Introduction

{"header":{"message":"doc: Reintegrate the intro by Visser & Dolstra from `manual.html'.","description":"The `manual.html' file had been deleted in r21718 (\"Hydra/28: Rename\n\"scheduler\" to \"evaluator\"\".)","timestamp":"2011-03-09T17:13:29Z","authors":[{"email":"ludo@gnu.org","name":"Ludovic Courtès"}]},"hash":"CPQQFQMZ3W7ISBF6L6WP2BWQYUZ6HQQI2VANQNRRBWT6JRIKR3KAC","authors":[],"deps":{"hashes":[["CPQQFQMZ3W7ISBF6L6WP2BWQYUZ6HQQI2VANQNRRBWT6JRIKR3KAC","doc: Reintegrate the intro by Visser & Dolstra from `manual.html'."],["AA",null],["5AKAE3R6RZMDWN2UMNYCB73Z2FEE5WJUCEY4YAAOHGAKHVJQPO7QC","start of hydra manual"],["KBW3FDZ2PK7YCH3ICSHFWP22CWXYAXIPULP6LEN3S3K22UT4WSVQC","Merge remote branch 'remotes/origin/master'"]],"deps":["5AKAE3R6RZMDWN2UMNYCB73Z2FEE5WJUCEY4YAAOHGAKHVJQPO7QC","KBW3FDZ2PK7YCH3ICSHFWP22CWXYAXIPULP6LEN3S3K22UT4WSVQC"],"known":[]},"hunks":[{"Edit":{"inode":{"change":3,"pos":3796},"path":"doc/manual/introduction.xml","line":4,"atom":{"NewVertex":{"up_context":[{"change":3,"pos":3933}],"down_context":[{"change":3,"pos":3933}],"flag":"BLOCK","start":0,"end":4269,"inode":{"change":3,"pos":3796}}},"contents":[{"Add":{"text":"","pos":"CPQQFQMZ3W7ISBF6L6WP2BWQYUZ6HQQI2VANQNRRBWT6JRIKR3KAC:0"}},{"Add":{"text":" Introduction","pos":"CPQQFQMZ3W7ISBF6L6WP2BWQYUZ6HQQI2VANQNRRBWT6JRIKR3KAC:30"}},{"Add":{"text":"","pos":"CPQQFQMZ3W7ISBF6L6WP2BWQYUZ6HQQI2VANQNRRBWT6JRIKR3KAC:31"}},{"Add":{"text":"

","pos":"CPQQFQMZ3W7ISBF6L6WP2BWQYUZ6HQQI2VANQNRRBWT6JRIKR3KAC:43"}},{"Add":{"text":" About Hydra","pos":"CPQQFQMZ3W7ISBF6L6WP2BWQYUZ6HQQI2VANQNRRBWT6JRIKR3KAC:74"}},{"Add":{"text":"","pos":"CPQQFQMZ3W7ISBF6L6WP2BWQYUZ6HQQI2VANQNRRBWT6JRIKR3KAC:75"}},{"Add":{"text":" ","pos":"CPQQFQMZ3W7ISBF6L6WP2BWQYUZ6HQQI2VANQNRRBWT6JRIKR3KAC:86"}},{"Add":{"text":" Hydra is a tool for continuous integration testing and software","pos":"CPQQFQMZ3W7ISBF6L6WP2BWQYUZ6HQQI2VANQNRRBWT6JRIKR3KAC:156"}},{"Add":{"text":" release that uses a purely functional language to describe build jobs","pos":"CPQQFQMZ3W7ISBF6L6WP2BWQYUZ6HQQI2VANQNRRBWT6JRIKR3KAC:232"}},{"Add":{"text":" and their dependencies. Continuous integration is a simple technique","pos":"CPQQFQMZ3W7ISBF6L6WP2BWQYUZ6HQQI2VANQNRRBWT6JRIKR3KAC:308"}},{"Add":{"text":" to improve the quality of the software development process. An","pos":"CPQQFQMZ3W7ISBF6L6WP2BWQYUZ6HQQI2VANQNRRBWT6JRIKR3KAC:378"}},{"Add":{"text":" automated system continuously or periodically checks out the source","pos":"CPQQFQMZ3W7ISBF6L6WP2BWQYUZ6HQQI2VANQNRRBWT6JRIKR3KAC:452"}},{"Add":{"text":" code of a project, builds it, runs tests, and produces reports for the","pos":"CPQQFQMZ3W7ISBF6L6WP2BWQYUZ6HQQI2VANQNRRBWT6JRIKR3KAC:529"}},{"Add":{"text":" developers. Thus, various errors that might accidentally be committed","pos":"CPQQFQMZ3W7ISBF6L6WP2BWQYUZ6HQQI2VANQNRRBWT6JRIKR3KAC:606"}},{"Add":{"text":" into the code base are automatically caught. Such a system allows","pos":"CPQQFQMZ3W7ISBF6L6WP2BWQYUZ6HQQI2VANQNRRBWT6JRIKR3KAC:679"}},{"Add":{"text":" more in-depth testing than what developers could feasibly do manually:","pos":"CPQQFQMZ3W7ISBF6L6WP2BWQYUZ6HQQI2VANQNRRBWT6JRIKR3KAC:756"}},{"Add":{"text":"","pos":"CPQQFQMZ3W7ISBF6L6WP2BWQYUZ6HQQI2VANQNRRBWT6JRIKR3KAC:757"}},{"Add":{"text":" ","pos":"CPQQFQMZ3W7ISBF6L6WP2BWQYUZ6HQQI2VANQNRRBWT6JRIKR3KAC:778"}},{"Add":{"text":"\t Portability testing: The","pos":"CPQQFQMZ3W7ISBF6L6WP2BWQYUZ6HQQI2VANQNRRBWT6JRIKR3KAC:836"}},{"Add":{"text":"\tsoftware may need to be built and tested on many different","pos":"CPQQFQMZ3W7ISBF6L6WP2BWQYUZ6HQQI2VANQNRRBWT6JRIKR3KAC:896"}},{"Add":{"text":"\tplatforms. It is infeasible for each developer to do this","pos":"CPQQFQMZ3W7ISBF6L6WP2BWQYUZ6HQQI2VANQNRRBWT6JRIKR3KAC:956"}},{"Add":{"text":"\tbefore every commit.","pos":"CPQQFQMZ3W7ISBF6L6WP2BWQYUZ6HQQI2VANQNRRBWT6JRIKR3KAC:978"}},{"Add":{"text":"\t","pos":"CPQQFQMZ3W7ISBF6L6WP2BWQYUZ6HQQI2VANQNRRBWT6JRIKR3KAC:991"}},{"Add":{"text":"","pos":"CPQQFQMZ3W7ISBF6L6WP2BWQYUZ6HQQI2VANQNRRBWT6JRIKR3KAC:992"}},{"Add":{"text":"\t Likewise, many projects have very large test sets","pos":"CPQQFQMZ3W7ISBF6L6WP2BWQYUZ6HQQI2VANQNRRBWT6JRIKR3KAC:1054"}},{"Add":{"text":"\t(e.g., regression