Hacking

{"header":{"message":"Remove old files","description":null,"timestamp":"2021-02-24T00:07:11Z","authors":[{"email":"ismael.bouya@normalesup.org","name":"Ismaël Bouya"}]},"hash":"X6Y72FHOSRZA5RM5NOEUIJNJ5DIGBSXYJZENUXH45W3OKYIVUMMAC","authors":[],"deps":{"hashes":[["X6Y72FHOSRZA5RM5NOEUIJNJ5DIGBSXYJZENUXH45W3OKYIVUMMAC","Remove old files"],["AA",null],["FIWFPVURRED7UXTYJYAX3ZS77FROKIAFUGC5VK7DFINWWCHO2GQQC","doc: Add myself as a co-author."],["AVU7BQ7WFER5ADSYQDHZVTVPSJPQYFRIHZ7CWTSEEHYIKALXJMSAC","doc: Fix typo in callout ID."],["5WCR3MKUB62I4B27L6LQGOX7UMDABRZZYFD6KMPS3H5NN54QR2HQC","trunk -> master"],["MTH54QGHQBKKQPHCAT64TRP4P5COYGNEYPYTQWPADTFXZB3WPLDAC","typo"],["AUFJYCESTQOINIBMZZI53Y6HJUTMIPRXQUS67UIX456ZCYDA7SNQC","Update link to hydra nixexpression"],["CPMO4LIVLJU7ECSD5RGEASCAVWXGOEZJXK5QV5537YUVA45YK2YQC","svn.nixos.org -> github.com"],["GZI3X3IWTCO3G5YOUKEUF3PMPWRTJDGVZ7NAYCDYY4GCMO2T5PQAC","Document ssmtp for email notifications. 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behind reverse proxy (#423)"],["DWQCLOPQCZENDPZ3JKIL4T2XU3IPT5BU6VKTOMS3PXZDUL3KDZSQC","Tweaks for nix-shell"],["HPXFXHFSOC4CR5CQYY67EY57DUPMQA2JAR4MLIL5YN64W4PFQQZQC","Remove SHA-1 hash from BuildProducts"],["3463ZP55AVXWRCCITGBFGBZ6NQ5ZRNAUK4H3PZVSWFJEER5ZXXTQC","doc: Mention the 3 processes that make up Hydra."],["PKE6I67S7TDGKEFCKIQZOZ5PSDZXCSPOQGSKDAE5NST3NOOLRUXAC","doc: Import the \"Creating Projects\" chapter by Visser & Dolstra."],["5AKAE3R6RZMDWN2UMNYCB73Z2FEE5WJUCEY4YAAOHGAKHVJQPO7QC","start of hydra manual"],["6A6CZ7SC2VGEGRC5LSNTDDM3LFWVYO6Z6QNDF74SBJWO5P6T3ARQC","draft manual"],["YKD7OW6TMFSUWBTWBMVCVFVHIOTTAUPVLK23MXE4GZUOWEYCKWJQC","doc: Update to use angle brackets and `tarball' in the same evaluation."],["UXRNODRJJU7A33F4PG24WOHKTJFI3XQMZGT2MUOBRAH2MPQ7NZ2AC","Remove hydra-build and the old hydra-queue-runner"],["FV2M6MOTAP4BJMEKU5XUDVEACWEJGEIRCCE2MRY3F6SF2SFOE3MQC","hydra: use autoconf/-make"],["6ZHQKBZP3ZWFXEGYR3TYRQANRLVO6PBM7X5DK6Z7JMNMPY6A6Z7AC","Fix 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To\nget the latest version of Hydra from GitHub:\n\n$ git clone git://github.com/NixOS/hydra.git\n$ cd hydra\n\n\n\nTo build it and its dependencies:\n\n$ nix-build release.nix -A build.x86_64-linux\n\n\n\nTo build all dependencies and start a shell in which all\nenvironment variables (such as PERL5LIB) are set up so\nthat those dependencies can be found:\n\n"},{"Del":"$ nix-shell\n"},{"Del":"\nTo build Hydra, you should then do:\n\n[nix-shell]$ ./bootstrap\n[nix-shell]$ configurePhase\n[nix-shell]$ make\n\nYou can run the Hydra web server in your source tree as follows:\n\n$ ./src/script/hydra-server\n\n\n\n\n"}]}},{"FileDel":{"deleted_names":[{"basename":"manual.xml","metadata":0}],"del":{"EdgeMap":{"edges":[{"previous":"BLOCK | FOLDER","flag":"BLOCK | FOLDER | DELETED","from":{"change":14,"pos":18},"to":{"change":14,"start":1178,"end":1212},"introduced_by":14},{"previous":"BLOCK | FOLDER","flag":"BLOCK | FOLDER | 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Eelco\n Dolstra\n \n \n Delft University of Technology\n Department of Software Technology\n \n Author\n \n \n \n Rob\n Vermaas\n \n \n Delft University of Technology\n Department of Software Technology\n \n Author\n \n"},{"Del":" \n \n Eelco\n Visser\n \n \n Delft University of Technology\n Department of Software Technology\n \n Author\n \n"},{"Del":" \n \n Ludovic\n Courtès\n \n Author\n \n"},{"Del":" \n\n\n \n"},{"Del":" 2009-2013\n"},{"Del":" Eelco Dolstra\n \n\n March 2010\n"},{"Del":"\n"},{"Del":" \n\n \n \n"},{"Del":" \n"},{"Del":" \n"},{"Del":" \n"},{"Del":"\n\n"},{"Del":"\n"}]}},{"FileDel":{"deleted_names":[{"basename":"installation.xml","metadata":0}],"del":{"EdgeMap":{"edges":[{"previous":"BLOCK | FOLDER","flag":"BLOCK | FOLDER | DELETED","from":{"change":14,"pos":18},"to":{"change":14,"start":3754,"end":3794},"introduced_by":14},{"previous":"BLOCK | FOLDER","flag":"BLOCK | FOLDER | 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\n Prerequisites\n"},{"Del":" \n"},{"Del":" To install and use Hydra you need to have installed the following dependencies:\n"},{"Del":"\n"},{"Del":" \n"},{"Del":" Nix\n"},{"Del":" PostgreSQL\n"},{"Del":" many Perl packages, notably Catalyst, EmailSender,\n"},{"Del":" and NixPerl (see the Hydra\n"},{"Del":" expression in Nixpkgs for the complete\n"},{"Del":" list)\n"},{"Del":" \n"},{"Del":"\n"},{"Del":" At the moment, Hydra runs only on GNU/Linux\n (i686-linux and\n x86_64_linux).\n \n"},{"Del":"\n"},{"Del":" \n For small projects, Hydra can be run on any reasonably modern\n machine. For individual projects you can even run Hydra on a\n laptop. However, the charm of a buildfarm server is usually that\n it operates without disturbing the developer's working\n environment and can serve releases over the internet. In\n conjunction you should typically have your source code\n administered in a version management system, such as\n subversion. Therefore, you will probably want to install a\n server that is connected to the internet. To scale up to large\n and/or many projects, you will need at least a considerable\n amount of diskspace to store builds. Since Hydra can schedule\n multiple simultaneous build jobs, it can be useful to have a\n multi-core machine, and/or attach multiple build machines in a\n network to the central Hydra server.\n \n"},{"Del":"\n"},{"Del":" \n"},{"Del":" Of course we think it is a good idea to use the NixOS GNU/Linux\n distribution for your buildfarm server. But this is not a\n requirement. The Nix software deployment system can be\n installed on any GNU/Linux distribution in parallel to the\n regular package management system. Thus, you can use Hydra on a\n Debian, Fedora, SuSE, or Ubuntu system.\n"},{"Del":" \n"},{"Del":"\n"},{"Del":"

