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|
#! /usr/bin/env bash
# Mirror repositories. For example:
#
# mrrepo -s git.example.org /var/scm
#
# Will first download (via http or https if -s specified) the manifest file
# from git.example.org which should list all publicly available repositories.
# It will then mirror each repository in /var/scm using the git protocol.
#
# -v
# Run verbose.
#
# -s
# Use https rather than http to download the manifest (git protocol is still
# used for mirroring).
#
# Notes:
# - needs curl
# - run from cron as user scm (which belongs to the group scm).
#
usage="usage: $0 [-v] [-s] <host> <path>"
owd="$(pwd)"
trap "{ cd '$owd'; exit 1; }" ERR
set -o errtrace # Trap in functions.
function info () { echo "$*" 1>&2; }
function error () { info "$*"; exit 1; }
prot="http"
host=
path=
verb=0
while [ "$#" -gt 0 ]; do
case "$1" in
-v)
verb=1
shift
;;
-s)
prot="https"
shift
;;
*)
if [ -z "$host" ]; then
host="$1"
elif [ -z "$path" ]; then
path="${1%/}"
else
error "$usage"
fi
shift
;;
esac
done
if [ -z "$host" -o -z "$path" ]; then
error "$usage"
fi
if [ ! -d "$path" ]; then
error "$path is not a directory"
fi
cd "$path"
curl_ops=()
curl_ops+=(-f) # Fail on HTTP errors.
curl_ops+=(--max-time 30) # Finish in 30 seconds.
if [ "$verb" -ge 1 ]; then
curl_ops+=(--progress-bar)
else
curl_ops+=(-s -S) # Silent but show errors.
fi
function fetch () # <url> [<curl-options>]
{
local u="$1"; shift
if [ "$verb" -ge 1 ]; then
info "${curl_ops[@]}" "$@" "$u"
fi
curl "${curl_ops[@]}" "$@" "$u"
}
fetch "$prot://$host/manifest" -z manifest -o manifest
new=()
while read r || [ -n "$r" ]; do
new+=("$r")
done <manifest
# Find all the existing repositories (directories that end with .git).
#
old=($(find . -type d -name '*.git' -print -prune | sed -e 's%^./%%' -))
git_ops=()
if [ "$verb" -eq 0 ]; then
git_ops+=(-q)
fi
for r in "${new[@]}"; do
if [ -d "$r" ]; then
if [ -z "$(ls -A "$r")" ]; then
rm -r "$r"
fi
fi
if [ ! -d "$r" ]; then
if [ "$verb" -ge 1 ]; then
info "new repository $r in manifest, cloning"
info git clone "${git_ops[@]}" --mirror "git://$host/$r" "$r"
fi
mkdir -p "$r"
git clone "${git_ops[@]}" --mirror "git://$host/$r" "$r"
# Also copy the description file.
#
fetch "$prot://$host/$r/description" -o "$r/description"
else
if [ "$verb" -ge 1 ]; then
info "existing repository $r, fetching"
info git -C "$r" fetch "${git_ops[@]}" --prune --tags
fi
git -C "$r" fetch "${git_ops[@]}" --prune --tags
fi
done
# Remove old repositories.
#
for o in "${old[@]}"; do
for n in "${new[@]}"; do
if [ "$o" = "$n" ]; then
o=
break
fi
done
if [ -n "$o" ]; then
if [ "$verb" -ge 1 ]; then
info "repository $o is no longer in manifest, removing"
fi
rm -rf "$o"
fi
done
cd "$owd"
|