tests in a compiler, or stress tests in a","pos":"CPQQFQMZ3W7ISBF6L6WP2BWQYUZ6HQQI2VANQNRRBWT6JRIKR3KAC:1115"}},{"Add":{"text":"\tDBMS) that can take hours or days to run to completion.","pos":"CPQQFQMZ3W7ISBF6L6WP2BWQYUZ6HQQI2VANQNRRBWT6JRIKR3KAC:1172"}},{"Add":{"text":"\t","pos":"CPQQFQMZ3W7ISBF6L6WP2BWQYUZ6HQQI2VANQNRRBWT6JRIKR3KAC:1185"}},{"Add":{"text":"","pos":"CPQQFQMZ3W7ISBF6L6WP2BWQYUZ6HQQI2VANQNRRBWT6JRIKR3KAC:1186"}},{"Add":{"text":"\t Many kinds of static and dynamic analyses can be","pos":"CPQQFQMZ3W7ISBF6L6WP2BWQYUZ6HQQI2VANQNRRBWT6JRIKR3KAC:1247"}},{"Add":{"text":"\tperformed as part of the tests, such as code coverage runs and","pos":"CPQQFQMZ3W7ISBF6L6WP2BWQYUZ6HQQI2VANQNRRBWT6JRIKR3KAC:1311"}},{"Add":{"text":"\tstatic analyses.","pos":"CPQQFQMZ3W7ISBF6L6WP2BWQYUZ6HQQI2VANQNRRBWT6JRIKR3KAC:1329"}},{"Add":{"text":"\t","pos":"CPQQFQMZ3W7ISBF6L6WP2BWQYUZ6HQQI2VANQNRRBWT6JRIKR3KAC:1342"}},{"Add":{"text":"","pos":"CPQQFQMZ3W7ISBF6L6WP2BWQYUZ6HQQI2VANQNRRBWT6JRIKR3KAC:1343"}},{"Add":{"text":"\t It may also be necessary to build many different","pos":"CPQQFQMZ3W7ISBF6L6WP2BWQYUZ6HQQI2VANQNRRBWT6JRIKR3KAC:1404"}},{"Add":{"text":"\tvariants of the software. For instance,","pos":"CPQQFQMZ3W7ISBF6L6WP2BWQYUZ6HQQI2VANQNRRBWT6JRIKR3KAC:1467"}},{"Add":{"text":"\tit may be necessary to verify that the component builds with","pos":"CPQQFQMZ3W7ISBF6L6WP2BWQYUZ6HQQI2VANQNRRBWT6JRIKR3KAC:1529"}},{"Add":{"text":"\tvarious versions of a compiler.","pos":"CPQQFQMZ3W7ISBF6L6WP2BWQYUZ6HQQI2VANQNRRBWT6JRIKR3KAC:1562"}},{"Add":{"text":"\t","pos":"CPQQFQMZ3W7ISBF6L6WP2BWQYUZ6HQQI2VANQNRRBWT6JRIKR3KAC:1575"}},{"Add":{"text":"","pos":"CPQQFQMZ3W7ISBF6L6WP2BWQYUZ6HQQI2VANQNRRBWT6JRIKR3KAC:1576"}},{"Add":{"text":"\t Developers typically use incremental building to","pos":"CPQQFQMZ3W7ISBF6L6WP2BWQYUZ6HQQI2VANQNRRBWT6JRIKR3KAC:1637"}},{"Add":{"text":"\ttest their changes (since a full build may take too long), but","pos":"CPQQFQMZ3W7ISBF6L6WP2BWQYUZ6HQQI2VANQNRRBWT6JRIKR3KAC:1701"}},{"Add":{"text":"\tthis is unreliable with many build management tools (such as","pos":"CPQQFQMZ3W7ISBF6L6WP2BWQYUZ6HQQI2VANQNRRBWT6JRIKR3KAC:1763"}},{"Add":{"text":"\tMake), i.e., the result of the incremental build might differ","pos":"CPQQFQMZ3W7ISBF6L6WP2BWQYUZ6HQQI2VANQNRRBWT6JRIKR3KAC:1826"}},{"Add":{"text":"\tfrom a full build.","pos":"CPQQFQMZ3W7ISBF6L6WP2BWQYUZ6HQQI2VANQNRRBWT6JRIKR3KAC:1846"}},{"Add":{"text":"\t","pos":"CPQQFQMZ3W7ISBF6L6WP2BWQYUZ6HQQI2VANQNRRBWT6JRIKR3KAC:1859"}},{"Add":{"text":"","pos":"CPQQFQMZ3W7ISBF6L6WP2BWQYUZ6HQQI2VANQNRRBWT6JRIKR3KAC:1860"}},{"Add":{"text":"\t It ensures that the software can be built from the","pos":"CPQQFQMZ3W7ISBF6L6WP2BWQYUZ6HQQI2VANQNRRBWT6JRIKR3KAC:1924"}},{"Add":{"text":"\tsources under revision control. Users of version management","pos":"CPQQFQMZ3W7ISBF6L6WP2BWQYUZ6HQQI2VANQNRRBWT6JRIKR3KAC:1988"}},{"Add":{"text":"\tsystems such as CVS and Subversion often forget to place","pos":"CPQQFQMZ3W7ISBF6L6WP2BWQYUZ6HQQI2VANQNRRBWT6JRIKR3KAC:2052"}},{"Add":{"text":"\tsource files under revision control.","pos":"CPQQFQMZ3W7ISBF6L6WP2BWQYUZ6HQQI2VANQNRRBWT6JRIKR3KAC:2090"}},{"Add":{"text":"\t","pos":"CPQQFQMZ3W7ISBF6L6WP2BWQYUZ6HQQI2VANQNRRBWT6JRIKR3KAC:2103"}},{"Add":{"text":"","pos":"CPQQFQMZ3W7ISBF6L6WP2BWQYUZ6HQQI2VANQNRRBWT6JRIKR3KAC:2104"}},{"Add":{"text":"\t The machines on which the continuous integration","pos":"CPQQFQMZ3W7ISBF6L6WP2BWQYUZ6HQQI2VANQNRRBWT6JRIKR3KAC:2165"}},{"Add":{"text":"\tsystem runs ideally provides a clean, well-defined build","pos":"CPQQFQMZ3W7ISBF6L6WP2BWQYUZ6HQQI2VANQNRRBWT6JRIKR3KAC:2223"}},{"Add":{"text":"\tenvironment. If this environment is administered through","pos":"CPQQFQMZ3W7ISBF6L6WP2BWQYUZ6HQQI2VANQNRRBWT6JRIKR3KAC:2282"}},{"Add":{"text":"\tproper SCM techniques, then builds produced by the system can","pos":"CPQQFQMZ3W7ISBF6L6WP2BWQYUZ6HQQI2VANQNRRBWT6JRIKR3KAC:2345"}},{"Add":{"text":"\tbe reproduced. In contrast, developer work environments are","pos":"CPQQFQMZ3W7ISBF6L6WP2BWQYUZ6HQQI2VANQNRRBWT6JRIKR3KAC:2407"}},{"Add":{"text":"\ttypically not under any kind of SCM