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Specification for linking Git with issue trackers
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Git Bugtraq Configuration specification ======================================= Version 0.4, 2016-07-15 1. Introduction --------------- Git commits are often related to specific issues (or bugs). The Git Bugtraq Configuration allows to associate a Git commit with a corresponding issue ID. Git clients may use this association to provide additional functionality, like displaying a hyperlink for issue IDs within a commit message which links to the appropriate issue tracker web page. The Git Bugtraq Configuration is similar to Subversion bugtraq properties and includes concepts of Gerrit commentlinks. 2. Configuration options ------------------------ The main configuration namespace is 'bugtraq'. * bugtraq.url (mandatory) specifies the URL of the bug tracking system. It must be properly URI encoded and it has to contain %BUGID%. %BUGID% will be replaced by the Git client with a concrete issue ID. * bugtraq.logregex (mandatory), bugtraq.loglinkregex (optional) and bugtraq.logfilterregex (optional) specify Perl Compatible Regular Expressions which will be used to extract the issue ID from a commit message. logregex must contain exactly one matching group, which extracts BUGIDs. If present, loglinkregex will be applied before logregex. It must contain exactly one matching group, which extracts parts from the commit message that should show up as a link. logregex will then be applied to every such link to extract the actual BUGID (which is a part of the entire link). If loglinkregex is set, logregex must extract exactly one BUGID. If present, logfilterregex will be applied before logregex (or loglinkregex, resp.). It must contain exactly one matching group which extracts arbitrary parts of the commit message that will be used as input for logregex (or loglinkregex, resp.). Every of these regular expressions may contain additional non-matching groups ('(?:') and matches case-sensitive unless explicitly set to case-insensitive ('(?i)'). The overall extraction looks as follows: commit message -> logfilterregex -> loglinkregex -> logregex -> BUGID Example: with logfilterregex set to [Ii]ssues?:?((\s*(,|and)?\s*#\d+)+) loglinkregex set to #\d+ logregex set to \d+ and having a commit message like Issues #3, #4 and #5: Git Bugtraq Configuration options (see rule #12) logfilterregex will pick "Issues #3, #4 and #5", loglinkregex will pick "#3", "#4", "#5" and logregex will pick "3", "4" and "5". Note: in Git-Config-like files, backslashes need to be escaped (see section 5). * bugtraq.loglinktext (optional) specifies a substitution text which will be used to display issue links extracted by logregex and loglinkregex, resp. loglinktext must contain %BUGID% which will be replaced by the concrete issue ID. Example: with logregex set to "#?(\d+)" and loglinktext set to "#%BUGID%", a commit message like Issue #3, 4, 5: message will be substituted to Issue #3, #4, #5: message with "##3", "#4", "#5" being links to the corresponding issues. * bugtraq.enabled (optional) specifies whether this Bugtraq Configuration is enabled. It defaults to 'true'. * bugtraq.projects (optional) specifies a comma-separated list of JIRA 'projects' where for each project the bugtraq functionality will be applied. This works by looping over all specified projects and substituting %PROJECT% by the project key. Substitution of %PROJECT% will be performed for bugtraq.url, bugtraq.logregex, bugtraq.loglinkregex, bugtraq.logfilterregex and bugtraq.loglinktext. See examples. 3. Multiple configurations -------------------------- There can be multiple configurations, either to support multiple issue trackers or alternative configurations for the same issue tracker. In the latter case, probably only one of these configurations will be enabled. When using multiple configurations, the bugtraq namespace is separated into multiple, disjoint sub-namespaces 'bugtraq.<name>', one for each configuration. Example: bugtraq.tracker1.url=... bugtraq.tracker1.logregex=... bugtraq.tracker2.url=... bugtraq.tracker2.logregex=... For a single commit message, all configurations will be applied, possibly giving multiple issue links to different issue trackers for a single commit message. 3.1 Handling of intersecting issues IDs If two issue IDs are intersecting (due to intersecting configurations), only the issue ID with the lower starting position will be displayed. The other issue ID will be ignored. 4. Configuration files ---------------------- There are two places where the configuration options can be specified: * in the .gitbugtraq file in the repository root. This file is using the default Git config file layout. * in $GIT_DIR/config Options specified in $GIT_DIR/config will override options from .gitbugtraq. An example content of .gitbugtraq (note, that '\' need to be escaped): [bugtraq] url = https://host/browse/SG-%BUGID% loglinkregex = SG-\\d+ logregex = \\d+ Exactly the same lines could be added as an additional section to $GIT_DIR/config as well. 5. logregex examples -------------------- * From messages like "Fix: #1" or "fixes: #1, #2 and #3", the "1", "2" and "3" should be extracted and the numbers including hash-sign (#) should show up as links logfilterregex = "(?i)fix(?:es)?\\: ((\\s*(,|and)?\\s*#\\d+)+)" loglinkregex = #\\d+ logregex = \\d+ * From messages like "Bug: #1" or "Bug IDs: #1; #2; #3" or "Cases: #1, #2" the "1", "2" and "3" should be extracted and only the numbers itself should show up as links logfilterregex = "(?i)(?:Bug[zs]?\\s*IDs?\\s*|Cases?)[#:; ]+((\\d+[ ,:;#]*)+)" logregex = \\d+ * From a message like "PRJA-1: test, PRJB-2: tset" with following configuration: projects = PRJA, PRJB url = https://server/browse/%PROJECT%-%BUGID% loglinkregex = %PROJECT%-\\d+ logregex = \\d+ Issue ID "1" will be extracted and linked to: https://server/browse/PRJA-1 and issue ID "2" will be extracted and linked to: https://server/browse/PRJB-1 References ----------  http://tortoisesvn.net/docs/release/TortoiseSVN_en/ tsvn-dug-bugtracker.html  https://gerrit-review.googlesource.com/Documentation/ config-gerrit.html#_a_id_commentlink_a_section_commentlink  http://perldoc.perl.org/perlre.html