\n"},{"Del":"\n"},{"Del":"

\n Getting Nix\n"},{"Del":"\n"},{"Del":" \n If your server runs NixOS you are all set to continue with\n installation of Hydra. Otherwise you first need to install Nix.\n The latest stable version can be found one the Nix web\n site, along with a manual, which includes installation\n instructions.\n \n

\n"},{"Del":"\n"},{"Del":"

\n Installation\n"},{"Del":"\n"},{"Del":" \n Hydra can be installed using Nixpkgs:\n"},{"Del":"\n"},{"Del":" \n"},{"Del":"nix-env -f /path/to/nixpkgs -iA hydra\n"},{"Del":"\n"},{"Del":" This makes the tools available in your Nix user environment,\n $HOME/.nix-profile by default.\n \n"},{"Del":"-->\n"},{"Del":"\n"},{"Del":" \n"},{"Del":" The latest development snapshot of Hydra can be installed\n"},{"Del":" by visiting the URL http://hydra.nixos.org/view/hydra/unstable\n"},{"Del":" and using the one-click install available at one of the build\n"},{"Del":" pages. You can also install Hydra through the channel by\n performing the following commands:\n"},{"Del":"\n\n"},{"Del":"nix-channel --add http://hydra.nixos.org/jobset/hydra/master/channel/latest\n"},{"Del":"nix-channel --update\nnix-env -i hydra\n"},{"Del":" \n"},{"Del":"\n"},{"Del":" \n"},{"Del":" Command completion should reveal a number of command-line tools\n from Hydra, such as hydra-queue-runner.\n"},{"Del":" \n

\n"},{"Del":"\n"},{"Del":"

\n Creating the database\n \n"},{"Del":" Hydra stores its results in a PostgreSQL database.\n"},{"Del":" \n\n \n To setup a PostgreSQL database with hydra\n"},{"Del":" as database name and user name, issue the following commands on\n the PostgreSQL server:\n"},{"Del":"\n"},{"Del":" \n"},{"Del":"createuser -S -D -R -P hydra\ncreatedb -O hydra hydra\n"},{"Del":"\n Note that $prefix is the location of Hydra\n in the nix store.\n \n"},{"Del":"\n"},{"Del":" \n"},{"Del":" Hydra uses an environment variable to know which database should\n be used, and a variable which point to a location that holds\n some state. To set these variables for a PostgreSQL database,\n add the following to the file ~/.profile of\n the user running the Hydra services.\n"},{"Del":"\n"},{"Del":" \n"},{"Del":"export HYDRA_DBI=\"dbi:Pg:dbname=hydra;host=dbserver.example.org;user=hydra;\"\nexport HYDRA_DATA=/var/lib/hydra\n\n You can provide the username and password in the file\n ~/.pgpass, e.g.\n\n \ndbserver.example.org:*:hydra:hydra:password\n\n Make sure that the HYDRA_DATA directory\n exists and is writable for the user which will run the Hydra\n"},{"Del":" services.\n"},{"Del":" \n"},{"Del":"\n"},{"Del":" \n"},{"Del":" Having set these environment variables, you can now initialise\n the database by doing:\n \nhydra-init\n \n\n \n"},{"Del":" To create projects, you need to create a user with\n admin privileges. This can be done using\n the command hydra-create-user:\n\n\n$ hydra-create-user alice --full-name 'Alice Q. User' \\\n --email-address 'alice@example.org' --password foobar --role admin\n\n"},{"Del":"\n"},{"Del":" Additional users can be created through the web interface.\n"},{"Del":" \n"},{"Del":"\n"},{"Del":"

