examples: add grok-pull post_update_hook example

This requires the latest (to be in 1.2) -init changes for
synchronization and has no dependencies on GNU or bash-isms
so it should run on *BSD systems without GNU tools.

It does attempt to use curl on <$INBOX_URL/_/text/config/raw>,
but curl is fairly standard nowadays, and falls back to using
an invalid address to initialize.

diff --git a/MANIFEST b/MANIFEST
index 20dbdc54ba5db6cc9c1d408d13749c7ec9c02e7b..aeeb3d83c6ebed7b9132f826cf5107eb2833b5fb 100644 (file)
--- a/MANIFEST
+++ b/MANIFEST
@@ -57,6 +57,7 @@ examples/cgi-webrick.rb
 examples/cgit-commit-filter.lua
 examples/cgit-wwwhighlight-filter.lua
 examples/cgit.psgi
+examples/grok-pull.post_update_hook.sh
 examples/highlight.psgi
 examples/logrotate.conf
 examples/newswww.psgi

diff --git a/examples/grok-pull.post_update_hook.sh b/examples/grok-pull.post_update_hook.sh
new file mode 100755 (executable)
index 0000000..66c5cea
--- /dev/null
+++ b/examples/grok-pull.post_update_hook.sh
@@ -0,0 +1,108 @@
+#!/bin/sh
+# post_update_hook for repos.conf as used by grok-pull, takes a full
+# git repo path as it's first and only arg.
+full_git_dir="$1"
+
+# same default as other public-inbox-* tools
+PI_CONFIG=${PI_CONFIG-~/.public-inbox/config}
+
+# FreeBSD expr(1) only supports BRE, so no '+'
+EPOCH2MAIN='\(..*\)/git/[0-9][0-9]*\.git'
+
+# see if it's v2 or v1 based on tree contents, since somebody could
+# theoretically name a v1 inbox with a path that looks like a v2 epoch
+if git --git-dir="$full_git_dir" ls-tree --name-only HEAD | \
+       grep -E '^(m|d)$' >/dev/null
+then
+       inbox_fmt=2
+       inbox_mainrepo=$(expr "$full_git_dir" : "$EPOCH2MAIN")
+       inbox_name=$(basename "$inbox_mainrepo")
+       msgmap="$inbox_mainrepo"/msgmap.sqlite3
+else
+       inbox_fmt=1
+       inbox_mainrepo="$full_git_dir"
+       inbox_name=$(basename "$inbox_mainrepo" .git)
+       msgmap="$inbox_mainrepo"/public-inbox/msgmap.sqlite3
+fi
+
+# run public-inbox-init iff unconfigured
+cfg_mainrepo=$(git config -f "$PI_CONFIG" publicinbox."$inbox_name".mainrepo)
+case $cfg_mainrepo in
+'')
+       remote_git_url=$(git --git-dir="$full_git_dir" config remote.origin.url)
+       case $remote_git_url in
+       '')
+               echo >&2 "remote.origin.url unset in $full_git_dir/config"
+               exit 1
+               ;;
+       esac
+
+       case $inbox_fmt in
+       1)
+               remote_inbox_url="$remote_git_url"
+               ;;
+       2)
+               remote_inbox_url=$(expr "$remote_git_url" : "$EPOCH2MAIN")
+               ;;
+       esac
+
+       config_url="$remote_inbox_url"/_/text/config/raw
+       remote_config="$inbox_mainrepo"/remote.config.$$
+       trap 'rm -f "$remote_config"' EXIT
+       if curl --compressed -sSf -v "$config_url" >"$remote_config"
+       then
+               # n.b. inbox_name on the remote may not match our local
+               # inbox_name, so we match all addresses in the remote config
+               addresses=$(git config -f "$remote_config" -l | \
+                       sed -ne 's/^publicinbox\..\+\.address=//p')
+               case $addresses in
+               '')
+                       echo >&2 'unable to extract address(es) from ' \
+                               "$remote_config"
+                       exit 1
+                       ;;
+               esac
+               newsgroups=$(git config -f "$remote_config" -l | \
+                       sed -ne 's/^publicinbox\..\+\.newsgroup=//p')
+       else
+               newsgroups=
+               addresses="$inbox_name@$$.$(hostname).example.com"
+               echo >&2 "E: curl $config_url failed"
+               echo >&2 "E: using bogus <$addresses> for $inbox_mainrepo"
+       fi
+       local_url="http://127.0.0.1:8080/$inbox_name"
+       public-inbox-init -V$inbox_fmt "$inbox_name" \
+               "$inbox_mainrepo" "$local_url" $addresses
+
+       if test $? -ne 0
+       then
+               echo >&2 "E: public-inbox-init failed on $inbox_mainrepo"
+               exit 1
+       fi
+
+       for ng in $newsgroups
+       do
+               git config -f "$PI_CONFIG" \
+                       "publicinbox.$inbox_name.newsgroup" "$ng"
+               # only one newsgroup per inbox
+               break
+       done
+       echo "I: $inbox_name at $inbox_mainrepo ($addresses) $local_url"
+       ;;
+esac
+
+# only run public-inbox-index if an index exists and has messages,
+# since epochs may be cloned out-of-order by grokmirror and we also
+# don't know what indexlevel a user wants
+if test -f "$msgmap"
+then
+       n=$(echo 'SELECT COUNT(*) FROM msgmap' | sqlite3 -readonly "$msgmap")
+       case $n in
+       0|'')
+               : v2 inboxes may be init-ed with an empty msgmap
+               ;;
+       *)
+               $EATMYDATA public-inbox-index -v "$inbox_mainrepo"
+               ;;
+       esac
+fi