Feat: multi instance support with doxyfile_prefix

.github/workflows/ci.yml

@@ -47,7 +47,7 @@ jobs:
     runs-on: ${{ matrix.os }}
 
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6
       - name: Create .bazelversion file
         working-directory: examples
         run: echo "${{ matrix.bazel }}" > .bazelversion
@@ -72,7 +72,7 @@ jobs:
     runs-on: ${{ matrix.os }}
 
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6
       - name: Install doxygen
         uses: ssciwr/doxygen-install@v1
         with:
@@ -103,7 +103,7 @@ jobs:
         subdir: [base]
     runs-on: ${{ matrix.os }}
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6
       - name: Create .bazelversion file
         working-directory: examples
         run: echo "${{ matrix.bazel }}" > .bazelversion
@@ -157,7 +157,7 @@ jobs:
         subdir: [base]
     runs-on: ${{ matrix.os }}
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6
       - name: Create .bazelversion file
         working-directory: examples
         run: echo "${{ matrix.bazel }}" > .bazelversion
@@ -225,7 +225,7 @@ jobs:
     runs-on: ${{ matrix.os }}
 
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6
       - name: Create .bazelversion file
         working-directory: examples
         run: echo "${{ matrix.bazel }}" > .bazelversion
@@ -241,3 +241,36 @@ jobs:
       - name: Check doxygen version in produced index.html
         run: grep "Doxygen $DEFAULT_DOXYGEN_VERSION" examples/submodules/${{ matrix.subdir }}/bazel-bin/html/index.html
         shell: bash
+
+  nested:
+    strategy:
+      matrix:
+        os: [ubuntu-latest, windows-latest, macos-latest]
+        bazel: [7.0.0, 8.0.0, rolling]
+    runs-on: ${{ matrix.os }}
+
+    steps:
+      - uses: actions/checkout@v6
+      - name: Create .bazelversion file
+        working-directory: examples
+        run: echo "${{ matrix.bazel }}" > .bazelversion
+        shell: bash
+      - name: Build nested
+        run: bazel build //nested:doxygen_a //nested:doxygen_b
+        working-directory: examples/nested
+      - name: Check output (a)
+        uses: andstor/file-existence-action@v3
+        with:
+          files: examples/bazel-bin/nested/a/html/index.html
+          fail: true
+      - name: Check output (b)
+        uses: andstor/file-existence-action@v3
+        with:
+          files: examples/bazel-bin/nested/b/html/index.html
+          fail: true
+      - name: Check doxygen version in produced index.html (a)
+        run: grep "Doxygen $DEFAULT_DOXYGEN_VERSION" examples/bazel-bin/nested/a/html/index.html
+        shell: bash
+      - name: Check doxygen version in produced index.html (b)
+        run: grep "Doxygen $DEFAULT_DOXYGEN_VERSION" examples/bazel-bin/nested/b/html/index.html
+        shell: bash

CHANGELOG.md

@@ -5,6 +5,12 @@ All notable changes to this project will be documented in this file.
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
+## [2.6.1]
+
+### Added
+
+- `doxyfile_prefix` parameter to optionally allow configuring the directory into which the `Doxyfile` is emitted [#35](https://github.com/TendTo/rules_doxygen/issues/35) (thanks to @renesas-abigail)
+
 ## [2.6.0]
 
 ### Changed

docs/doxygen_doc.md

@@ -28,11 +28,11 @@ A provider to collect source files transitively from the target and its dependen
 <pre>
 load("@doxygen//:doxygen.bzl", "doxygen")
 
