Update docs content and process

.github/workflows/docs.yml

@@ -14,44 +14,14 @@ permissions:
   contents: read
 
 jobs:
-  build:
-    name: Build docs
-    runs-on: ${{ github.repository_owner == 'oneapi-src' && 'intel-ubuntu-22.04' || 'ubuntu-latest' }}
-
-    steps:
-    - name: Checkout repository
-      uses: actions/checkout@b4ffde65f46336ab88eb53be808477a3936bae11 # v4.1.1
-      with:
-        fetch-depth: 0
-
-    - name: Install doxygen
-      run: |
-        sudo apt-get update
-        sudo apt-get install -y doxygen
-
-    # Latest distros do not allow global pip installation
-    - name: Install Python requirements in venv
-      run: |
-        python3 -m venv .venv
-        . .venv/bin/activate
-        echo "$PATH" >> $GITHUB_PATH
-        python3 -m pip install -r third_party/requirements.txt
-
-    - name: Setup PATH for python
-      run: echo "$HOME/.local/bin" >> $GITHUB_PATH
-
-    - name: Build the documentation
-      working-directory: scripts
-      run: python3 generate_docs.py
-
-    - name: Upload artifact
-      uses: actions/upload-pages-artifact@0252fc4ba7626f0298f0cf00902a25c6afc77fa8 # v3.0.0
-      with:
-        path: docs/html
+  DocsBuild:
+    uses: ./.github/workflows/reusable_docs_build.yml
+    with:
+      upload: true
 
-  deploy:
+  DocsDeploy:
     name: Deploy docs to GitHub Pages
-    needs: build
+    needs: DocsBuild
 
     permissions:
       pages: write

.github/workflows/reusable_docs_build.yml

@@ -1,6 +1,12 @@
 name: Docs build
 
-on: workflow_call
+on:
+  workflow_call:
+    inputs:
+      upload:
+        description: Should HTML documentation be uploaded as artifact?
+        type: boolean
+        default: false
 
 permissions:
   contents: read
@@ -30,5 +36,17 @@ jobs:
         python3 -m pip install -r third_party/requirements.txt
 
     - name: Build the documentation
-      working-directory: scripts
-      run: python3 generate_docs.py
+      run: |
+        cmake -B build \
+          -DUMF_BUILD_LEVEL_ZERO_PROVIDER=OFF \
+          -DUMF_BUILD_CUDA_PROVIDER=OFF \
+          -DUMF_BUILD_TESTS=OFF \
+          -DUMF_BUILD_EXAMPLES=OFF \
+          -DUMF_DISABLE_HWLOC=ON
+        cmake --build build --target docs
+
+    - name: Upload artifact
+      if: ${{ inputs.upload == true }}
+      uses: actions/upload-pages-artifact@0252fc4ba7626f0298f0cf00902a25c6afc77fa8 # v3.0.0
+      with:
+        path: build/docs_build/generated/html

.gitignore

@@ -58,7 +58,7 @@ __pycache__/
 *.py[cod]
 
 # Generated docs
-docs/
+docs_build/
 
 # Build files
 /build*/

CMakeLists.txt

@@ -760,6 +760,17 @@ if(UMF_FORMAT_CODE_STYLE)
     endif()
 endif()
 
+find_package(Python3 3.8)
+if(Python3_FOUND)
+    message(STATUS "Adding 'docs' target for creating a documentation.")
+    add_custom_target(
+        docs
+        WORKING_DIRECTORY ${CMAKE_BINARY_DIR}
+        COMMAND ${Python3_EXECUTABLE}
+                ${UMF_CMAKE_SOURCE_DIR}/docs/generate_docs.py
+        COMMENT "Generate HTML documentation using Doxygen")
+endif()
+
 # --------------------------------------------------------------------------- #
 # Configure make install/uninstall and packages
 # --------------------------------------------------------------------------- #

README.md

@@ -122,11 +122,16 @@ List of options provided by CMake:
 
 ## Architecture: memory pools and providers
 
-A UMF memory pool is a combination of a pool allocator and a memory provider. A memory provider is responsible for coarse-grained memory allocations and management of memory pages, while the pool allocator controls memory pooling and handles fine-grained memory allocations.
+A UMF memory pool is a combination of a pool allocator and a memory provider. A memory provider is responsible for
+coarse-grained memory allocations and management of memory pages, while the pool allocator controls memory pooling
+and handles fine-grained memory allocations.
 
