Squashed 'src/libsass/' content from commit 39e3087

git-subtree-dir: src/libsass
git-subtree-split: 39e3087

.editorconfig

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+# This file is for unifying the coding style for different editors and IDEs
+# editorconfig.org
+
+root = true
+
+[*]
+charset = utf-8
+trim_trailing_whitespace = true
+insert_final_newline = true
+indent_style = space
+indent_size = 2
+
+[{Makefile, GNUmakefile.am}]
+indent_style = tab
+indent_size = 4

.gitattributes

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+# Auto detect text files and perform LF normalization
+* text=auto

.github/CONTRIBUTING.md

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+# Contributing to LibSass
+
+:+1::tada: First off, thanks for taking the time to contribute! :tada::+1:
+
+The following is a set of guidelines for contributing to LibSass, which is hosted in the [Sass Organization](https://github.com/sass) on GitHub.
+These are just guidelines, not rules, use your best judgment and feel free to propose changes to this document in a pull request.
+
+LibSass is a library that implements a [sass language][8] compiler. As such it does not directly interface with end users (frontend developers).
+For direct contributions to the LibSass code base you will need to have at least a rough idea of C++, we will not lie about that.
+But there are other ways to contribute to the progress of LibSass. All contributions are done via github pull requests.
+
+You can also contribute to the LibSass [documentation][9] or provide additional [spec tests][10] (and we will gladly point you in the
+direction for corners that lack test coverage). Foremost we rely on good and concise bug reports for issues the spec tests do not yet catch.
+
+## Precheck: My Sass isn't compiling
+- [ ] Check if you can reproduce the issue via [SourceMap Inspector][5] (updated regularly).
+- [ ] Validate official ruby sass compiler via [SassMeister][6] produces your expected result.
+- [ ] Search for similar issue in [LibSass][1] and [node-sass][2] (include closed tickets)
+- [ ] Optionally test your code directly with [sass][7] or [sassc][3] ([installer][4])
+
+## Precheck: My build/install fails
+- [ ] Problems with building or installing libsass should be directed to implementors first!
+- [ ] Except for issues directly verified via sassc or LibSass own build (make/autotools9
+
+## Craft a meaningfull error report
+- [ ] Include the version of libsass and the implementor (i.e. node-sass or sassc)
+- [ ] Include information about your operating system and environment (i.e. io.js)
+- [ ] Either create a self contained sample that shows your issue ...
+- [ ] ... or provide it as a fetchable (github preferred) archive/repo
+- [ ] ... and include a step by step list of command to get all dependencies
+- [ ] Make it clear if you use indented or/and scss syntax
+
+## My error is hiding in a big code base
+1. we do not have time to support your code base!
+2. to fix occuring issues we need precise bug reports
+3. the more precise you are, the faster we can help you
+4. lazy reports get overlooked even when exposing serious bugs
+5. it's not hard to do, it only takes time
+- [ ] Make sure you saved the current state (i.e. commit to git)
+- [ ] Start by uncommenting blocks in the initial source file
+- [ ] Check if the problem is still there after each edit
+- [ ] Repeat until the problem goes away
+- [ ] Inline imported files as you go along
+- [ ] Finished once you cannot remove more
+- [ ] The emphasis is on the word "repeat" ...
+
+## What makes a code test case
+
+Important is that someone else can get the test case up and running to reproduce it locally. For this
+we urge you to verify that your sample yields the expected result by testing it via [SassMeister][6]
+or directly via ruby sass or node-sass (or any other libsass implementor) before submitting your bug
+report. Once you verified all of the above, you may use the template below to file your bug report.
+
+
+[1]: https://github.com/sass/libsass/issues?utf8=%E2%9C%93&q=is%3Aissue
+[2]: https://github.com/sass/node-sass/issues?utf8=%E2%9C%93&q=is%3Aissue
+[3]: https://github.com/sass/sassc
+[4]: http://libsass.ocbnet.ch/installer/
+[5]: http://libsass.ocbnet.ch/srcmap/
+[6]: http://www.sassmeister.com/
+[7]: https://rubygems.org/gems/sass
+
+[8]: http://sass-lang.com/
+[9]: https://github.com/sass/libsass/tree/master/docs
+[10]: https://github.com/sass/sass-spec

