{"id":275,"date":"2018-07-08T12:49:08","date_gmt":"2018-07-08T11:49:08","guid":{"rendered":"http:\/\/sizious.com\/fr\/?p=275"},"modified":"2018-09-26T11:18:55","modified_gmt":"2018-09-26T10:18:55","slug":"apache-maven-comment-extraire-les-valeurs-des-noeuds-xml-depuis-le-fichier-pom-xml-en-pur-batch","status":"publish","type":"post","link":"https:\/\/sizious.com\/fr\/2018\/07\/08\/apache-maven-comment-extraire-les-valeurs-des-noeuds-xml-depuis-le-fichier-pom-xml-en-pur-batch\/","title":{"rendered":"Apache Maven : Comment extraire les valeurs des noeuds XML depuis le fichier pom.xml (en pur batch !)"},"content":{"rendered":"

Si vous \u00eates un d\u00e9veloppeur Java<\/strong> vous connaissez tr\u00e8s certainement Apache Maven<\/a>, qui est \u00e0 peu pr\u00e8s l’\u00e9quivalent de Make<\/span>\u00a0mais pour le monde Java<\/strong>.<\/p>\n

Il y a quelques jours j’ai d\u00fb r\u00e9fl\u00e9chir \u00e0 une m\u00e9thode d’extraction des valeurs de certains n\u0153uds du fichier pom.xml<\/span>\u00a0pour automatiser certaines op\u00e9rations. Par exemple, j’ai voulu extraire les valeurs de groupId<\/span>, artifactId<\/span> et version<\/span> depuis un projet Maven<\/strong>, c’est-\u00e0-dire depuis le fichier pom.xml<\/span>.<\/p>\n

J’ai finalement cr\u00e9\u00e9 une solution en pur batch Windows<\/strong> pour le faire, et j’ai appel\u00e9 ce petit outil POM Tool<\/strong>.<\/p>\n