-doxygen(<a href="#doxygen-name">name</a>, <a href="#doxygen-srcs">srcs</a>, <a href="#doxygen-deps">deps</a>, <a href="#doxygen-executable">executable</a>, <a href="#doxygen-dot_executable">dot_executable</a>, <a href="#doxygen-configurations">configurations</a>, <a href="#doxygen-doxyfile_template">doxyfile_template</a>,
-        <a href="#doxygen-doxygen_extra_args">doxygen_extra_args</a>, <a href="#doxygen-use_default_shell_env">use_default_shell_env</a>, <a href="#doxygen-env">env</a>, <a href="#doxygen-tools">tools</a>, <a href="#doxygen-outs">outs</a>, <a href="#doxygen-doxyfile_encoding">doxyfile_encoding</a>, <a href="#doxygen-project_name">project_name</a>,
-        <a href="#doxygen-project_number">project_number</a>, <a href="#doxygen-project_brief">project_brief</a>, <a href="#doxygen-project_logo">project_logo</a>, <a href="#doxygen-project_icon">project_icon</a>, <a href="#doxygen-create_subdirs">create_subdirs</a>,
-        <a href="#doxygen-create_subdirs_level">create_subdirs_level</a>, <a href="#doxygen-allow_unicode_names">allow_unicode_names</a>, <a href="#doxygen-output_language">output_language</a>, <a href="#doxygen-brief_member_desc">brief_member_desc</a>, <a href="#doxygen-repeat_brief">repeat_brief</a>,
-        <a href="#doxygen-abbreviate_brief">abbreviate_brief</a>, <a href="#doxygen-always_detailed_sec">always_detailed_sec</a>, <a href="#doxygen-inline_inherited_memb">inline_inherited_memb</a>, <a href="#doxygen-full_path_names">full_path_names</a>,
+doxygen(<a href="#doxygen-name">name</a>, <a href="#doxygen-srcs">srcs</a>, <a href="#doxygen-deps">deps</a>, <a href="#doxygen-executable">executable</a>, <a href="#doxygen-dot_executable">dot_executable</a>, <a href="#doxygen-configurations">configurations</a>, <a href="#doxygen-doxyfile_prefix">doxyfile_prefix</a>,
+        <a href="#doxygen-doxyfile_template">doxyfile_template</a>, <a href="#doxygen-doxygen_extra_args">doxygen_extra_args</a>, <a href="#doxygen-use_default_shell_env">use_default_shell_env</a>, <a href="#doxygen-env">env</a>, <a href="#doxygen-tools">tools</a>, <a href="#doxygen-outs">outs</a>,
+        <a href="#doxygen-doxyfile_encoding">doxyfile_encoding</a>, <a href="#doxygen-project_name">project_name</a>, <a href="#doxygen-project_number">project_number</a>, <a href="#doxygen-project_brief">project_brief</a>, <a href="#doxygen-project_logo">project_logo</a>, <a href="#doxygen-project_icon">project_icon</a>,
+        <a href="#doxygen-create_subdirs">create_subdirs</a>, <a href="#doxygen-create_subdirs_level">create_subdirs_level</a>, <a href="#doxygen-allow_unicode_names">allow_unicode_names</a>, <a href="#doxygen-output_language">output_language</a>, <a href="#doxygen-brief_member_desc">brief_member_desc</a>,
+        <a href="#doxygen-repeat_brief">repeat_brief</a>, <a href="#doxygen-abbreviate_brief">abbreviate_brief</a>, <a href="#doxygen-always_detailed_sec">always_detailed_sec</a>, <a href="#doxygen-inline_inherited_memb">inline_inherited_memb</a>, <a href="#doxygen-full_path_names">full_path_names</a>,
         <a href="#doxygen-strip_from_path">strip_from_path</a>, <a href="#doxygen-strip_from_inc_path">strip_from_inc_path</a>, <a href="#doxygen-short_names">short_names</a>, <a href="#doxygen-javadoc_autobrief">javadoc_autobrief</a>, <a href="#doxygen-javadoc_banner">javadoc_banner</a>,
         <a href="#doxygen-qt_autobrief">qt_autobrief</a>, <a href="#doxygen-multiline_cpp_is_brief">multiline_cpp_is_brief</a>, <a href="#doxygen-python_docstring">python_docstring</a>, <a href="#doxygen-inherit_docs">inherit_docs</a>, <a href="#doxygen-separate_member_pages">separate_member_pages</a>,
         <a href="#doxygen-tab_size">tab_size</a>, <a href="#doxygen-aliases">aliases</a>, <a href="#doxygen-optimize_output_for_c">optimize_output_for_c</a>, <a href="#doxygen-optimize_output_java">optimize_output_java</a>, <a href="#doxygen-optimize_for_fortran">optimize_for_fortran</a>,
@@ -270,6 +270,7 @@ doxygen(
 | <a id="doxygen-executable"></a>executable |  Label of the doxygen executable.   |  `None` |
 | <a id="doxygen-dot_executable"></a>dot_executable |  Label of the doxygen executable. Make sure it is also added to the `srcs` of the macro   |  `None` |
 | <a id="doxygen-configurations"></a>configurations |  List of additional configuration parameters to pass to Doxygen.   |  `None` |
+| <a id="doxygen-doxyfile_prefix"></a>doxyfile_prefix |  Prefix to add to the Doxyfile path.   |  `""` |
 | <a id="doxygen-doxyfile_template"></a>doxyfile_template |  The template file to use to generate the Doxyfile. The following substitutions are available:<br> - `# {{INPUT}}`: Subpackage directory in the sandbox.<br> - `# {{ADDITIONAL PARAMETERS}}`: Additional parameters given in the `configurations` attribute.<br> - `# {{OUTPUT DIRECTORY}}`: The directory provided in the `outs` attribute.<br> - `{{OUTDIR}}`: The output directory where the generated documentation will be placed.     Can be used anywhere in the Doxyfile, usually to generate additional output files, like tag files.   |  `None` |
 | <a id="doxygen-doxygen_extra_args"></a>doxygen_extra_args |  Extra arguments to pass to the doxygen executable.   |  `[]` |
 | <a id="doxygen-use_default_shell_env"></a>use_default_shell_env |  Whether to use the default shell environment when running doxygen.   |  `False` |