\n\n

\n Upgrading\n"},{"Del":"\n"},{"Del":" \n"},{"Del":"hydra-init\n \n"},{"Del":"\n"},{"Del":"

\n"},{"Del":"\n"},{"Del":"

\n Getting Started\n"},{"Del":"\n"},{"Del":" \n"},{"Del":" To start the Hydra web server, execute:\n"},{"Del":" \n"},{"Del":"hydra-server\n"},{"Del":"\n"},{"Del":" When the server is started, you can browse to\n http://localhost:3000/ to start configuring\n your Hydra instance.\n \n"},{"Del":"\n"},{"Del":" \n The hydra-server command launches the web\n server. There are two other processes that come into play:\n"},{"Del":"\n"},{"Del":" \n \n The evaluator is responsible for\n"},{"Del":" periodically evaluating job sets, checking out their\n"},{"Del":" dependencies off their version control systems (VCS), and\n queueing new builds if the result of the evaluation changed.\n It is launched by the hydra-evaluator\n command.\n \n \n The queue runner launches builds (using\n Nix) as they are queued by the evaluator, scheduling them\n onto the configured Nix hosts. It is launched using the\n hydra-queue-runner command.\n \n \n"},{"Del":"\n"},{"Del":" All three processes must be running for Hydra to be fully\n functional, though it's possible to temporarily stop any one of\n them for maintenance purposes, for instance.\n \n"},{"Del":"\n"},{"Del":"

\n"},{"Del":"\n

\n Serving behind reverse proxy \n\n \n To serve hydra web server behind reverse proxy like\n nginx or httpd some\n additional configuration must be made.\n \n\n \n Edit your hydra.conf file in a similar way to\n this example:\n\n \nusing_frontend_proxy 1\nbase_uri example.com\n\n base_uri should be your hydra servers proxied URL.\n\n If you are using Hydra nixos module then setting hydraURL\n option should be enough.\n\n \n\n \n\n If you want to serve Hydra with a prefix path, for example\n http://example.com/hydra then you need to configure your\n reverse proxy to pass X-Request-Base to hydra, with\n prefix path as value.\n\n For example if you are using nginx, then use configuration similar to following:\n \nserver {\n listen 433 ssl;\n server_name example.com;\n .. other configuration ..\n location /hydra/ {\n"},{"Del":"\n"},{"Del":" proxy_pass http://127.0.0.1:3000;\n proxy_redirect http://127.0.0.1:3000 https://example.com/hydra;\n\n proxy_set_header Host $host;\n proxy_set_header X-Real-IP $remote_addr;\n proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;\n proxy_set_header X-Forwarded-Proto $scheme;\n proxy_set_header X-Request-Base /hydra;\n }\n}\n"},{"Del":"\n"},{"Del":" \n"},{"Del":"

\n"},{"Del":"\n"},{"Del":"\n\n"},{"Del":"\n \ncredential:\n class: Password\n password_field: password\n password_type: self_check\nstore:\n class: LDAP\n ldap_server: localhost\n ldap_server_options.timeout: 30\n binddn: \"cn=root,dc=example\"\n bindpw: notapassword\n start_tls: 0\n start_tls_options\n verify: none\n user_basedn: \"ou=users,dc=example\"\n user_filter: \"(&(objectClass=inetOrgPerson)(cn=%s))\"\n user_scope: one\n user_field: cn\n user_search_options:\n deref: always\n use_roles: 1\n role_basedn: \"ou=groups,dc=example\"\n role_filter: \"(&(objectClass=groupOfNames)(member=%s))\"\n role_scope: one\n role_field: cn\n role_value: dn\n role_search_options:\n deref: always\n \n"},{"Del":" \n Roles can be assigned to users based on their LDAP group membership\n (use_roles: 1 in the below example).\n For a user to have the role admin assigned to them\n they should be in the group hydra_admin. In general\n any LDAP group of the form hydra_some_role\n (notice the hydra_ prefix) will work.\n"},{"Del":"\n \n \n

\n Using LDAP as authentication backend (optional)\n \n Instead of using Hydra's built-in user management you can optionally use LDAP to manage roles and users.\n \n\n \n The hydra-server accepts the environment\n variable HYDRA_LDAP_CONFIG. The value of\n the variable should point to a valid YAML file containing the\n Catalyst LDAP configuration. The format of the configuration\n file is describe in the\n \n Catalyst::Authentication::Store::LDAP documentation.\n An example is given below.\n \n"},{"Del":" If you're upgrading Hydra from a previous version, you\n should do the following to perform any necessary database schema migrations:\n"},{"Del":"\n"},{"Del":"\n Introduction\n\n