.github/ISSUE_TEMPLATE.md

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+[todo]: # (Title: Be as meaningful as possible)
+[todo]: # (Title: Try to use 60 or less chars)
+
+[todo]: # (This is only a template!)
+[todo]: # (remove unneeded bits)
+[todo]: # (use github preview!)
+
+## input.scss
+
+[todo]: # (always test and report with scss syntax)
+[todo]: # (use sass only when results differ from scss)
+
+```scss
+test {
+  content: bar
+}
+```
+
+## Actual results
+
+[todo]: # (update version info!)
+
+[libsass 3.X.y][1]
+```css
+test {
+  content: bar; }
+```
+
+## Expected result
+
+[todo]: # (update version info!)
+
+ruby sass 3.X.y
+```css
+test {
+  content: bar; }
+```
+
+[todo]: # (update version info!)
+[todo]: # (example for node-sass!)
+
+version info:
+```cmd
+$ node-sass --version
+node-sass       3.X.y   (Wrapper)       [JavaScript]
+libsass         3.X.y   (Sass Compiler) [C/C++]
+```
+
+[todo]: # (Go to http://libsass.ocbnet.ch/srcmap)
+[todo]: # (Enter your SCSS code and hit compile)
+[todo]: # (Click `bookmark` and replace the url)
+[todo]: # (link is used in actual results above)
+
+[1]: http://libsass.ocbnet.ch/srcmap/#dGVzdCB7CiAgY29udGVudDogYmFyOyB9Cg==

.gitignore

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+# Miscellaneous stuff
+
+/sassc
+/sass-spec
+
+VERSION
+.DS_Store
+.sass-cache
+*.gem
+*.gcno
+.svn/*
+.cproject
+.project
+.settings/
+*.db
+*.aps
+
+# Configuration stuff
+
+GNUmakefile.in
+GNUmakefile
+/aclocal.m4
+/autom4te.cache/
+/src/config.h
+/config.h.in
+/config.log
+/config.status
+/configure
+/libtool
+/m4/libtool.m4
+/m4/ltoptions.m4
+/m4/ltsugar.m4
+/m4/ltversion.m4
+/m4/lt~obsolete.m4
+/script/ar-lib
+/script/compile
+/script/config.guess
+/script/config.sub
+/script/depcomp
+/script/install-sh
+/script/ltmain.sh
+/script/missing
+/script/test-driver
+/src/stamp-h1
+/src/Makefile.in
+/src/Makefile
+libsass/*
+
+# Build stuff
+
+*.o
+*.lo
+*.so
+*.dll
+*.a
+*.suo
+*.sdf
+*.opendb
+*.opensdf
+a.out
+libsass.js
+tester
+tester.exe
+build/
+config.h.in*
+lib/pkgconfig/
+
+bin/*
+.deps/
+.libs/
+win/bin
+*.user
+win/*.db
+
+# Final results
+
+sassc++
+libsass.la
+src/support/libsass.pc
+
+# Cloned testing dirs
+sassc/
+sass-spec/
+
+installer/

.travis.yml

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+language: cpp
+sudo: false
+
+
+# don't create redundant code coverage reports
+# - AUTOTOOLS=yes COVERAGE=yes BUILD=static
+# - AUTOTOOLS=no COVERAGE=yes BUILD=shared
+# - AUTOTOOLS=no COVERAGE=no BUILD=static
+
+# further speed up day by day travis-ci builds
+# re-enable this if you change the makefiles
+# this will still catch all coding errors!
+# - AUTOTOOLS=yes COVERAGE=no BUILD=static
+
+# currenty there are various issues when
+# built with coverage, clang and autotools
+# - AUTOTOOLS=yes COVERAGE=yes BUILD=shared
+
+matrix:
+  include :
+    - os: linux
+      compiler: gcc
+      env: AUTOTOOLS=no COVERAGE=yes BUILD=static
+    - os: linux
+      compiler: g++-5
+      env: AUTOTOOLS=yes COVERAGE=no BUILD=shared
+      addons:
+        apt:
+          sources:
+            - ubuntu-toolchain-r-test
+          packages:
+            - g++-5
+    - os: linux
+      compiler: clang++-3.7
+      env: AUTOTOOLS=no COVERAGE=yes BUILD=static
+      addons:
+        apt:
+          sources:
+            - ubuntu-toolchain-r-test
+            - llvm-toolchain-precise-3.7
+          packages:
+            - clang-3.7
+    - os: linux
+      compiler: clang
+      env: AUTOTOOLS=yes COVERAGE=no BUILD=shared
+    - os: osx
+      compiler: clang
+      env: AUTOTOOLS=no COVERAGE=no BUILD=shared
+    - os: osx
+      compiler: clang
+      env: AUTOTOOLS=no COVERAGE=yes BUILD=static
+    - os: osx
+      compiler: clang
+      env: AUTOTOOLS=yes COVERAGE=no BUILD=shared
+
+script:
+  - ./script/ci-build-libsass
+  - ./script/ci-build-plugin math
+  - ./script/ci-build-plugin glob
+  - ./script/ci-build-plugin digest
+  - ./script/ci-build-plugin tests
+before_install: ./script/ci-install-deps
+install: ./script/ci-install-compiler
+after_success: ./script/ci-report-coverage

