Git (gitolite + git-http-backend + gitweb) configuration

By default repos are be readable by gitweb and the web server ('gitweb' and
'www-data' are both in the 'gitolite' group).  Private repo owners will have
'chmod -R og-rwx' manually.

To automatically add new repos to gitweb's 'project.list' file, make it
readable to the special 'gitweb' user.

See /usr/share/doc/gitolite3/README.txt.gz for details.

12 files changed, 346 insertions, 1 deletions

diff --git a/all.yml b/all.yml
index 4f820bd..fd2ea2e 100644
--- a/all.yml
+++ b/all.yml
@@ -9,3 +9,4 @@
 - include: out.yml
 - include: webmail.yml
 - include: lists.yml
+- include: git.yml
diff --git a/common.yml b/common.yml
index a4f49e5..eac74aa 100644
--- a/common.yml
+++ b/common.yml
@@ -34,7 +34,7 @@
     - LDAP-provider
 
 - name: Configure the Web servers
-  hosts: webmail:lists
+  hosts: webmail:lists:git
   gather_facts: False
   tags: nginx,www,web
   roles:
diff --git a/git.yml b/git.yml
new file mode 100644
index 0000000..04ecab9
--- /dev/null
+++ b/git.yml
@@ -0,0 +1,7 @@
+---
+- name: Configure gitweb & gitolite
+  hosts: git
+  tags:
+    - git
+  roles:
+    - git
diff --git a/roles/git/files/etc/gitweb.conf b/roles/git/files/etc/gitweb.conf
new file mode 100644
index 0000000..8c1dd61
--- /dev/null
+++ b/roles/git/files/etc/gitweb.conf
@@ -0,0 +1,40 @@
+$site_name = "Fripost Git";
+
+# path to git projects (<project>.git)
+$projectroot = "/var/lib/gitolite/repositories";
+
+# directory to use for temp files
+$git_temp = "/tmp";
+
+# target of the home link on top of all pages
+#$home_link = $my_uri || "/";
+
+# html text to include at home page
+$home_text = "";
+
+# file with project list; by default, simply scan the projectroot dir.
+$projects_list = "/var/lib/gitolite/projects.list";
+
+#$projects_list = $projectroot;
+#$export_ok = "git-daemon-export-ok";
+
+# stylesheet to use
+push @stylesheets, "static/gitweb.css";
+
+# javascript code for gitweb
+$javascript = "static/gitweb.js";
+
+# logo to use
+$logo = "static/git-logo.png";
+
+# the 'favicon'
+$favicon = "static/git-favicon.png";
+
+# git-diff-tree(1) options to use for generated patches
+#@diff_opts = ("-M");
+@diff_opts = ();
+
+# the base url
+@git_base_url_list = ( 'git clone ssh://gitolite@git.fripost.org'
+                     , 'git clone https://git.fripost.org'
+                     )
diff --git a/roles/git/files/etc/nginx/sites-available/git b/roles/git/files/etc/nginx/sites-available/git
new file mode 100644
index 0000000..9510620
--- /dev/null
+++ b/roles/git/files/etc/nginx/sites-available/git
@@ -0,0 +1,78 @@
+server {
+    listen      80;
+    listen [::]:80;
+
+    server_name  git.fripost.org;
+
+    access_log /var/log/nginx/git.access.log;
+    error_log  /var/log/nginx/git.error.log info;
+
+    # Bypass the CGI to return static files stored on disk. Try first repo with
+    # a trailing '.git', then without.
+    location ~* "^/((?U)[^/]+)(?:\.git)?/objects/([0-9a-f]{2}/[0-9a-f]{38}|pack/pack-[0-9a-f]{40}\.(?:pack|idx))$" {
+        root /var/lib/gitolite/repositories;
+        try_files /$1.git/objects/$2 /$1/objects/$2 =404;
+    }
+
+    # Disallow push over HTTP(S)
+    location ~* ^/[^/]+/git-receive-pack$ {
+        return 403;
+    }
+
+    location ~* ^/[^/]+/(:?HEAD|info/refs|objects/info/[^/]+|git-upload-pack)$ {
+        fastcgi_param PATH_INFO $uri;
+        fastcgi_param SCRIPT_FILENAME /usr/lib/git-core/git-http-backend;
+        fastcgi_param GIT_HTTP_EXPORT_ALL 1;
+        fastcgi_param GIT_PROJECT_ROOT /var/lib/gitolite/repositories;
+        include fastcgi/params;
+        fastcgi_pass unix:/var/run/fcgiwrap.socket;
+        gzip off;
+    }
+
+    # Redirect to gitweb otherwise
+    location ~ ^/([^/]+/?)?$ {
+        return 302 $scheme://gitweb.fripost.org/$1;
+    }
+}
+
+
+server {
+    listen      443;
+    listen [::]:443;
+
+    server_name  git.fripost.org;
+
+    include ssl/config;
+    ssl_certificate     /etc/nginx/ssl/git.fripost.org.pem;
+    ssl_certificate_key /etc/nginx/ssl/git.fripost.org.key;
+