doxygen/doxygen.bzl

@@ -55,7 +55,8 @@ collect_files_aspect = aspect(
 )
 
 def _doxygen_impl(ctx):
-    doxyfile = ctx.actions.declare_file("Doxyfile")
+    doxyfile_prefix = ctx.attr.doxyfile_prefix
+    doxyfile = ctx.actions.declare_file("%s/Doxyfile" % doxyfile_prefix if doxyfile_prefix else "Doxyfile")
 
     output_group_info = {}
     outs = []
@@ -143,6 +144,7 @@ doxygen(
         "deps": attr.label_list(aspects = [collect_files_aspect], doc = "List of dependencies targets whose files present in the 'src', 'hdrs' and 'data' attributes will be collected to generate the documentation. Transitive dependencies are also taken into account. Since we are only considering the source files and not the outputs, these targets **will not** be built"),
         "configurations": attr.string_list(doc = "Additional configuration parameters to append to the Doxyfile. For example, to set the project name, use `PROJECT_NAME = example`."),
         "outs": attr.string_list(default = ["html"], allow_empty = False, doc = """Output folders to keep. If only the html outputs is of interest, the default value will do. Otherwise, a list of folders to keep is expected (e.g. `["html", "latex"]`)."""),
+        "doxyfile_prefix" : attr.string(doc = "Prefix to add to the Doxyfile path.", default= ""),
         "doxyfile_template": attr.label(
             allow_single_file = True,
             default = Label(":Doxyfile.template"),
@@ -207,6 +209,7 @@ def doxygen(
         executable = None,
         dot_executable = None,
         configurations = None,
+        doxyfile_prefix = "",
         doxyfile_template = None,
         doxygen_extra_args = [],
         use_default_shell_env = False,
@@ -697,6 +700,7 @@ def doxygen(
         executable: Label of the doxygen executable.
         dot_executable: Label of the doxygen executable. Make sure it is also added to the `srcs` of the macro
         configurations: List of additional configuration parameters to pass to Doxygen.
+        doxyfile_prefix: Prefix to add to the Doxyfile path.
         doxyfile_template: The template file to use to generate the Doxyfile.
             The following substitutions are available:<br>
             - `# {{INPUT}}`: Subpackage directory in the sandbox.<br>
@@ -1342,6 +1346,7 @@ def doxygen(
         srcs = srcs,
         deps = deps,
         outs = outs,
+        doxyfile_prefix = doxyfile_prefix,
         configurations = configurations,
         doxygen_extra_args = doxygen_extra_args,
         executable = executable,

examples/nested/BUILD.bazel

@@ -16,3 +16,32 @@ doxygen(
     project_brief = "Example project for doxygen",
     project_name = "nested",
 )
+
+doxygen(
+    name = "doxygen_a",
+    srcs = ["//nested/lib_a:sources"],
+    outs = [
+        "a/html",
+        "a/tags",
+    ],
+    doxyfile_prefix = "a",
+    project_brief = "Example project for doxygen, library A",
+    project_name = "nested",
+    generate_tagfile = "$(OUTDIR)/tags/tagfile.xml",
+)
+
+doxygen(
+    name = "doxygen_b",
+        srcs = glob([
+        "lib_b/*.h",
+        "lib_b/*.cpp",
+    ]),
+    outs = [
+        "b/html",
+        "b/tags",
+    ],
+    doxyfile_prefix = "b",
+    project_brief = "Example project for doxygen, library B",
+    project_name = "nested",
+    generate_tagfile = "$(OUTDIR)/tags/tagfile.xml",
+)

examples/nested/README.md

@@ -77,3 +77,41 @@ doxygen(
     project_name = "nested",
 )
 ```
+
+## Handling multiple doxygen rules in the same folder
+
+Having multiple `doxygen` rules in the same folder is supported, but requires some extra configuration.
+By default, all rules would create a `Doxyfile` in the same location, causing a conflict.
+The same applies to the output `html` folder.  
+To avoid this, remember to specify different `doxyfile_prefix` and `outs` for each rule:
+
+```bzl
+doxygen(
+    name = "doxygen_a",
+    srcs = ["//nested/lib_a:sources"],
+    outs = [
+        "a/html",
+        "a/tags",
+    ],
+    doxyfile_prefix = "a",
+    project_brief = "Example project for doxygen, library A",
+    project_name = "nested",
+    generate_tagfile = "$(OUTDIR)/tags/tagfile.xml",
+)
+
+doxygen(
+    name = "doxygen_b",
+        srcs = glob([
+        "lib_b/*.h",
+        "lib_b/*.cpp",
+    ]),
+    outs = [
+        "b/html",
+        "b/tags",
+    ],
+    doxyfile_prefix = "b",
+    project_brief = "Example project for doxygen, library B",
+    project_name = "nested",
+    generate_tagfile = "$(OUTDIR)/tags/tagfile.xml",
+)
+```