control.","pos":"CPQQFQMZ3W7ISBF6L6WP2BWQYUZ6HQQI2VANQNRRBWT6JRIKR3KAC:2453"}},{"Add":{"text":"\t","pos":"CPQQFQMZ3W7ISBF6L6WP2BWQYUZ6HQQI2VANQNRRBWT6JRIKR3KAC:2466"}},{"Add":{"text":"","pos":"CPQQFQMZ3W7ISBF6L6WP2BWQYUZ6HQQI2VANQNRRBWT6JRIKR3KAC:2467"}},{"Add":{"text":"\t In large projects, developers often work on a","pos":"CPQQFQMZ3W7ISBF6L6WP2BWQYUZ6HQQI2VANQNRRBWT6JRIKR3KAC:2525"}},{"Add":{"text":"\tparticular component of the project, and do not build and test","pos":"CPQQFQMZ3W7ISBF6L6WP2BWQYUZ6HQQI2VANQNRRBWT6JRIKR3KAC:2589"}},{"Add":{"text":"\tthe composition of those components (again since this is","pos":"CPQQFQMZ3W7ISBF6L6WP2BWQYUZ6HQQI2VANQNRRBWT6JRIKR3KAC:2647"}},{"Add":{"text":"\tlikely to take too long). To prevent the phenomenon of ``big","pos":"CPQQFQMZ3W7ISBF6L6WP2BWQYUZ6HQQI2VANQNRRBWT6JRIKR3KAC:2710"}},{"Add":{"text":"\tbang integration'', where components are only tested together","pos":"CPQQFQMZ3W7ISBF6L6WP2BWQYUZ6HQQI2VANQNRRBWT6JRIKR3KAC:2773"}},{"Add":{"text":"\tnear the end of the development process, it is important to","pos":"CPQQFQMZ3W7ISBF6L6WP2BWQYUZ6HQQI2VANQNRRBWT6JRIKR3KAC:2834"}},{"Add":{"text":"\ttest components together as soon as possible (hence","pos":"CPQQFQMZ3W7ISBF6L6WP2BWQYUZ6HQQI2VANQNRRBWT6JRIKR3KAC:2887"}},{"Add":{"text":"\tcontinuous integration).","pos":"CPQQFQMZ3W7ISBF6L6WP2BWQYUZ6HQQI2VANQNRRBWT6JRIKR3KAC:2934"}},{"Add":{"text":"\t","pos":"CPQQFQMZ3W7ISBF6L6WP2BWQYUZ6HQQI2VANQNRRBWT6JRIKR3KAC:2947"}},{"Add":{"text":"","pos":"CPQQFQMZ3W7ISBF6L6WP2BWQYUZ6HQQI2VANQNRRBWT6JRIKR3KAC:2948"}},{"Add":{"text":"\t It allows software to be","pos":"CPQQFQMZ3W7ISBF6L6WP2BWQYUZ6HQQI2VANQNRRBWT6JRIKR3KAC:2985"}},{"Add":{"text":"\treleased by automatically creating","pos":"CPQQFQMZ3W7ISBF6L6WP2BWQYUZ6HQQI2VANQNRRBWT6JRIKR3KAC:3042"}},{"Add":{"text":"\tpackages that users can download and install. To do this","pos":"CPQQFQMZ3W7ISBF6L6WP2BWQYUZ6HQQI2VANQNRRBWT6JRIKR3KAC:3101"}},{"Add":{"text":"\tmanually represents an often prohibitive amount of work, as","pos":"CPQQFQMZ3W7ISBF6L6WP2BWQYUZ6HQQI2VANQNRRBWT6JRIKR3KAC:3162"}},{"Add":{"text":"\tone may want to produce releases for many different platforms:","pos":"CPQQFQMZ3W7ISBF6L6WP2BWQYUZ6HQQI2VANQNRRBWT6JRIKR3KAC:3226"}},{"Add":{"text":"\te.g., installers for Windows and Mac OS X, RPM or Debian","pos":"CPQQFQMZ3W7ISBF6L6WP2BWQYUZ6HQQI2VANQNRRBWT6JRIKR3KAC:3284"}},{"Add":{"text":"\tpackages for certain Linux distributions, and so on.","pos":"CPQQFQMZ3W7ISBF6L6WP2BWQYUZ6HQQI2VANQNRRBWT6JRIKR3KAC:3338"}},{"Add":{"text":"\t","pos":"CPQQFQMZ3W7ISBF6L6WP2BWQYUZ6HQQI2VANQNRRBWT6JRIKR3KAC:3351"}},{"Add":{"text":"","pos":"CPQQFQMZ3W7ISBF6L6WP2BWQYUZ6HQQI2VANQNRRBWT6JRIKR3KAC:3352"}},{"Add":{"text":" ","pos":"CPQQFQMZ3W7ISBF6L6WP2BWQYUZ6HQQI2VANQNRRBWT6JRIKR3KAC:3374"}},{"Add":{"text":" ","pos":"CPQQFQMZ3W7ISBF6L6WP2BWQYUZ6HQQI2VANQNRRBWT6JRIKR3KAC:3386"}},{"Add":{"text":"","pos":"CPQQFQMZ3W7ISBF6L6WP2BWQYUZ6HQQI2VANQNRRBWT6JRIKR3KAC:3387"}},{"Add":{"text":" ","pos":"CPQQFQMZ3W7ISBF6L6WP2BWQYUZ6HQQI2VANQNRRBWT6JRIKR3KAC:3398"}},{"Add":{"text":" In its simplest form, a continuous integration tool sits in a","pos":"CPQQFQMZ3W7ISBF6L6WP2BWQYUZ6HQQI2VANQNRRBWT6JRIKR3KAC:3466"}},{"Add":{"text":" loop building and releasing software components from a version","pos":"CPQQFQMZ3W7ISBF6L6WP2BWQYUZ6HQQI2VANQNRRBWT6JRIKR3KAC:3535"}},{"Add":{"text":" management system. For each component, it performs the","pos":"CPQQFQMZ3W7ISBF6L6WP2BWQYUZ6HQQI2VANQNRRBWT6JRIKR3KAC:3597"}},{"Add":{"text":" following tasks:","pos":"CPQQFQMZ3W7ISBF6L6WP2BWQYUZ6HQQI2VANQNRRBWT6JRIKR3KAC:3620"}},{"Add":{"text":"","pos":"CPQQFQMZ3W7ISBF6L6WP2BWQYUZ6HQQI2VANQNRRBWT6JRIKR3KAC:3621"}},{"Add":{"text":" ","pos":"CPQQFQMZ3W7ISBF6L6WP2BWQYUZ6HQQI2VANQNRRBWT6JRIKR3KAC:3642"}},{"Add":{"text":"","pos":"CPQQFQMZ3W7ISBF6L6WP2BWQYUZ6HQQI2VANQNRRBWT6JRIKR3KAC:3643"}},{"Add":{"text":"\tIt obtains the latest version of the component's","pos":"CPQQFQMZ3W7ISBF6L6WP2BWQYUZ6HQQI2VANQNRRBWT6JRIKR3KAC:3703"}},{"Add":{"text":"\tsource code from the version management