[Git Files] Add Git Files package (sublimehq#1126)

Developed by: @y0ssar1an and @deathaxe 
Reviewed by: @rwols, @FichteFoll, @keith-hall, @michaelblyons and @jrappen

Git Files/Comments.tmPreferences

@@ -0,0 +1,21 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<plist version="1.0">
+<dict>
+	<key>name</key>
+	<string>Comments</string>
+	<key>scope</key>
+	<string>text.git</string>
+	<key>settings</key>
+	<dict>
+		<key>shellVariables</key>
+		<array>
+			<dict>
+				<key>name</key>
+				<string>TM_COMMENT_START</string>
+				<key>value</key>
+				<string># </string>
+			</dict>
+		</array>
+	</dict>
+</dict>
+</plist>

Git Files/Completions/Git Attributes - Attributes.sublime-completions

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+{
+    "scope": "meta.attributes-list.git.attributes - meta.mapping.value - punctuation.separator",
+    "completions": [
+        {"trigger": "binary\tattribute", "contents": "binary"},
+        {"trigger": "conflict-marker-size\tattribute", "contents": "conflict-marker-size"},
+        {"trigger": "delta\tattribute", "contents": "delta"},
+        {"trigger": "diff\tattribute", "contents": "diff"},
+        {"trigger": "encoding\tattribute", "contents": "encoding"},
+        {"trigger": "eol\tattribute", "contents": "eol"},
+        {"trigger": "export-ignore\tattribute", "contents": "export-ignore"},
+        {"trigger": "export-subst\tattribute", "contents": "export-subst"},
+        {"trigger": "filter\tattribute", "contents": "filter"},
+        {"trigger": "ident\tattribute", "contents": "ident"},
+        {"trigger": "merge\tattribute", "contents": "merge"},
+        {"trigger": "text\tattribute", "contents": "text"},
+        {"trigger": "whitespace\tattribute", "contents": "whitespace"}
+    ]
+}

Git Files/Completions/Git Attributes - Diff.sublime-completions

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+{
+    "scope": "meta.mapping.expect-value & meta.attribute.builtin.diff.git.attributes",
+    "completions": [
+        {"trigger": "ada\t(built-in) diff", "contents": "ada"},
+        {"trigger": "astextplain\t(built-in) diff", "contents": "astextplain"},
+        {"trigger": "bibtex\t(built-in) diff", "contents": "bibtex"},
+        {"trigger": "cpp\t(built-in) diff", "contents": "cpp"},
+        {"trigger": "csharp\t(built-in) diff", "contents": "csharp"},
+        {"trigger": "css\t(built-in) diff", "contents": "css"},
+        {"trigger": "exif\t(built-in) diff", "contents": "exif"},
+        {"trigger": "fortran\t(built-in) diff", "contents": "fortran"},
+        {"trigger": "fountain\t(built-in) diff", "contents": "fountain"},
+        {"trigger": "html\t(built-in) diff", "contents": "html"},
+        {"trigger": "java\t(built-in) diff", "contents": "java"},
+        {"trigger": "matlab\t(built-in) diff", "contents": "matlab"},
+        {"trigger": "objc\t(built-in) diff", "contents": "objc"},
+        {"trigger": "pascal\t(built-in) diff", "contents": "pascal"},
+        {"trigger": "perl\t(built-in) diff", "contents": "perl"},
+        {"trigger": "php\t(built-in) diff", "contents": "php"},
+        {"trigger": "python\t(built-in) diff", "contents": "python"},
+        {"trigger": "ruby\t(built-in) diff", "contents": "ruby"},
+        {"trigger": "tex\t(built-in) diff", "contents": "tex"},
+        {"trigger": "word\t(built-in) diff", "contents": "word"}
+    ]
+}

Git Files/Completions/Git Attributes - EOL.sublime-completions

@@ -0,0 +1,7 @@
+{
+    "scope": "meta.mapping.expect-value & meta.attribute.builtin.eol.git.attributes",
+    "completions": [
+        {"trigger": "crlf\teol", "contents": "crlf"},
+        {"trigger": "lf\teol", "contents": "lf"}
+    ]
+}

