Tag pattern: use hash of referenced commit not of tag itself

Author: sigurdm

lib/src/source/git.dart

@@ -772,8 +772,9 @@ class GitSource extends CachedSource {
       '--list',
       '--format',
       // We can use space here, as it is not allowed in a git tag
-      // https://git-scm.com/docs/git-check-ref-format
-      '%(refname:lstrip=2) %(objectname)',
+      // https://git-scm.com/docs/git-check-ref-format The `*` means we list the
+      // hash of the tagged object, not the tag itself.
+      '%(refname:lstrip=2) %(*objectname)',
     ], workingDir: path);
     final lines = output.trim().split('\n');
     final result = <TaggedVersion>[];

test/get/git/tag_pattern_test.dart

@@ -379,4 +379,62 @@ void main() {
       });
     },
   );
+
+  test(
+    'Multiple path dependencies to same package work (regression https://github.com/dart-lang/pub/issues/4706)',
+    () async {
+      await d.git('foo.git', [
+        d.dir('one', [
+          d.libPubspec(
+            'one',
+            '1.0.0',
+            sdk: '^3.9.0',
+            deps: {
+              'two': {'path': '../two'},
+              'three': {'path': '../three'},
+            },
+          ),
+        ]),
+        d.dir('two', [
+          d.libPubspec(
+            'two',
+            '1.0.0',
+            sdk: '^3.9.0',
+            deps: {
+              'three': {'path': '../three'},
+            },
+          ),
+        ]),
+        d.dir('three', [d.libPubspec('three', '1.0.0', sdk: '^3.9.0')]),
+      ]).create();
+      await d.git('foo.git', []).tag('1.0.0');
+
+      await d
+          .appDir(
+            dependencies: {
+              'one': {
+                'git': {
+                  'url': '../foo.git',
+                  'path': 'one',
+                  'tag_pattern': '{{version}}',
+                },
+                'version': '^1.0.0',
+              },
+            },
+            pubspec: {
+              'environment': {'sdk': '^3.9.0'},
+            },
+          )
+          .create();
+
+      await pubGet(
+        output: allOf(
+          contains('+ one 1.0.0'),
+          contains('+ two 1.0.0'),
+          contains('+ three 1.0.0'),
+        ),
+        environment: {'_PUB_TEST_SDK_VERSION': '3.9.0'},
+      );
+    },
+  );
 }