Add bacon config (#721)

Adds a bacon config which is useful when writing rustdoc. `bacon
doc-internal-open` will re-build the doc on changes.

Author: Hinton

bacon.toml

@@ -0,0 +1,77 @@
+# This is a configuration file for the bacon tool
+#
+# Bacon repository: https://github.com/Canop/bacon
+# Complete help on configuration: https://dystroy.org/bacon/config/
+# You can also check bacon's own bacon.toml file
+#  as an example: https://github.com/Canop/bacon/blob/main/bacon.toml
+
+default_job = "check"
+
+[jobs.check]
+command = ["cargo", "check", "--color", "always"]
+need_stdout = false
+
+[jobs.check-all]
+command = ["cargo", "check", "--all-targets", "--color", "always"]
+need_stdout = false
+
+[jobs.clippy]
+command = ["cargo", "clippy", "--all-targets", "--color", "always"]
+need_stdout = false
+
+[jobs.test]
+command = [
+    "cargo",
+    "test",
+    "--all-features",
+    "--color",
+    "always",
+    "--",
+    "--color",
+    "always",         # see https://github.com/Canop/bacon/issues/124
+]
+need_stdout = true
+
+[jobs.doc]
+command = ["cargo", "doc", "--color", "always", "--no-deps"]
+need_stdout = false
+
+# If the doc compiles, then it opens in your browser and bacon switches
+# to the previous job
+[jobs.doc-open]
+command = ["cargo", "doc", "--color", "always", "--no-deps", "--open"]
+need_stdout = false
+on_success = "back"                                                    # so that we don't open the browser at each change
+
+[jobs.doc-internal]
+command = [
+    "cargo",
+    "doc",
+    "--color",
+    "always",
+    "--no-deps",
+    "--all-features",
+    "--document-private-items",
+]
+need_stdout = false
+
+[jobs.doc-internal-open]
+command = [
+    "cargo",
+    "doc",
+    "--color",
+    "always",
+    "--no-deps",
+    "--all-features",
+    "--document-private-items",
+    "--open",
+]
+need_stdout = false
+on_success = "back"
+
+# You may define here keybindings that would be specific to
+# a project, for example a shortcut to launch a specific job.
+# Shortcuts to internal functions (scrolling, toggling, etc.)
+# should go in your personal global prefs.toml file instead.
+[keybindings]
+# alt-m = "job:my-job"