feat: support uncompressing symlink

.gitignore

@@ -3,4 +3,5 @@ npm-debug.log*
 coverage
 .vscode
 test/fixtures/types/*.js
-yarn.lock
+yarn.lock
+!test/fixtures/symlink/node_modules

.travis.yml

@@ -5,9 +5,11 @@ node_js:
   - '6'
   - '8'
   - '10'
-  - '11'
+  - '12'
+before_install:
+  - npm i npminstall -g
 install:
-  - npm i npminstall && npminstall
+  - npminstall
 script:
   - npm run ci
 after_script:

appveyor.yml

@@ -4,7 +4,7 @@ environment:
     - nodejs_version: '6'
     - nodejs_version: '8'
     - nodejs_version: '10'
-    - nodejs_version: '11'
+    - nodejs_version: '12'
 
 install:
   - ps: Install-Product node $env:nodejs_version

lib/utils.js

@@ -118,6 +118,14 @@ exports.makeUncompressFn = StreamClass => {
                   done();
                 });
               });
+            } else if (header.type === 'symlink') {
+              // symlink
+              const src = path.join(destDir, header.name);
+              const target = path.resolve(path.dirname(src), header.linkname);
+              fs.symlink(target, src, err => {
+                if (err) return reject(err);
+                stream.resume();
+              });
             } else { // directory
               mkdirp(path.join(destDir, header.name), err => {
                 if (err) return reject(err);

package.json

@@ -65,7 +65,7 @@
     "node": ">= 4.0.0"
   },
   "ci": {
-    "version": "4, 6, 8, 10, 11",
+    "version": "4, 6, 8, 10, 12",
     "license": {
       "year": "2017",
       "fullname": "node-modules and other contributors"

test/fixtures/symlink/README.md

@@ -0,0 +1 @@
+./node_modules/_enums@1.0.3@enums/README.md

test/fixtures/symlink/cli

@@ -0,0 +1 @@
+node_modules/cli

test/tgz/index.test.js

@@ -167,6 +167,28 @@ describe('test/tgz/index.test.js', () => {
       assert(originStat.mode === destStat.mode);
     });
 
+    it.only('tgz.uncompress(sourceFile, destDir) with symlink', function* () {
+      const sourceFile = path.join(__dirname, '..', 'fixtures', 'symlink.tgz');
+      const destDir = path.join(os.tmpdir(), uuid.v4());
+      const originalDir = path.join(__dirname, '..', 'fixtures', 'symlink');
+      yield compressing.tgz.uncompress(sourceFile, destDir);
+      console.log(destDir);
+
+      assert(fs.lstatSync(path.join(destDir, 'README.md')).isSymbolicLink());
+      assert(fs.lstatSync(path.join(destDir, 'cli')).isSymbolicLink());
+      assert(fs.lstatSync(path.join(destDir, 'node_modules/enums')).isSymbolicLink());
+      assert(fs.readFileSync(path.join(destDir, 'README.md'), 'utf-8').includes('Usage'));
+
+      const res = dircompare.compareSync(originalDir, destDir);
+      assert(res.distinct === 0);
+
+      const destStat = fs.lstatSync(path.join(destDir, 'cli'));
+      const originStat = fs.lstatSync(path.join(originalDir, 'cli'));
+      const format = stats => '0' + (stats.mode & parseInt('777', 8)).toString(8);
+      console.log(format(destStat), format(originStat));
+      assert(originStat.mode === destStat.mode);
+    });
+
     it('tgz.uncompress(sourceStream, destDir)', function* () {
       const sourceStream = fs.createReadStream(path.join(__dirname, '..', 'fixtures', 'xxx.tgz'));
       const destDir = path.join(os.tmpdir(), uuid.v4());