Git Files/Completions/Git Attributes - Encoding.sublime-completions

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+{
+    "scope": "meta.mapping.expect-value & meta.attribute.builtin.encoding.git.attributes",
+    "completions": [
+        {"trigger": "ASCII\tAscii", "contents": "ascii"},
+        {"trigger": "UTF-8\tUnicode", "contents": "utf-8"},
+        {"trigger": "UTF-16 LE\tUnicode", "contents": "utf-16-le"},
+        {"trigger": "UTF-16 BE\tUnicode", "contents": "utf-16-be"},
+        {"trigger": "ISO 8859-1\tWestern", "contents": "iso-8859-1"},
+        {"trigger": "ISO 8859-10\tNordic", "contents": "iso-8859-10"},
+        {"trigger": "ISO 8859-13\tEstonian", "contents": "iso-8859-13"},
+        {"trigger": "ISO 8859-14\tCeltic", "contents": "iso-8859-14"},
+        {"trigger": "ISO 8859-15\tWestern", "contents": "iso-8859-15"},
+        {"trigger": "ISO 8859-16\tRomanian", "contents": "iso-8859-16"},
+        {"trigger": "ISO 8859-2\tCentral European", "contents": "iso-8859-2"},
+        {"trigger": "ISO 8859-3\tWestern", "contents": "iso-8859-3"},
+        {"trigger": "ISO 8859-4\tBaltic", "contents": "iso-8859-4"},
+        {"trigger": "ISO 8859-5\tCyrillic", "contents": "iso-8859-5"},
+        {"trigger": "ISO 8859-6\tArabic", "contents": "iso-8859-6"},
+        {"trigger": "ISO 8859-7\tGreek", "contents": "iso-8859-7"},
+        {"trigger": "ISO 8859-8\tHebrew", "contents": "iso-8859-8"},
+        {"trigger": "ISO 8859-9\tTurkish", "contents": "iso-8859-9"},
+        {"trigger": "Windows 866\tCyrillic", "contents": "windows-866"},
+        {"trigger": "Windows 1250\tCentral European", "contents": "windows-1250"},
+        {"trigger": "Windows 1251\tCyrillic", "contents": "windows-1251"},
+        {"trigger": "Windows 1252\tWestern", "contents": "windows-1252"},
+        {"trigger": "Windows 1253\tGreek", "contents": "windows-1253"},
+        {"trigger": "Windows 1254\tTurkish", "contents": "windows-1254"},
+        {"trigger": "Windows 1255\tHebrew", "contents": "windows-1255"},
+        {"trigger": "Windows 1256\tArabic", "contents": "windows-1256"},
+        {"trigger": "Windows 1257\tBaltic", "contents": "windows-1257"},
+        {"trigger": "Windows 1258\tVietnamese", "contents": "windows-1258"},
+        {"trigger": "big5\tChineese Traditional", "contents": "gb2312"},
+        {"trigger": "CP 437\tDOS", "contents": "cp-437"},
+        {"trigger": "euc_jp\tJapaneese", "contents": "euc_jp"},
+        {"trigger": "euc_kr\tKorean", "contents": "euc_kr"},
+        {"trigger": "gb2312\tChineese Simplified", "contents": "gb2312"},
+        {"trigger": "KOI8-R\tCyrillic", "contents": "koi8-r"},
+        {"trigger": "KOI8-U\tCyrillic", "contents": "koi8-u"},
+        {"trigger": "Mac Roman\tWestern", "contents": "mac-roman"},
+        {"trigger": "Shift_JIS\tJapaneese", "contents": "Shift_JIS"},
+    ]
+}

Git Files/Completions/Git Attributes - Filter.sublime-completions

@@ -0,0 +1,5 @@
+{
+    "scope": "meta.mapping.expect-value & meta.attribute.builtin.filter.git.attributes",
+    "completions": [
+    ]
+}

Git Files/Completions/Git Attributes - Merge.sublime-completions

@@ -0,0 +1,13 @@
+{
+    "scope": "meta.mapping.expect-value & meta.attribute.builtin.merge.git.attributes",
+    "completions": [
+        {"trigger": "binary\t(built-in) merge", "contents": "binary"},
+        {"trigger": "ours\t(built-in) merge", "contents": "ours"},
+        {"trigger": "patience\t(built-in) merge", "contents": "patience"},
+        {"trigger": "recursive\t(built-in) merge", "contents": "recursive"},
+        {"trigger": "resolve\t(built-in) merge", "contents": "resolve"},
+        {"trigger": "text\t(built-in) merge", "contents": "text"},
+        {"trigger": "theirs\t(built-in) merge", "contents": "theirs"},
+        {"trigger": "union\t(built-in) merge", "contents": "union"}
+    ]
+}

Git Files/Completions/Git Attributes - Text.sublime-completions

@@ -0,0 +1,6 @@
+{
+    "scope": "meta.mapping.expect-value & meta.attribute.builtin.text.git.attributes",
+    "completions": [
+        {"trigger": "auto\ttext", "contents": "auto"}
+    ]
+}