\n About Hydra\n\n \n Hydra is a tool for continuous integration testing and software\n release that uses a purely functional language to describe build jobs\n and their dependencies. Continuous integration is a simple technique\n to improve the quality of the software development process. An\n automated system continuously or periodically checks out the source\n code of a project, builds it, runs tests, and produces reports for the\n developers. Thus, various errors that might accidentally be committed\n into the code base are automatically caught. Such a system allows\n more in-depth testing than what developers could feasibly do manually:\n\n \n"},{"Del":" Portability testing: The\n software may need to be built and tested on many different\n platforms. It is infeasible for each developer to do this\n before every commit.\n \n"},{"Del":"\n"},{"Del":" Likewise, many projects have very large test sets\n (e.g., regression tests in a compiler, or stress tests in a\n DBMS) that can take hours or days to run to completion.\n \n"},{"Del":"\n"},{"Del":" Many kinds of static and dynamic analyses can be\n performed as part of the tests, such as code coverage runs and\n static analyses.\n \n"},{"Del":"\n"},{"Del":" It may also be necessary to build many different\n variants of the software. For instance,\n it may be necessary to verify that the component builds with\n various versions of a compiler.\n \n"},{"Del":"\n"},{"Del":" Developers typically use incremental building to\n test their changes (since a full build may take too long), but\n this is unreliable with many build management tools (such as\n Make), i.e., the result of the incremental build might differ\n from a full build.\n \n"},{"Del":"\n"},{"Del":" It ensures that the software can be built from the\n sources under revision control. Users of version management\n systems such as CVS and Subversion often forget to place\n source files under revision control.\n \n"},{"Del":"\n"},{"Del":" The machines on which the continuous integration\n system runs ideally provides a clean, well-defined build\n environment. If this environment is administered through\n proper SCM techniques, then builds produced by the system can\n be reproduced. In contrast, developer work environments are\n typically not under any kind of SCM control.\n \n"},{"Del":"\n"},{"Del":" In large projects, developers often work on a\n particular component of the project, and do not build and test\n the composition of those components (again since this is\n likely to take too long). To prevent the phenomenon of ``big\n bang integration'', where components are only tested together\n near the end of the development process, it is important to\n test components together as soon as possible (hence\n continuous integration).\n \n"},{"Del":"\n"},{"Del":" It allows software to be\n released by automatically creating\n packages that users can download and install. To do this\n manually represents an often prohibitive amount of work, as\n one may want to produce releases for many different platforms:\n e.g., installers for Windows and Mac OS X, RPM or Debian\n packages for certain Linux distributions, and so on.\n \n"},{"Del":"\n \n \n\n \n In its simplest form, a continuous integration tool sits in a\n loop building and releasing software components from a version\n management system. For each component, it performs the\n following tasks:\n\n \n\n"},{"Del":" It obtains the latest version of the component's\n source code from the version management system.\n \n"},{"Del":"\n"},{"Del":" It runs the component's build process (which\n presumably includes the execution of the component's test\n set).\n \n"},{"Del":"\n"},{"Del":" It presents the results of the build (such as error\n logs and releases) to the developers, e.g., by producing a web\n page.\n \n"},{"Del":"\n \n\n Examples of continuous integration tools include Jenkins,\n CruiseControl Tinderbox, Sisyphus, Anthill and BuildBot. These\n tools have various limitations.\n\n \n"}]}},{"FileDel":{"deleted_names":[{"basename":"projects.xml","metadata":0}],"del":{"EdgeMap":{"edges":[{"previous":"BLOCK | FOLDER","flag":"BLOCK | FOLDER | DELETED","from":{"change":14,"pos":18},"to":{"change":14,"start":5265,"end":5301},"introduced_by":14},{"previous":"BLOCK | FOLDER","flag":"BLOCK | FOLDER | DELETED","from":{"change":14,"pos":5301},"to":{"change":14,"start":114,"end":114},"introduced_by":14}],"inode":{"change":14,"pos":114}}},"content_edges":{"edges":[{"previous":"BLOCK","flag":"BLOCK | DELETED","from":{"change":14,"pos":114},"to":{"change":14,"start":115,"end":214},"introduced_by":14},{"previous":"BLOCK","flag":"BLOCK | DELETED","from":{"change":14,"pos":214},"to":{"change":14,"start":3882,"end":3934},"introduced_by":14},{"previous":"","flag":"DELETED","from":{"change":14,"pos":3934},"to":{"change":14,"start":214,"end":1279},"introduced_by":14},{"previous":"BLOCK","flag":"BLOCK | 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Managing Projects\n\n \n Once Hydra is installed and running, the next step is to add\n projects to the build farm. We follow the example of the Patchelf\n project, a software tool written in C and using the GNU\n Build System (GNU Autoconf and GNU Automake).\n \n\n \n Log in to the web interface of your Hydra installation using the\n user name and password you inserted in the database (by default,\n Hydra's web server listens on localhost:3000).\n Then follow the \"Create Project\" link to create a new project.\n \n\n

\n Project Information\n\n \n A project definition consists of some general information and a\n set of job sets. The general information identifies a project,\n its owner, and current state of activity.\n\n Here's what we fill in for the patchelf project:\n\n"},{"Del":"\nIdentifier: patchelf\n\n"},{"Del":"\n The identifier is the identity of the\n project. It is used in URLs and in the names of build results.\n \n\n \n The identifier should be a unique name (it is the primary\n database key for the project table in the database). If you try\n to create a project with an already existing identifier you'd\n"},{"Del":" get an error message from the database.\n"},{"Del":"\n"},{"Del":" So try to create the project after entering just the general\n information to figure out if you have chosen a unique name.\n Job sets can be added once the project has been created.\n"},{"Del":"\n\n"},{"Del":"Display name: Patchelf\n"},{"Del":"\n\n The display name is used in menus.\n\n\n"},{"Del":"Description: A tool for modifying ELF binaries\n"},{"Del":"\n\n The description is used as short\n documentation of the nature of the project.\n\n\n"},{"Del":"Owner: eelco\n"},{"Del":"\n\n The owner of a project can create and edit\n job sets.\n\n\n"},{"Del":"Enabled: Yes\n"},{"Del":"\n\n Only if the project is enabled are builds\n performed.\n \n\n \n Once created there should be an entry for the project in the\n sidebar. Go to the project page for the Patchelf\n project.\n \n

