add initial version of cgit-httpd

13 files changed, 813 insertions, 0 deletions

diff --git a/LICENSE b/LICENSE
new file mode 100644
index 0000000..a612ad9
--- /dev/null
+++ b/LICENSE
@@ -0,0 +1,373 @@
+Mozilla Public License Version 2.0
+==================================
+
+1. Definitions
+--------------
+
+1.1. "Contributor"
+    means each individual or legal entity that creates, contributes to
+    the creation of, or owns Covered Software.
+
+1.2. "Contributor Version"
+    means the combination of the Contributions of others (if any) used
+    by a Contributor and that particular Contributor's Contribution.
+
+1.3. "Contribution"
+    means Covered Software of a particular Contributor.
+
+1.4. "Covered Software"
+    means Source Code Form to which the initial Contributor has attached
+    the notice in Exhibit A, the Executable Form of such Source Code
+    Form, and Modifications of such Source Code Form, in each case
+    including portions thereof.
+
+1.5. "Incompatible With Secondary Licenses"
+    means
+
+    (a) that the initial Contributor has attached the notice described
+        in Exhibit B to the Covered Software; or
+
+    (b) that the Covered Software was made available under the terms of
+        version 1.1 or earlier of the License, but not also under the
+        terms of a Secondary License.
+
+1.6. "Executable Form"
+    means any form of the work other than Source Code Form.
+
+1.7. "Larger Work"
+    means a work that combines Covered Software with other material, in
+    a separate file or files, that is not Covered Software.
+
+1.8. "License"
+    means this document.
+
+1.9. "Licensable"
+    means having the right to grant, to the maximum extent possible,
+    whether at the time of the initial grant or subsequently, any and
+    all of the rights conveyed by this License.
+
+1.10. "Modifications"
+    means any of the following:
+
+    (a) any file in Source Code Form that results from an addition to,
+        deletion from, or modification of the contents of Covered
+        Software; or
+
+    (b) any new file in Source Code Form that contains any Covered
+        Software.
+
+1.11. "Patent Claims" of a Contributor
+    means any patent claim(s), including without limitation, method,
+    process, and apparatus claims, in any patent Licensable by such
+    Contributor that would be infringed, but for the grant of the
+    License, by the making, using, selling, offering for sale, having
+    made, import, or transfer of either its Contributions or its
+    Contributor Version.
+
+1.12. "Secondary License"
+    means either the GNU General Public License, Version 2.0, the GNU
+    Lesser General Public License, Version 2.1, the GNU Affero General
+    Public License, Version 3.0, or any later versions of those
+    licenses.
+
+1.13. "Source Code Form"
+    means the form of the work preferred for making modifications.
+
+1.14. "You" (or "Your")
+    means an individual or a legal entity exercising rights under this
+    License. For legal entities, "You" includes any entity that
+    controls, is controlled by, or is under common control with You. For
+    purposes of this definition, "control" means (a) the power, direct
+    or indirect, to cause the direction or management of such entity,
+    whether by contract or otherwise, or (b) ownership of more than
+    fifty percent (50%) of the outstanding shares or beneficial
+    ownership of such entity.
+
+2. License Grants and Conditions
+--------------------------------
+
+2.1. Grants
+
+Each Contributor hereby grants You a world-wide, royalty-free,
+non-exclusive license:
+
+(a) under intellectual property rights (other than patent or trademark)
+    Licensable by such Contributor to use, reproduce, make available,
+    modify, display, perform, distribute, and otherwise exploit its
+    Contributions, either on an unmodified basis, with Modifications, or
+    as part of a Larger Work; and
+
+(b) under Patent Claims of such Contributor to make, use, sell, offer
+    for sale, have made, import, and otherwise transfer either its
+    Contributions or its Contributor Version.
+
+2.2. Effective Date
+
+The licenses granted in Section 2.1 with respect to any Contribution
+become effective for each Contribution on the date the Contributor first
+distributes such Contribution.
+
+2.3. Limitations on Grant Scope
+
+The licenses granted in this Section 2 are the only rights granted under
+this License. No additional rights or licenses will be implied from the
+distribution or licensing of Covered Software under this License.
