Memray open source bootstrap

This commit prepares tha package for its release as Open Source. The
commit squashes the history associated with internal development,
striping any sensitive information as well as removing references to
"Bloomberg" and Bloomberg-specific configuration files.

This commit also adds:

* GitHub specific CI files to use GitHub actions.
* LICENSE files.
* A vanilla DockerFile.
* A vendored, patched version of libbacktrace checked in the source.
* OS-friendly documentation

.clang-format

@@ -0,0 +1,97 @@
+BasedOnStyle: LLVM
+Language: Cpp
+AccessModifierOffset: -2
+AlignAfterOpenBracket: AlwaysBreak
+AlignConsecutiveAssignments: false
+AlignConsecutiveDeclarations: false
+AlignEscapedNewlines: Right
+AlignOperands: true
+AlignTrailingComments: false
+AllowAllArgumentsOnNextLine: false
+AllowAllParametersOfDeclarationOnNextLine: false
+AllowShortBlocksOnASingleLine: false
+AllowShortCaseLabelsOnASingleLine: false
+AllowShortFunctionsOnASingleLine: None
+AllowShortIfStatementsOnASingleLine: WithoutElse
+AllowShortLoopsOnASingleLine: false
+AlwaysBreakAfterReturnType: TopLevel
+AlwaysBreakBeforeMultilineStrings: false
+AlwaysBreakTemplateDeclarations: Yes
+BinPackArguments: false
+BinPackParameters: false
+BraceWrapping:
+  AfterClass: true
+  AfterControlStatement: MultiLine
+  AfterEnum: false
+  AfterFunction: true
+  AfterNamespace: false
+  AfterStruct: true
+  AfterUnion: false
+  AfterExternBlock: false
+  BeforeCatch: false
+  BeforeElse: false
+  IndentBraces: false
+  SplitEmptyFunction: true
+  SplitEmptyRecord: true
+  SplitEmptyNamespace: true
+BreakBeforeBinaryOperators: NonAssignment
+BreakBeforeBraces: Custom
+BreakBeforeInheritanceComma: false
+BreakBeforeTernaryOperators: true
+BreakConstructorInitializers: BeforeComma
+BreakInheritanceList: BeforeComma
+BreakStringLiterals: true
+ColumnLimit:     105
+CompactNamespaces: false
+ConstructorInitializerAllOnOneLineOrOnePerLine: false
+ConstructorInitializerIndentWidth: 0
+ContinuationIndentWidth: 8
+Cpp11BracedListStyle: true
+DerivePointerAlignment: false
+FixNamespaceComments: true
+IncludeBlocks:   Preserve
+IncludeCategories:
+  - Regex:           '^"(llvm|llvm-c|clang|clang-c)/'
+    Priority:        2
+  - Regex:           '^(<|"(gtest|gmock|isl|json)/)'
+    Priority:        3
+  - Regex:           '.*'
+    Priority:        1
+IndentCaseLabels: true
+IndentGotoLabels: false
+IndentPPDirectives: AfterHash
+IndentWidth: 4
+IndentWrappedFunctionNames: false
+KeepEmptyLinesAtTheStartOfBlocks: false
+MaxEmptyLinesToKeep: 1
+NamespaceIndentation: None
+PenaltyBreakAssignment: 2
+PenaltyBreakBeforeFirstCallParameter: 19
+PenaltyBreakComment: 300
+PenaltyBreakFirstLessLess: 120
+PenaltyBreakString: 1000
+PenaltyBreakTemplateDeclaration: 10
+PenaltyExcessCharacter: 1000000
+PenaltyReturnTypeOnItsOwnLine: 60
+PointerAlignment: Left
+ReflowComments: true
+SortIncludes: true
+SortUsingDeclarations: true
+SpaceAfterCStyleCast: false
+SpaceAfterTemplateKeyword: false
+SpaceBeforeAssignmentOperators: true
+SpaceBeforeCpp11BracedList: false
+SpaceBeforeCtorInitializerColon: true
+SpaceBeforeInheritanceColon: true
+SpaceBeforeParens: ControlStatements
+SpaceBeforeRangeBasedForLoopColon: true
+SpaceInEmptyParentheses: false
+SpacesBeforeTrailingComments: 2
+SpacesInAngles:  false
+SpacesInContainerLiterals: true
+SpacesInCStyleCastParentheses: false
+SpacesInParentheses: false
+SpacesInSquareBrackets: false
+Standard: Auto
+TabWidth: 8
+UseTab: Never