Et voici son code source :<\/p>\n

@echo off\r\nsetlocal EnableDelayedExpansion\r\nset POM_TOOL_VERSION=20180914\r\n\r\nrem Parameters\r\nset MAVEN_POM_INPUT_TAG=%1\r\nset MAVEN_POM_FILE=pom.xml\r\nif \"%2\" neq \"\" set MAVEN_POM_FILE=%2\r\n\r\nrem Check input parameters\r\nif \"%MAVEN_POM_INPUT_TAG%\"==\"\" goto help\r\nif \"%MAVEN_POM_FILE%\"==\"\" goto error_pom_not_found\r\nif not exist %MAVEN_POM_FILE% goto error_pom_not_found\r\n\r\nrem Compute start\/end positions to extract the value from the XML tag\r\ncall:strlen %MAVEN_POM_INPUT_TAG%\r\nset \/a TAG_BEGIN=%_strlen% + 2\r\nset \/a TAG_END=(%TAG_BEGIN% + 1) * -1\r\n\r\nrem Perform the XML tag value extraction\r\ncall:extractxml %MAVEN_POM_INPUT_TAG% %TAG_BEGIN% %TAG_END%\r\nif \"%_extractxml%\"==\"\" goto error_extraction_failed\r\necho %_extractxml%\r\ngoto:eof\r\n\r\n::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::\r\n\r\nrem ---\r\nrem Display help message\r\nrem ---\r\n:help\r\ncall:banner\r\necho Usage: %~n0 ^<xml_tag^> [pom_file]\r\necho.\r\necho Example: %~n0 version - will return artifact version\r\necho          %~n0 groupId - will return artifact groupId\r\ngoto:eof\r\n\r\nrem ---\r\nrem Error: The requested tag was not found\r\nrem ---\r\n:error_extraction_failed\r\ncall:banner\r\necho Error: The tag \"%MAVEN_POM_INPUT_TAG%\" wasn't found in the \"%MAVEN_POM_FILE%\" file.\r\ngoto:eof\r\n\r\nrem ---\r\nrem Error: The Maven POM file wasn't found\r\nrem ---\r\n:error_pom_not_found\r\ncall:banner\r\necho Error: The \"%MAVEN_POM_FILE%\" file wasn't found.\r\ngoto:eof\r\n\r\nrem ---\r\nrem Function: banner\r\nrem Used to display the tool banner\r\nrem ---\r\n:banner\r\necho POM Tool - Ver. %POM_TOOL_VERSION%\r\necho.\r\ngoto:eof\r\n\r\nrem ---\r\nrem Function: extractxml \r\nrem Used to parse %MAVEN_POM_FILE% for extracting tags value.\r\nrem Usage: call:extractxml %param% where %param% is the tag to search.\r\nrem ---\r\n:extractxml\r\nsetlocal\r\nset _extracted_xml_result=\r\nset _token=^<%~1^>\r\nset _begin=%~2\r\nset _end=%~3\r\nfor \/f \"tokens=*\" %%a in (%MAVEN_POM_FILE%) do (\r\n\tset row=%%a\r\n\tif \/i \"!row:%_token%=!\"==\"!row!\" (echo NOP > nul) else (\r\n\t\tset _extracted_xml_result=!row!\r\n\t\tif \/i \"!_extracted_xml_result!\" neq \"\" goto extractxml_endloop\r\n\t)\r\n)\r\n:extractxml_endloop\r\nset \"_final=%_extracted_xml_result%\"\r\nif \"%_final%\" neq \"\" call set _final=%%_final:~%_begin%,%_end%%%\r\n(endlocal\r\n\tif \"%~1\" neq \"\" set \"_extractxml=%_final%\"\r\n)\r\ngoto:eof\r\n\r\nrem ---\r\nrem Function: strlen\r\nrem Get the length of a string\r\nrem Thanks to: SS64 (https:\/\/ss64.com\/nt\/syntax-strlen.html)\r\nrem ---\r\n:strlen\r\nsetlocal\r\nset _str=%~1\r\n\r\nrem Remove any quotes\r\nset _str=%_str:\"=%\r\n\r\nrem Test if empty\r\nif not defined _str echo endlocal & set _strlen=0&goto:eof\r\n\r\nset MAX_STRING_LENGTH=256\r\nfor \/l %%g in (0,1,!MAX_STRING_LENGTH!) do (\r\n\tREM extract one character\r\n\tset \"_char=!_str:~%%g,1!\"\r\n\tREM if _char is empty we are at the end of the string\r\n\tif not defined _char endlocal & set _strlen=%%g& goto:eof\r\n)\r\ngoto:eof\r\n<\/pre>\n
Vous devez simplement copier\/coller ce code source dans un nouveau fichier texte et l’appeler pomtool.cmd<\/span>.<\/p>\n
L’utilisation est tr\u00e8s simple :<\/p>\n
pomtool artifactId c:\\temp\\my-maven-project\\pom.xml<\/pre>\n
Ceci va vous donner la valeur du n\u0153ud artifactId<\/span>\u00a0du fichier\u00a0c:\\temp\\my-maven-project\\pom.xml<\/span> !<\/p>\n
Bien entendu vous pouvez appeler POM Tool<\/strong> depuis un autre fichier batch, par exemple :<\/p>\n
@echo off\r\nfor \/f \"tokens=*\" %%i in ('pomtool description c:\\my\\project\\pom.xml') do set \"PROJECT_NAME=%%i\"\r\necho %PROJECT_NAME%\r\npause<\/pre>\n
Dans ce cas, la variable %PROJECT_NAME%<\/span>\u00a0contiendra la sortie du programme POM Tool<\/strong>, dans cet exemple il s’agit de la valeur du n\u0153ud description du fichier pom.xml<\/span> ! \ud83d\ude42<\/p>\n
N’h\u00e9sitez pas \u00e0 commenter si vous avez des questions ! \ud83d\ude42<\/p>\n","protected":false},"excerpt":{"rendered":"
Si vous \u00eates un d\u00e9veloppeur Java vous connaissez tr\u00e8s certainement Apache Maven, qui est \u00e0 peu pr\u00e8s l’\u00e9quivalent de Make\u00a0mais pour le monde Java. Il y a quelques jours j’ai d\u00fb r\u00e9fl\u00e9chir \u00e0 une m\u00e9thode d’extraction des valeurs de certains n\u0153uds du fichier pom.xml\u00a0pour automatiser certaines op\u00e9rations. Par exemple, j’ai voulu extraire les valeurs de\u2026 Lire la suite »<\/a><\/span><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_monsterinsights_skip_tracking":false,"_monsterinsights_sitenote_active":false,"_monsterinsights_sitenote_note":"","_monsterinsights_sitenote_category":0,"footnotes":""},"categories":[5],"tags":[],"class_list":["post-275","post","type-post","status-publish","format-standard","hentry","category-code"],"aioseo_notices":[],"_links":{"self":[{"href":"https:\/\/sizious.com\/fr\/wp-json\/wp\/v2\/posts\/275","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/sizious.com\/fr\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/sizious.com\/fr\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/sizious.com\/fr\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/sizious.com\/fr\/wp-json\/wp\/v2\/comments?post=275"}],"version-history":[{"count":6,"href":"https:\/\/sizious.com\/fr\/wp-json\/wp\/v2\/posts\/275\/revisions"}],"predecessor-version":[{"id":290,"href":"https:\/\/sizious.com\/fr\/wp-json\/wp\/v2\/posts\/275\/revisions\/290"}],"wp:attachment":[{"href":"https:\/\/sizious.com\/fr\/wp-json\/wp\/v2\/media?parent=275"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/sizious.com\/fr\/wp-json\/wp\/v2\/categories?post=275"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/sizious.com\/fr\/wp-json\/wp\/v2\/tags?post=275"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}