+Notwithstanding Section 2.1(b) above, no patent license is granted by a
+Contributor:
+
+(a) for any code that a Contributor has removed from Covered Software;
+    or
+
+(b) for infringements caused by: (i) Your and any other third party's
+    modifications of Covered Software, or (ii) the combination of its
+    Contributions with other software (except as part of its Contributor
+    Version); or
+
+(c) under Patent Claims infringed by Covered Software in the absence of
+    its Contributions.
+
+This License does not grant any rights in the trademarks, service marks,
+or logos of any Contributor (except as may be necessary to comply with
+the notice requirements in Section 3.4).
+
+2.4. Subsequent Licenses
+
+No Contributor makes additional grants as a result of Your choice to
+distribute the Covered Software under a subsequent version of this
+License (see Section 10.2) or under the terms of a Secondary License (if
+permitted under the terms of Section 3.3).
+
+2.5. Representation
+
+Each Contributor represents that the Contributor believes its
+Contributions are its original creation(s) or it has sufficient rights
+to grant the rights to its Contributions conveyed by this License.
+
+2.6. Fair Use
+
+This License is not intended to limit any rights You have under
+applicable copyright doctrines of fair use, fair dealing, or other
+equivalents.
+
+2.7. Conditions
+
+Sections 3.1, 3.2, 3.3, and 3.4 are conditions of the licenses granted
+in Section 2.1.
+
+3. Responsibilities
+-------------------
+
+3.1. Distribution of Source Form
+
+All distribution of Covered Software in Source Code Form, including any
+Modifications that You create or to which You contribute, must be under
+the terms of this License. You must inform recipients that the Source
+Code Form of the Covered Software is governed by the terms of this
+License, and how they can obtain a copy of this License. You may not
+attempt to alter or restrict the recipients' rights in the Source Code
+Form.
+
+3.2. Distribution of Executable Form
+
+If You distribute Covered Software in Executable Form then:
+
+(a) such Covered Software must also be made available in Source Code
+    Form, as described in Section 3.1, and You must inform recipients of
+    the Executable Form how they can obtain a copy of such Source Code
+    Form by reasonable means in a timely manner, at a charge no more
+    than the cost of distribution to the recipient; and
+
+(b) You may distribute such Executable Form under the terms of this
+    License, or sublicense it under different terms, provided that the
+    license for the Executable Form does not attempt to limit or alter
+    the recipients' rights in the Source Code Form under this License.
+
+3.3. Distribution of a Larger Work
+
+You may create and distribute a Larger Work under terms of Your choice,
+provided that You also comply with the requirements of this License for
+the Covered Software. If the Larger Work is a combination of Covered
+Software with a work governed by one or more Secondary Licenses, and the
+Covered Software is not Incompatible With Secondary Licenses, this
+License permits You to additionally distribute such Covered Software
+under the terms of such Secondary License(s), so that the recipient of
+the Larger Work may, at their option, further distribute the Covered
+Software under the terms of either this License or such Secondary
+License(s).
+
+3.4. Notices
+
+You may not remove or alter the substance of any license notices
+(including copyright notices, patent notices, disclaimers of warranty,
+or limitations of liability) contained within the Source Code Form of
+the Covered Software, except that You may alter any license notices to
+the extent required to remedy known factual inaccuracies.
+
+3.5. Application of Additional Terms
+
+You may choose to offer, and to charge a fee for, warranty, support,
+indemnity or liability obligations to one or more recipients of Covered
+Software. However, You may do so only on Your own behalf, and not on
+behalf of any Contributor. You must make it absolutely clear that any
+such warranty, support, indemnity, or liability obligation is offered by
+You alone, and You hereby agree to indemnify every Contributor for any
+liability incurred by such Contributor as a result of warranty, support,
+indemnity or liability terms You offer. You may include additional
+disclaimers of warranty and limitations of liability specific to any
+jurisdiction.
+
+4. Inability to Comply Due to Statute or Regulation
+---------------------------------------------------
+
+If it is impossible for You to comply with any of the terms of this
+License with respect to some or all of the Covered Software due to
+statute, judicial order, or regulation then You must: (a) comply with
+the terms of this License to the maximum extent possible; and (b)
+describe the limitations and the code they affect. Such description must
+be placed in a text file included with all distributions of the Covered
+Software under this License. Except to the extent prohibited by statute
+or regulation, such description must be sufficiently detailed for a
+recipient of ordinary skill to be able to understand it.
