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authortv <tv@krebsco.de>2015-11-09 19:07:26 +0100
committertv <tv@krebsco.de>2015-11-09 19:07:26 +0100
commit193bb70e2ea95a56839fdd79985ed27f4962426d (patch)
tree28dab916ff9a8ed7b701a965812ccbf8747869f4 /krebs
parent1f39b86dad2f8ddeb8008f6dda02a6dea1c369a6 (diff)
{tv => krebs} git lib & git hooks
Diffstat (limited to 'krebs')
-rw-r--r--krebs/4lib/default.nix6
-rw-r--r--krebs/4lib/git.nix42
-rw-r--r--krebs/5pkgs/git-hooks/default.nix168
3 files changed, 214 insertions, 2 deletions
diff --git a/krebs/4lib/default.nix b/krebs/4lib/default.nix
index 3f27ea891..1cabeae27 100644
--- a/krebs/4lib/default.nix
+++ b/krebs/4lib/default.nix
@@ -3,7 +3,7 @@
with builtins;
with lib;
-rec {
+let out = rec {
eq = x: y: x == y;
@@ -17,6 +17,7 @@ rec {
dir.has-default-nix = path: pathExists (path + "/default.nix");
dns = import ./dns.nix { inherit lib; };
+ git = import ./git.nix { lib = lib // out; };
listset = import ./listset.nix { inherit lib; };
shell = import ./shell.nix { inherit lib; };
tree = import ./tree.nix { inherit lib; };
@@ -33,4 +34,5 @@ rec {
mapAttrValues = f: mapAttrs (_: f);
setAttr = name: value: set: set // { ${name} = value; };
-}
+
+}; in out
diff --git a/krebs/4lib/git.nix b/krebs/4lib/git.nix
new file mode 100644
index 000000000..d50ba2018
--- /dev/null
+++ b/krebs/4lib/git.nix
@@ -0,0 +1,42 @@
+{ lib, ... }:
+
+let
+ inherit (lib) addNames escapeShellArg makeSearchPath optionalString;
+
+ commands = addNames {
+ git-receive-pack = {};
+ git-upload-pack = {};
+ };
+
+ receive-modes = addNames {
+ fast-forward = {};
+ non-fast-forward = {};
+ create = {};
+ delete = {};
+ merge = {}; # TODO implement in git.nix
+ };
+
+ permissions = {
+ fetch = {
+ allow-commands = [
+ commands.git-upload-pack
+ ];
+ };
+
+ push = ref: extra-modes: {
+ allow-commands = [
+ commands.git-receive-pack
+ commands.git-upload-pack
+ ];
+ allow-receive-ref = ref;
+ allow-receive-modes = [ receive-modes.fast-forward ] ++ extra-modes;
+ };
+ };
+
+ refs = {
+ master = "refs/heads/master";
+ all-heads = "refs/heads/*";
+ };
+
+in
+commands // receive-modes // permissions // refs
diff --git a/krebs/5pkgs/git-hooks/default.nix b/krebs/5pkgs/git-hooks/default.nix
new file mode 100644
index 000000000..5697c31be
--- /dev/null
+++ b/krebs/5pkgs/git-hooks/default.nix
@@ -0,0 +1,168 @@
+{ lib, pkgs, ... }:
+
+with lib;
+
+let
+ out = {
+ inherit irc-announce;
+ };
+
+ # TODO irc-announce should return a derivation
+ irc-announce = { nick, channel, server, port ? 6667, verbose ? false }: ''
+ #! /bin/sh
+ set -euf
+
+ export PATH=${makeSearchPath "bin" (with pkgs; [
+ coreutils
+ git
+ gnused
+ ])}
+
+ green() { printf '\x0303,99%s\x0F' "$1"; }
+ red() { printf '\x0304,99%s\x0F' "$1"; }
+ orange() { printf '\x0307,99%s\x0F' "$1"; }
+ pink() { printf '\x0313,99%s\x0F' "$1"; }
+ gray() { printf '\x0314,99%s\x0F' "$1"; }
+
+ unset message
+ add_message() {
+ message="''${message+$message
+ }$*"
+ }
+