\n\n

\n Job Sets\n\n \n A project can consist of multiple job sets\n (hereafter jobsets), separate tasks that\n can be built separately, but may depend on each other (without\n cyclic dependencies, of course). Go to the Edit\n page of the Patchelf project and \"Add a new jobset\" by providing\n the following \"Information\":\n\n\n"},{"Del":"Identifier: trunk\nDescription: Trunk\nNix expression: release.nix in input patchelfSrc\n"},{"Del":"\n\n This states that in order to build the trunk\n jobset, the Nix expression in the file\n release.nix, which can be obtained from\n input patchelfSrc, should be\n evaluated. (We'll have a look at\n release.nix later.)\n\n \n\n \n To realize a job we probably need a number of inputs, which can\n be declared in the table below. As many inputs as required can\n be added. For patchelf we declare the following inputs.\n\n\n"},{"Del":"patchelfSrc\n"},{"Del":"'Git checkout' https://github.com/NixOS/patchelf\n"},{"Del":"\n"},{"Del":"nixpkgs 'Git checkout' https://github.com/NixOS/nixpkgs\n"},{"Del":"\n"},{"Del":"officialRelease Boolean false\n"},{"Del":"\n"},{"Del":"system String value \"i686-linux\"\n"},{"Del":"\n \n

\n\n

\n"},{"Del":" Building Jobs\n

\n\n

\n"},{"Del":" Build Recipes\n\n \n Build jobs and build recipes for a jobset are\n specified in a text file written in the Nix language. The\n recipe is actually called a Nix expression in\n Nix parlance. By convention this file is often called\n release.nix.\n \n"},{"Del":"\n"},{"Del":" \n The release.nix file is typically kept under\n version control, and the repository that contains it one of the\n build inputs of the corresponding–often called\n hydraConfig by convention. The repository for\n that file and the actual file name are specified on the web\n interface of Hydra under the Setup tab of the\n jobset's overview page, under the Nix\n expression heading. See, for example, the jobset\n overview page of the PatchELF project, and \n"},{"Del":" the corresponding Nix file.\n \n"},{"Del":"\n"},{"Del":"\n"},{"Del":"\n"},{"Del":" jobs = rec { \n\n tarball = \n"},{"Del":" pkgs.releaseTools.sourceTarball { \n name = \"hello-tarball\";\n"},{"Del":" src = <hello>; \n"},{"Del":" buildInputs = (with pkgs; [ gettext texLive texinfo ]);\n };\n\n build = \n"},{"Del":" { system ? builtins.currentSystem }: \n"},{"Del":"\n"},{"Del":" let pkgs = import <nixpkgs> { inherit system; }; in\n"},{"Del":" pkgs.releaseTools.nixBuild { \n"},{"Del":" name = \"hello\";\n"},{"Del":" src = jobs.tarball;\n"},{"Del":" configureFlags = [ \"--disable-silent-rules\" ];\n"},{"Del":" };\n };\nin\n"},{"Del":" jobs \n"},{"Del":" \n \n\n \n shows what a\n release.nix file for GNU Hello\n"},{"Del":" would look like. GNU Hello is representative of many GNU\n"},{"Del":" and non-GNU free software projects:\n\n \n"},{"Del":" it uses the GNU Build System, namely GNU Autoconf,\n and GNU Automake; for users, it means it can be installed\n using the usual\n ./configure && make install\n procedure;\n \n it uses Gettext for internationalization;\n it has a Texinfo manual, which can be rendered as PDF\n with TeX.\n"},{"Del":" \n\n The file defines a jobset consisting of two jobs:\n tarball, and build. It\n contains the following elements (referenced from the figure by\n numbers):\n\n \n\n"},{"Del":" \n"},{"Del":" \n"},{"Del":" This defines a variable pkgs holding\n the set of packages provided by Nixpkgs.\n"},{"Del":" \n \n"},{"Del":" Since nixpkgs appears in angle brackets,\n there must be a build input of that name in the Nix search\n path. In this case, the web interface should show a\n nixpkgs build input, which is a checkout\n of the Nixpkgs source code repository; Hydra then adds this\n and other build inputs to the Nix search path when\n evaluating release.nix.\n"},{"Del":" \n \n"},{"Del":"\n"},{"Del":" \n \n This defines a variable holding the two Hydra\n jobs–an attribute set in Nix.\n \n \n"},{"Del":"\n"},{"Del":" \n \n This is the definition of the first job, named\n tarball. The purpose of this job is to\n produce a usable source code tarball.\n"},{"Del":" \n \n \n \n The tarball job calls the\n sourceTarball function, which (roughly)\n runs autoreconf && ./configure &&\n make dist on the checkout. The\n buildInputs attribute specifies\n"},{"Del":" additional software dependencies for the\n jobThe package names used in\n buildInputs–e.g.,\n texLive–are the names of the\n attributes corresponding to these\n packages in Nixpkgs, specifically in the all-packages.nix\n"},{"Del":" file. See the section entitled “Package Naming” in the\n Nixpkgs manual for more information..\n"},{"Del":" \n \n"},{"Del":" \n \n The tarball jobs expects a\n hello build input to be available in the\n Nix search path. Again, this input is passed by Hydra and\n is meant to be a checkout of GNU Hello's source code\n repository.\n \n \n"},{"Del":"\n"},{"Del":" \n \n This is the definition of the build\n job, whose purpose is to build Hello from the tarball\n produced above.\n \n \n \n \n"},{"Del":" The build function takes one\n parameter, system, which should be a string\n"},{"Del":" defining the Nix system type–e.g.,\n"},{"Del":" \"x86_64-linux\". Additionally, it refers\n to jobs.tarball, seen above.\n"},{"Del":" \n \n"},{"Del":" Hydra inspects the formal argument list of the function\n (here, the system argument) and passes it\n the corresponding parameter specified as a build input on\n Hydra's web interface. Here, system is\n passed by Hydra when it calls build.\n Thus, it must be defined as a build input of type string in\n Hydra, which could take one of several values.\n"},{"Del":" \n \n"},{"Del":" The question mark after system defines\n the default value for this argument, and is only useful when\n debugging locally.\n"},{"Del":" \n \n \n \n The build job calls the\n nixBuild function, which unpacks the\n tarball, then runs ./configure && make\n && make check && make install.\n \n \n"},{"Del":"\n"},{"Del":" \n \n Finally, the set of jobs is returned to Hydra, as a Nix\n attribute set.\n \n \n"},{"Del":" \n \n"},{"Del":"

