# The `stack dot` command ~~~text stack dot [--[no-]external] [--[no-]include-base] [--depth DEPTH] [--prune PACKAGES] [TARGET] [--flag PACKAGE:[-]FLAG] [--test] [--bench] [--global-hints] ~~~ A package and its dependencies and the direct dependency relationships between them form a directed graph. [Graphviz](https://www.graphviz.org/) is open source software that visualises graphs. It provides the DOT language for defining graphs and the `dot` executable for drawing directed graphs. Graphviz is available to [download](https://www.graphviz.org/download/) for Linux, Windows, macOS and FreeBSD. `stack dot` produces output, to the standard output channel, in the DOT language to represent the relationships between your packages and their dependencies. By default: * external dependencies are excluded from the output. Pass the flag `--external` to include external dependencies; * the `base` package and its dependencies are included in the output. Pass the flag `--no-include-base` to exclude `base` and its dependencies; * there is no limit to the depth of the resolution of dependencies. Pass the `--depth ` option to limit the depth; * all relevant packages are included in the output. Pass the `--prude ` option to exclude the specified packages, where `` is a list of package names separated by commas; * all packages in the project are included in the output. However, the target for the command can be specified as an argument. It uses the same format as the [`stack build` command](build_command.md); * test components of the packages in the project are excluded from the output. Pass the flag `--test` to include test components; and * benchmark components of the packages in the project are excluded from the output. Pass the flag `--bench` to include benchmark components.git p Pass the option `--flag :` or `--flag :-` to set or unset a Cabal flag. This option can be specified multiple times. Pass the flag `--global-hints` to use a hint file for global packages. If a hint file is used, GHC does not need to be installed. ## Examples The following examples are based on a version of the [`wreq` package](https://hackage.haskell.org/package/wreq). In each case, the output from `stack dot` is piped as an input into Graphviz's `dot` executable, and `dot` produces output in the form of a PNG file named `wreq.png`. * A simple example: ~~~text stack dot | dot -Tpng -o wreq.png ~~~ [](https://cloud.githubusercontent.com/assets/591567/8478591/ae10a418-20d2-11e5-8945-55246dcfac62.png) * Include external dependencies: ~~~text stack dot --external | dot -Tpng -o wreq.png ~~~ [](https://cloud.githubusercontent.com/assets/591567/8478621/d247247e-20d2-11e5-993d-79096e382abd.png) * Include external dependencies, limit the depth and save the output from `stack dot` as an intermediate file (`wreq.dot`). ~~~text stack dot --external --depth 1 > wreq.dot dot -Tpng -o wreq.png wreq.dot ~~~ * Include external dependencies, exclude `base` and limit the depth: ~~~text stack dot --no-include-base --external --depth 1 | dot -Tpng -o wreq.png ~~~ [](https://cloud.githubusercontent.com/assets/591567/8484310/45b399a0-20f7-11e5-8068-031c2b352961.png) * Include external dependencies and prune `base` and other packages: ~~~text stack dot --external --prune base,lens,wreq-examples,http-client,aeson,tls,http-client-tls,exceptions | dot -Tpng -o wreq.png ~~~ [](https://cloud.githubusercontent.com/assets/591567/8478768/adbad280-20d3-11e5-9992-914dc24fe569.png) * Include external dependencies, prune `base` and other packages, and use a different Graphviz executable to draw the graph: Graphviz's `twopi` executable draws graphs in a radial layout. ~~~text stack dot --external --prune base,lens,wreq-examples,http-client,aeson,tls,http-client-tls,exceptions | twopi -Groot=wreq -Goverlap=false -Tpng -o wreq.png ~~~ [](https://cloud.githubusercontent.com/assets/591567/8495538/9fae1184-216e-11e5-9931-99e6147f8aed.png)