+    access_log /var/log/nginx/git.access.log;
+    error_log  /var/log/nginx/git.error.log info;
+
+    # Bypass the CGI to return static files stored on disk. Try first repo with
+    # a trailing '.git', then without.
+    location ~* "^/((?U)[^/]+)(?:\.git)?/objects/([0-9a-f]{2}/[0-9a-f]{38}|pack/pack-[0-9a-f]{40}\.(?:pack|idx))$" {
+        root /var/lib/gitolite/repositories;
+        try_files /$1.git/objects/$2 /$1/objects/$2 =404;
+    }
+
+    # Disallow push over HTTP(S)
+    location ~* ^/[^/]+/git-receive-pack$ {
+        return 403;
+    }
+
+    location ~* ^/[^/]+/(:?HEAD|info/refs|objects/info/[^/]+|git-upload-pack)$ {
+        fastcgi_param PATH_INFO $uri;
+        fastcgi_param SCRIPT_FILENAME /usr/lib/git-core/git-http-backend;
+        fastcgi_param GIT_HTTP_EXPORT_ALL 1;
+        fastcgi_param GIT_PROJECT_ROOT /var/lib/gitolite/repositories;
+        include fastcgi/params;
+        fastcgi_pass unix:/var/run/fcgiwrap.socket;
+        gzip off;
+    }
+
+    # Redirect to gitweb otherwise
+    location ~ ^/([^/]+/?)?$ {
+        return 302 $scheme://gitweb.fripost.org/$1;
+    }
+}
diff --git a/roles/git/files/etc/nginx/sites-available/gitweb b/roles/git/files/etc/nginx/sites-available/gitweb
new file mode 100644
index 0000000..3814145
--- /dev/null
+++ b/roles/git/files/etc/nginx/sites-available/gitweb
@@ -0,0 +1,48 @@
+server {
+    listen      80;
+    listen [::]:80;
+
+    server_name  gitweb.fripost.org;
+
+    access_log /var/log/nginx/gitweb.access.log;
+    error_log  /var/log/nginx/gitweb.error.log info;
+
+    location ^~ /static/ {
+        alias /usr/share/gitweb/static/;
+    }
+
+    try_files $uri @fcgi;
+    location @fcgi {
+        root /var/lib/gitolite/repositories;
+        include fastcgi/params;
+        fastcgi_pass unix:/run/gitweb.socket;
+        gzip off;
+    }
+}
+
+
+server {
+    listen      443;
+    listen [::]:443;
+
+    server_name  gitweb.fripost.org;
+
+    include ssl/config;
+    ssl_certificate     /etc/nginx/ssl/git.fripost.org.pem;
+    ssl_certificate_key /etc/nginx/ssl/git.fripost.org.key;
+
+    access_log /var/log/nginx/gitweb.access.log;
+    error_log  /var/log/nginx/gitweb.error.log info;
+
+    location ^~ /static/ {
+        alias /usr/share/gitweb/static/;
+    }
+
+    try_files $uri @fcgi;
+    location @fcgi {
+        root /var/lib/gitolite/repositories;
+        include fastcgi/params;
+        fastcgi_pass unix:/run/gitweb.socket;
+        gzip off;
+    }
+}
diff --git a/roles/git/files/lib/systemd/system/gitweb.service b/roles/git/files/lib/systemd/system/gitweb.service
new file mode 100644
index 0000000..a0f7a96
--- /dev/null
+++ b/roles/git/files/lib/systemd/system/gitweb.service
@@ -0,0 +1,13 @@
+[Unit]
+Description=Gitweb Service
+After=network.target
+Requires=gitweb.socket
+
+[Service]
+StandardInput=socket
+User=gitweb
+Group=gitweb
+ExecStart=/usr/lib/cgi-bin/gitweb.fcgi
+
+[Install]
+WantedBy=multi-user.target
diff --git a/roles/git/files/lib/systemd/system/gitweb.socket b/roles/git/files/lib/systemd/system/gitweb.socket
new file mode 100644
index 0000000..355b490
--- /dev/null
+++ b/roles/git/files/lib/systemd/system/gitweb.socket
@@ -0,0 +1,11 @@
+[Unit]
+Description=Gitweb Listen Socket
+
+[Socket]
+SocketUser=www-data
+SocketGroup=www-data
+SocketMode=0600
+ListenStream=/run/gitweb.socket
+
+[Install]
+WantedBy=sockets.target
diff --git a/roles/git/handlers/main.yml b/roles/git/handlers/main.yml
new file mode 100644
index 0000000..e32bd2f
--- /dev/null
+++ b/roles/git/handlers/main.yml
@@ -0,0 +1,9 @@
+---
+- name: systemctl daemon-reload
+  command: /bin/systemctl daemon-reload
+
+- name: Restart gitweb
+  service: name=gitweb state=restarted
+
+- name: Restart Nginx
+  service: name=nginx state=restarted
diff --git a/roles/git/tasks/gitolite.yml b/roles/git/tasks/gitolite.yml
new file mode 100644
index 0000000..5cbce23
--- /dev/null
+++ b/roles/git/tasks/gitolite.yml
@@ -0,0 +1,36 @@
+- name: Install gitolite
+  apt: pkg=gitolite3
+
+- name: Create a user 'gitolite'
+  user: name=gitolite system=yes
