.gitignore

 /.cache
-/bazel-bin
-/bazel-testlogs
-/bazel-rules_toolchain
-/bazel-out
+/bazel-*
 /.bazelrc.user
 /node_modules

.gitlab-ci.yml

 include:
-  - component: "${CI_SERVER_HOST}/ci/component/bazelisk/bazelisk@v1.0.0-beta.2"
+  - component: "${CI_SERVER_HOST}/ci/component/bazelisk/bazelisk@v1.0.0-beta.3"
 
 default:
   tags:

CHANGELOG.md

+# [1.0.0-beta.4](https://git.gitlab.arm.com/bazel/toolchain_utils/compare/v1.0.0-beta.3...v1.0.0-beta.4) (2024-03-25)
+
+### Bug Fixes
+
+- **export.symlink:** support multiple identical exports ([07a9c2c](https://git.gitlab.arm.com/bazel/toolchain_utils/commit/07a9c2c832997967deaed6a8257789a03bf3450b))
+
 # [1.0.0-beta.3](https://git.gitlab.arm.com/bazel/toolchain_utils/compare/v1.0.0-beta.2...v1.0.0-beta.3) (2024-02-23)
 
 ### Features

MODULE.bazel

 module(
     name = "toolchain_utils",
-    version = "1.0.0-beta.3",
+    version = "1.0.0-beta.4",
     bazel_compatibility = [
         ">=7.0.0",
     ],

e2e/MODULE.bazel

@@ -5,6 +5,7 @@ module(
     ],
 )
 
+bazel_dep(name = "rules_diff", version = "1.0.0-alpha.3")
 bazel_dep(name = "bazel_skylib", version = "1.4.2")
 bazel_dep(name = "toolchain_utils", version = "0.0.0")
 local_path_override(
@@ -72,4 +73,8 @@ export.symlink(
     name = "export",
     target = "@fixture",
 )
+export.symlink(
+    name = "export",
+    target = "@fixture",
+)
 use_repo(export, "export")

e2e/export/BUILD.bazel

-load("@bazel_skylib//rules:diff_test.bzl", "diff_test")
+load("@rules_diff//diff/file/test:defs.bzl", "diff_file_test")
 
-diff_test(
+diff_file_test(
     name = "hello-world",
     size = "small",
-    file1 = "@export//:test/fixture/hello-world.txt",
-    file2 = "//test/fixture:hello-world.txt",
+    a = "@export//:test/fixture/hello-world.txt",
+    b = "//test/fixture:hello-world.txt",
 )

e2e/local/select/BUILD.bazel

-load("@bazel_skylib//rules:diff_test.bzl", "diff_test")
+load("@rules_diff//diff/file/test:defs.bzl", "diff_file_test")
 
-diff_test(
+diff_file_test(
     name = "hello-world",
     size = "small",
-    file1 = "@fixture//:test/fixture/hello-world.txt",
-    file2 = "//test/fixture:hello-world.txt",
+    a = "@fixture//:test/fixture/hello-world.txt",
+    b = "//test/fixture:hello-world.txt",
 )

e2e/local/triplet/BUILD.bazel

 load("@toolchain_utils//toolchain/triplet:local.bzl", "TRIPLET")
-load("@bazel_skylib//rules:diff_test.bzl", "diff_test")
+load("@rules_diff//diff/file/test:defs.bzl", "diff_file_test")
 load("@bazel_skylib//rules:write_file.bzl", "write_file")
 
 write_file(
@@ -8,9 +8,9 @@ write_file(
     content = [TRIPLET.value],
 )
 
-diff_test(
+diff_file_test(
     name = "test",
     size = "small",
-    file1 = ":expected",
-    file2 = "@toolchain_utils//toolchain/triplet:local",
+    a = ":expected",
+    b = "@toolchain_utils//toolchain/triplet:local",
 )

toolchain/export/extension.bzl

@@ -73,9 +73,21 @@ TAGS = {
 }
 
 def implementation(mctx):
+    symlinks = {}
+
     for mod in mctx.modules:
-        for d in mod.tags.symlink:
-            _symlink(name = d.name, **{a: getattr(d, a) for a in _ATTRS})
+        for tag in mod.tags.symlink:
+            attrs = {a: getattr(tag, a) for a in _ATTRS}
+            if tag.name not in symlinks:
+                symlinks[tag.name] = (mod, attrs)
+                continue
+
+            m, a = symlinks[tag.name]
+            if a != attrs:
+                fail("`{}@{}` exports `{}` but it is already exported with different attributes by `{}@{}`".format(mod.name, mod.version or "<version>", tag.name, m.name, m.version or "<version>"))
+
+    for name, (_, attrs) in symlinks.items():
+        _symlink(name = name, **attrs)
 
 export = module_extension(
     doc = DOC,