 Pool allocator can leverage existing allocators (e.g. jemalloc or tbbmalloc) or be written from scratch.
 
-UMF comes with predefined pool allocators (see include/pool) and providers (see include/provider). UMF can also work with user-defined pools and providers that implement a specific interface (see include/umf/memory_pool_ops.h and include/umf/memory_provider_ops.h).
+UMF comes with predefined pool allocators (see [`include/umf/pools`](include/umf/pools)) and providers
+(see [`include/umf/providers`](include/umf/providers)). UMF can also work with user-defined pools and
+providers that implement a specific interface (see [`include/umf/memory_pool_ops.h`](include/umf/memory_pool_ops.h)
+and [`include/umf/memory_provider_ops.h`](include/umf/memory_provider_ops.h)).
 
 More detailed documentation is available here: https://oneapi-src.github.io/unified-memory-framework/
 
@@ -152,6 +157,7 @@ a duplicate of another process's file descriptor (`pidfd_getfd(2)` is supported
 Permission to duplicate another process's file descriptor is governed by a ptrace access mode
 `PTRACE_MODE_ATTACH_REALCREDS` check (see `ptrace(2)`) that can be changed using
 the `/proc/sys/kernel/yama/ptrace_scope` interface in the following way:
+
 ```sh
 $ sudo bash -c "echo 0 > /proc/sys/kernel/yama/ptrace_scope"
 ```
@@ -183,6 +189,7 @@ a duplicate of another process's file descriptor (`pidfd_getfd(2)` is supported
 Permission to duplicate another process's file descriptor is governed by a ptrace access mode
 `PTRACE_MODE_ATTACH_REALCREDS` check (see `ptrace(2)`) that can be changed using
 the `/proc/sys/kernel/yama/ptrace_scope` interface in the following way:
+
 ```sh
 $ sudo bash -c "echo 0 > /proc/sys/kernel/yama/ptrace_scope"
 ```
@@ -203,7 +210,7 @@ Additionally, required for tests:
 
 #### DevDax memory provider (Linux only)
 
-A memory provider that provides memory from a device DAX (a character device file /dev/daxX.Y).
+A memory provider that provides memory from a device DAX (a character device file like `/dev/daxX.Y`).
 It can be used when large memory mappings are needed.
 
 ##### Requirements
@@ -249,8 +256,6 @@ This memory pool is distributed as part of libumf. It forwards all requests to t
 memory provider. Currently umfPoolRealloc, umfPoolCalloc and umfPoolMallocUsableSize functions
 are not supported by the proxy pool.
 
-To enable this feature, the `UMF_BUILD_SHARED_LIBRARY` option needs to be turned `ON`.
-
 #### Disjoint pool
 
 TODO: Add a description
@@ -326,6 +331,8 @@ Querying the latency value requires HMAT support on the platform. Calling `umfMe
 UMF provides the UMF proxy library (`umf_proxy`) that makes it possible
 to override the default allocator in other programs in both Linux and Windows.
 
+To enable this feature, the `UMF_BUILD_SHARED_LIBRARY` option needs to be turned `ON`.
+
 #### Linux
 
 In case of Linux it can be done without any code changes using the `LD_PRELOAD` environment variable:

RELEASE_STEPS.md

@@ -41,7 +41,7 @@ Do changes for a release:
   - For major releases mention API and ABI compatibility with the previous release
 - Update project's version in a few places:
   - For major and minor releases: `UMF_VERSION_CURRENT` in `include/umf/base.h` (the API version)
-  - `release` variable in `scripts/docs_config/conf.py` (for docs)
+  - `release` variable in `docs/config/conf.py` (for docs)
   - `UMF_VERSION` variable in `.github/workflows/reusable_basic.yml` (for installation test)
 - For major releases update ABI version in `.map` and `.def` files
   - These files are defined for all public libraries (`libumf` and `proxy_lib`, at the moment)