+ nick=${escapeShellArg nick}
+ channel=${escapeShellArg channel}
+ server=${escapeShellArg server}
+ port=${toString port}
+
+ host=$nick
+ cgit_endpoint=http://cgit.$host
+
+ empty=0000000000000000000000000000000000000000
+
+ while read oldrev newrev ref; do
+
+ if [ $oldrev = $empty ]; then
+ receive_mode=create
+ elif [ $newrev = $empty ]; then
+ receive_mode=delete
+ elif [ "$(git merge-base $oldrev $newrev)" = $oldrev ]; then
+ receive_mode=fast-forward
+ else
+ receive_mode=non-fast-forward
+ fi
+
+ h=$(echo $ref | sed 's:^refs/heads/::')
+
+ # empty_tree=$(git hash-object -t tree /dev/null)
+ empty_tree=4b825dc6
+
+ id=$(echo $newrev | cut -b-7)
+ id2=$(echo $oldrev | cut -b-7)
+ if [ $newrev = $empty ]; then id=$empty_tree; fi
+ if [ $oldrev = $empty ]; then id2=$empty_tree; fi
+
+ case $receive_mode in
+ create)
+ link="$cgit_endpoint/$GIT_SSH_REPO/?h=$h"
+ ;;
+ delete)
+ link="$cgit_endpoint/$GIT_SSH_REPO/ ($h)"
+ ;;
+ fast-forward|non-fast-forward)
+ link="$cgit_endpoint/$GIT_SSH_REPO/diff/?h=$h&id=$id&id2=$id2"
+ ;;
+ esac
+
+ #$host $GIT_SSH_REPO $ref $link
+ add_message $(pink push) $link $(gray "($receive_mode)")
+
+ ${optionalString verbose ''
+ add_message "$(
+ git log \
+ --format="$(orange %h) %s $(gray '(%ar)')" \
+ --reverse \
+ $id2..$id
+
+ git diff --stat $id2..$id \
+ | sed '$!s/\(+*\)\(-*\)$/'$(green '\1')$(red '\2')'/'
+ )"
+ ''}
+
+ done
+
+ if test -n "''${message-}"; then
+ exec ${irc-announce-script} \
+ "$server" \
+ "$port" \
+ "$nick" \
+ "$channel" \
+ "$message"
+ fi
+ '';
+
+ irc-announce-script = pkgs.writeScript "irc-announce-script" ''
+ #! /bin/sh
+ set -euf
+
+ export PATH=${makeSearchPath "bin" (with pkgs; [
+ coreutils
+ gawk
+ gnused
+ netcat
+ nettools
+ ])}
+
+ IRC_SERVER=$1
+ IRC_PORT=$2
+ IRC_NICK=$3$$
+ IRC_CHANNEL=$4
+ message=$5
+
+ export IRC_CHANNEL # for privmsg_cat
+
+ # echo2 and cat2 are used output to both, stdout and stderr
+ # This is used to see what we send to the irc server. (debug output)
+ echo2() { echo "$*"; echo "$*" >&2; }
+ cat2() { tee /dev/stderr; }
+
+ # privmsg_cat transforms stdin to a privmsg
+ privmsg_cat() { awk '{ print "PRIVMSG "ENVIRON["IRC_CHANNEL"]" :"$0 }'; }
+
+ # ircin is used to feed the output of netcat back to the "irc client"
+ # so we can implement expect-like behavior with sed^_^
+ # XXX mkselfdestructingtmpfifo would be nice instead of this cruft
+ tmpdir="$(mktemp -d irc-announce_XXXXXXXX)"
+ cd "$tmpdir"
+ mkfifo ircin
+ trap "
+ rm ircin
+ cd '$OLDPWD'
+ rmdir '$tmpdir'
+ trap - EXIT INT QUIT
+ " EXIT INT QUIT
+
+ {
+ echo2 "USER $LOGNAME 0 * :$LOGNAME@$(hostname)"
+ echo2 "NICK $IRC_NICK"
+
+ # wait for MODE message
+ sed -n '/^:[^ ]* MODE /q'
+
+ echo2 "JOIN $IRC_CHANNEL"
+
+ printf '%s' "$message" \
+ | privmsg_cat \
+ | cat2
+
+ echo2 "PART $IRC_CHANNEL"
+
+ # wait for PART confirmation
+ sed -n '/:'"$IRC_NICK"'![^ ]* PART /q'
+
+ echo2 'QUIT :Gone to have lunch'
+ } < ircin \
+ | nc "$IRC_SERVER" "$IRC_PORT" | tee -a ircin
+ '';
+
+in out