docs: add recipe help example

docs/examples/Makefile

@@ -1,7 +1,7 @@
 MAKEFLAGS += --no-print-directory
 COLS ?= 60
 ROWS ?= 20
-EXAMPLES := check embedded
+EXAMPLES := check embedded recipe-help
 CASTS := $(addsuffix /demo.cast, $(EXAMPLES))
 
 all: $(CASTS)

docs/examples/index.md

@@ -1,10 +1,14 @@
 # Examples
 
 
-[`Check`](./check)
+[Confirm](./check)
 
 : Perform a basic confirmation test with the user and exit with error code 1 if input is N/n.
 
-[`Embedded`](./embedded)
+[Embedded Scripts](./embedded)
 
 : Use the builtin functions to write multi-line python/bash scripts directly in your `Makefile`
+
+[Recipe Help](./recipe-help)
+
+: Display the target, docstring and recipe for a given target then exit.

docs/examples/recipe-help/demo.cast

@@ -0,0 +1,139 @@
+{"version": 2, "width": 60, "height": 20, "timestamp": 1664059901, "env": {"SHELL": "/usr/bin/zsh", "TERM": "xterm-256color"}}
+[0.008451, "o", "\u001b[H\u001b[2J\u001b[3J"]
+[0.008952, "o", "bash >> "]
+[0.009359, "o", "ma"]
+[0.189924, "o", "ke"]
+[0.280056, "o", " -"]
+[0.370134, "o", "f "]
+[0.460177, "o", "re"]
+[0.550458, "o", "ci"]
+[0.640486, "o", "pe"]
+[0.730615, "o", "-h"]
+[0.820777, "o", "el"]
+[0.910842, "o", "p/"]
+[1.091156, "o", "re"]
+[1.181306, "o", "ci"]
+[1.271522, "o", "pe"]
+[1.361548, "o", "-h"]
+[1.451772, "o", "el"]
+[1.542044, "o", "p."]
+[1.631969, "o", "mk"]
+[1.722108, "o", " h"]
+[1.812243, "o", "el"]
+[1.992584, "o", "p\r\n"]
+[3.024383, "o", "\u001b[1;36musage:\u001b[0m\r\n\tmake <recipe>\r\n\tmake help <recipe>\r\n\r\n\u001b[1;33m  deps-only\u001b[0m │ \u001b[2ma task/target with dependencies\u001b[0m\r\n\u001b[1;33m        foo\u001b[0m │ \u001b[2ma dummy rule that depends on the local files\u001b[0m\r\n\u001b[1;33m    h, help\u001b[0m │ \u001b[2mshow this help\u001b[0m\r\n\r\n"]
+[5.031848, "o", "\u001b[H\u001b[2J\u001b[3Jbash >> "]
+[5.033617, "o", "ma"]
+[5.214025, "o", "ke"]
+[5.304303, "o", " -"]
+[5.394401, "o", "f "]
+[5.484589, "o", "re"]
+[5.574811, "o", "ci"]
+[5.66483, "o", "pe"]
+[5.755019, "o", "-h"]
+[5.84516, "o", "el"]
+[5.93541, "o", "p/"]
+[6.115387, "o", "re"]
+[6.205505, "o", "ci"]
+[6.295713, "o", "pe"]
+[6.385951, "o", "-h"]
+[6.476085, "o", "el"]
+[6.566208, "o", "p."]
+[6.656285, "o", "mk"]
+[6.746562, "o", " h"]
+[6.836615, "o", "el"]
+[7.016942, "o", "p "]
+[7.106926, "o", "he"]
+[7.19701, "o", "lp"]
+[7.287225, "o", "\r\n"]
+[8.317848, "o", "\u001b[1;36mtask.mk recipe help\u001b[0m\r\n\r\n"]
+[8.324713, "o", "  \u001b[1;33mh help\u001b[0m\r\n\u001b[38m  ────────────────────────────────────────────────────────\u001b[0m\r\n  $(call py,help_py) || { echo \"exiting early!\"; exit 1; }\r\n\r\n"]
+[8.328735, "o", "exiting early!\r\n"]
+[8.328871, "o", "make[1]: *** [/home/daylin/dev/github/mine/task.mk/task.mk:30: help] Error 1\r\n"]
+[10.331577, "o", "\u001b[H\u001b[2J\u001b[3J"]
+[10.331816, "o", "bash >> "]
+[10.333573, "o", "ma"]
+[10.514271, "o", "ke"]
+[10.604555, "o", " -"]
+[10.694653, "o", "f "]
+[10.784848, "o", "re"]
+[10.87526, "o", "ci"]
+[10.965322, "o", "pe"]
+[11.055364, "o", "-h"]
+[11.145456, "o", "el"]
