Snakemakeで明示的および暗黙的なルールを表現する方法は？

Question

Snakemakeを理解するために、従来のMakefileの例をSnakemakeと比較したいと思います。私はこの記事の最後を参照して、Snakemakeファイルにこれを翻訳しようとした

# source: http://www.jfranken.de/homepages/johannes/vortraege/make_inhalt.en.html 

# Declaration of a variable 
clothes = coat shoes mobile sweater socks\ 
     trousers shirt pants undershirt 

all: $(clothes) 

# An explicit rule assigns the commands for several targets 
$(clothes): 
    @echo put on $@; touch $@ 

# Implicit rules state the prerequisites 
coat:  shoes mobile sweater 
shoes:  socks trousers 
mobile: trousers 
sweater: shirt 
trousers: pants shirt 
shirt:  undershirt 

# Additional feature 
.PHONY: naked 
naked:  ; @-rm $(clothes) 

：前提条件のための教育の例とnice introduction page to makeがあります。それは動作しますが、私はすべての記事に対してtouchコマンドを繰り返さなければなりません。私は明示的なルールと暗黙的なルール（ワイルドカードを使用）の間で区別してmakeのアプローチをコピーしようとしましたが、成功しませんでした。私の現在のものよりもエレガントな方法がありますか？ Snakemakeで

# Snakemake version of http://www.jfranken.de/homepages/johannes/vortraege/make_inhalt.en.html#ToC6 

CLOTHES = ["coat", "shoes", "mobile", "sweater", "socks", "trousers", "shirt", "pants", "undershirt"] 

rule all: 
    input: CLOTHES 

rule coat: 
    input: "shoes", "mobile", "sweater" 
    output: "coat" 
    shell: "touch coat" 

rule shoes: 
    input: "socks", "trousers" 
    output: "shoes" 
    shell: "touch shoes" 

rule mobile: 
    input: "trousers" 
    output: "mobile" 
    shell: "touch mobile" 

rule sweater: 
    input: "shirt" 
    output: "sweater" 
    shell: "touch sweater" 

rule trousers: 
    input: "pants", "shirt" 
    output: "trousers" 
    shell: "touch trousers" 

rule shirt: 
    input: "undershirt" 
    output: "shirt" 
    shell: "touch shirt" 

rule undershirt: 
    output: "undershirt" 
    shell: "touch undershirt" 

rule pants: 
    output: "pants" 
    shell: "touch pants" 

rule socks: 
    output: "socks" 
    shell: "touch socks" 


### Additional feature 

rule naked: 
    run: 
     for ds in CLOTHES: 
      shell("rm -f {}".format(ds)) 

Answer 1

、一つは、依存関係を変化させるなどのinput functionsし、設定ファイルを使用します。

configfile: "config.yaml" 


def get_prereqs(wildcards): 
    """Lookup prerequisites in config file.""" 
    # return prereqs as list of strings 
    return config["clothes"][wildcards.type] 


# target rule for creating all desired files 
rule all: 
    input: 
     config["clothes"] 


rule clothes: 
    input: 
     # refer to function that will be called with the inferred wildcards as single argument 
     get_prereqs 
    output: 
     # in general, rule output should be more specific than in this example 
     "{type}" 
    shell: 
     "touch {output}" 

そしてconfig.yaml：

clothes: 
    coat: 
    - shoes 
    - mobile 
    - sweater 
    shoes: 
    - socks 
    - trousers 
    mobile: 
    - trousers 
    sweater: 
    - shirt 
    trousers: 
    - pants 
    - shirt 
    shirt: 
    - undershirt 
    pants: [] 
    undershirt: [] 
    socks: []