system.","pos":"CPQQFQMZ3W7ISBF6L6WP2BWQYUZ6HQQI2VANQNRRBWT6JRIKR3KAC:3752"}},{"Add":{"text":"\t","pos":"CPQQFQMZ3W7ISBF6L6WP2BWQYUZ6HQQI2VANQNRRBWT6JRIKR3KAC:3765"}},{"Add":{"text":"","pos":"CPQQFQMZ3W7ISBF6L6WP2BWQYUZ6HQQI2VANQNRRBWT6JRIKR3KAC:3766"}},{"Add":{"text":"\t It runs the component's build process (which","pos":"CPQQFQMZ3W7ISBF6L6WP2BWQYUZ6HQQI2VANQNRRBWT6JRIKR3KAC:3823"}},{"Add":{"text":"\tpresumably includes the execution of the component's test","pos":"CPQQFQMZ3W7ISBF6L6WP2BWQYUZ6HQQI2VANQNRRBWT6JRIKR3KAC:3882"}},{"Add":{"text":"\tset).","pos":"CPQQFQMZ3W7ISBF6L6WP2BWQYUZ6HQQI2VANQNRRBWT6JRIKR3KAC:3889"}},{"Add":{"text":"\t","pos":"CPQQFQMZ3W7ISBF6L6WP2BWQYUZ6HQQI2VANQNRRBWT6JRIKR3KAC:3902"}},{"Add":{"text":"","pos":"CPQQFQMZ3W7ISBF6L6WP2BWQYUZ6HQQI2VANQNRRBWT6JRIKR3KAC:3903"}},{"Add":{"text":"\t It presents the results of the build (such as error","pos":"CPQQFQMZ3W7ISBF6L6WP2BWQYUZ6HQQI2VANQNRRBWT6JRIKR3KAC:3967"}},{"Add":{"text":"\tlogs and releases) to the developers, e.g., by producing a web","pos":"CPQQFQMZ3W7ISBF6L6WP2BWQYUZ6HQQI2VANQNRRBWT6JRIKR3KAC:4031"}},{"Add":{"text":"\tpage.","pos":"CPQQFQMZ3W7ISBF6L6WP2BWQYUZ6HQQI2VANQNRRBWT6JRIKR3KAC:4038"}},{"Add":{"text":"\t","pos":"CPQQFQMZ3W7ISBF6L6WP2BWQYUZ6HQQI2VANQNRRBWT6JRIKR3KAC:4051"}},{"Add":{"text":"","pos":"CPQQFQMZ3W7ISBF6L6WP2BWQYUZ6HQQI2VANQNRRBWT6JRIKR3KAC:4052"}},{"Add":{"text":" ","pos":"CPQQFQMZ3W7ISBF6L6WP2BWQYUZ6HQQI2VANQNRRBWT6JRIKR3KAC:4074"}},{"Add":{"text":"","pos":"CPQQFQMZ3W7ISBF6L6WP2BWQYUZ6HQQI2VANQNRRBWT6JRIKR3KAC:4075"}},{"Add":{"text":" Examples of continuous integration tools include Jenkins,","pos":"CPQQFQMZ3W7ISBF6L6WP2BWQYUZ6HQQI2VANQNRRBWT6JRIKR3KAC:4139"}},{"Add":{"text":" CruiseControl Tinderbox, Sisyphus, Anthill and BuildBot. These","pos":"CPQQFQMZ3W7ISBF6L6WP2BWQYUZ6HQQI2VANQNRRBWT6JRIKR3KAC:4208"}},{"Add":{"text":" tools have various limitations.","pos":"CPQQFQMZ3W7ISBF6L6WP2BWQYUZ6HQQI2VANQNRRBWT6JRIKR3KAC:4246"}},{"Add":{"text":"","pos":"CPQQFQMZ3W7ISBF6L6WP2BWQYUZ6HQQI2VANQNRRBWT6JRIKR3KAC:4247"}},{"Add":{"text":" ","pos":"CPQQFQMZ3W7ISBF6L6WP2BWQYUZ6HQQI2VANQNRRBWT6JRIKR3KAC:4268"}}]}},{"Replacement":{"inode":{"change":3,"pos":3796},"path":"doc/manual/introduction.xml","line":117,"ins":{"up_context":[{"change":3,"pos":3934}],"down_context":[{"change":3,"pos":3962}],"flag":"BLOCK","start":4270,"end":10139,"inode":{"change":3,"pos":3796}},"del":{"edges":[{"previous":"BLOCK","flag":"BLOCK | DELETED","from":{"change":3,"pos":3934},"to":{"change":3,"start":3934,"end":3962},"introduced_by":3}],"inode":{"change":3,"pos":3796}},"ins_contents":[{"Add":{"text":"\t They do not manage the build","pos":"CPQQFQMZ3W7ISBF6L6WP2BWQYUZ6HQQI2VANQNRRBWT6JRIKR3KAC:4320"}},{"Add":{"text":"\tenvironment. The build environment consists of the","pos":"CPQQFQMZ3W7ISBF6L6WP2BWQYUZ6HQQI2VANQNRRBWT6JRIKR3KAC:4384"}},{"Add":{"text":"\tdependencies necessary to perform a build action, e.g.,","pos":"CPQQFQMZ3W7ISBF6L6WP2BWQYUZ6HQQI2VANQNRRBWT6JRIKR3KAC:4441"}},{"Add":{"text":"\tcompilers, libraries, etc. Setting up the environment is","pos":"CPQQFQMZ3W7ISBF6L6WP2BWQYUZ6HQQI2VANQNRRBWT6JRIKR3KAC:4500"}},{"Add":{"text":"\ttypically done manually, and without proper SCM control (so it","pos":"CPQQFQMZ3W7ISBF6L6WP2BWQYUZ6HQQI2VANQNRRBWT6JRIKR3KAC:4564"}},{"Add":{"text":"\tmay be hard to reproduce a build at a later time). Manual","pos":"CPQQFQMZ3W7ISBF6L6WP2BWQYUZ6HQQI2VANQNRRBWT6JRIKR3KAC:4624"}},{"Add":{"text":"\tmanagement of the environment scales poorly in the number of","pos":"CPQQFQMZ3W7ISBF6L6WP2BWQYUZ6HQQI2VANQNRRBWT6JRIKR3KAC:4686"}},{"Add":{"text":"\tconfigurations that must be supported. For instance, suppose","pos":"CPQQFQMZ3W7ISBF6L6WP2BWQYUZ6HQQI2VANQNRRBWT6JRIKR3KAC:4749"}},{"Add":{"text":"\tthat we want to build a component that requires a certain","pos":"CPQQFQMZ3W7ISBF6L6WP2BWQYUZ6HQQI2VANQNRRBWT6JRIKR3KAC:4808"}},{"Add":{"text":"\tcompiler X. We then have to go to each machine and install X.","pos":"CPQQFQMZ3W7ISBF6L6WP2BWQYUZ6HQQI2VANQNRRBWT6JRIKR3KAC:4872"}},{"Add":{"text":"\tIf we later need a newer version of X, the process must be","pos":"CPQQFQMZ3W7ISBF6L6WP2BWQYUZ6HQQI2VANQNRRBWT6JRIKR3KAC:4932"}},{"Add":{"text":"\trepeated all over again. An ever worse problem occurs