Git Files/Completions/Git Attributes - Whitespace.sublime-completions

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+{
+    "scope": "meta.mapping.expect-value & meta.attribute.builtin.whitespace.git.attributes",
+    "completions": [
+        {"trigger": "blank-at-eof\twhitespace", "contents": "blank-at-eof"},
+        {"trigger": "blank-at-eol\twhitespace", "contents": "blank-at-eol"},
+        {"trigger": "cr-at-eol\twhitespace", "contents": "cr-at-eol"},
+        {"trigger": "indent-with-non-tab\twhitespace", "contents": "indent-with-non-tab"},
+        {"trigger": "space-before-tab\twhitespace", "contents": "space-before-tab"},
+        {"trigger": "tab-in-indent\twhitespace", "contents": "tab-in-indent"},
+        {"trigger": "trailing-space\twhitespace", "contents": "trailing-space"},
+        {"trigger": "tabwidth=x\twhitespace", "contents": "tabwidth=${0:8}"}
+    ]
+}

Git Files/Git Attributes.sublime-settings

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+{
+    "auto_complete_selector": "text.git - comment - string.quoted",
+    "auto_complete_triggers": [
+        {
+            "selector": "meta.attributes-list.git.attributes - meta.attribute - punctuation.separator",
+            "characters": " -!"
+        },
+        {
+            "selector": "meta.attribute.builtin & meta.mapping.expect-value.git.attributes",
+            "characters": "-=,"
+        }
+    ],
+    "word_separators": "./\\()\"':,.;<>~!@#$%^&*|+=[]{}`~?" // default without '-'
+}