+[11.23557, "o", "p/"]
+[11.415828, "o", "re"]
+[11.505942, "o", "ci"]
+[11.596096, "o", "pe"]
+[11.68623, "o", "-h"]
+[11.776544, "o", "el"]
+[11.866685, "o", "p."]
+[11.95676, "o", "mk"]
+[12.046838, "o", " h"]
+[12.136847, "o", "el"]
+[12.317252, "o", "p "]
+[12.407456, "o", "de"]
+[12.497528, "o", "ps"]
+[12.587592, "o", "-o"]
+[12.677666, "o", "nl"]
+[12.767817, "o", "y\r\n"]
+[13.818205, "o", "\u001b[1;36mtask.mk recipe help\u001b[0m\r\n\r\n"]
+[13.827472, "o", "\u001b[1;33m  deps-only\u001b[0m │ \u001b[2ma task/target with dependencies\u001b[0m\r\n  \u001b[38mdeps\u001b[0m: \u001b[2mfoo\u001b[0m\r\n\r\n"]
+[13.832182, "o", "exiting early!\r\n"]
+[13.83243, "o", "make[1]: *** [/home/daylin/dev/github/mine/task.mk/task.mk:30: help] Error 1\r\n"]
+[15.835429, "o", "\u001b[H\u001b[2J\u001b[3J"]
+[15.83575, "o", "bash >> "]
+[15.837618, "o", "ma"]
+[16.018125, "o", "ke"]
+[16.108476, "o", " -"]
+[16.198731, "o", "f "]
+[16.289003, "o", "re"]
+[16.379138, "o", "ci"]
+[16.469105, "o", "pe"]
+[16.559388, "o", "-h"]
+[16.649374, "o", "el"]
+[16.739538, "o", "p/"]
+[16.919813, "o", "re"]
+[17.009951, "o", "ci"]
+[17.100097, "o", "pe"]
+[17.19021, "o", "-h"]
+[17.280433, "o", "el"]
+[17.370612, "o", "p."]
+[17.460651, "o", "mk"]
+[17.550888, "o", " h"]
+[17.641021, "o", "el"]
+[17.821304, "o", "p "]
+[17.911452, "o", "fo"]
+[18.001558, "o", "o\r\n"]
+[19.029965, "o", "\u001b[1;36mtask.mk recipe help\u001b[0m\r\n\r\n"]
+[19.039573, "o", "\u001b[1;33m  foo\u001b[0m │ \u001b[2ma dummy rule that depends on the local files\u001b[0m\r\n  \u001b[38mdeps\u001b[0m: \u001b[2mcheck embedded functions.sh index.md Makefile recipe-help\u001b[0m\r\n\u001b[38m  ────────────────────────────\u001b[0m\r\n  @echo 'this is a dummy rule'\r\n\r\n"]
+[19.044473, "o", "exiting early!\r\n"]
+[19.044637, "o", "make[1]: *** [/home/daylin/dev/github/mine/task.mk/task.mk:30: help] Error 1\r\n"]
+[21.047851, "o", "\u001b[H\u001b[2J\u001b[3J"]
+[21.048155, "o", "bash >> "]
+[21.050062, "o", "ma"]
+[21.230577, "o", "ke"]
+[21.320832, "o", " -"]
+[21.410896, "o", "f "]
+[21.501092, "o", "re"]
+[21.591208, "o", "ci"]
+[21.681347, "o", "pe"]
+[21.77147, "o", "-h"]
+[21.861573, "o", "el"]
+[21.951884, "o", "p/"]
+[22.13224, "o", "re"]
+[22.222235, "o", "ci"]
+[22.312372, "o", "pe"]
+[22.40265, "o", "-h"]
+[22.49285, "o", "el"]
+[22.582874, "o", "p."]
+[22.672961, "o", "mk"]
+[22.763162, "o", " h"]
+[22.853371, "o", "el"]
+[23.033526, "o", "p "]
+[23.123576, "o", "ba"]
+[23.214792, "o", "r\r\n"]
+[24.264812, "o", "\u001b[1;36mtask.mk recipe help\u001b[0m\r\n\r\n"]
+[24.271227, "o", "  \u001b[1;33mbar\u001b[0m\r\n\u001b[38m  ─────────────────────────────────────\u001b[0m\r\n  @echo 'some rule with no help string'\r\n\r\n"]
+[24.275046, "o", "exiting early!\r\n"]
+[24.275205, "o", "make[1]: *** [/home/daylin/dev/github/mine/task.mk/task.mk:30: help] Error 1\r\n"]

docs/examples/recipe-help/index.md

@@ -0,0 +1,12 @@
+---
+asciinema: true
+---
+
+# Recipe Help
+
+<div id="demo-cast"></div>
+
+```make title="recipe-help.mk"
+--8<-- "docs/examples/recipe-help/recipe-help.mk"
+```
+