.github/ISSUE_TEMPLATE/---bug-report.md

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+---
+name: "\U0001F41B Bug Report"
+about: "If something isn't working as expected \U0001F914."
+---
+
+## Bug Report
+
+**Current Behavior** A clear and concise description of the behavior.
+
+**Input Code**
+
+- REPL or Repo link if applicable:
+
+```python
+your_code = "here"
+```
+
+**Expected behavior/code** A clear and concise description of what you expected to happen (or
+code).
+
+**Environment**
+
+- Python(s): [e.g. python3.8, python3.9, ...]
+
+**Possible Solution**
+
+<!--- Only if you have suggestions on a fix for the bug -->
+
+**Additional context/Screenshots** Add any other context about the problem here. If applicable, add
+screenshots to help explain.

.github/ISSUE_TEMPLATE/---feature-request.md

@@ -0,0 +1,18 @@
+---
+name: "\U0001F680 Feature Request"
+about: Suggest an idea for this project
+---
+
+## Feature Request
+
+**Is your feature request related to a problem? Please describe.** A clear and concise description
+of what the problem is. Ex. I have an issue when [...]
+
+**Describe the solution you'd like** A clear and concise description of what you want to happen.
+Add any considered drawbacks.
+
+**Describe alternatives you've considered** A clear and concise description of any alternative
+solutions or features you've considered.
+
+**Teachability, Documentation, Adoption, Migration Strategy** If you can, explain how users will be
+able to use this and possibly write out a version the docs. Maybe a screenshot or design?

.github/workflows/build.yml

@@ -0,0 +1,81 @@
+name: Tests
+
+on:
+  push:
+    branches:
+      - main
+  pull_request:
+    branches:
+      - main
+
+jobs:
+  test:
+    runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        python-version: ['3.10', '3.9', '3.8']
+    steps:
+    - uses: actions/checkout@v2
+    - name: Set up Python ${{ matrix.python-version }}
+      uses: actions/setup-python@v2
+      with:
+        python-version: ${{ matrix.python-version }}
+    - name: Set up dependencies
+      run: |
+        sudo apt-get update
+        sudo apt-get install -qy libunwind-dev pkg-config nodejs npm
+    - name: Install Python dependencies
+      run: |
+        python3 -m pip install --upgrade pip
+        python3 -m pip install tox tox-gh-actions
+    - name: Run tox
+      run: tox . -vvv
+
+  lint_and_docs:
+    runs-on: ubuntu-latest
+    steps:
+    - uses: actions/checkout@v2
+    - name: Set up Python
+      uses: actions/setup-python@v2
+      with:
+        python-version: '3.10'
+    - name: Set up dependencies
+      run: |
+        sudo apt-get update
+        sudo apt-get install -qy clang-format nodejs npm libunwind-dev pkg-config
+        npm install -g prettier
+    - name: Install Python dependencies
+      run: |
+        python3 -m pip install -r requirements-extra.txt
+    - name: Install Package
+      run: |
+        python3 -m pip install -e .
+    - name: Lint sources
+      run: |
+        make lint
+    - name: Build docs
+      run: |
+        make docs
+
+  valgrind:
+    runs-on: ubuntu-latest
+    steps:
+    - uses: actions/checkout@v2
+    - name: Set up Python 3.10
+      uses: actions/setup-python@v2
+      with:
+        python-version: "3.10"
+    - name: Set up dependencies
+      run: |
+        sudo apt-get update
+        sudo apt-get install -qy libunwind-dev pkg-config nodejs npm valgrind
+    - name: Install Python dependencies and package
+      run: |
+        python3 -m pip install --upgrade pip
+        python3 -m pip install -r requirements-test.txt
+        python3 -m pip install -e .
+    - name: Run Valgrind
+      run: make valgrind
+    - name: Run Helgrind
+      run: make helgrind
+