COPYING

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+
+Copyright (C) 2012 by Hampton Catlin
+
+Permission is hereby granted, free of charge, to any person obtaining a copy of
+this software and associated documentation files (the "Software"), to deal in
+the Software without restriction, including without limitation the rights to
+use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies
+of the Software, and to permit persons to whom the Software is furnished to do
+so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.
+
+
+The following files in the spec were taken from the original Ruby Sass project which
+is copyright Hampton Catlin, Nathan Weizenbaum, and Chris Eppstein and under
+the same license.

GNUmakefile.am

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+ACLOCAL_AMFLAGS = ${ACLOCAL_FLAGS} -I m4 -I script
+
+AM_COPT = -Wall -O2
+AM_COVLDFLAGS =
+
+if ENABLE_COVERAGE
+	AM_COPT = -Wall -O1 -fno-omit-frame-pointer --coverage
+	AM_COVLDFLAGS += -lgcov
+endif
+
+AM_CPPFLAGS = -I$(top_srcdir)/include
+AM_CFLAGS   = $(AM_COPT)
+AM_CXXFLAGS = $(AM_COPT)
+AM_LDFLAGS  = $(AM_COPT) $(AM_COVLDFLAGS)
+
+# only needed to support old source tree
+# we have moved the files to src folder
+AM_CPPFLAGS += -I$(top_srcdir)
+
+RESOURCES =
+if COMPILER_IS_MINGW32
+  RESOURCES += res/libsass.rc
+  AM_CXXFLAGS += -std=gnu++0x
+else
+  AM_CXXFLAGS += -std=c++0x
+endif
+
+TEST_EXTENSIONS = .rb
+
+if ENABLE_TESTS
+
+SASS_SASSC_PATH ?= $(top_srcdir)/sassc
+SASS_SPEC_PATH ?= $(top_srcdir)/sass-spec
+
+noinst_PROGRAMS = tester
+tester_LDADD = src/libsass.la
+tester_LDFLAGS = $(AM_LDFLAGS)
+nodist_tester_SOURCES = $(SASS_SASSC_PATH)/sassc.c
+SASS_SASSC_VERSION ?= `cd "$(SASS_SASSC_PATH)" && ./version.sh`
+tester_CFLAGS = $(AM_CFLAGS) -DSASSC_VERSION="\"$(SASS_SASSC_VERSION)\""
+tester_CXXFLAGS = $(AM_CXXFLAGS) -DSASSC_VERSION="\"$(SASS_SASSC_VERSION)\""
+
+if ENABLE_COVERAGE
+nodist_EXTRA_tester_SOURCES = non-existent-file-to-force-CXX-linking.cxx
+endif
+
+TESTS = $(SASS_SPEC_PATH)/sass-spec.rb
+RB_LOG_COMPILER = ./script/tap-runner
+AM_RB_LOG_FLAGS = $(RUBY)
+
+SASS_TEST_FLAGS = -V 3.5 --impl libsass
+SASS_TEST_FLAGS += -r $(SASS_SPEC_PATH)
+SASS_TEST_FLAGS += -c $(top_srcdir)/tester$(EXEEXT)
+AM_TESTS_ENVIRONMENT = TEST_FLAGS='$(SASS_TEST_FLAGS)'
+
+SASS_TESTER = $(RUBY) $(SASS_SPEC_PATH)/sass-spec.rb
+
+test:
+	$(SASS_TESTER) $(SASS_TEST_FLAGS)
+
+test_build:
+	$(SASS_TESTER) $(SASS_TEST_FLAGS)
+
+test_full:
+	$(SASS_TESTER) --run-todo $(SASS_TEST_FLAGS)
+
+test_probe:
+	$(SASS_TESTER) --probe-todo $(SASS_TEST_FLAGS)
+
+.PHONY: test test_build test_full test_probe
+
+endif
+
+SUBDIRS = src

INSTALL

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+// Autotools requires us to have this file. Boo.