docs/examples/recipe-help/recipe-help.mk

@@ -0,0 +1,24 @@
+## deps-only | a task/target with dependencies
+.PHONY: deps-only
+deps-only: foo
+
+## foo | a dummy rule that depends on the local files
+.PHONY: foo
+foo: $(wildcard *)
+	@echo 'this is a dummy rule'
+
+# bar but no docstring
+.PHONY: bar
+bar:
+	@echo 'some rule with no help string'
+
+define USAGE
+{a.header}usage:{a.end}
+	make <recipe>
+	make help <recipe>
+
+endef
+
+.DEFAULT_GOAL = help
+include $(shell git rev-parse --show-toplevel)/task.mk
+

docs/examples/recipe-help/record.sh

@@ -0,0 +1,11 @@
+#!/usr/bin/env bash
+
+source "$(dirname "${BASH_SOURCE[0]}")/../functions.sh"
+
+cmd 'make -f recipe-help/recipe-help.mk help'
+cmd 'make -f recipe-help/recipe-help.mk help help'
+cmd 'make -f recipe-help/recipe-help.mk help deps-only'
+cmd 'make -f recipe-help/recipe-help.mk help foo'
+cmd 'make -f recipe-help/recipe-help.mk help bar'
+
+sleep 1

task.mk

@@ -1,7 +1,7 @@
 # }> [github.com/daylinmorgan/task.mk] <{ #
 # Copyright (c) 2022 Daylin Morgan
 # MIT License
-# version: v22.9.19-13-g63eb8ac-dev
+# version: v22.9.19-17-gd6bd8a0-dev
 #
 # task.mk should be included at the bottom of your Makefile with `-include .task.mk`
 # See below for the standard configuration options that should be set prior to including this file.
@@ -15,6 +15,7 @@ MSG_STYLE ?= faint
 DIVIDER ?= ─
 DIVIDER_STYLE ?= default
 HELP_SEP ?= │
+WRAP ?= 100
 # python f-string literals
 EPILOG ?=
 USAGE ?={ansi.header}usage{ansi.end}:\n  make <recipe>\n
@@ -50,7 +51,8 @@ tconfirm = $(call py,confirm_py,$(1))
 _update-task.mk:
 	$(call tprint,{a.b_cyan}Updating task.mk{a.end})
 	curl https://raw.githubusercontent.com/daylinmorgan/task.mk/main/task.mk -o .task.mk
-export MAKEFILE_LIST MAKE
+TASK_MAKEFILE_LIST := $(filter-out $(word $(words $(MAKEFILE_LIST)),$(MAKEFILE_LIST)),$(MAKEFILE_LIST))
+export MAKEFILE_LIST MAKE TASK_MAKEFILE_LIST
 ifndef INHERIT_SHELL
 SHELL := $(shell which bash)
 endif
@@ -138,13 +140,17 @@ def recipe_help_header(goal):
         return f"  {ansi.style(goal,'goal')}"
 def get_goal_deps(goal="task.mk"):
     make = os.getenv("MAKE", "make")
-    database = subprocess.check_output([make, "-p", "-n"], universal_newlines=True)
+    cmd = [make, "-p", "-n", "-i"]
+    for file in os.getenv("TASK_MAKEFILE_LIST", "").split():
+        cmd.extend(["-f", file])
+    database = subprocess.check_output(cmd, universal_newlines=True)
     dep_pattern = re.compile(r"^" + goal + ":(.*)?")
     for line in database.splitlines():
         match = dep_pattern.search(line)
         if match and match.groups()[0]:
             return wrap(
                 f"{ansi.style('deps','default')}: {ansi.style(match.groups()[0].strip(),'msg')}",
+                width=cfg.wrap,
                 initial_indent="  ",
                 subsequent_indent="  ",
             )
@@ -224,11 +230,11 @@ def print_arg_help(help_args):
     print(f"{ansi.style('task.mk recipe help','header')}\n")
     for arg in help_args.split():
         print("\n".join(parse_goal(gen_makefile(), arg)))
+    print()
 def main():
     help_args = os.getenv("HELP_ARGS")
     if help_args:
         print_arg_help(help_args)
-        print(ansi.faint)
         sys.exit(1)
     else:
         print_help()
@@ -284,6 +290,7 @@ class Config:
     sep: str
     epilog: str
     usage: str
+    wrap: int
 color2byte = dict(
     black=0,
     red=1,
@@ -364,5 +371,6 @@ class Ansi:
         else:
             return f"{self.__dict__[style]}{text}{self.__dict__['end']}"
 a = ansi = Ansi()
-cfg = Config("$(DIVIDER)", "$(HELP_SEP)", f"""$(EPILOG)""", f"""$(USAGE)""")
+cfg = Config(
+    "$(DIVIDER)", "$(HELP_SEP)", f"""$(EPILOG)""", f"""$(USAGE)""",int('$(WRAP)'))
 endef