if","pos":"CPQQFQMZ3W7ISBF6L6WP2BWQYUZ6HQQI2VANQNRRBWT6JRIKR3KAC:4991"}},{"Add":{"text":"\tthere are conflicting, mutually exclusive versions of the","pos":"CPQQFQMZ3W7ISBF6L6WP2BWQYUZ6HQQI2VANQNRRBWT6JRIKR3KAC:5050"}},{"Add":{"text":"\tdependencies. Thus, simply installing the latest version is","pos":"CPQQFQMZ3W7ISBF6L6WP2BWQYUZ6HQQI2VANQNRRBWT6JRIKR3KAC:5112"}},{"Add":{"text":"\tnot an option. Of course, we can install these components in","pos":"CPQQFQMZ3W7ISBF6L6WP2BWQYUZ6HQQI2VANQNRRBWT6JRIKR3KAC:5175"}},{"Add":{"text":"\tdifferent directories and manually pass the appropriate paths","pos":"CPQQFQMZ3W7ISBF6L6WP2BWQYUZ6HQQI2VANQNRRBWT6JRIKR3KAC:5238"}},{"Add":{"text":"\tto the build processes of the various components. But this is","pos":"CPQQFQMZ3W7ISBF6L6WP2BWQYUZ6HQQI2VANQNRRBWT6JRIKR3KAC:5302"}},{"Add":{"text":"\ta rather tiresome and error-prone process.","pos":"CPQQFQMZ3W7ISBF6L6WP2BWQYUZ6HQQI2VANQNRRBWT6JRIKR3KAC:5346"}},{"Add":{"text":"\t","pos":"CPQQFQMZ3W7ISBF6L6WP2BWQYUZ6HQQI2VANQNRRBWT6JRIKR3KAC:5359"}},{"Add":{"text":"","pos":"CPQQFQMZ3W7ISBF6L6WP2BWQYUZ6HQQI2VANQNRRBWT6JRIKR3KAC:5360"}},{"Add":{"text":"\t They do not easily support variability in software","pos":"CPQQFQMZ3W7ISBF6L6WP2BWQYUZ6HQQI2VANQNRRBWT6JRIKR3KAC:5433"}},{"Add":{"text":"\tsystems. A system may have a great deal of build-time","pos":"CPQQFQMZ3W7ISBF6L6WP2BWQYUZ6HQQI2VANQNRRBWT6JRIKR3KAC:5500"}},{"Add":{"text":"\tvariability: optional functionality, whether to build a debug or","pos":"CPQQFQMZ3W7ISBF6L6WP2BWQYUZ6HQQI2VANQNRRBWT6JRIKR3KAC:5566"}},{"Add":{"text":"\tproduction version, different versions of dependencies, and so on.","pos":"CPQQFQMZ3W7ISBF6L6WP2BWQYUZ6HQQI2VANQNRRBWT6JRIKR3KAC:5634"}},{"Add":{"text":"\t(For instance, the Linux kernel now has over 2,600 build-time","pos":"CPQQFQMZ3W7ISBF6L6WP2BWQYUZ6HQQI2VANQNRRBWT6JRIKR3KAC:5697"}},{"Add":{"text":"\tconfiguration switches.) It is therefore important that a continuous","pos":"CPQQFQMZ3W7ISBF6L6WP2BWQYUZ6HQQI2VANQNRRBWT6JRIKR3KAC:5768"}},{"Add":{"text":"\tintegration tool can easily select and test different instances from","pos":"CPQQFQMZ3W7ISBF6L6WP2BWQYUZ6HQQI2VANQNRRBWT6JRIKR3KAC:5838"}},{"Add":{"text":"\tthe configuration space of the system to reveal problems, such as","pos":"CPQQFQMZ3W7ISBF6L6WP2BWQYUZ6HQQI2VANQNRRBWT6JRIKR3KAC:5905"}},{"Add":{"text":"\terroneous interactions between features. In a continuous integration","pos":"CPQQFQMZ3W7ISBF6L6WP2BWQYUZ6HQQI2VANQNRRBWT6JRIKR3KAC:5976"}},{"Add":{"text":"\tsetting, it is also useful to test different combinations of versions","pos":"CPQQFQMZ3W7ISBF6L6WP2BWQYUZ6HQQI2VANQNRRBWT6JRIKR3KAC:6047"}},{"Add":{"text":"\tof subsystems, e.g., the head revision of a component against stable","pos":"CPQQFQMZ3W7ISBF6L6WP2BWQYUZ6HQQI2VANQNRRBWT6JRIKR3KAC:6117"}},{"Add":{"text":"\treleases of its dependencies, and vice versa, as this can reveal","pos":"CPQQFQMZ3W7ISBF6L6WP2BWQYUZ6HQQI2VANQNRRBWT6JRIKR3KAC:6183"}},{"Add":{"text":"\tvarious integration problems.","pos":"CPQQFQMZ3W7ISBF6L6WP2BWQYUZ6HQQI2VANQNRRBWT6JRIKR3KAC:6214"}},{"Add":{"text":"\t","pos":"CPQQFQMZ3W7ISBF6L6WP2BWQYUZ6HQQI2VANQNRRBWT6JRIKR3KAC:6227"}},{"Add":{"text":"","pos":"CPQQFQMZ3W7ISBF6L6WP2BWQYUZ6HQQI2VANQNRRBWT6JRIKR3KAC:6228"}},{"Add":{"text":" ","pos":"CPQQFQMZ3W7ISBF6L6WP2BWQYUZ6HQQI2VANQNRRBWT6JRIKR3KAC:6250"}},{"Add":{"text":" ","pos":"CPQQFQMZ3W7ISBF6L6WP2BWQYUZ6HQQI2VANQNRRBWT6JRIKR3KAC:6262"}},{"Add":{"text":"","pos":"CPQQFQMZ3W7ISBF6L6WP2BWQYUZ6HQQI2VANQNRRBWT6JRIKR3KAC:6263"}},{"Add":{"text":" ","pos":"CPQQFQMZ3W7ISBF6L6WP2BWQYUZ6HQQI2VANQNRRBWT6JRIKR3KAC:6274"}},{"Add":{"text":" Hydra, is a continuous integration tool","pos":"CPQQFQMZ3W7ISBF6L6WP2BWQYUZ6HQQI2VANQNRRBWT6JRIKR3KAC:6341"}},{"Add":{"text":" that solves these problems. It is built on top of the Nix package manager,","pos":"CPQQFQMZ3W7ISBF6L6WP2BWQYUZ6HQQI2VANQNRRBWT6JRIKR3KAC:6477"}},{"Add":{"text":" which has a purely functional language for describing package","pos":"CPQQFQMZ3W7ISBF6L6WP2BWQYUZ6HQQI2VANQNRRBWT6JRIKR3KAC:6545"}},{"Add":{"text":" build actions and their dependencies. This allows the