[gtksourceview] docker.lang: add Dockerfile support

[Christian Hergert <chergert src gnome org>]

commit df77c1dd300a02a0837f0382e55d45cdb2c00816
Author: David Pérez Cabrera <dperezcabrera gmail com>
Date:   Sat Aug 3 13:59:19 2019 +0000

    docker.lang: add Dockerfile support

 data/language-specs/docker.lang | 173 ++++++++++++++++++++++++++++++++++++++++
 1 file changed, 173 insertions(+)
---
diff --git a/data/language-specs/docker.lang b/data/language-specs/docker.lang
new file mode 100644
index 00000000..b2a17c27
--- /dev/null
+++ b/data/language-specs/docker.lang
@@ -0,0 +1,173 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!--
+
+ Authors: David Perez Cabrera <dperezcabrera gmail com>
+ Copyright (C) 2019 David Perez Cabrera <dperezcabrera gmail com>
+
+ GtkSourceView is free software; you can redistribute it and/or
+ modify it under the terms of the GNU Lesser General Public
+ License as published by the Free Software Foundation; either
+ version 2.1 of the License, or (at your option) any later version.
+
+ GtkSourceView is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public License
+ along with this library; if not, see <http://www.gnu.org/licenses/>.
+
+-->
+<language id="docker" name="Dockerfile" version="2.0" _section="Source">
+  <metadata>
+    <property name="mimetypes">application/docker;text/docker</property>
+    <property name="globs">Dockerfile</property>
+    <property name="line-comment-start">#</property>
+  </metadata>
+
+  <styles>
+    <style id="comment" name="Comment" map-to="def:comment"/>
+    <style id="keyword" name="Keyword" map-to="def:keyword"/>
+    <style id="operator" name="Operator" map-to="def:operator"/>
+    <style id="string" name="String" map-to="def:string"/>
+    <style id="variable" name="Variable" map-to="def:special-char"/>
+    <style id="variable-definition" name="Variable Definition" map-to="docker:variable"/>
+    <style id="user" name="User" map-to="def:identifier"/>
+    <style id="alias-definition" name="Alias definition" map-to="def:identifier"/>
+    <style id="number" name="Number" map-to="def:number"/>
+  </styles>
+
+  <definitions>
+
+    <context id="operator">
+      <match>(\s*)(&amp;&amp;|\|\|)(\s*)</match>
+      <include>
+        <context sub-pattern="2" style-ref="operator"/>
+      </include>
+    </context>
+
+    <context id="short-parameter-expansion" style-ref="variable">
+      <match>\$([!@?*#\$0-9]|[a-zA-Z0-9_]+)</match>
+    </context>
+
+    <context id="parameter-expansion" style-ref="variable">
+      <start>\$\{</start>
+      <end>\}</end>
+      <include>
+        <context ref="single-quoted-string"/>
+        <context ref="double-quoted-string"/>
+        <context ref="variable"/>
+      </include>
+    </context>
+
+    <context id="variable">
+      <include>
+        <context ref="short-parameter-expansion"/>
+        <context ref="parameter-expansion"/>
+      </include>
+    </context>
+
+    <context id="user">
+      <match>^\s*(USER)\s+([a-zA-Z_][a-zA-Z0-9_]*)</match>
+      <include>
+        <context sub-pattern="2" style-ref="user"/>
+        <context sub-pattern="1" style-ref="keyword"/>
+      </include>
+    </context>
+
+    <context id="alias-definition">
+      <match>\s+(AS)\s+([a-zA-Z][a-zA-Z0-9_]*)</match>
+      <include>
+        <context sub-pattern="2" style-ref="user"/>
+        <context sub-pattern="1" style-ref="keyword"/>
+      </include>
+    </context>
+
+    <context id="alias-usage">
+      <match>^\s*(COPY\s+\-\-from)\=([a-zA-Z][a-zA-Z0-9_]*)</match>
+      <include>
+        <context sub-pattern="2" style-ref="user"/>
+        <context sub-pattern="1" style-ref="keyword"/>
+      </include>
+    </context>
+
+
+    <context id="from-image">
+      <match>^\s*(FROM)\s+([a-zA-Z][a-zA-Z0-9_/\:\-\.]*)</match>
+      <include>
+        <context sub-pattern="2" style-ref="user"/>
+        <context sub-pattern="1" style-ref="keyword"/>
+      </include>
+    </context>
+
+    <context id="variable-definition">
+      <match>^\s*(ARG|ENV)\s+([a-zA-Z_][a-zA-Z0-9_]*)(\=|\s+)</match>
+      <include>
+        <context sub-pattern="2" style-ref="variable-definition"/>
+        <context sub-pattern="1" style-ref="keyword"/>
+      </include>
+    </context>
+
+    <context id="comment" end-at-line-end="true" style-ref="comment" class-disabled="no-spell-check">
+      <start>#</start>
+    </context>
+
+    <context id="single-quoted-string" style-ref="string">
+      <start>'</start>
+      <end>'</end>
+    </context>
+
+    <context id="double-quoted-string" style-ref="string" class="string" class-disabled="no-spell-check">
+      <start>"</start>
+      <end>"</end>
+    </context>
+
+    <context id="numeric" style-ref="number">
+      <match extended="true">
+          (\b([0-9]+|0[xX][0-9a-fA-F]+)[Ll]?\b|
+          \b(([0-9]+[Ee][-]?[0-9]+|
+          ([0-9]*\.[0-9]+|[0-9]+\.)([Ee][-]?[0-9]+)?)[fFdD]?|
+          [0-9]+[FfDd]))
+      </match>
+    </context>
+
+    <context id="keywords" style-ref="keyword">
+      <keyword>AS</keyword>
+      <keyword>ADD</keyword>
+      <keyword>ARG</keyword>
+      <keyword>CMD</keyword>
+      <keyword>COPY</keyword>
+      <keyword>ENTRYPOINT</keyword>
+      <keyword>ENV</keyword>
+      <keyword>EXPOSE</keyword>
+      <keyword>FROM</keyword>
+      <keyword>HEALTHCHECK</keyword>
+      <keyword>LABEL</keyword>
+      <keyword>MAINTAINER</keyword>
+      <keyword>ONBUILD</keyword>
+      <keyword>RUN</keyword>
+      <keyword>SHELL</keyword>
+      <keyword>STOPSIGNAL</keyword>
+      <keyword>USER</keyword>
+      <keyword>VOLUME</keyword>
+      <keyword>WORKDIR</keyword>
+    </context>
+
+    <context id="docker" class="no-spell-check">
+      <include>
+        <context ref="comment"/>
+        <context ref="single-quoted-string"/>
+        <context ref="double-quoted-string"/>
+        <context ref="numeric"/>
+        <context ref="variable"/>
+        <context ref="variable-definition"/>
+        <context ref="user"/>
+        <context ref="alias-definition"/>
+        <context ref="alias-usage"/>
+        <context ref="from-image"/>
+        <context ref="operator"/>
+        <context ref="keywords"/>
+      </include>
+    </context>
+  </definitions>
+</language>