+
+5. Termination
+--------------
+
+5.1. The rights granted under this License will terminate automatically
+if You fail to comply with any of its terms. However, if You become
+compliant, then the rights granted under this License from a particular
+Contributor are reinstated (a) provisionally, unless and until such
+Contributor explicitly and finally terminates Your grants, and (b) on an
+ongoing basis, if such Contributor fails to notify You of the
+non-compliance by some reasonable means prior to 60 days after You have
+come back into compliance. Moreover, Your grants from a particular
+Contributor are reinstated on an ongoing basis if such Contributor
+notifies You of the non-compliance by some reasonable means, this is the
+first time You have received notice of non-compliance with this License
+from such Contributor, and You become compliant prior to 30 days after
+Your receipt of the notice.
+
+5.2. If You initiate litigation against any entity by asserting a patent
+infringement claim (excluding declaratory judgment actions,
+counter-claims, and cross-claims) alleging that a Contributor Version
+directly or indirectly infringes any patent, then the rights granted to
+You by any and all Contributors for the Covered Software under Section
+2.1 of this License shall terminate.
+
+5.3. In the event of termination under Sections 5.1 or 5.2 above, all
+end user license agreements (excluding distributors and resellers) which
+have been validly granted by You or Your distributors under this License
+prior to termination shall survive termination.
+
+************************************************************************
+*                                                                      *
+*  6. Disclaimer of Warranty                                           *
+*  -------------------------                                           *
+*                                                                      *
+*  Covered Software is provided under this License on an "as is"       *
+*  basis, without warranty of any kind, either expressed, implied, or  *
+*  statutory, including, without limitation, warranties that the       *
+*  Covered Software is free of defects, merchantable, fit for a        *
+*  particular purpose or non-infringing. The entire risk as to the     *
+*  quality and performance of the Covered Software is with You.        *
+*  Should any Covered Software prove defective in any respect, You     *
+*  (not any Contributor) assume the cost of any necessary servicing,   *
+*  repair, or correction. This disclaimer of warranty constitutes an   *
+*  essential part of this License. No use of any Covered Software is   *
+*  authorized under this License except under this disclaimer.         *
+*                                                                      *
+************************************************************************
+
+************************************************************************
+*                                                                      *
+*  7. Limitation of Liability                                          *
+*  --------------------------                                          *
+*                                                                      *
+*  Under no circumstances and under no legal theory, whether tort      *
+*  (including negligence), contract, or otherwise, shall any           *
+*  Contributor, or anyone who distributes Covered Software as          *
+*  permitted above, be liable to You for any direct, indirect,         *
+*  special, incidental, or consequential damages of any character      *
+*  including, without limitation, damages for lost profits, loss of    *
+*  goodwill, work stoppage, computer failure or malfunction, or any    *
+*  and all other commercial damages or losses, even if such party      *
+*  shall have been informed of the possibility of such damages. This   *
+*  limitation of liability shall not apply to liability for death or   *
+*  personal injury resulting from such party's negligence to the       *
+*  extent applicable law prohibits such limitation. Some               *
+*  jurisdictions do not allow the exclusion or limitation of           *
+*  incidental or consequential damages, so this exclusion and          *
+*  limitation may not apply to You.                                    *
+*                                                                      *
+************************************************************************
+
+8. Litigation
+-------------
+
+Any litigation relating to this License may be brought only in the
+courts of a jurisdiction where the defendant maintains its principal
+place of business and such litigation shall be governed by laws of that
+jurisdiction, without reference to its conflict-of-law provisions.
+Nothing in this Section shall prevent a party's ability to bring
+cross-claims or counter-claims.
+
+9. Miscellaneous
+----------------
+
+This License represents the complete agreement concerning the subject
+matter hereof. If any provision of this License is held to be
+unenforceable, such provision shall be reformed only to the extent
+necessary to make it enforceable. Any law or regulation which provides
+that the language of a contract shall be construed against the drafter
+shall not be used to construe this License against a Contributor.