build","pos":"CPQQFQMZ3W7ISBF6L6WP2BWQYUZ6HQQI2VANQNRRBWT6JRIKR3KAC:6612"}},{"Add":{"text":" environment for projects to be produced automatically and","pos":"CPQQFQMZ3W7ISBF6L6WP2BWQYUZ6HQQI2VANQNRRBWT6JRIKR3KAC:6676"}},{"Add":{"text":" deterministically, and variability in components to be expressed","pos":"CPQQFQMZ3W7ISBF6L6WP2BWQYUZ6HQQI2VANQNRRBWT6JRIKR3KAC:6747"}},{"Add":{"text":" naturally using functions; and as such is an ideal fit for a","pos":"CPQQFQMZ3W7ISBF6L6WP2BWQYUZ6HQQI2VANQNRRBWT6JRIKR3KAC:6814"}},{"Add":{"text":" continuous build system.","pos":"CPQQFQMZ3W7ISBF6L6WP2BWQYUZ6HQQI2VANQNRRBWT6JRIKR3KAC:6845"}},{"Add":{"text":" ","pos":"CPQQFQMZ3W7ISBF6L6WP2BWQYUZ6HQQI2VANQNRRBWT6JRIKR3KAC:6857"}},{"Add":{"text":"","pos":"CPQQFQMZ3W7ISBF6L6WP2BWQYUZ6HQQI2VANQNRRBWT6JRIKR3KAC:6858"}},{"Add":{"text":"

","pos":"CPQQFQMZ3W7ISBF6L6WP2BWQYUZ6HQQI2VANQNRRBWT6JRIKR3KAC:6871"}},{"Add":{"text":"","pos":"CPQQFQMZ3W7ISBF6L6WP2BWQYUZ6HQQI2VANQNRRBWT6JRIKR3KAC:6872"}},{"Add":{"text":"

","pos":"CPQQFQMZ3W7ISBF6L6WP2BWQYUZ6HQQI2VANQNRRBWT6JRIKR3KAC:6884"}},{"Add":{"text":" About Us","pos":"CPQQFQMZ3W7ISBF6L6WP2BWQYUZ6HQQI2VANQNRRBWT6JRIKR3KAC:6912"}},{"Add":{"text":"","pos":"CPQQFQMZ3W7ISBF6L6WP2BWQYUZ6HQQI2VANQNRRBWT6JRIKR3KAC:6913"}},{"Add":{"text":" ","pos":"CPQQFQMZ3W7ISBF6L6WP2BWQYUZ6HQQI2VANQNRRBWT6JRIKR3KAC:6924"}},{"Add":{"text":" Hydra is the successor of the Nix Buildfarm, which was developed","pos":"CPQQFQMZ3W7ISBF6L6WP2BWQYUZ6HQQI2VANQNRRBWT6JRIKR3KAC:6995"}},{"Add":{"text":" in tandem with the Nix software deployment system. Nix was","pos":"CPQQFQMZ3W7ISBF6L6WP2BWQYUZ6HQQI2VANQNRRBWT6JRIKR3KAC:7060"}},{"Add":{"text":" originally developed at the Department of Information and","pos":"CPQQFQMZ3W7ISBF6L6WP2BWQYUZ6HQQI2VANQNRRBWT6JRIKR3KAC:7124"}},{"Add":{"text":" Computing Sciences, Utrecht University by the TraCE project","pos":"CPQQFQMZ3W7ISBF6L6WP2BWQYUZ6HQQI2VANQNRRBWT6JRIKR3KAC:7190"}},{"Add":{"text":" (2003-2008). The project was funded by the Software Engineering","pos":"CPQQFQMZ3W7ISBF6L6WP2BWQYUZ6HQQI2VANQNRRBWT6JRIKR3KAC:7260"}},{"Add":{"text":" Research Program Jacquard to improve the support for variability","pos":"CPQQFQMZ3W7ISBF6L6WP2BWQYUZ6HQQI2VANQNRRBWT6JRIKR3KAC:7331"}},{"Add":{"text":" in software systems. Funding for the development of Nix and","pos":"CPQQFQMZ3W7ISBF6L6WP2BWQYUZ6HQQI2VANQNRRBWT6JRIKR3KAC:7398"}},{"Add":{"text":" Hydra is now provided by the NIRICT LaQuSo Build Farm project.","pos":"CPQQFQMZ3W7ISBF6L6WP2BWQYUZ6HQQI2VANQNRRBWT6JRIKR3KAC:7467"}},{"Add":{"text":" ","pos":"CPQQFQMZ3W7ISBF6L6WP2BWQYUZ6HQQI2VANQNRRBWT6JRIKR3KAC:7479"}},{"Add":{"text":"

","pos":"CPQQFQMZ3W7ISBF6L6WP2BWQYUZ6HQQI2VANQNRRBWT6JRIKR3KAC:7492"}},{"Add":{"text":"","pos":"CPQQFQMZ3W7ISBF6L6WP2BWQYUZ6HQQI2VANQNRRBWT6JRIKR3KAC:7493"}},{"Add":{"text":"

","pos":"CPQQFQMZ3W7ISBF6L6WP2BWQYUZ6HQQI2VANQNRRBWT6JRIKR3KAC:7505"}},{"Add":{"text":" About this Manual","pos":"CPQQFQMZ3W7ISBF6L6WP2BWQYUZ6HQQI2VANQNRRBWT6JRIKR3KAC:7542"}},{"Add":{"text":"","pos":"CPQQFQMZ3W7ISBF6L6WP2BWQYUZ6HQQI2VANQNRRBWT6JRIKR3KAC:7543"}},{"Add":{"text":" ","pos":"CPQQFQMZ3W7ISBF6L6WP2BWQYUZ6HQQI2VANQNRRBWT6JRIKR3KAC:7554"}},{"Add":{"text":" This manual tells you how to install the Hydra buildfarm","pos":"CPQQFQMZ3W7ISBF6L6WP2BWQYUZ6HQQI2VANQNRRBWT6JRIKR3KAC:7617"}},{"Add":{"text":" software on your own server and how to operate that server using","pos":"CPQQFQMZ3W7ISBF6L6WP2BWQYUZ6HQQI2VANQNRRBWT6JRIKR3KAC:7688"}},{"Add":{"text":" its web interface.","pos":"CPQQFQMZ3W7ISBF6L6WP2BWQYUZ6HQQI2VANQNRRBWT6JRIKR3KAC:7713"}},{"Add":{"text":" ","pos":"CPQQFQMZ3W7ISBF6L6WP2BWQYUZ6HQQI2VANQNRRBWT6JRIKR3KAC:7725"}},{"Add":{"text":"

","pos":"CPQQFQMZ3W7ISBF6L6WP2BWQYUZ6HQQI2VANQNRRBWT6JRIKR3KAC:7738"}},{"Add":{"text":"","pos":"CPQQFQMZ3W7ISBF6L6WP2BWQYUZ6HQQI2VANQNRRBWT6JRIKR3KAC:7739"}},{"Add":{"text":"","pos":"CPQQFQMZ3W7ISBF6L6WP2BWQYUZ6HQQI2VANQNRRBWT6JRIKR3KAC:7740"}},{"Add":{"text":"

