docker: factor out cron stuff into schedule.sh

It can be easily reused that way.

3 files changed, 68 insertions, 46 deletions

diff --git a/docker/Dockerfile b/docker/Dockerfile
index 6bc6847..b9f67db 100644
--- a/docker/Dockerfile
+++ b/docker/Dockerfile
@@ -22,6 +22,7 @@ ENV SSH_AUTH_SOCK "$ssh_sock_path"
 
 COPY ["docker/entrypoint.sh", "/"]
 COPY ["docker/get_output_dir.py", "/"]
+COPY ["docker/schedule.sh", "/"]
 COPY ["cgitize/", "/usr/src/cgitize/"]
 WORKDIR /usr/src
 
diff --git a/docker/entrypoint.sh b/docker/entrypoint.sh
index 4ca1304..59d4814 100755
--- a/docker/entrypoint.sh
+++ b/docker/entrypoint.sh
@@ -6,6 +6,11 @@
 # Distributed under the MIT License.
 
 set -o errexit -o nounset -o pipefail
+shopt -s inherit_errexit lastpipe
+
+script_dir="$( dirname -- "${BASH_SOURCE[0]}" )"
+script_dir="$( cd -- "$script_dir" && pwd )"
+readonly script_dir
 
 readonly base_dir=/usr/src
 readonly cfg_path=/etc/cgitize/cgitize.toml
@@ -13,6 +18,7 @@ readonly cfg_path=/etc/cgitize/cgitize.toml
 secure_repo_dir() {
     local dir
     dir="$( /get_output_dir.py -- "$cfg_path" )"
+
     chmod -- o-rwx "$dir"
 
     # This is required so that nginx can access the directory.
@@ -21,54 +27,9 @@ secure_repo_dir() {
     chown -- :101 "$dir"
 }
 
-schedule_to_cron() {
-    local schedule
-    for schedule; do
-        case "$schedule" in
-            15min)   echo '*/15 * * * *' ;;
-            hourly)  echo '0 * * * *'    ;;
-            daily)   echo '0 0 * * *'    ;;
-            weekly)  echo '0 0 * * 1'    ;;
-            monthly) echo '0 0 1 * *'    ;;
-            *)
-                echo "$schedule"
-                ;;
-        esac
-    done
-}
-
-make_task_script() {
-    echo "#!/bin/bash
-cd -- "$base_dir" &&$( printf -- ' %q' "$@" )"
-}
-
-setup_cron_task() {
-    local schedule
-    schedule="${SCHEDULE:-once}"
-
-    if [ "$schedule" = once ]; then
-        exec "$@"
-    fi
-
-    schedule="$( schedule_to_cron "$schedule" )"
-
-    make_task_script "$@" > /task.sh
-    chmod +x /task.sh
-
-    # Run the task once when the container is started, regardless of schedule.
-    /task.sh
-
-    local crontab
-    crontab="$schedule /task.sh
-# This is the new crontab."
-
-    echo "$crontab" | crontab -
-    exec crond -f
-}
-
 main() {
     secure_repo_dir
-    setup_cron_task "$@"
+    exec "$script_dir/schedule.sh" "$@"
 }
 
 main "$@"
diff --git a/docker/schedule.sh b/docker/schedule.sh
new file mode 100755
index 0000000..0f3fa20
--- /dev/null
+++ b/docker/schedule.sh
@@ -0,0 +1,60 @@
+#!/usr/bin/env bash
+
+# Copyright (c) 2021 Egor Tensin <Egor.Tensin@gmail.com>
+# This file is part of the "cgitize" project.
+# For details, see https://github.com/egor-tensin/cgitize.
+# Distributed under the MIT License.
+
+set -o errexit -o nounset -o pipefail
+shopt -s inherit_errexit lastpipe
+
+schedule_to_cron() {
+    local schedule
+    for schedule; do
+        case "$schedule" in
+            15min)   echo '*/15 * * * *' ;;
+            hourly)  echo '0 * * * *'    ;;
+            daily)   echo '0 0 * * *'    ;;
+            weekly)  echo '0 0 * * 1'    ;;
+            monthly) echo '0 0 1 * *'    ;;
+            *)
+                echo "$schedule"
+                ;;
+        esac
+    done
+}
+
+make_task_script() {
+    echo "#!/bin/bash
+cd -- "$( pwd )" && $( printf -- ' %q' "$@" )"
+}
+
+setup_cron_task() {
+    local schedule
+    schedule="${SCHEDULE:-once}"
+
+    if [ "$schedule" = once ]; then
+        exec "$@"
+    fi
+
+    schedule="$( schedule_to_cron "$schedule" )"
+
+    make_task_script "$@" > /task.sh
+    chmod +x /task.sh
+
+    # Run the task once when the container is started, regardless of schedule.
+    /task.sh
+
+    local crontab
+    crontab="$schedule /task.sh
+# This is the new crontab."
+
+    echo "$crontab" | crontab -
+    exec crond -f
+}
+
+main() {
+    setup_cron_task "$@"
+}
+
+main "$@"