Add files

.gitignore

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+.dub
+docs.json
+__dummy.html
+docs/
+/graphviz
+graphviz.so
+graphviz.dylib
+graphviz.dll
+graphviz.a
+graphviz.lib
+graphviz-test-*
+*.exe
+*.o
+*.obj
+*.lst

README.md

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+# DDeps
+
+Source review support tool.
+
+A tool for creating module dependency graphs. And visualize the differences between the two snapshots.
+
+# Screenshot (Example)
+![rx](https://github.com/lempiji/ddeps/blob/master/rx-deps.png)
+
+# Requirements
+1. dub
+2. Graphviz (for visualize)
+
+# Settings
+
+## For library (example)
+```json
+	"configurations": [
+		{
+			"name": "default"
+		},
+		{
+			"name": "diff",
+			"postGenerateCommands": [
+				"dub build -c makedeps",
+				"ddeps --focus=rx --out=deps.dot",
+				"dot -Tsvg -odeps.svg deps.dot"
+			]
+		},
+		{
+			"name": "diff-update",
+			"postGenerateCommands": [
+				"ddeps --focus=rx --update"
+			]
+		},
+		{
+			"name": "makedeps",
+			"dflags": ["-deps=deps.txt"]
+		}
+    ]
+```
+
+## For executable
+```json
+	"configurations": [
+		{
+			"name": "default"
+		},
+		{
+			"name": "diff",
+			"postGenerateCommands": [
+				"dub build -c makedeps",
+				"ddeps --out=deps.dot",
+				"dot -Tsvg -odeps.svg deps.dot"
+			]
+		},
+		{
+			"name": "diff-update",
+			"postGenerateCommands": [
+				"ddeps --update"
+			]
+		},
+		{
+			"name": "makedeps",
+			"dflags": ["-deps=deps.txt"]
+		}
+    ]
+```
+
+# Usage
+
+## At first
+create lock file
+
+```bash
+dub build -c makedeps
+dub build -c diff-update
+```
+
+## Basic
+1. Modify source
+2. Update diff
+	- `dub build -c diff`
+3. Do review with the dependency graph diff
+	- Open the `deps.svg` in browser
+
+## Compare 2 versions
+
+1. checkout a target version
+	- `git reset --hard XXX` or `git checkout XXXXX`
+2. reset to source version
+	- `git reset --hard HEAD~10` (e.g. 10 versions ago)
+3. create `deps-lock.txt`
+	- `dub build -c makedeps`
+	- `dub build -c diff-update`
+	- if `dub.json` / `dub.sdl` has not configure then add these.  
+4. reset to target version
+	- `git reset --hard ORIG_HEAD`
+5. make diff
+	- `dub build -c diff`
+6. open `deps.svg`
+
+
+# Arguments
+
+| name | Usage | description | default |
+|:-----|:------------|:--|:--|
+| input | `-i` or `--input` | deps file name | `deps.txt` |
+| output | `-o XXX` or `--output=XXX` | destination file name | write to stdout |
+| update | `-u` or `--update` | update lock file | false |
+| lock | `-l` or `--lock` | lock file name | `deps-lock.txt` |
+| focus | `--focus=XXX` | filtering target by name | `app` |
+| depth | `-d` or `--depth` | update lock file | false |
+| help | `--help` | show help |  |

deps.dot

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+digraph {
+    {
+        "app"
+        "core.bitop"
+        "core.checkedint"
+        "core.exception"
+        "core.internal.traits"
+        "core.memory"
+        "core.stdc.string"
+        "std.algorithm"
+        "std.algorithm.comparison"
+        "std.algorithm.iteration"
+        "std.algorithm.mutation"
+        "std.algorithm.searching"
+        "std.array"
+        "std.ascii"
+        "std.container.rbtree"
+        "std.conv"
+        "std.encoding"
+        "std.exception"
+        "std.file"
+        "std.format"
+        "std.functional"
+        "std.getopt"
+        "std.internal.memory"
+        "std.internal.unicode_tables"
+        "std.meta"
+        "std.range"
+        "std.range.primitives"
+        "std.stdio"
+        "std.system"
+        "std.traits"
+        "std.typecons"
+        "std.uni"
+        "std.utf"
+    }
+    "app" -> "core.bitop";
+    "app" -> "core.checkedint";
+    "app" -> "core.exception";
+    "app" -> "core.internal.traits";
+    "app" -> "core.memory";
+    "app" -> "core.stdc.string";
+    "app" -> "std.algorithm";
+    "app" -> "std.algorithm.comparison";
+    "app" -> "std.algorithm.iteration";
+    "app" -> "std.algorithm.mutation";
+    "app" -> "std.algorithm.searching";
+    "app" -> "std.array";
+    "app" -> "std.ascii";
+    "app" -> "std.container.rbtree";
+    "app" -> "std.conv";
+    "app" -> "std.encoding";
+    "app" -> "std.exception";
+    "app" -> "std.file";
+    "app" -> "std.format";
+    "app" -> "std.functional";
+    "app" -> "std.getopt";
+    "app" -> "std.internal.memory";
+    "app" -> "std.internal.unicode_tables";
+    "app" -> "std.meta";
+    "app" -> "std.range";
+    "app" -> "std.range.primitives";
+    "app" -> "std.stdio";
+    "app" -> "std.system";
+    "app" -> "std.traits";
+    "app" -> "std.typecons";
+    "app" -> "std.uni";
+    "app" -> "std.utf";
+}