+
+10. Versions of the License
+---------------------------
+
+10.1. New Versions
+
+Mozilla Foundation is the license steward. Except as provided in Section
+10.3, no one other than the license steward has the right to modify or
+publish new versions of this License. Each version will be given a
+distinguishing version number.
+
+10.2. Effect of New Versions
+
+You may distribute the Covered Software under the terms of the version
+of the License under which You originally received the Covered Software,
+or under the terms of any subsequent version published by the license
+steward.
+
+10.3. Modified Versions
+
+If you create software not governed by this License, and you want to
+create a new license for such software, you may create and use a
+modified version of this License if you rename the license and remove
+any references to the name of the license steward (except to note that
+such modified license differs from this License).
+
+10.4. Distributing Source Code Form that is Incompatible With Secondary
+Licenses
+
+If You choose to distribute Source Code Form that is Incompatible With
+Secondary Licenses under the terms of this version of the License, the
+notice described in Exhibit B of this License must be attached.
+
+Exhibit A - Source Code Form License Notice
+-------------------------------------------
+
+  This Source Code Form is subject to the terms of the Mozilla Public
+  License, v. 2.0. If a copy of the MPL was not distributed with this
+  file, You can obtain one at http://mozilla.org/MPL/2.0/.
+
+If it is not possible or desirable to put the notice in a particular
+file, then You may include the notice in a location (such as a LICENSE
+file in a relevant directory) where a recipient would be likely to look
+for such a notice.
+
+You may add additional accurate notices of copyright ownership.
+
+Exhibit B - "Incompatible With Secondary Licenses" Notice
+---------------------------------------------------------
+
+  This Source Code Form is "Incompatible With Secondary Licenses", as
+  defined by the Mozilla Public License, v. 2.0.
diff --git a/README.md b/README.md
new file mode 100644
index 0000000..2c4364b
--- /dev/null
+++ b/README.md
@@ -0,0 +1,8 @@
+An httpd designed to expose the [CGit](https://git.zx2c4.com/cgit/about/) and the [git-http-backend](https://git-scm.com/docs/git-http-backend) CGI programs to HTTP reverse proxies that do not have native support for executing CGI programs.
+
+
+# Features
+
+-   Supports both the smart and dumb Git HTTP protocols by mounting `git-http-backend` over CGit.
+-   Git repositories can be hosted on separate machine from main HTTP server.
+
diff --git a/README.org b/README.org
new file mode 100644
index 0000000..d831bb6
--- /dev/null
+++ b/README.org
@@ -0,0 +1,9 @@
+#+title: cgit-httpd
+#+OPTIONS: toc:nil
+
+An httpd designed to expose the [[https://git.zx2c4.com/cgit/about/][CGit]] and the [[https://git-scm.com/docs/git-http-backend][git-http-backend]] CGI programs to HTTP reverse proxies that do not have native support for executing CGI programs.
+
+* Features
+
+- Supports both the smart and dumb Git HTTP protocols by mounting =git-http-backend= over CGit.
+- Git repositories can be hosted on separate machine from main HTTP server.
diff --git a/config.go b/config.go
new file mode 100644
index 0000000..b64b574
--- /dev/null
+++ b/config.go
@@ -0,0 +1,44 @@
+// Copyright 2022 Terin Stock.
+// SPDX-License-Identifier: MPL-2.0
+
+package main
+
+import (
+	"os"
+
+	"olympos.io/encoding/edn"
+)
+
+type Config struct {
+	HTTP      HTTPConfig `edn:"http"`
+	CGit      CGitConfig `edn:"cgit"`
+	Git       GitConfig  `edn:"git"`
+	ReposRoot string     `edn:"repos-root"`
+}
+
+type HTTPConfig struct {
+	Host string `end:"host"`
+	Port int    `end:"port"`
+}
+
+type CGitConfig struct {
+	CGI        string `edn:"cgi"`
+	ConfigFile string `edn:"config-file"`
+	AssetsDir  string `edn:"assets-dir"`
+}
+
+type GitConfig struct {
+	CGI       string `edn:"cgi"`
+	ExportAll bool   `edn:"export-all"`
+}
+
+func readConfig(path string) (Config, error) {
+	cfg := Config{}
+	content, err := os.ReadFile(path)
+	if err != nil {
+		return cfg, err
+	}
+
+	err = edn.Unmarshal(content, &cfg)
+	return cfg, err
+}
diff --git a/contrib/config.example.edn b/contrib/config.example.edn
new file mode 100644
index 0000000..b66317f
--- /dev/null
+++ b/contrib/config.example.edn
@@ -0,0 +1,11 @@
+; Example configuration for cgit-httpd for Debian.
