[lang_en]If you, like me, strive to keep a well organized and modular configuration setup, sooner or later will split your bash configuration into multiple files. And if you want it to be valid for multiple machines you’ll appreciate the following function:[\/lang_en][lang_pt]Se, como eu, sempre tenta organizar e ter uma configura\u00e7\u00e3o modular, mais cedo ou mais tarde vai separar a configura\u00e7\u00e3o bash em v\u00e1rios ficheiros. Al\u00e9m disso, se quiser usar a mesma em v\u00e1rias m\u00e1quinas, esta fun\u00e7\u00e3o d\u00e1 jeito:[\/lang_pt]<\/p>\n
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\n for<\/span> i_; do<\/span> test<\/span> -f<\/span> "$i_<\/span>"<\/span> &&<\/span> source<\/span> "$i_<\/span>"<\/span>; done<\/span>
\n}<\/span><\/div><\/td><\/tr><\/tbody><\/table><\/div>\n\n<\/pre>\n[lang_en]This way, you can try to process other configuration fragments only when they exist:[\/lang_en][lang_pt]Desta forma pode tentar incluir os fragmentos apenas onde e quando existem:[\/lang_pt]<\/p>\n
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<\/div><\/td>[lang_en]Another common need for bash configuration is to either append or prepend paths to an environment variable. When doing a configuration for multiple machines it is always a pain to make sure those paths exist. These functions take care of that making adding directories to the path a breeze:[\/lang_en][lang_pt]Algo que tamb\u00e9m \u00e9 comum fazer \u00e9 acrescentar um direct\u00f3rio a uma vari\u00e1vel de ambiente. Quando se faz uma configura\u00e7\u00e3o para v\u00e1rias m\u00e1quina \u00e9 sempre um inconveniente assegurar que os direct\u00f3rios existem. Estas fun\u00e7\u00f5es tratam do problema:[\/lang_pt]<\/p>\n
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\n VAR<\/span>=$1<\/span>
\n shift<\/span>
\n VAL<\/span>=$(<\/span>eval<\/span> echo<\/span> \\$${VAR}<\/span>)<\/span>
\n for<\/span> i_; do<\/span>
\n test<\/span> -d<\/span> "$i_<\/span>"<\/span> &&<\/span> VAL<\/span>=$i_<\/span>${VAL:+":$VAL"}<\/span>
\n done<\/span>
\n eval<\/span> export<\/span> ${VAR}<\/span>=$(<\/span>echo<\/span> ${VAL}<\/span>)<\/span>
\n}<\/span>
\n
\nsafe_append_path(<\/span>)<\/span> {<\/span>
\n VAR<\/span>=$1<\/span>
\n shift<\/span>
\n VAL<\/span>=$(<\/span>eval<\/span> echo<\/span> \\$${VAR}<\/span>)<\/span>
\n for<\/span> i_; do<\/span>
\n test<\/span> -d<\/span> "$i_<\/span>"<\/span> &&<\/span> VAL<\/span>=${VAL:+"$VAL:"}<\/span>$i_<\/span>
\n done<\/span>
\n eval<\/span> export<\/span> ${VAR}<\/span>=$(<\/span>echo<\/span> ${VAL}<\/span>)<\/span>
\n}<\/span><\/div><\/td><\/tr><\/tbody><\/table><\/div>\n\n<\/pre>\n[lang_en]Example:[\/lang_en][lang_pt]Exemplos:[\/lang_pt]<\/p>\n
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\nsafe_append_path MANPATH \/<\/span>opt\/<\/span>local\/<\/span>man<\/span> ${HOME}<\/span>\/<\/span>man<\/span><\/div><\/td><\/tr><\/tbody><\/table><\/div>\n\n<\/pre>\n[lang_en]Also, it is not unusual to have some path variables with duplicate entries, which is not very efficient. This function makes sure that a path only occurs once, and retains only the first occurrence, thus keeping the search order intact.[\/lang_en][lang_pt]\u00c9 frequente que as vari\u00e1veis de ambiente com direct\u00f3rios apresentem entradas duplicadas o que torna a pesquisa menos eficiente. Esta fun\u00e7\u00e3o assegura que cada direct\u00f3rio ocorre apenas uma vez e retem apenas a primeira entrada, mantendo por isso a ordem.[\/lang_pt]<\/p>\n
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\n eval<\/span> export<\/span> $1<\/span>=$(<\/span>echo<\/span> $(<\/span>eval<\/span> echo<\/span> \\$${1}<\/span>)<\/span> |<\/span> \\
\n awk<\/span> -F: \\
\n '{ a[$1]; \\
\n printf "%s",$1; \\
\n for(i=2;i<=NF;i++) { \\
\n if(!($i in a)) { \\
\n printf ":%s",$i; \\
\n }; \\
\n a[$i]; \\
\n }; \\
\n printf "\\n"; \\
\n }'<\/span>)<\/span>
\n}<\/span><\/div><\/td><\/tr><\/tbody><\/table><\/div>\n\n<\/pre>\n[lang_en]Example:[\/lang_en][lang_pt]Examples:[\/lang_pt]<\/p>\n
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\nunique_path MANPATH<\/div><\/td><\/tr><\/tbody><\/table><\/div>\n\n<\/pre>\n","protected":false},"excerpt":{"rendered":"[lang_en]If you, like me, strive to keep a well organized and modular configuration setup, sooner or later will split your bash configuration into multiple files. And if you want it to be valid for multiple machines you’ll appreciate the following function:[\/lang_en][lang_pt]Se, como eu, sempre tenta organizar e ter uma configura\u00e7\u00e3o modular, mais cedo ou mais […]<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[8,62],"tags":[],"jetpack_sharing_enabled":true,"jetpack_featured_media_url":"","jetpack_shortlink":"https:\/\/wp.me\/pmzAM-8p","_links":{"self":[{"href":"https:\/\/www.triatlantico.org\/blog\/wp-json\/wp\/v2\/posts\/521"}],"collection":[{"href":"https:\/\/www.triatlantico.org\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.triatlantico.org\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.triatlantico.org\/blog\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/www.triatlantico.org\/blog\/wp-json\/wp\/v2\/comments?post=521"}],"version-history":[{"count":31,"href":"https:\/\/www.triatlantico.org\/blog\/wp-json\/wp\/v2\/posts\/521\/revisions"}],"predecessor-version":[{"id":1767,"href":"https:\/\/www.triatlantico.org\/blog\/wp-json\/wp\/v2\/posts\/521\/revisions\/1767"}],"wp:attachment":[{"href":"https:\/\/www.triatlantico.org\/blog\/wp-json\/wp\/v2\/media?parent=521"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.triatlantico.org\/blog\/wp-json\/wp\/v2\/categories?post=521"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.triatlantico.org\/blog\/wp-json\/wp\/v2\/tags?post=521"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}