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コマンドライン引数の追加

コマンドライン引数

make2help ${TARGET_NAME} でそのターゲットのヘルプのみを表示する

${TSRGET_NAME} が定義されていない場合は定義されていないとエラーメッセージを表示。

コマンドラインオプション

実装したいオプションは下記

  • -f, --file: Makefile へのパスを指定
  • -a, --all: すべてのターゲットのヘルプを表示
  • -t, --target-only: ターゲットのみを一覧で表示

依存関係のあるファイルについては `:` のあとを表示しないようにする 

## Show target list
help:
	@python make2help.py
## sample target
target1:
	@echo "This is sample target."
## Shoe content in `foo,txt`
target2: foo.txt
	@cat foo.txt

現在は出力は下記になる。

$ make
help:	Show target list
target1:	sample target
target2: foo.tx:	Shoe content in `foo,txt`

実際に期待している出力は下記

help:	Show target list
target1:	sample target
target2: 	Shoe content in `foo,txt`

ターゲット以外も表示されてしまっている 

.DEFAULT_GOAL := help
## install this command
install:
        python3 setup.py install
## install for development
develop:
        python3 setup.py develop
## exec unit test
test: tests/test_make2help.py
        python3 -m unittest tests/test_make2help.py
## Show target list
help:
        @make2help

.PHONY: install develop test help

上記の Makefile で make help すると下記が起こる

.DEFAULT_GOAL :
install:        install this command
develop:        install for development
test:   exec unit test
help:   Show target list
.PHONY:

.PHONY や .DEFAULT_GOAL を外す必要がある

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