","pos":"CPQQFQMZ3W7ISBF6L6WP2BWQYUZ6HQQI2VANQNRRBWT6JRIKR3KAC:7752"}},{"Add":{"text":" License","pos":"CPQQFQMZ3W7ISBF6L6WP2BWQYUZ6HQQI2VANQNRRBWT6JRIKR3KAC:7779"}},{"Add":{"text":"","pos":"CPQQFQMZ3W7ISBF6L6WP2BWQYUZ6HQQI2VANQNRRBWT6JRIKR3KAC:7780"}},{"Add":{"text":" ","pos":"CPQQFQMZ3W7ISBF6L6WP2BWQYUZ6HQQI2VANQNRRBWT6JRIKR3KAC:7791"}},{"Add":{"text":" Hydra is free software: you can redistribute it and/or","pos":"CPQQFQMZ3W7ISBF6L6WP2BWQYUZ6HQQI2VANQNRRBWT6JRIKR3KAC:7852"}},{"Add":{"text":" modify it under the terms of the GNU General Public License as","pos":"CPQQFQMZ3W7ISBF6L6WP2BWQYUZ6HQQI2VANQNRRBWT6JRIKR3KAC:7921"}},{"Add":{"text":" published by the Free Software Foundation, either version 3 of","pos":"CPQQFQMZ3W7ISBF6L6WP2BWQYUZ6HQQI2VANQNRRBWT6JRIKR3KAC:7990"}},{"Add":{"text":" the License, or (at your option) any later version.","pos":"CPQQFQMZ3W7ISBF6L6WP2BWQYUZ6HQQI2VANQNRRBWT6JRIKR3KAC:8048"}},{"Add":{"text":" ","pos":"CPQQFQMZ3W7ISBF6L6WP2BWQYUZ6HQQI2VANQNRRBWT6JRIKR3KAC:8060"}},{"Add":{"text":"","pos":"CPQQFQMZ3W7ISBF6L6WP2BWQYUZ6HQQI2VANQNRRBWT6JRIKR3KAC:8061"}},{"Add":{"text":" ","pos":"CPQQFQMZ3W7ISBF6L6WP2BWQYUZ6HQQI2VANQNRRBWT6JRIKR3KAC:8072"}},{"Add":{"text":" Hydra is distributed in the hope that it will be useful,","pos":"CPQQFQMZ3W7ISBF6L6WP2BWQYUZ6HQQI2VANQNRRBWT6JRIKR3KAC:8135"}},{"Add":{"text":" but WITHOUT ANY WARRANTY; without even the implied warranty of","pos":"CPQQFQMZ3W7ISBF6L6WP2BWQYUZ6HQQI2VANQNRRBWT6JRIKR3KAC:8204"}},{"Add":{"text":" MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the","pos":"CPQQFQMZ3W7ISBF6L6WP2BWQYUZ6HQQI2VANQNRRBWT6JRIKR3KAC:8272"}},{"Add":{"text":" GNU General","pos":"CPQQFQMZ3W7ISBF6L6WP2BWQYUZ6HQQI2VANQNRRBWT6JRIKR3KAC:8338"}},{"Add":{"text":" Public License for more details.","pos":"CPQQFQMZ3W7ISBF6L6WP2BWQYUZ6HQQI2VANQNRRBWT6JRIKR3KAC:8384"}},{"Add":{"text":" ","pos":"CPQQFQMZ3W7ISBF6L6WP2BWQYUZ6HQQI2VANQNRRBWT6JRIKR3KAC:8396"}},{"Add":{"text":"

","pos":"CPQQFQMZ3W7ISBF6L6WP2BWQYUZ6HQQI2VANQNRRBWT6JRIKR3KAC:8409"}},{"Add":{"text":"","pos":"CPQQFQMZ3W7ISBF6L6WP2BWQYUZ6HQQI2VANQNRRBWT6JRIKR3KAC:8410"}},{"Add":{"text":"

","pos":"CPQQFQMZ3W7ISBF6L6WP2BWQYUZ6HQQI2VANQNRRBWT6JRIKR3KAC:8422"}},{"Add":{"text":" Hydra at <literal>nixos.org</literal>","pos":"CPQQFQMZ3W7ISBF6L6WP2BWQYUZ6HQQI2VANQNRRBWT6JRIKR3KAC:8479"}},{"Add":{"text":"","pos":"CPQQFQMZ3W7ISBF6L6WP2BWQYUZ6HQQI2VANQNRRBWT6JRIKR3KAC:8480"}},{"Add":{"text":" ","pos":"CPQQFQMZ3W7ISBF6L6WP2BWQYUZ6HQQI2VANQNRRBWT6JRIKR3KAC:8491"}},{"Add":{"text":" The nixos.org installation of Hydra runs at","pos":"CPQQFQMZ3W7ISBF6L6WP2BWQYUZ6HQQI2VANQNRRBWT6JRIKR3KAC:8560"}},{"Add":{"text":" http://hydra.nixos.org/.","pos":"CPQQFQMZ3W7ISBF6L6WP2BWQYUZ6HQQI2VANQNRRBWT6JRIKR3KAC:8666"}},{"Add":{"text":"","pos":"CPQQFQMZ3W7ISBF6L6WP2BWQYUZ6HQQI2VANQNRRBWT6JRIKR3KAC:8667"}},{"Add":{"text":" That installation is used to build software components from the ","pos":"CPQQFQMZ3W7ISBF6L6WP2BWQYUZ6HQQI2VANQNRRBWT6JRIKR3KAC:8738"}},{"Add":{"text":" Nix, ","pos":"CPQQFQMZ3W7ISBF6L6WP2BWQYUZ6HQQI2VANQNRRBWT6JRIKR3KAC:8793"}},{"Add":{"text":" NixOS,","pos":"CPQQFQMZ3W7ISBF6L6WP2BWQYUZ6HQQI2VANQNRRBWT6JRIKR3KAC:8855"}},{"Add":{"text":" GNU,","pos":"CPQQFQMZ3W7ISBF6L6WP2BWQYUZ6HQQI2VANQNRRBWT6JRIKR3KAC:8912"}},{"Add":{"text":" Stratego/XT,","pos":"CPQQFQMZ3W7ISBF6L6WP2BWQYUZ6HQQI2VANQNRRBWT6JRIKR3KAC:8979"}},{"Add":{"text":" and related projects.","pos":"CPQQFQMZ3W7ISBF6L6WP2BWQYUZ6HQQI2VANQNRRBWT6JRIKR3KAC:9007"}},{"Add":{"text":" ","pos":"CPQQFQMZ3W7ISBF6L6WP2BWQYUZ6HQQI2VANQNRRBWT6JRIKR3KAC:9019"}},{"Add":{"text":"","pos":"CPQQFQMZ3W7ISBF6L6WP2BWQYUZ6HQQI2VANQNRRBWT6JRIKR3KAC:9020"}},{"Add":{"text":" ","pos":"CPQQFQMZ3W7ISBF6L6WP2BWQYUZ6HQQI2VANQNRRBWT6JRIKR3KAC:9031"}},{"Add":{"text":" If you are one of the developers on those projects, it is likely","pos":"CPQQFQMZ3W7ISBF6L6WP2BWQYUZ6HQQI2VANQNRRBWT6JRIKR3KAC:9102"}},{"Add":{"text":" that you will be using the NixOS Hydra server in some way. If","pos":"CPQQFQMZ3W7ISBF6L6WP2BWQYUZ6HQQI2VANQNRRBWT6JRIKR3KAC:9170"}},{"Add":{"text":" you need to administer automatic builds for your project, you","pos":"CPQQFQMZ3W7ISBF6L6WP2BWQYUZ6HQQI2VANQNRRBWT6JRIKR3KAC:9238"}},{"Add":{"text":" should pull the right strings to get an account on the","pos":"CPQQFQMZ3W7ISBF6L6WP2BWQYUZ6HQQI2VANQNRRBWT6JRIKR3KAC:9299"}},{"Add":{"text":" server. This manual will tell you how to set up new projects