From 1c79e1af6f4387e92c673438015e25bb7dc6c3ca Mon Sep 17 00:00:00 2001
From: Gleidson Nascimento <slaterx@live.com>
Date: Sat, 13 Jun 2020 19:57:04 +1200
Subject: [PATCH] Adding docker support (#4)
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

* Added docker support
* Documenting docker usage
* Add docker hub option to README

Co-authored-by: Richard Szolár <r@richardszolar.me>
---
 .gitignore               |  3 ++-
 Dockerfile               | 12 ++++++++++++
 README.md                | 18 ++++++++++++++++++
 bot-config.template.json | 11 +++++++++++
 conf/conf.go             |  1 +
 init.sh                  | 25 +++++++++++++++++++++++++
 6 files changed, 69 insertions(+), 1 deletion(-)
 create mode 100644 Dockerfile
 create mode 100644 bot-config.template.json
 create mode 100755 init.sh

diff --git a/.gitignore b/.gitignore
index 3ac079a..a0caebe 100644
--- a/.gitignore
+++ b/.gitignore
@@ -11,4 +11,5 @@
 # Output of the go coverage tool, specifically when used with LiteIDE
 *.out
 
-bot-config.json
\ No newline at end of file
+bot-config.json
+.idea
\ No newline at end of file
diff --git a/Dockerfile b/Dockerfile
new file mode 100644
index 0000000..1be20e2
--- /dev/null
+++ b/Dockerfile
@@ -0,0 +1,12 @@
+FROM golang:1.14-buster
+
+CMD /bin/init.sh /bin/rss-bot
+
+COPY . /code
+
+WORKDIR /code
+
+RUN go get ./...
+
+RUN make gh_linux_amd64
+RUN chmod -R g+rwx /code && cp build/telegram-rss-bot-linux-amd64 /bin/rss-bot && cp init.sh /bin
\ No newline at end of file
diff --git a/README.md b/README.md
index 830ad9b..ea4a3c5 100644
--- a/README.md
+++ b/README.md
@@ -43,6 +43,24 @@ You can put the config file in the current folder on where the binary resides or
 - feed_updates_interval: this represents the interval at which rate the feeds saved in the database should be updated in seconds (60 = 60 seconds and so on)
 - feed_posts_interval: this represents the interval at which rate the feeds should be posted to their respective channels in seconds (60 = 60 seconds and so on)
 
+## Docker support
+You can also run this application as a docker container.
+
+### Docker hub
+
+You can pull the official docker image
+```bash
+docker pull ruthless/telegram-rss-bot
+```
+
+### Build from source
+Execute the following steps:
+```
+git clone https://github.com/0x111/telegram-rss-bot
+docker build -t telegram-rss-bot:latest .
+docker run --name telegram-rss-bot -e TELEGRAM_AUTH_KEY="MY-TOKEN" -d telegram-rss-bot:latest
+```
+
 ## Important
 Advisory: You should respect the rate limiting of the Telegram API (More info about this: https://core.telegram.org/bots/faq#my-bot-is-hitting-limits-how-do-i-avoid-this)
 
diff --git a/bot-config.template.json b/bot-config.template.json
new file mode 100644
index 0000000..f3cde85
--- /dev/null
+++ b/bot-config.template.json
@@ -0,0 +1,11 @@
+{
+  "telegram_auth_key": "TELEGRAM_AUTH_KEY",
+  "migrations": "MIGRATIONS",
+  "telegram_api_debug": TELEGRAM_API_DEBUG,
+  "db_path": "DB_PATH",
+  "log_level": "LOG_LEVEL",
+  "feed_parse_amount": FEED_PARSE_AMOUNT,
+  "feed_post_amount": FEED_POST_AMOUNT,
+  "feed_updates_interval": FEED_UPDATES_INTERVAL,
+  "feed_posts_interval": FEED_POST_INTERVAL
+}
\ No newline at end of file
diff --git a/conf/conf.go b/conf/conf.go
index 92d4856..f57fe58 100644
--- a/conf/conf.go
+++ b/conf/conf.go
@@ -17,6 +17,7 @@ func LoadConfig() {
 	viper.SetConfigName("bot-config")
 	viper.AddConfigPath("$HOME/.telegram-rss-bot")
 	viper.AddConfigPath(".")
+	viper.AddConfigPath("./.telegram-rss-bot")
 	err := viper.ReadInConfig()
 
 	if err != nil {
diff --git a/init.sh b/init.sh
new file mode 100755
index 0000000..0544754
--- /dev/null
+++ b/init.sh
@@ -0,0 +1,25 @@
+#!/bin/bash
+
+set -ue
+
+keys="TELEGRAM_AUTH_KEY MIGRATIONS TELEGRAM_API_DEBUG DB_PATH LOG_LEVEL FEED_PARSE_AMOUNT FEED_POST_AMOUNT FEED_UPDATES_INTERVAL FEED_POST_INTERVAL"
+
+TELEGRAM_AUTH_KEY=${TELEGRAM_AUTH_KEY:=token}
+MIGRATIONS=${MIGRATIONS:=v1}
+TELEGRAM_API_DEBUG=${TELEGRAM_API_DEBUG:=false}
+DB_PATH=${DB_PATH:=./bot.db}
+LOG_LEVEL=${LOG_LEVEL:=info}
+FEED_PARSE_AMOUNT=${FEED_PARSE_AMOUNT:=5}
+FEED_POST_AMOUNT=${FEED_POST_AMOUNT:=2}
+FEED_UPDATES_INTERVAL=${FEED_UPDATES_INTERVAL:=600}
+FEED_POST_INTERVAL=${FEED_POST_INTERVAL:=400}
+
+mkdir -p /code/.telegram-rss-bot
+cp ./bot-config.template.json /code/.telegram-rss-bot/bot-config.json
+
+for key in $keys; do
+  sed -i "s|$key|$(eval echo "\$${key}")|g" /code/.telegram-rss-bot/bot-config.json
+done
+
+echo Executing $*
+$*