Update README with usage details

README.md

@@ -2,6 +2,140 @@
 
 A labeler for GitHub issues and pull requests.
 
+```bash
+Usage:
+  labeler [OPTIONS]
+
+Application Options:
+  -o, --owner=   GitHub Owner/Org name [$GITHUB_ACTOR]
+  -r, --repo=    GitHub Repo name [$GITHUB_REPO]
+  -t, --type=    The target event type to label (issues or pull_request) [$GITHUB_EVENT_NAME]
+      --id=      The integer id of the issue or pull request
+      --data=    A JSON string of the 'event' type (issue event or pull request event)'
+  -v, --version  Display version information
+
+Help Options:
+  -h, --help     Show this help message
+```
+
+Example usage:
+```bash
+export GITHUB_TOKEN=yourtoken
+./labeler -o jimschubert -r labeler -type pull_request -id 1
+```
+
+This will evaluate the configuration file for the repository and apply any relevant labels to PR #1.
+
+## Configuration
+
+The configuration file must be located in the target repository at `.github/labeler.yml`, and the contents must follow either the *simple* schema or the *full* schema.
+
+Feel free to use one of the following schema examples to get started. 
+
+### Simple Schema
+
+```yaml
+# labeler "simple" schema
+# Comment is applied to both issues and pull requests.
+# If you need a more robust solution, consider the "full" schema.
+comment: |
+  👍 Thanks for this!
+  🏷 I have applied any labels matching special text in your issue.
+
+  Please review the labels and make any necessary changes.
+
+# Labels is an object where:
+# - keys are labels
+# - values are array of string patterns to match against title + body in issues/prs
+labels:
+  'bug':
+    - '\bbug[s]?\b'
+  'help wanted':
+    - '\bhelp( wanted)?\b'
+  'duplicate':
+    - '\bduplicate\b'
+    - '\bdupe\b'
+  'enhancement':
+    - '\benhancement\b'
+  'question':
+    - '\bquestion\b'
+```
+
+### Full Schema
+
+```yaml
+# labeler "full" schema
+
+# enable labeler on issues, prs, or both.
+enable:
+  issues: true
+  prs: true
+# comments object allows you to specify a different message for issues and prs
+
+comments:
+  issues: |
+    Thanks for opening this issue!
+    I have applied any labels matching special text in your title and description.
+
+    Please review the labels and make any necessary changes.
+  prs: |
+    Thanks for the contribution!
+    I have applied any labels matching special text in your title and description.
+
+    Please review the labels and make any necessary changes.
+
+# Labels is an object where:
+# - keys are labels
+# - values are objects of { include: [ pattern ], exclude: [ pattern ] }
+#    - pattern must be a valid regex, and is applied globally to
+#      title + description of issues and/or prs (see enabled config above)
+#    - 'include' patterns will associate a label if any of these patterns match
+#    - 'exclude' patterns will ignore this label if any of these patterns match
+labels:
+  'bug':
+    include:
+      - '\bbug[s]?\b'
+    exclude: []
+  'help wanted':
+    include:
+      - '\bhelp( me)?\b'
+    exclude:
+      - '\b\[test(ing)?\]\b'
+  'enhancement':
+    include:
+      - '\bfeat\b'
+    exclude: []
+
+```
+
+## Build
+
+Build a local distribution for evaluation using goreleaser.
+
+```bash
+goreleaser release --skip-publish --snapshot --rm-dist
+```
+
+This will create an executable application for your os/architecture under `dist`:
+
+```
+dist
+├── labeler_darwin_amd64
+│   └── labeler
+├── labeler_linux_386
+│   └── labeler
+├── labeler_linux_amd64
+│   └── labeler
+├── labeler_linux_arm64
+│   └── labeler
+├── labeler_linux_arm_6
+│   └── labeler
+└── labeler_windows_amd64
+    └── labeler.exe
+```
+
 ## License
 
 The labeler project is licensed under Apache 2.0
+
+*labeler* is a rewrite of an earlier GitHub App I wrote (see [auto-labeler](https://github.com/jimschubert/auto-labeler)). I've rewritten that app to replace the license while making the tool reusable across CI tools and operating systems.

docs/samples/full.yml

@@ -1,6 +1,6 @@
-# auto-labeler "full" schema
+# labeler "full" schema
 
-# enable auto-labeler on issues, prs, or both.
+# enable labeler on issues, prs, or both.
 enable:
   issues: true
   prs: true

docs/samples/simple.yml

@@ -1,4 +1,4 @@
-# auto-labeler "simple" schema
+# labeler "simple" schema
 # Comment is applied to both issues and pull requests.
 # If you need a more robust solution, consider the "full" schema.
 comment: |

labeler.go

@@ -205,7 +205,7 @@ func (l *Labeler) addComment(comment *string) error {
 }
 
 func newComment(comment string) *string {
-	fullComment := fmt.Sprintf("<!-- Labaler (https://github.com/jimschubert/labeler) -->\n%s", comment)
+	fullComment := fmt.Sprintf("<!-- Labeler (https://github.com/jimschubert/labeler) -->\n%s", comment)
 	return &fullComment
 }