\n\n

\n"},{"Del":" Building from the Command Line\n\n \n It is often useful to test a build recipe, for instance before\n it is actually used by Hydra, when testing changes, or when\n debugging a build issue. Since build recipes for Hydra jobsets\n are just plain Nix expressions, they can be evaluated using the\n standard Nix tools.\n \n\n \n To evaluate the tarball jobset of , just run:\n\n"},{"Del":"\n$ nix-build release.nix -A tarball\n\n"},{"Del":"\n However, doing this with as is will\n probably yield an error like this:\n\n"},{"Del":"\n"},{"Del":"error: user-thrown exception: file `hello' was not found in the Nix search path (add it using $NIX_PATH or -I)\n"},{"Del":"\n"},{"Del":"\n"},{"Del":" The error is self-explanatory. Assuming\n $HOME/src/hello points to a checkout of\n Hello, this can be fixed this way:\n"},{"Del":"\n"},{"Del":"\n$ nix-build -I ~/src release.nix -A tarball\n\n"},{"Del":"\n Similarly, the build jobset can be evaluated:\n\n"},{"Del":"\n$ nix-build -I ~/src release.nix -A build\n\n"},{"Del":"\n The build job reuses the result of the\n tarball job, rebuilding it only if it needs to.\n \n"},{"Del":"\n"},{"Del":"

\n\n

\n Adding More Jobs\n\n \n illustrates how to write the most\n basic jobs, tarball and\n build. In practice, much more can be done by\n using features readily provided by Nixpkgs or by creating new jobs\n as customizations of existing jobs.\n \n\n \n For instance, test coverage report for projects compiled with GCC\n can be automatically generated using the\n coverageAnalysis function provided by Nixpkgs\n instead of nixBuild. Back to our GNU Hello\n example, we can define a coverage job that\n produces an HTML code coverage report directly readable from the\n corresponding Hydra build page:\n\n"},{"Del":"\ncoverage =\n"},{"Del":" { system ? builtins.currentSystem }:\n"},{"Del":"\n"},{"Del":" let pkgs = import nixpkgs { inherit system; }; in\n pkgs.releaseTools.coverageAnalysis {\n name = \"hello\";\n"},{"Del":" src = jobs.tarball;\n"},{"Del":" configureFlags = [ \"--disable-silent-rules\" ];\n };\n\n"},{"Del":"\n As can be seen, the only difference compared to\n build is the use of\n coverageAnalysis.\n \n\n \n Nixpkgs provides many more build tools, including the ability to\n run build in virtual machines, which can themselves run another\n GNU/Linux distribution, which allows for the creation of packages\n for these distributions. Please see the\n"},{"Del":" pkgs/build-support/release directory\n of Nixpkgs for more. The NixOS manual also contains information\n about whole-system testing in virtual machine.\n \n\n \n Now, assume we want to build Hello with an old version of GCC, and\n with different configure flags. A new\n build_exotic job can be written that simply\n overrides the relevant arguments passed to\n nixBuild:\n"},{"Del":"\n"},{"Del":"

\n"},{"Del":"\n"},{"Del":"\n\n"},{"Del":"\n"},{"Del":" \n"},{"Del":"\n

\n Email Notifications\n \n Hydra can send email notifications when the status of a build changes. This provides\n immediate feedback to maintainers or committers when a change causes build failures.\n \n\n \n The simplest approach to enable Email Notifications is to use the ssmtp package, which\n simply hands off the emails to another SMTP server. For details on how to configure ssmtp,\n see the documentation for the networking.defaultMailServer option.\n To use ssmtp for the Hydra email notifications, add it to the path option of the Hydra services\n in your /etc/nixos/configuration.nix file:\n\nsystemd.services.hydra-queue-runner.path = [ pkgs.ssmtp ];\nsystemd.services.hydra-server.path = [ pkgs.ssmtp ];\n\n \n