CONTRIBUTING.md

@@ -0,0 +1,68 @@
+# Contributing
+
+Before contributing to this repository, first please discuss the change you wish to make via an
+issue, or any other method of communication with the maintainers of this repository.
+
+You can also search this project for issues with the following labels:
+
+| Label                                                                                                                                     | Search Term                               | Description                                                                                                                                                        |
+| ----------------------------------------------------------------------------------------------------------------------------------------- | ----------------------------------------- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------ |
+| [good-first-issue](https://github.com/bloomberg/memray/search?q=is%3Aissue+is%3Aopen+label%3Agood-first-issue&type=Issues&utf8=%E2%9C%93) | `is:issue is:open label:good-first-issue` | Recommended for first-time contributors! These are well-defined, and allow a user to get familiar with the project's workflow before tackling more complex issues. |
+| [help wanted](https://github.com/bloomberg/memray/search?q=is%3Aissue+is%3Aopen+label%3A%22help+wanted%22+&type=Issues&utf8=%E2%9C%93)    | `is:issue is:open label:"help wanted"`    | General issues where contributors help is wanted.                                                                                                                  |
+| [question](https://github.com/bloomberg/memray/search?q=is%3Aissue+is%3Aopen+label%3Aquestion&type=Issues&utf8=%E2%9C%93)                 | `is:issue is:open label:question`         | Open discussions to resolve everything from implementation details to desired functionality.                                                                       |
+
+## Documentation
+
+**Public** modules, functions, classes, and methods must be documented using [Python
+docstrings][pep 257]. **Non-public** functions and methods must also be documented for defining the
+API contract. In addition to being useful for generating documentation, docstrings add clarity when
+looking through the source code or using the [built-in help][builtin-help] system, and can be
+leveraged in autocompletion by IDEs.
+
+Please see [PEP 257][] for details on semantics and conventions associated with Python docstrings.
+
+### Docstring style
+
+Docstrings must follow [Google style docstrings][google-style]. This docstring style is more
+pleasant to read when browsing the source.
+
+## Type hints
+
+All functions and methods should be type annotated. This allows for static analysis and more
+intelligent code completion from tools & IDEs.
+
+Type annotations must use [type comment](#py27-type-comment) annotations until 2.7 support is
+completely phased out. Please see [PEP 484][] for details on definitions and tools surrounding type
+annotations.
+
+## Tests
+
+Changes should always include tests. If this is a bug fix it is a good idea to add the tests as the
+first commit of the pull request and the changes to fix the issue in subsequent commits to make it
+easier to validate it.
+
+## Pull requests
+
+### PRs should be linked to a GitHub issue
+
+Before opening a pull request to this repository, first please make sure there is a GitHub issue
+where your change has been discussed with the maintainers. Mention the issue number in your pull
+request description using one of the
+[supported keywords](https://help.github.com/articles/closing-issues-using-keywords/). For example,
+adding `Closes: #100` in the pull request description will link the PR with the issue and GitHub
+will automatically close the issue upon merging it.
+
+Do not include the issue reference in your commit messages however, add it only in the description
+of the PR.
+
+<!-- LINKS -->
+
+[pep 257]: https://www.python.org/dev/peps/pep-0257/ "Docstring Conventions"
+[pep 484]: https://www.python.org/dev/peps/pep-0484/ "Type Hints"
+[google-style]: https://sphinxcontrib-napoleon.readthedocs.io/en/latest/example_google.html "Example Google Style Python Docstrings"
+[py27-type-comment]: https://www.python.org/dev/peps/pep-0484/#suggested-syntax-for-python-2-7-and-straddling-code "Suggested syntax for Python 2.7 and straddling code"
+[builtin-help]: https://docs.python.org/3/library/functions.html#help
+
+<!--
+vim: tw=99:spell
+-->

Dockerfile

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+FROM debian:latest
+
+RUN apt-get update \
+    && apt-get install -y --force-yes --no-install-recommends \
+    build-essential \
+    libunwind-dev \
+    pkg-config \
+    python3-dev \
+    python3-dbg \
+    python3-pip \
+    python3-venv \
+    make \
+    cmake \
+    gdb \
+    valgrind \
+    lcov \
+    nodejs \
+    npm \
+    clang-format \
+    git \
+    ccache \
+    wget \
+    && apt-get clean \
+    && rm -rf /var/lib/apt/lists/*
+
+ENV PYTHON=/venv/bin/python \
+    VIRTUAL_ENV=/venv \
+    PYTHONDONTWRITEBYTECODE=1 \
+    PATH=/bin:$PATH \
+    CC=gcc \
+    CXX=g++
+
+RUN python3.9 -m venv /venv
+
+ENV PATH="$VIRTUAL_ENV/bin:$PATH"
+
+COPY requirements-test.txt requirements-extra.txt requirements-docs.txt /tmp/
+
+RUN $PYTHON -m pip install -U \
+    -r /tmp/requirements-extra.txt \
+    -r /tmp/requirements-test.txt \
+    -r /tmp/requirements-docs.txt \
+    cython \
+    setuptools \
+    wheel
+
+RUN npm install -g prettier
+
+RUN ln -s /usr/bin/ccache /bin/g++ \
+    && ln -s /usr/bin/ccache /bin/gcc
+
+WORKDIR /src