+{:http {:port 8080}
+ :repos-root "/srv/git"
+ :cgit {:cgi "/usr/lib/cgit/cgit.cgi"
+        :config-file "/etc/cgitrc" ; See cgitrc(5).
+        :assets-dir "/usr/share/cgit/"}
+ :git {:cgi "/usr/lib/git-core/git-http-backend"
+       ; If false, git-http-backend expects the magic file
+       ; "git-daemon-export-ok" to exist in exportable repos.
+       ; See git-http-backend(1).
+       :export-all false}}
diff --git a/go.mod b/go.mod
new file mode 100644
index 0000000..e7b8dde
--- /dev/null
+++ b/go.mod
@@ -0,0 +1,17 @@
+module go.terinstock.com/cgit-httpd
+
+go 1.18
+
+require (
+	github.com/gorilla/mux v1.8.0
+	github.com/rs/zerolog v1.28.0
+	golang.org/x/sync v0.1.0
+	olympos.io/encoding/edn v0.0.0-20201019073823-d3554ca0b0a3
+	sigs.k8s.io/controller-runtime v0.13.1
+)
+
+require (
+	github.com/mattn/go-colorable v0.1.12 // indirect
+	github.com/mattn/go-isatty v0.0.14 // indirect
+	golang.org/x/sys v0.0.0-20220722155257-8c9f86f7a55f // indirect
+)
diff --git a/go.sum b/go.sum
new file mode 100644
index 0000000..e49fcee
--- /dev/null
+++ b/go.sum
@@ -0,0 +1,31 @@
+github.com/coreos/go-systemd/v22 v22.3.3-0.20220203105225-a9a7ef127534/go.mod h1:Y58oyj3AT4RCenI/lSvhwexgC+NSVTIJ3seZv2GcEnc=
+github.com/fsnotify/fsnotify v1.5.4 h1:jRbGcIw6P2Meqdwuo0H1p6JVLbL5DHKAKlYndzMwVZI=
+github.com/godbus/dbus/v5 v5.0.4/go.mod h1:xhWf0FNVPg57R7Z0UbKHbJfkEywrmjJnf7w5xrFpKfA=
+github.com/gorilla/mux v1.8.0 h1:i40aqfkR1h2SlN9hojwV5ZA91wcXFOvkdNIeFDP5koI=
+github.com/gorilla/mux v1.8.0/go.mod h1:DVbg23sWSpFRCP0SfiEN6jmj59UnW/n46BH5rLB71So=
+github.com/mattn/go-colorable v0.1.12 h1:jF+Du6AlPIjs2BiUiQlKOX0rt3SujHxPnksPKZbaA40=
+github.com/mattn/go-colorable v0.1.12/go.mod h1:u5H1YNBxpqRaxsYJYSkiCWKzEfiAb1Gb520KVy5xxl4=
+github.com/mattn/go-isatty v0.0.14 h1:yVuAays6BHfxijgZPzw+3Zlu5yQgKGP2/hcQbHb7S9Y=
+github.com/mattn/go-isatty v0.0.14/go.mod h1:7GGIvUiUoEMVVmxf/4nioHXj79iQHKdU27kJ6hsGG94=
+github.com/nxadm/tail v1.4.8 h1:nPr65rt6Y5JFSKQO7qToXr7pePgD6Gwiw05lkbyAQTE=
+github.com/onsi/ginkgo v1.16.5 h1:8xi0RTUf59SOSfEtZMvwTvXYMzG4gV23XVHOZiXNtnE=
+github.com/onsi/gomega v1.19.0 h1:4ieX6qQjPP/BfC3mpsAtIGGlxTWPeA3Inl/7DtXw1tw=
+github.com/pkg/errors v0.9.1/go.mod h1:bwawxfHBFNV+L2hUp1rHADufV3IMtnDRdf1r5NINEl0=
+github.com/rs/xid v1.4.0/go.mod h1:trrq9SKmegXys3aeAKXMUTdJsYXVwGY3RLcfgqegfbg=
+github.com/rs/zerolog v1.28.0 h1:MirSo27VyNi7RJYP3078AA1+Cyzd2GB66qy3aUHvsWY=
+github.com/rs/zerolog v1.28.0/go.mod h1:NILgTygv/Uej1ra5XxGf82ZFSLk58MFGAUS2o6usyD0=
+golang.org/x/net v0.0.0-20220722155237-a158d28d115b h1:PxfKdU9lEEDYjdIzOtC4qFWgkU2rGHdKlKowJSMN9h0=
+golang.org/x/sync v0.1.0 h1:wsuoTGHzEhffawBOhz5CYhcrV4IdKZbEyZjBMuTp12o=
+golang.org/x/sync v0.1.0/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