docs/README.md

@@ -0,0 +1,24 @@
+# Documentation
+
+To generate HTML documentation run the `generate_docs.py` script from any sub-dir of the
+repository (most likely `build`) or enable and use build target 'docs' (see details below).
+
+This script will create `./docs_build` sub-directory, where the intermediate and final files
+will be created. HTML docs will be in the `./docs_build/generated/html` directory.
+
+## make docs
+
+To run documentation generation via build target use CMake commands below.
+To enable this target, python executable (in required version) has to be found in the system.
+
+```bash
+$ cmake -B build
+$ cmake --build build --target docs
+```
+
+## Requirements
+
+Script to generate HTML docs requires:
+ * [Doxygen](http://www.doxygen.nl/) at least v1.9.1
+ * [Python](https://www.python.org/downloads/) at least v3.8
+ * and python pip requirements, as defined in `third_party/requirements.txt`

scripts/docs_config/Doxyfile → docs/config/Doxyfile

@@ -2058,7 +2058,7 @@ GENERATE_XML           = YES
 # The default directory is: xml.
 # This tag requires that the tag GENERATE_XML is set to YES.
 
-XML_OUTPUT             = ../docs/xml
+XML_OUTPUT             = docs_build/doxyxml
 
 # If the XML_PROGRAMLISTING tag is set to YES, doxygen will dump the program
 # listings (including syntax highlighting and cross-referencing information) to

scripts/docs_config/api.rst → docs/config/api.rst

@@ -58,6 +58,9 @@ supported by the Proxy Pool.
 
 Scalable Pool
 ------------------------------------------
+
+A oneTBB-based memory pool manager.
+
 .. doxygenfile:: pool_scalable.h
     :sections: define enum typedef func var
 
@@ -104,10 +107,18 @@ A memory provider that provides memory from L0 device.
 .. doxygenfile:: provider_level_zero.h
     :sections: define enum typedef func var
 
+CUDA Provider
+------------------------------------------
+
+A memory provider that provides memory from CUDA device.
+
+.. doxygenfile:: provider_cuda.h
+    :sections: define enum typedef func var
+
 DevDax Memory Provider
 ------------------------------------------
 
-A memory provider that provides memory from a device DAX (a character device file /dev/daxX.Y).
+A memory provider that provides memory from a device DAX (a character device file like /dev/daxX.Y).
 
 .. doxygenfile:: provider_devdax_memory.h
     :sections: define enum typedef func var

scripts/docs_config/conf.py → docs/config/conf.py

@@ -49,7 +49,9 @@
 # -- Extension configuration -------------------------------------------------
 
 # -- Options for breathe extension -------------------------------------------
-breathe_projects = {project: "../../docs/xml"}
+# 'doxyxml' dir is generated with Doxygen; it's supposed to be in a directory
+# one above the config directory.
+breathe_projects = {project: "../doxyxml"}
 breathe_default_project = project
 breathe_show_include = False
 breathe_default_members = ("members", "undoc-members")

scripts/generate_docs.py → docs/generate_docs.py

@@ -6,17 +6,20 @@
 """
 
 from pathlib import Path
-from shutil import rmtree
+from shutil import rmtree, copytree
 import subprocess  # nosec B404
 import time
 
 
 def _check_cwd() -> None:
-    script_path = Path(__file__).resolve().parent
     cwd = Path.cwd()
-    if script_path != cwd:
+    include_dir = Path(cwd, "../include")
+    # Verify if include dir is one level up (as defined in Doxyfile)
+    if not include_dir.exists():
         print(
-            f"{__file__} script has to be run from the 'scripts' directory. Terminating..."
+            f"Include directory {include_dir.resolve()} not found! "
+            "Please run this script from <repo_root_dir>/build!",
+            flush=True,
         )
         exit(1)
 
@@ -66,8 +69,17 @@ def _generate_html(config_path: Path, docs_path: Path) -> None:
 
 def main() -> None:
     _check_cwd()
-    config_path = Path("docs_config").resolve()
-    docs_path = Path("..", "docs").resolve()
+
+    script_dir = Path(__file__).resolve().parent
+    docs_build_path = Path("docs_build").resolve()
+
+    # Sphinx and breathe require access to a Doxygen generated dir ('doxyxml')
+    # so we copy the whole content of the 'docs' dir to the build dir.
+    copytree(Path(script_dir), docs_build_path, dirs_exist_ok=True)
+
+    config_path = Path(docs_build_path, "config").resolve()
+    docs_path = Path(docs_build_path, "generated").resolve()
+
     start = time.time()
     _prepare_docs_dir(docs_path)
     _generate_xml(config_path, docs_path)