and","pos":"CPQQFQMZ3W7ISBF6L6WP2BWQYUZ6HQQI2VANQNRRBWT6JRIKR3KAC:9370"}},{"Add":{"text":" build jobs within those projects and write a release.nix file to","pos":"CPQQFQMZ3W7ISBF6L6WP2BWQYUZ6HQQI2VANQNRRBWT6JRIKR3KAC:9441"}},{"Add":{"text":" describe the build process of your project to Hydra. You can","pos":"CPQQFQMZ3W7ISBF6L6WP2BWQYUZ6HQQI2VANQNRRBWT6JRIKR3KAC:9508"}},{"Add":{"text":" skip the next chapter.","pos":"CPQQFQMZ3W7ISBF6L6WP2BWQYUZ6HQQI2VANQNRRBWT6JRIKR3KAC:9537"}},{"Add":{"text":" ","pos":"CPQQFQMZ3W7ISBF6L6WP2BWQYUZ6HQQI2VANQNRRBWT6JRIKR3KAC:9549"}},{"Add":{"text":"","pos":"CPQQFQMZ3W7ISBF6L6WP2BWQYUZ6HQQI2VANQNRRBWT6JRIKR3KAC:9550"}},{"Add":{"text":" ","pos":"CPQQFQMZ3W7ISBF6L6WP2BWQYUZ6HQQI2VANQNRRBWT6JRIKR3KAC:9561"}},{"Add":{"text":" If your project does not yet have automatic builds within the","pos":"CPQQFQMZ3W7ISBF6L6WP2BWQYUZ6HQQI2VANQNRRBWT6JRIKR3KAC:9629"}},{"Add":{"text":" NixOS Hydra server, it may actually be eligible. We are in the","pos":"CPQQFQMZ3W7ISBF6L6WP2BWQYUZ6HQQI2VANQNRRBWT6JRIKR3KAC:9698"}},{"Add":{"text":" process of setting up a large buildfarm that should be able to","pos":"CPQQFQMZ3W7ISBF6L6WP2BWQYUZ6HQQI2VANQNRRBWT6JRIKR3KAC:9767"}},{"Add":{"text":" support open source and academic software projects. Get in","pos":"CPQQFQMZ3W7ISBF6L6WP2BWQYUZ6HQQI2VANQNRRBWT6JRIKR3KAC:9832"}},{"Add":{"text":" touch.","pos":"CPQQFQMZ3W7ISBF6L6WP2BWQYUZ6HQQI2VANQNRRBWT6JRIKR3KAC:9845"}},{"Add":{"text":" ","pos":"CPQQFQMZ3W7ISBF6L6WP2BWQYUZ6HQQI2VANQNRRBWT6JRIKR3KAC:9857"}},{"Add":{"text":"

","pos":"CPQQFQMZ3W7ISBF6L6WP2BWQYUZ6HQQI2VANQNRRBWT6JRIKR3KAC:9870"}},{"Add":{"text":"","pos":"CPQQFQMZ3W7ISBF6L6WP2BWQYUZ6HQQI2VANQNRRBWT6JRIKR3KAC:9871"}},{"Add":{"text":"

","pos":"CPQQFQMZ3W7ISBF6L6WP2BWQYUZ6HQQI2VANQNRRBWT6JRIKR3KAC:9883"}},{"Add":{"text":" Hydra on your own buildfarm","pos":"CPQQFQMZ3W7ISBF6L6WP2BWQYUZ6HQQI2VANQNRRBWT6JRIKR3KAC:9930"}},{"Add":{"text":"","pos":"CPQQFQMZ3W7ISBF6L6WP2BWQYUZ6HQQI2VANQNRRBWT6JRIKR3KAC:9931"}},{"Add":{"text":" ","pos":"CPQQFQMZ3W7ISBF6L6WP2BWQYUZ6HQQI2VANQNRRBWT6JRIKR3KAC:9942"}},{"Add":{"text":" If you need to run your own Hydra installation, explains how to download and","pos":"CPQQFQMZ3W7ISBF6L6WP2BWQYUZ6HQQI2VANQNRRBWT6JRIKR3KAC:10068"}},{"Add":{"text":" install the system on your own server.","pos":"CPQQFQMZ3W7ISBF6L6WP2BWQYUZ6HQQI2VANQNRRBWT6JRIKR3KAC:10113"}},{"Add":{"text":" ","pos":"CPQQFQMZ3W7ISBF6L6WP2BWQYUZ6HQQI2VANQNRRBWT6JRIKR3KAC:10125"}},{"Add":{"text":"

","pos":"CPQQFQMZ3W7ISBF6L6WP2BWQYUZ6HQQI2VANQNRRBWT6JRIKR3KAC:10138"}}],"del_contents":[{"Del":{"text":"Introduction","pos":"KBW3FDZ2PK7YCH3ICSHFWP22CWXYAXIPULP6LEN3S3K22UT4WSVQC:3961"}}]}},{"Edit":{"inode":{"change":2,"pos":1},"path":"doc/manual/manual.xml","line":33,"atom":{"NewVertex":{"up_context":[{"change":2,"pos":894}],"down_context":[{"change":2,"pos":894}],"flag":"BLOCK","start":10140,"end":10489,"inode":{"change":2,"pos":1}}},"contents":[{"Add":{"text":" ","pos":"CPQQFQMZ3W7ISBF6L6WP2BWQYUZ6HQQI2VANQNRRBWT6JRIKR3KAC:10154"}},{"Add":{"text":" ","pos":"CPQQFQMZ3W7ISBF6L6WP2BWQYUZ6HQQI2VANQNRRBWT6JRIKR3KAC:10175"}},{"Add":{"text":" Eelco","pos":"CPQQFQMZ3W7ISBF6L6WP2BWQYUZ6HQQI2VANQNRRBWT6JRIKR3KAC:10214"}},{"Add":{"text":" Visser","pos":"CPQQFQMZ3W7ISBF6L6WP2BWQYUZ6HQQI2VANQNRRBWT6JRIKR3KAC:10250"}},{"Add":{"text":" ","pos":"CPQQFQMZ3W7ISBF6L6WP2BWQYUZ6HQQI2VANQNRRBWT6JRIKR3KAC:10272"}},{"Add":{"text":" ","pos":"CPQQFQMZ3W7ISBF6L6WP2BWQYUZ6HQQI2VANQNRRBWT6JRIKR3KAC:10294"}},{"Add":{"text":" Delft University of Technology","pos":"CPQQFQMZ3W7ISBF6L6WP2BWQYUZ6HQQI2VANQNRRBWT6JRIKR3KAC:10354"}},{"Add":{"text":" Department of Software Technology","pos":"CPQQFQMZ3W7ISBF6L6WP2BWQYUZ6HQQI2VANQNRRBWT6JRIKR3KAC:10415"}},{"Add":{"text":" ","pos":"CPQQFQMZ3W7ISBF6L6WP2BWQYUZ6HQQI2VANQNRRBWT6JRIKR3KAC:10438"}},{"Add":{"text":" Author","pos":"CPQQFQMZ3W7ISBF6L6WP2BWQYUZ6HQQI2VANQNRRBWT6JRIKR3KAC:10472"}},{"Add":{"text":" ","pos":"CPQQFQMZ3W7ISBF6L6WP2BWQYUZ6HQQI2VANQNRRBWT6JRIKR3KAC:10488"}}]}}],"owner":"grahamc","repo":"hydra","token":"NSCq9WK7X5670KUlPv901noK5QptoC4hgBfqq0K7OOE=","login":null}

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