+golang.org/x/sys v0.0.0-20210630005230-0f9fa26af87c/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
+golang.org/x/sys v0.0.0-20210927094055-39ccf1dd6fa6/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
+golang.org/x/sys v0.0.0-20220722155257-8c9f86f7a55f h1:v4INt8xihDGvnrfjMDVXGxw9wrfxYyCjk0KbXjhR55s=
+golang.org/x/sys v0.0.0-20220722155257-8c9f86f7a55f/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
+golang.org/x/text v0.3.7 h1:olpwvP2KacW1ZWvsR7uQhoyTYvKAupfQrRGBFM352Gk=
+gopkg.in/tomb.v1 v1.0.0-20141024135613-dd632973f1e7 h1:uRGJdciOHaEIrze2W8Q3AKkepLTh2hOroT7a+7czfdQ=
+gopkg.in/yaml.v2 v2.4.0 h1:D8xgwECY7CYvx+Y2n4sBz93Jn9JRvxdiyyo8CTfuKaY=
+k8s.io/apimachinery v0.25.0 h1:MlP0r6+3XbkUG2itd6vp3oxbtdQLQI94fD5gCS+gnoU=
+olympos.io/encoding/edn v0.0.0-20201019073823-d3554ca0b0a3 h1:slmdOY3vp8a7KQbHkL+FLbvbkgMqmXojpFUO/jENuqQ=
+olympos.io/encoding/edn v0.0.0-20201019073823-d3554ca0b0a3/go.mod h1:oVgVk4OWVDi43qWBEyGhXgYxt7+ED4iYNpTngSLX2Iw=
+sigs.k8s.io/controller-runtime v0.13.1 h1:tUsRCSJVM1QQOOeViGeX3GMT3dQF1eePPw6sEE3xSlg=
+sigs.k8s.io/controller-runtime v0.13.1/go.mod h1:Zbz+el8Yg31jubvAEyglRZGdLAjplZl+PgtYNI6WNTI=
diff --git a/handlers/cgit/cgit.go b/handlers/cgit/cgit.go
new file mode 100644
index 0000000..d971012
--- /dev/null
+++ b/handlers/cgit/cgit.go
@@ -0,0 +1,61 @@
+// Copyright 2022 Terin Stock.
+// SPDX-License-Identifier: MPL-2.0
+
+package cgit
+
+import (
+	"fmt"
+	"log"
+	"net/http"
+	"net/http/cgi"
+	"path/filepath"
+
+	"github.com/rs/zerolog"
+	"go.terinstock.com/cgit-httpd/server"
+)
+
+type Options struct {
+	CGI        string
+	ReposRoot  string
+	AssetsDir  string
+	ConfigFile string
+	Logger     zerolog.Logger
+}
+
+type Builder struct {
+	handler   *cgi.Handler
+	register  Register
+	assetsDir string
+}
+
+type Register interface {
+	Register(path string, handler http.Handler)
+}
+
+func New(options Options) *Builder {
+	return &Builder{
+		handler: &cgi.Handler{
+			Path: options.CGI,
+			Dir:  options.ReposRoot,
+			Env: []string{
+				fmt.Sprintf("CGIT_CONFIG=%s", options.ConfigFile),
+			},
+			Logger: log.New(options.Logger, "", 0),
+			Stderr: options.Logger.Level(zerolog.ErrorLevel),
+		},
+	}
+}
+
+func (b *Builder) WithRegister(r Register) *Builder {
+	b.register = r
+	return b
+}
+
+func (b *Builder) Build() (http.Handler, error) {
+	for _, a := range []string{"cgit.css", "cgit.png", "cgit.ico", "robots.txt"} {
+		b.register.Register("/"+a, server.FileHandler(filepath.Join(b.assetsDir, a)))
+	}
+	b.register.Register("/{_:.*}", b.handler)
+
+	return b.handler, nil
+}
diff --git a/handlers/git/git.go b/handlers/git/git.go
new file mode 100644
index 0000000..30e8d8f
--- /dev/null
+++ b/handlers/git/git.go
@@ -0,0 +1,60 @@
+// Copyright 2022 Terin Stock.
