130 lines
4.6 KiB
Bash
Executable File
130 lines
4.6 KiB
Bash
Executable File
#!/bin/sh
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# postinst — twiy package ONLY (twiy-raweb uses postinst-raweb).
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#
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# Config files live under /nginx but are NOT tracked by dpkg. The package
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# ships an empty /nginx skeleton (so dpkg keeps the dirs across upgrades) plus
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# a pristine copy of every config under /usr/share/twiy/defaults/nginx.
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#
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# This script NEVER prompts. The packaged defaults fall into two classes:
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#
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# STOCK — nginx's own plumbing files (fastcgi.conf, fastcgi_params,
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# mime.types, scgi_params, uwsgi_params, koi-utf, koi-win, win-utf).
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# Nobody hand-tunes these, and a missing one breaks every vhost that
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# includes it, so they are placed when absent and refreshed when they
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# differ from the packaged copy — fresh install and upgrade alike.
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#
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# ADMIN — everything else (nginx.conf, live/, conf.d/, config/, modsec/).
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# Fresh install -> placed if absent, no questions: /nginx is empty by
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# design at that point and nginx will not start without them.
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# Upgrade -> NEVER touched. Unmodified, admin-edited or deleted,
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# it is left exactly as found: no replace, no restore, no prompt.
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#
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# TWIY_SEED_DEFAULTS overrides the ADMIN behaviour, for automation:
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# yes -> also place any missing ADMIN default on an upgrade (never overwrites)
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# no -> hands off entirely; not even STOCK files are touched
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#
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# /hostdata is left entirely to the admin: we only make sure the dir exists,
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# and we never touch or remove its contents.
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set -e
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# STOCK defaults, matched on the path RELATIVE to /nginx — so a same-named file
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# under live/ or conf.d/ is admin config, not stock.
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is_stock() {
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case "$1" in
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fastcgi.conf|fastcgi_params|mime.types|scgi_params|uwsgi_params|koi-utf|koi-win|win-utf)
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return 0 ;;
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*) return 1 ;;
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esac
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}
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# Byte-identical? Uses md5sum (coreutils, Essential) rather than cmp, which
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# lives in diffutils and is not guaranteed present for a maintainer script.
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same_content() {
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[ -e "$2" ] || return 1
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[ "$(md5sum < "$1")" = "$(md5sum < "$2")" ]
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}
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# dpkg calls us as `postinst configure <old-version>`; $2 is empty only on a
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# fresh install (or on reinstall after a purge), which is exactly the case where
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# an empty /nginx is expected rather than admin intent.
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if [ "$1" = configure ] && [ -z "${2:-}" ]; then
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fresh_install=yes
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else
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fresh_install=no
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fi
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seed_admin=$fresh_install
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hands_off=no
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case "${TWIY_SEED_DEFAULTS:-}" in
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[Yy]|[Yy][Ee][Ss]) seed_admin=yes ;;
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[Nn]|[Nn][Oo]) seed_admin=no; hands_off=yes ;;
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esac
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useradd -r -s /bin/false nginx 2>/dev/null || true
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# Existing dirs are left exactly as they are (mkdir -p is a no-op then).
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mkdir -p /nginx /hostdata
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# Migration: older releases shipped /nginx/* as dpkg-tracked files, so the
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# upgrade unpack deletes them before this script runs. preinst stashed a copy
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# first — restore the admin's own files now, without clobbering anything
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# already present (cp -n). This only puts back what dpkg removed; it never
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# introduces new packaged defaults.
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if [ -d /var/backups/twiy-nginx ]; then
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cp -an /var/backups/twiy-nginx/. /nginx/ 2>/dev/null || true
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rm -rf /var/backups/twiy-nginx
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fi
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# Place the packaged defaults per the policy documented above.
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seed_tree() {
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stash="$1"
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target="$2"
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[ -d "$stash" ] || return 0
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find "$stash" -type f | while IFS= read -r src; do
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rel=${src#$stash/}
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dst="$target/$rel"
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if is_stock "$rel"; then
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if same_content "$src" "$dst"; then
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continue
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fi
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if [ -e "$dst" ]; then
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what=refreshed
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else
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what=created
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fi
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install -d "$(dirname "$dst")"
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cp -p "$src" "$dst"
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echo "twiy: $what $dst"
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continue
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fi
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# ADMIN config: present is never touched; absent is created only when
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# seeding is allowed (fresh install, or TWIY_SEED_DEFAULTS=yes).
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if [ -e "$dst" ]; then
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continue
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fi
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if [ "$seed_admin" = yes ]; then
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install -d "$(dirname "$dst")"
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cp -p "$src" "$dst"
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echo "twiy: created $dst"
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else
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echo "twiy: $dst is missing, left as-is (admin owns it)"
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fi
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done
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}
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if [ "$hands_off" = no ]; then
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seed_tree /usr/share/twiy/defaults/nginx /nginx
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fi
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install -d /nginx/conf.d /nginx/config
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install -d -o nginx -g nginx -m 0755 /var/log/nginx
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chown -R nginx:nginx /var/log/nginx /nginx 2>/dev/null || true
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systemctl daemon-reload 2>/dev/null || true
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systemctl enable nginx.service 2>/dev/null || true
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systemctl restart nginx.service 2>/dev/null || true
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exit 0
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