\n"},{"Del":"\n"},{"Del":"\nbuild_exotic =\n"},{"Del":" { system ? builtins.currentSystem }:\n"},{"Del":"\n"},{"Del":" let\n pkgs = import nixpkgs { inherit system; };\n"},{"Del":" build = jobs.build { inherit system; };\n"},{"Del":" in\n pkgs.lib.overrideDerivation build (attrs: {\n buildInputs = [ pkgs.gcc33 ];\n preConfigure = \"gcc --version\";\n configureFlags =\n attrs.configureFlags ++ [ \"--disable-nls\" ];\n });\n\n"},{"Del":"\n The build_exotic job reuses\n build and overrides some of its arguments: it\n adds a dependency on GCC 3.3, a pre-configure phase that runs\n gcc --version, and adds the\n --disable-nls configure flags.\n \n\n \n This customization mechanism is very powerful. For instance, it\n can be used to change the way Hello and all\n its dependencies–including the C library and compiler used to\n build it–are built. See the Nixpkgs manual for more.\n \n\n"},{"Del":" \n <filename>release.nix</filename> file for GNU Hello\n \n"},{"Del":"let\n"},{"Del":" pkgs = import <nixpkgs> {}; \n"},{"Del":" \n Knowledge of the Nix language is recommended, but the example\n below should already give a good idea of how it works:\n \n"}]}},{"FileDel":{"deleted_names":[{"basename":"api.xml","metadata":0}],"del":{"EdgeMap":{"edges":[{"previous":"BLOCK | FOLDER","flag":"BLOCK | FOLDER | DELETED","from":{"change":14,"pos":18},"to":{"change":14,"start":7310,"end":7341},"introduced_by":14},{"previous":"BLOCK | FOLDER","flag":"BLOCK | FOLDER | DELETED","from":{"change":14,"pos":7341},"to":{"change":14,"start":1,"end":1},"introduced_by":14}],"inode":{"change":14,"pos":1}}},"content_edges":{"edges":[{"previous":"BLOCK","flag":"BLOCK | DELETED","from":{"change":14,"pos":1},"to":{"change":14,"start":2,"end":1654},"introduced_by":14},{"previous":"BLOCK","flag":"BLOCK | DELETED","from":{"change":14,"pos":1674},"to":{"change":14,"start":1674,"end":1935},"introduced_by":14},{"previous":"BLOCK","flag":"BLOCK | DELETED","from":{"change":14,"pos":1955},"to":{"change":14,"start":1955,"end":2942},"introduced_by":14},{"previous":"BLOCK","flag":"BLOCK | DELETED","from":{"change":14,"pos":2942},"to":{"change":11,"start":0,"end":19},"introduced_by":11},{"previous":"","flag":"DELETED","from":{"change":11,"pos":19},"to":{"change":14,"start":2979,"end":6955},"introduced_by":11},{"previous":"BLOCK","flag":"BLOCK | DELETED","from":{"change":14,"pos":2979},"to":{"change":14,"start":2979,"end":6955},"introduced_by":14},{"previous":"BLOCK","flag":"BLOCK | DELETED","from":{"change":14,"pos":6979},"to":{"change":14,"start":6979,"end":7309},"introduced_by":14}],"inode":{"change":14,"pos":1}},"content":[{"Del":"\n\n Using the external API\n\n \n To be able to create integrations with other services, Hydra exposes\n an external API that you can manage projects with.\n \n\n \n The API is accessed over HTTP(s) where all data is sent and received\n as JSON.\n \n\n \n Creating resources requires the caller to be authenticated, while\n retrieving resources does not.\n \n\n \n The API does not have a separate URL structure for it's endpoints.\n Instead you request the pages of the web interface as\n application/json to use the API.\n \n\n

\n List projects\n\n \n To list all the projects of the Hydra install:\n \n\n\nGET /\nAccept: application/json\n\n\n \n This will give you a list of projects, where each\n project contains general information and a list\n of its job sets.\n \n\n \n Example\n \n\n\ncurl -i -H 'Accept: application/json' \\\n https://hydra.nixos.org\n\n\n \n Note: this response is truncated\n \n\n\nGET https://hydra.nixos.org/\nHTTP/1.1 200 OK\nContent-Type: application/json\n\n[\n {\n \"displayname\": \"Acoda\",\n \"name\": \"acoda\",\n"},{"Del":" \"description\": \"Acoda is a tool set for automatic data migration along an evolving data model\",\n \"enabled\": 0,\n \"owner\": \"sander\",\n \"hidden\": 1,\n \"jobsets\": [\n \"trunk\"\n ]\n },\n {\n \"displayname\": \"cabal2nix\",\n \"name\": \"cabal2nix\",\n"},{"Del":" \"description\": \"Convert Cabal files into Nix build instructions\",\n \"enabled\": 0,\n \"owner\": \"simons@cryp.to\",\n \"hidden\": 1,\n \"jobsets\": [\n \"master\"\n ]\n }\n]\n\n