+// SPDX-License-Identifier: MPL-2.0
+
+package git
+
+import (
+	"fmt"
+	"log"
+	"net/http"
+	"net/http/cgi"
+
+	"github.com/rs/zerolog"
+)
+
+type Options struct {
+	CGI       string
+	ReposRoot string
+	ExportAll bool
+	Logger    zerolog.Logger
+}
+
+type Builder struct {
+	handler  *cgi.Handler
+	register Register
+}
+
+type Register interface {
+	Register(path string, handler http.Handler)
+}
+
+func New(options Options) *Builder {
+	e := []string{
+		fmt.Sprintf("GIT_PROJECT_ROOT=%s", options.ReposRoot),
+	}
+
+	if options.ExportAll {
+		e = append(e, "GIT_HTTP_EXPORT_ALL=true")
+	}
+
+	return &Builder{
+		handler: &cgi.Handler{
+			Path:   options.CGI,
+			Dir:    options.ReposRoot,
+			Env:    e,
+			Logger: log.New(options.Logger, "", 0),
+			Stderr: options.Logger.Level(zerolog.ErrorLevel),
+		},
+	}
+}
+
+func (b *Builder) WithRegister(r Register) *Builder {
+	b.register = r
+	return b
+}
+
+func (b *Builder) Build() (http.Handler, error) {
+	b.register.Register("/{g:.*\\.git/(?:HEAD|info/refs|git-(?:upload|receive)-pack)$}", b.handler)
+
+	return b.handler, nil
+}
diff --git a/main.go b/main.go
new file mode 100644
index 0000000..f0c8c51
--- /dev/null
+++ b/main.go
@@ -0,0 +1,63 @@
+// Copyright 2022 Terin Stock.
+// SPDX-License-Identifier: MPL-2.0
+
+package main
+
+import (
+	"flag"
+	"os"
+
+	"github.com/rs/zerolog"
+	"go.terinstock.com/cgit-httpd/handlers/cgit"
+	"go.terinstock.com/cgit-httpd/handlers/git"
+	"go.terinstock.com/cgit-httpd/manager"
+	"go.terinstock.com/cgit-httpd/server"
+	"sigs.k8s.io/controller-runtime/pkg/manager/signals"
+)
+
+var configFile string
+
+func main() {
+	flag.StringVar(&configFile, "config", "./config.edn", "path to cgit-httpd configuration file")
+	flag.Parse()
+
+	logger := zerolog.New(os.Stdout).With().Logger()
+
+	cfg, err := readConfig(configFile)
+	if err != nil {
+		logger.Fatal().Err(err).Send()
+	}
+
+	logger.Info().Interface("config", cfg).Send()
+
+	srv := server.New(server.Options{
+		Host: cfg.HTTP.Host,
+		Port: cfg.HTTP.Port,
+	})
+
+	cgit.New(cgit.Options{
+		CGI:        cfg.CGit.CGI,
+		ReposRoot:  cfg.ReposRoot,
+		AssetsDir:  cfg.CGit.AssetsDir,
+		ConfigFile: cfg.CGit.ConfigFile,
+		Logger:     logger.With().Str("handler", "cgit").Logger(),
+	}).
+		WithRegister(srv).
+		Build()
+
+	git.New(git.Options{
+		CGI:       cfg.Git.CGI,
+		ReposRoot: cfg.ReposRoot,
+		ExportAll: cfg.Git.ExportAll,
+		Logger:    logger.With().Str("handler", "git").Logger(),
+	}).
