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https://github.com/sourcegraph/zoekt

Fast trigram based code search
https://github.com/sourcegraph/zoekt

repo-type-backend

Last synced: 11 days ago
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Fast trigram based code search

Lists

README 

        

    "Zoekt, en gij zult spinazie eten" - Jan Eertink



    ("seek, and ye shall eat spinach" - My primary school teacher)



This is a fast text search engine, intended for use with source

code. (Pronunciation: roughly as you would pronounce "zooked" in English)



**Note:** This is a [Sourcegraph](https://github.com/sourcegraph/zoekt) fork

of [github.com/google/zoekt](https://github.com/google/zoekt). It is now the

main maintained source of Zoekt.



# INSTRUCTIONS



## Downloading



    go get github.com/sourcegraph/zoekt/



## Indexing



### Directory



    go install github.com/sourcegraph/zoekt/cmd/zoekt-index

    $GOPATH/bin/zoekt-index .



### Git repository



    go install github.com/sourcegraph/zoekt/cmd/zoekt-git-index

    $GOPATH/bin/zoekt-git-index -branches master,stable-1.4 -prefix origin/ .



### Repo repositories



    go install github.com/sourcegraph/zoekt/cmd/zoekt-{repo-index,mirror-gitiles}

    zoekt-mirror-gitiles -dest ~/repos/ https://gfiber.googlesource.com

    zoekt-repo-index \

        -name gfiber \

        -base_url https://gfiber.googlesource.com/ \

        -manifest_repo ~/repos/gfiber.googlesource.com/manifests.git \

        -repo_cache ~/repos \

        -manifest_rev_prefix=refs/heads/ --rev_prefix= \

        master:default_unrestricted.xml



## Searching



### Web interface



    go install github.com/sourcegraph/zoekt/cmd/zoekt-webserver

    $GOPATH/bin/zoekt-webserver -listen :6070



### JSON API



You can retrieve search results as JSON by sending a GET request to zoekt-webserver.



    curl --get \

        --url "http://localhost:6070/search" \

        --data-urlencode "q=ngram f:READ" \

        --data-urlencode "num=50" \

        --data-urlencode "format=json"



The response data is a JSON object. You can refer to [web.ApiSearchResult](https://sourcegraph.com/github.com/sourcegraph/zoekt@6b1df4f8a3d7b34f13ba0cafd8e1a9b3fc728cf0/-/blob/web/api.go?L23:6&subtree=true) to learn about the structure of the object.



### CLI



    go install github.com/sourcegraph/zoekt/cmd/zoekt

    $GOPATH/bin/zoekt 'ngram f:READ'



## Installation

A more organized installation on a Linux server should use a systemd unit file,

eg.



    [Unit]

    Description=zoekt webserver



    [Service]

    ExecStart=/zoekt/bin/zoekt-webserver -index /zoekt/index -listen :443  --ssl_cert /zoekt/etc/cert.pem   --ssl_key /zoekt/etc/key.pem

    Restart=always



    [Install]

    WantedBy=default.target



# SEARCH SERVICE



Zoekt comes with a small service management program:



    go install github.com/sourcegraph/zoekt/cmd/zoekt-indexserver



    cat << EOF > config.json

    [{"GithubUser": "username"},

     {"GithubOrg": "org"},

     {"GitilesURL": "https://gerrit.googlesource.com", "Name": "zoekt" }

    ]

    EOF



    $GOPATH/bin/zoekt-indexserver -mirror_config config.json



This will mirror all repos under 'github.com/username', 'github.com/org', as

well as the 'zoekt' repository. It will index the repositories.



It takes care of fetching and indexing new data and cleaning up logfiles.



The webserver can be started from a standard service management framework, such

as systemd.



# SYMBOL SEARCH



It is recommended to install [Universal

ctags](https://github.com/universal-ctags/ctags) to improve

ranking. See [here](doc/ctags.md) for more information.



# ACKNOWLEDGEMENTS



Thanks to Han-Wen Nienhuys for creating Zoekt. Thanks to Alexander Neubeck for

coming up with this idea, and helping Han-Wen Nienhuys flesh it out.



# FORK DETAILS



Originally this fork contained some changes that do not make sense to upstream

and or have not yet been upstreamed. However, this is now the defacto source

for Zoekt. This section will remain for historical reasons and contains

outdated information. It can be removed once the dust settles on moving from

google/zoekt to sourcegraph/zoekt. Differences:



- [zoekt-sourcegraph-indexserver](cmd/zoekt-sourcegraph-indexserver/main.go)

  is a Sourcegraph specific command which indexes all enabled repositories on

  Sourcegraph, as well as keeping the indexes up to date.

- We have exposed the API via

  [keegancsmith/rpc](https://github.com/keegancsmith/rpc) (a fork of `net/rpc`

  which supports cancellation).

- Query primitive `BranchesRepos` to efficiently specify a set of repositories to

  search.

- Allow empty shard directories on startup. Needed when starting a fresh

  instance which hasn't indexed anything yet.

- We can return symbol/ctag data in results. Additionally we can run symbol regex queries.

- We search shards in order of repo name and ignore shard ranking.

- Other minor changes.



Assuming you have the gerrit upstream configured, a useful way to see what we

changed is:



``` shellsession

$ git diff gerrit/master -- ':(exclude)vendor/' ':(exclude)Gopkg*'

```



# DISCLAIMER



This is not an official Google product