\n\n

\n Get a single project\n\n \n To get a single project by identifier:\n \n\n\nGET /project/:project-identifier\nAccept: application/json\n\n\n \n Example\n \n\n\ncurl -i -H 'Accept: application/json' \\\n https://hydra.nixos.org/project/hydra\n\n\n\nGET https://hydra.nixos.org/project/hydra\nHTTP/1.1 200 OK\nContent-Type: application/json\n\n{\n \"description\": \"Hydra, the Nix-based continuous build system\",\n \"hidden\": 0,\n \"displayname\": \"Hydra\",\n \"jobsets\": [\n \"hydra-master\",\n \"hydra-ant-logger-trunk\",\n \"master\",\n \"build-ng\"\n ],\n \"name\": \"hydra\",\n \"enabled\": 1,\n"},{"Del":" \"owner\": \"eelco\"\n"},{"Del":"}\n\n\n

\n\n

\n Get a single job set\n\n \n To get a single job set by identifier:\n \n\n\nGET /jobset/:project-identifier/:jobset-identifier\nContent-Type: application/json\n\n\n \n Example\n \n\n\ncurl -i -H 'Accept: application/json' \\\n https://hydra.nixos.org/jobset/hydra/build-ng\n\n\n\nGET https://hydra.nixos.org/jobset/hydra/build-ng\nHTTP/1.1 200 OK\nContent-Type: application/json\n\n{\n \"errormsg\": \"evaluation failed due to signal 9 (Killed)\",\n \"fetcherrormsg\": null,\n \"nixexprpath\": \"release.nix\",\n \"nixexprinput\": \"hydraSrc\",\n \"emailoverride\": \"rob.vermaas@gmail.com, eelco.dolstra@logicblox.com\",\n \"jobsetinputs\": {\n \"officialRelease\": {\n \"jobsetinputalts\": [\n \"false\"\n ]\n },\n \"hydraSrc\": {\n \"jobsetinputalts\": [\n \"https://github.com/NixOS/hydra.git build-ng\"\n ]\n },\n \"nixpkgs\": {\n \"jobsetinputalts\": [\n \"https://github.com/NixOS/nixpkgs.git release-14.12\"\n ]\n }\n },\n \"enabled\": 0\n}\n\n

\n\n

\n List evaluations\n\n \n To list the evaluations of a\n job set by identifier:\n \n\n\nGET /jobset/:project-identifier/:jobset-identifier/evals\nContent-Type: application/json\n\n\n \n Example\n \n\n\ncurl -i -H 'Accept: application/json' \\\n https://hydra.nixos.org/jobset/hydra/build-ng/evals\n\n\n \n Note: this response is truncated\n \n\n\nGET https://hydra.nixos.org/jobset/hydra/build-ng/evals\nHTTP/1.1 200 OK\nContent-Type: application/json\n\n{\n \"evals\": [\n {\n \"jobsetevalinputs\": {\n \"nixpkgs\": {\n \"dependency\": null,\n \"type\": \"git\",\n \"value\": null,\n \"uri\": \"https://github.com/NixOS/nixpkgs.git\",\n \"revision\": \"f60e48ce81b6f428d072d3c148f6f2e59f1dfd7a\"\n },\n \"hydraSrc\": {\n \"dependency\": null,\n \"type\": \"git\",\n \"value\": null,\n \"uri\": \"https://github.com/NixOS/hydra.git\",\n \"revision\": \"48d6f0de2ab94f728d287b9c9670c4d237e7c0f6\"\n },\n \"officialRelease\": {\n \"dependency\": null,\n \"value\": \"false\",\n \"type\": \"boolean\",\n \"uri\": null,\n \"revision\": null\n }\n },\n \"hasnewbuilds\": 1,\n \"builds\": [\n 24670686,\n 24670684,\n 24670685,\n 24670687\n ],\n \"id\": 1213758\n }\n ],\n \"first\": \"?page=1\",\n \"last\": \"?page=1\"\n}\n\n

\n\n

\n Get a single build\n\n \n To get a single build by its id:\n \n\n\nGET /build/:build-id\nContent-Type: application/json\n\n\n \n Example\n \n\n\ncurl -i -H 'Accept: application/json' \\\n https://hydra.nixos.org/build/24670686\n\n\n\nGET /build/24670686\nHTTP/1.1 200 OK\nContent-Type: application/json\n\n{\n \"job\": \"tests.api.x86_64-linux\",\n \"jobsetevals\": [\n 1213758\n ],\n \"buildstatus\": 0,\n \"buildmetrics\": null,\n \"project\": \"hydra\",\n \"system\": \"x86_64-linux\",\n \"priority\": 100,\n \"releasename\": null,\n \"starttime\": 1439402853,\n \"nixname\": \"vm-test-run-unnamed\",\n \"timestamp\": 1439388618,\n \"id\": 24670686,\n \"stoptime\": 1439403403,\n \"jobset\": \"build-ng\",\n \"buildoutputs\": {\n \"out\": {\n \"path\": \"/nix/store/lzrxkjc35mhp8w7r8h82g0ljyizfchma-vm-test-run-unnamed\"\n }\n },\n \"buildproducts\": {\n \"1\": {\n \"path\": \"/nix/store/lzrxkjc35mhp8w7r8h82g0ljyizfchma-vm-test-run-unnamed\",\n"},{"Del":" \"defaultpath\": \"log.html\",\n \"type\": \"report\",\n \"sha256hash\": null,\n \"filesize\": null,\n \"name\": \"\",\n \"subtype\": \"testlog\"\n }\n },\n \"finished\": 1\n}\n\n

\n\n\n\n\n"}]}}],"owner":"grahamc","repo":"hydra","token":"c4hGQzEByJ98W7HEfxIL6pcqAZVuzU+AIoi0S3DManI=","login":null}

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