From fc7584ca1ccf726f8d1c9822ed5fa90230da006e Mon Sep 17 00:00:00 2001
From: Rosiney Gomes Pereira <rosiney.gp@gmail.com>
Date: Wed, 26 May 2021 21:06:49 -0300
Subject: [PATCH] feat: list makefiles targets

---
 .mkdkr    |  6 ++++++
 README.md | 48 ++++++++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 54 insertions(+)

diff --git a/.mkdkr b/.mkdkr
index ebb666d..ee4ae5f 100755
--- a/.mkdkr
+++ b/.mkdkr
@@ -256,6 +256,12 @@ define dkr =
   trap _job_destroy EXIT
   _pretty "orange" "\nstart: \$(@)\n"
 endef
+
+.PHONY: _list
+_list:
+	@FILTER="^[a-zA-Z_]([a-zA-Z0-9\_\/\.\-])+?:((\ [a-zA-Z][a-zA-Z0-9\_\/\.\-]+)?)+\$\$"
+	make -qp 2> /dev/null | grep -E "\$\$FILTER" | grep -v -E '(Makefile|_list)' | sort -u
+
 EOF
 }
 
diff --git a/README.md b/README.md
index bf65c5d..b102319 100644
--- a/README.md
+++ b/README.md
@@ -65,6 +65,8 @@ Table of contents
 	- [Implicit](#implicit)
 	- [mkdkr.csv](#mkdkrcsv)
 	- [Collection](#collection)
+- [Builtin Targets](#builtin-targets)
+	- [_list](#_list)
 - [Helpers](#helpers)
 - [Examples](#examples)
 	- [Simple](#simple)
@@ -561,6 +563,52 @@ The file contains four values per line in following order
 
 > Small collection, use it as example
 
+# Builtin Targets
+
+## _list
+
+List all targets in `Makefile`, include extensions.
+
+```shell
+$ make _list
+
+include
+
+alias: exporter, repos: https://github.com/rosineygp/mkdkr_exporter.git, checkout: v1.5.0, file: main.mk
+
+replace: MKDKR_EXPORTER_TAG=latest to v1.5.0
+bash.v4-0:
+bash.v4-1:
+bash.v4-2:
+bash.v4-3:
+bash.v4-4:
+bash.v5-0:
+_coverage.report:
+examples.dind:
+examples.escapes:
+examples.pipeline:
+examples.retry:
+examples.service:
+examples.shell:
+examples.simple:
+examples.stdout:
+_exporter_bitbucket-pipelines:
+_exporter_circle-ci:
+_exporter_github:
+_exporter_gitlab-ci:
+_exporter_jenkins_pipeline:
+_exporter_shell:
+_exporter_travis:
+lint.commit:
+lint.hadolint:
+lint.shellcheck:
+test.unit:
+```
+
+> The result are sorted by name.
+> 
+> First char target name: [a-zA-Z_]
+
 # Helpers
 
 A set of small functions to common pipelines process.