
-
-// publish pegjs@dev
-
-fs.writeFileSync( npmrc, `//registry.npmjs.org/:_authToken=${ NPM_TOKEN }` );
-fs.unlinkSync( npmignore );
-
-exec( "npm publish --tag=dev" );
-
-fs.unlinkSync( npmrc );
+publish( "pegjs" );
diff --git a/tools/publish-dev/publish.js b/tools/publish-dev/publish.js
new file mode 100644
index 0000000..e4e2fd8
--- /dev/null
+++ b/tools/publish-dev/publish.js
@@ -0,0 +1,82 @@
+"use strict";
+
+const cp = require( "child_process" );
+const fs = require( "fs" );
+const path = require( "path" );
+
+function publish( id ) {
+
+    // paths
+
+    const packagejson = require.resolve( id + "/package.json" );
+    const directory = path.dirname( packagejson );
+    const npmignore = path.join( directory, ".npmignore" );
+    const npmrc = path.join( directory, ".npmrc" );
+
+    // variabes
+
+    const APP = require( "./package.json" ).name;
+    const VERSION = require( packagejson ).version;
+
+    const {
+
+        GIT_BRANCH,
+        NPM_TOKEN,
+
+    } = process.env;
+
+    let {
+
+        GIT_COMMIT_SHA,
+
+    } = process.env;
+
+    if ( GIT_COMMIT_SHA === "not-found" ) GIT_COMMIT_SHA = GIT_BRANCH;
+
+    // local helpers
+
+    function die( err ) {
+
+        console.error( err );
+        process.exit( 1 );
+
+    }
+
+    function exec( command, print = true ) {
+
+        const result = cp.execSync( command, {
+            cwd: directory,
+            stdio: print ? "inherit" : void 0,
+        } );
+
+        return print ? void 0 : result.toString( "utf8" );
+
+    }
+
+    // assertions
+
+    if ( ! GIT_BRANCH ) die( "`process.env.GIT_BRANCH` is required by " + APP );
+    if ( ! NPM_TOKEN ) die( "`process.env.NPM_TOKEN` is required by " + APP );
+
+    // update version field in `<package>/package.json`
+
+    const GIT_COMMIT_SHORT_SHA = exec( "git rev-parse --short " + GIT_COMMIT_SHA, false );
+    const dev = `${ VERSION }-${ GIT_BRANCH }.${ GIT_COMMIT_SHORT_SHA }`;
+
+    exec( `npm --no-git-tag-version -f version ${ dev }` );
+
+    // add npm token and remove ignore file (this is a DEV release after all)
+
+    fs.writeFileSync( npmrc, `//registry.npmjs.org/:_authToken=${ NPM_TOKEN }` );
+
+    if ( fs.existsSync( npmignore ) ) fs.unlinkSync( npmignore );
+
+    // publish <package>@dev
+
+    exec( "npm publish --tag=dev" );
+
+    fs.unlinkSync( npmrc );
+
+}
+
+module.exports = publish;