+        groups=ssh-login
+        home=/var/lib/gitolite
+        shell=/bin/sh
+        password=*
+        state=present
+
+- name: Create directory ~gitolite/.ssh
+  file: path=/var/lib/gitolite/.ssh
+        state=directory
+        owner=gitolite group=gitolite
+        mode=0700
+
+- name: Create /var/lib/gitolite/projects.list
+  file: path=/var/lib/gitolite/projects.list
+        owner=gitolite group=gitolite
+        mode=0644
+
+# See /usr/share/doc/gitolite3/README.txt.gz for gitolite initiation or
+# migration.
+#   sudo -u gitolite gitolite setup -pk /path/to/id_rsa
+
+- name: Configure gitolite
+  lineinfile: dest=/var/lib/gitolite/.gitolite.rc
+              "regexp=^(\\s*{{ item.var }}\\s*=>\\s*)"
+              "line=    {{ item.var }} =>  {{ item.value }},"
+              owner=root group=root
+              mode=0644
+  with_items:
+    # See /usr/share/doc/gitolite3/README.txt.gz
+    - { var: UMASK,           value: "0027"                  }
+    - { var: GIT_CONFIG_KEYS, value: "'gitweb\\..* gc\\..*'" }
diff --git a/roles/git/tasks/gitweb.yml b/roles/git/tasks/gitweb.yml
new file mode 100644
index 0000000..81d8e3e
--- /dev/null
+++ b/roles/git/tasks/gitweb.yml
@@ -0,0 +1,100 @@
+- name: Install gitweb
+  apt: pkg={{ item }}
+  with_items:
+    - gitweb
+    # for git-http-backend
+    - fcgiwrap
+
+- name: Configure gitweb
+  copy: src=etc/gitweb.conf
+        dest=/etc/gitweb.conf
+        owner=root group=root
+        mode=0644
+  notify:
+    - Restart gitweb
+
+# See gitweb(1).  To work in Fast CGI mode gitweb checks its filetype.
+- name: Symlink 'gitweb.cgi' to 'gitweb.fcgi'
+  file: src=gitweb.cgi
+        dest=/usr/lib/cgi-bin/gitweb.fcgi
+        owner=root group=root
+        state=link force=no
+
+- name: Create a user 'gitweb'
+  user: name=gitweb system=yes
+        home=/var/www
+        shell=/usr/sbin/nologin
+        password=!
+        state=present
+
+- name: Add 'gitweb' & 'www-data' to the group 'gitolite'
+  user: name={{ item }} groups=gitolite append=yes
+  with_items:
+    # for the gitweb interface
+    - gitweb
+    # for pulls over HTTP/HTTPS
+    - www-data
+
+- name: Copy gitweb.{service,socket}
+  copy: src=lib/systemd/system/{{ item }}
+        dest=/lib/systemd/system/{{ item }}
+        owner=root group=root
+        mode=0644
+  notify:
+    - systemctl daemon-reload
+  with_items:
+    - gitweb.service
+    - gitweb.socket
+
+- meta: flush_handlers
+
+- name: Enable gitweb
+  service: name=gitweb enabled=yes
+
+- name: Start gitweb
+  service: name=gitweb state=started
+
+
+- name: Generate a private key and a X.509 certificate for Nginx
+  command: genkeypair.sh x509
+                         --pubkey=/etc/nginx/ssl/git.fripost.org.pem
+                         --privkey=/etc/nginx/ssl/git.fripost.org.key
+                         --ou=WWW --cn=git.fripost.org --dns=git.fripost.org --dns=gitweb.fripost.org
+                         -t rsa -b 4096 -h sha512
+  register: r1
+  changed_when: r1.rc == 0
+  failed_when: r1.rc > 1
+  notify:
+    - Restart Nginx
+  tags:
+    - genkey
+
+- name: Copy /etc/nginx/sites-available/{git,gitweb}
+  copy: src=etc/nginx/sites-available/{{ item }}
+        dest=/etc/nginx/sites-available/{{ item }}
+        owner=root group=root
+        mode=0644
+  with_items:
+    - git
+    - gitweb
+  register: r2
+  notify:
+    - Restart Nginx
+
+- name: Create /etc/nginx/sites-enabled/{git,gitweb}
+  file: src=../sites-available/{{ item }}
+        dest=/etc/nginx/sites-enabled/{{ item }}
+        owner=root group=root
+        state=link force=yes
+  with_items:
+    - git
+    - gitweb
+  register: r3
+  notify:
+    - Restart Nginx
+
+- name: Start Nginx
+  service: name=nginx state=started
+  when: not (r1.changed or r2.changed or r3.changed)
+
+- meta: flush_handlers
diff --git a/roles/git/tasks/main.yml b/roles/git/tasks/main.yml
new file mode 100644
index 0000000..b5422b7
--- /dev/null
+++ b/roles/git/tasks/main.yml
@@ -0,0 +1,2 @@
+- include: gitolite.yml tags=gitolite
+- include: gitweb.yml   tags=gitweb