Git Files/Git Attributes.sublime-syntax

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+%YAML 1.2
+---
+# Syntax based on documentation here:
+# https://git-scm.com/docs/gitattributes
+# https://git-scm.com/book/en/v2/Customizing-Git-Git-Attributes
+
+# Examples: https://github.com/alexkaratarakis/gitattributes
+
+name: Git Attributes
+file_extensions:
+  - attributes                # .git/info/attributes
+  - gitattributes             # *.gitattributes
+  - .gitattributes            # ~/.gitattributes
+scope: text.git.attributes
+
+contexts:
+
+  main:
+    - include: Git Common.sublime-syntax#comments-line
+    - include: macro
+    - include: pattern
+
+##[ MACROS ]###########################################################
+
+  macro:
+    - match: (\[)([^-!]\S*)(\])
+      scope: meta.brackets.git.attributes
+      captures:
+        1: punctuation.definition.brackets.begin.git.attributes
+        2: string.unquoted.git.attributes entity.name.macro.git.attributes
+        3: punctuation.definition.brackets.end.git.attributes
+      push: attributes-list
+
+##[ PATH PATTERN ]#####################################################
+
+  pattern:
+    # ignore whitespace at the beginning of a line
+    # patterns may not start with operators: - ! [
+    - match: '[-!\[]|(?=\S)'
+      scope: invalid.illegal.operator.git.attributes
+      push: [pattern-attributes, pattern-content]
+
+  pattern-content:
+    # quoted path pattern
+    - match: \"
+      scope: punctuation.definition.string.begin.git.attributes
+      set: [pattern-content-quoted, Git Common.sublime-syntax#fnmatch-start]
+    # unquoted path pattern
+    - match: ''
+      set: [pattern-content-unquoted, Git Common.sublime-syntax#fnmatch-start]
+
+  pattern-content-quoted:
+    - meta_scope: string.quoted.double.git.attributes
+    - meta_content_scope: entity.name.pattern.git.attributes
+    - include: string-end
+    - include: Git Common.sublime-syntax#fnmatch-body
+
+  pattern-content-unquoted:
+    - meta_scope: string.unquoted.git.attributes
+    - meta_content_scope: entity.name.pattern.git.attributes
+    - match: (?=\s)
+      pop: true
+    - include: Git Common.sublime-syntax#fnmatch-body
+
+  pattern-attributes:
+    - match: ''
+      set: attributes-list
+
+##[ ATTRIBUTES LIST ]##################################################
+
+  attributes-list:
+    - meta_content_scope: meta.attributes-list.git.attributes
+    # attriubte list ends with line
+    - match: $\n?
+      scope: meta.attributes-list.git.attributes
+      pop: true
+    # set/unset operators
+    - match: '[-!](?=\w)'
+      scope: keyword.operator.logical.git.attributes
+    # known attributes
+    - match: (?=diff\b)
+      push: [meta-diff, attribute-key]
+    - match: (?=encoding\b)
+      push: [meta-encoding, attribute-key]
+    - match: (?=eol\b)
+      push: [meta-eol, attribute-key]
+    - match: (?=filter\b)
+      push: [meta-filter, attribute-key]
+    - match: (?=merge\b)
+      push: [meta-merge, attribute-key]
+    - match: (?=text\b)
+      push: [meta-text, attribute-key]
+    - match: (?=whitespace\b)
+      push: [meta-whitespace, attribute-key]
+    # unknown/other attribute
+    - match: (?=\w)
+      push: [meta-other, attribute-key]
+    # close the meta mapping gab
+    - match: \s+
+      scope: meta.mapping.git.attributes
+    # invalid attribute name
+    - match: \S+
+      scope: invalid.illegal.attribute-name.git.attributes
+
+  meta-diff:
+    - meta_scope: meta.attribute.builtin.diff.git.attributes
+    - include: else-pop
+
+  meta-encoding:
+    - meta_scope: meta.attribute.builtin.encoding.git.attributes
+    - include: else-pop
+
+  meta-eol:
+    - meta_scope: meta.attribute.builtin.eol.git.attributes
+    - include: else-pop
+
+  meta-filter:
+    - meta_scope: meta.attribute.builtin.filter.git.attributes
+    - include: else-pop
+
+  meta-merge:
+    - meta_scope: meta.attribute.builtin.merge.git.attributes
+    - include: else-pop
+
+  meta-text:
+    - meta_scope: meta.attribute.builtin.text.git.attributes
+    - include: else-pop
+
+  meta-whitespace:
+    - meta_scope: meta.attribute.builtin.whitespace.git.attributes
+    - include: else-pop
+
+  meta-other:
+    - meta_scope: meta.attribute.other.git.attributes
+    - include: else-pop
+
+##[ ATTRIBUTE KEY VALUE ]##############################################
+
+  attribute-key:
+    - match: \w+[-\w]*\b
+      scope: meta.mapping.key.git.attributes variable.language.attribute.git.attributes
+      set: attribute-maybe-value-list
+    - include: else-pop
+
+  attribute-maybe-value-list:
+    - meta_content_scope: meta.mapping.git.attributes
+    - match: =(?=\S)
+      scope: punctuation.separator.mapping.key-value.git.attributes
+      set: [attribute-value-list, attribute-value-content]
+    - match: =
+      scope: punctuation.separator.mapping.key-value.git.attributes
+      set: attribute-value-expected
+    - include: attribute-separator
+    - include: else-pop
+
+  attribute-value-list:
+    - meta_content_scope: meta.mapping.value.git.attributes
+    - include: attribute-separator
+    - match: ',(?=\S)'
+      scope: punctuation.separator.mapping.values.git.attributes
+      push: attribute-value-content
+    - match: ','
+      scope: punctuation.separator.mapping.values.git.attributes
+      set: attribute-value-expected
+    - match: \S
+      scope: invalid.illegal.value.git.attributes
+    - include: else-pop
+
+  attribute-value-content:
+    # double quoted value
+    - match: \"
+      scope: punctuation.definition.string.begin.git.attributes
+      set:
+        - meta_scope: string.quoted.double.git.attributes
+        - include: string-end
+        - match: \\[\\\"\'fnrst]
+          scope: constant.character.escape.git.attributes
+    # unquoted value is everything except , and whitespace
+    - match: '[^,\s]*'
+      scope: string.unquoted.git.attributes
+      pop: true
+    - include: else-pop
+
+  attribute-value-expected:
+    # Attributes are separated by whitespace
+    # One whitespace after each attribute/value is captured as separator
+    - match: \s
+      scope: meta.mapping.expect-value.git.attributes punctuation.separator.mapping.pair.git.attributes
+      pop: true
+
+  attribute-separator:
+    # Attributes are separated by whitespace
+    # One whitespace after each attribute/value is captured as separator
+    - match: \s
+      scope: meta.mapping.git.attributes punctuation.separator.mapping.pair.git.attributes
+      pop: true
+
+##[ PROTOTYPES ]#######################################################
+
+  string-end:
+    - match: \"
+      scope: punctuation.definition.string.end.git.attributes
+      pop: true
+    - match: $\n?
+      scope: invalid.illegal.unexpected.eol.git.attributes
+      pop: true
+
+  else-pop:
+    - match: ''
+      pop: true