+		WithRegister(srv).
+		Build()
+
+	m := manager.New()
+	m.Add(srv)
+
+	if err := m.Start(signals.SetupSignalHandler()); err != nil {
+		logger.Info().Err(err).Msg("manager stopped")
+	}
+}
diff --git a/manager/manager.go b/manager/manager.go
new file mode 100644
index 0000000..1a79214
--- /dev/null
+++ b/manager/manager.go
@@ -0,0 +1,57 @@
+// Copyright 2022 Terin Stock.
+// SPDX-License-Identifier: MPL-2.0
+
+package manager
+
+import (
+	"context"
+	"sync/atomic"
+
+	"golang.org/x/sync/errgroup"
+)
+
+type Manager struct {
+	started     uint32
+	runnables   []Runnable
+	internalCtx context.Context
+	group       *errgroup.Group
+}
+
+func New() *Manager {
+	return &Manager{
+		runnables: []Runnable{},
+	}
+}
+
+func (m *Manager) Add(r Runnable) error {
+	if atomic.LoadUint32(&m.started) == 1 {
+		m.group.Go(func() error {
+			return r.Start(m.internalCtx)
+		})
+	} else {
+		m.runnables = append(m.runnables, r)
+	}
+
+	return nil
+}
+
+func (m *Manager) Start(ctx context.Context) error {
+	g, internalCtx := errgroup.WithContext(ctx)
+	m.group = g
+	m.internalCtx = internalCtx
+
+	atomic.SwapUint32(&m.started, 1)
+	for _, r := range m.runnables {
+		r := r
+		g.Go(func() error {
+			return r.Start(internalCtx)
+		})
+	}
+	m.runnables = nil
+
+	return g.Wait()
+}
+
+type Runnable interface {
+	Start(ctx context.Context) error
+}
diff --git a/server/file.go b/server/file.go
new file mode 100644
index 0000000..cdaef22
--- /dev/null
+++ b/server/file.go
@@ -0,0 +1,12 @@
+// Copyright 2022 Terin Stock.
+// SPDX-License-Identifier: MPL-2.0
+
+package server
+
+import "net/http"
+
+func FileHandler(path string) http.Handler {
+	return http.HandlerFunc(func(rw http.ResponseWriter, req *http.Request) {
+		http.ServeFile(rw, req, path)
+	})
+}
diff --git a/server/server.go b/server/server.go
new file mode 100644
index 0000000..424f359
--- /dev/null
+++ b/server/server.go
@@ -0,0 +1,67 @@
+// Copyright 2022 Terin Stock.
+// SPDX-License-Identifier: MPL-2.0
+
+package server
+
+import (
+	"context"
+	"net"
+	"net/http"
+	"strconv"
+	"time"
+
+	"github.com/gorilla/mux"
+)
+
+type Server struct {
+	mux  *mux.Router
+	host string
+	port int
+}
+
+type Options struct {
+	Host string
+	Port int
+}
+
+func New(options Options) *Server {
+	return &Server{
+		mux:  mux.NewRouter(),
+		host: options.Host,
+		port: options.Port,
+	}
+}
+
+func (s *Server) Register(path string, handler http.Handler) {
+	s.mux.Handle(path, handler)
+}
+
+func (s *Server) Start(ctx context.Context) error {
+	ln, err := net.Listen("tcp", net.JoinHostPort(s.host, strconv.Itoa(s.port)))
+	if err != nil {
+		return err
+	}
+
+	srv := &http.Server{
+		Handler:           s.mux,
+		MaxHeaderBytes:    1 << 20,
+		IdleTimeout:       90 * time.Second,
+		ReadHeaderTimeout: 32 * time.Second,
+	}
+
+	shutdownCh := make(chan struct{})
+	go func() {
+		<-ctx.Done()
+		if err := srv.Shutdown(context.Background()); err != nil {
+			_ = err
+		}
+		close(shutdownCh)
+	}()
+
+	if err := srv.Serve(ln); err != nil && err != http.ErrServerClosed {
+		return err
+	}
+
+	<-shutdownCh
+	return nil
+}