Merge pull request #38 from jgmdev/language_diff

Language Diff

2 files changed, 71 insertions, 0 deletions

diff --git a/README.md b/README.md
index 21aadc6..5f30096 100644
--- a/README.md
+++ b/README.md
@@ -52,6 +52,7 @@ to something other than a raw file it should be marked with an asterisk.*
 | [`language_crystal`](https://github.com/Tamnac/lite-xl-plugins)                                                | Syntax for the [Crystal](https://crystal-lang.org) programming language                                                                                                                                                                                                                         |
 | [`language_csharp`](plugins/language_csharp.lua?raw=1)                                                         | Syntax for the [C#](http://csharp.net) programming language                                                                                                                                                                                                                                     |
 | [`language_d`](plugins/language_d.lua?raw=1)                                                                   | Syntax for the [D](https://dlang.org/) programming language                                                                                                                                                                                                                                     |
+| [`language_diff`](plugins/language_diff.lua?raw=1)                                                             | Syntax for diff and patch files                                                                                                                                                                                                                                                                 |
 | [`language_dart`](plugins/language_dart.lua?raw=1)                                                             | Syntax for the [Dart](https://dart.dev/) programming languiage                                                                                                                                                                                                                                  |
 | [`language_elixir`](plugins/language_elixir.lua?raw=1)                                                         | Syntax for the [Elixir](https://elixir-lang.org) programming language                                                                                                                                                                                                                           |
 | [`language_elm`](plugins/language_elm.lua?raw=1)                                                               | Syntax for the [Elm](https://elm-lang.org) programming language                                                                                                                                                                                                                                 |
diff --git a/plugins/language_diff.lua b/plugins/language_diff.lua
new file mode 100644
index 0000000..4376b26
--- /dev/null
+++ b/plugins/language_diff.lua
@@ -0,0 +1,70 @@
+-- mod-version:2 -- lite-xl 2.0
+local syntax = require "core.syntax"
+local style = require "core.style"
+local common = require "core.common"
+
+-- we need these symbol types to have uniform colors
+style.syntax["diff_add"] = { common.color "#72b886" }
+style.syntax["diff_del"] = { common.color "#F36161" }
+
+syntax.add {
+  name = "Diff",
+  files = { "%.diff$", "%.patch$", "%.rej$" },
+  headers = "^diff %-",
+  patterns = {
+    -- Method the patch was generated with and source/target files
+    { regex = "^diff .+",                    type = "function" },
+    -- Seen for changing the file permissions
+    { regex = "^new .+",                     type = "comment"  },
+    -- Usually holds starting and ending commit
+    { regex = "^index .+",                   type = "comment"  },
+    -- Position to patch
+    {
+      pattern = "@@.-@@ ().+",             --with heading
+      type = { "number", "string" }
+    },
+    {
+      regex = "^@@ [\\d,\\-\\+ ]+ @@\n",   --wihtout heading
+      type = "number"
+    },
+    -- Other position to patch formats
+    {
+      regex = "^-{3} [\\d]+,[\\d]+ \\-{4}\n",
+      type = "number"
+    },
+    {
+      regex = "^\\*{3} [\\d]+,[\\d]+ \\*{4}\n",
+      type = "number"
+    },
+    -- Source and target file
+    { regex = "^-{3} .+",                    type = "keyword"  },
+    { regex = "^\\+{3} .+",                  type = "keyword"  },
+    -- Rarely used source file indicator
+    { regex = "^\\*{3} .+",                  type = "keyword"  },
+    -- git patches seem to add 3 dashes to separate message from changed files
+    { regex = "^-{3}\n",                     type = "normal"   },
+    -- Addition and deletion of lines
+    { regex = "^-.*",                        type = "diff_del" },
+    { regex = "^\\+.*",                      type = "diff_add" },
+    { regex = "^<.*",                        type = "diff_del" },
+    { regex = "^>.*",                        type = "diff_add" },
+    -- Change between two lines
+    { regex = "^!.*",                        type = "number"   },
+    -- Stuff usually found on a authored patch heading
+    {
+      pattern = "From ()[a-fA-F0-9]+ ().+",
+      type = { "keyword", "number", "string" }
+    },
+    { regex = "^[a-zA-Z\\-]+: ",             type = "keyword" },
+    -- Diff stats
+    { regex = "^ [\\d]+ files? changed",     type = "function" },
+    { regex = "[\\d]+ insertions?\\(\\+\\)", type = "diff_add" },
+    { regex = "[\\d]+ deletions?\\(\\-\\)",  type = "diff_del" },
+    -- Match e-mail
+    {
+      pattern = ".*()<[a-zA-Z0-9_.+-]+@[a-zA-Z0-9-]+%.[a-zA-Z0-9-.]+>",
+      type = {"string", "keyword2"}
+    },
+  },
+  symbols = {}
+}