124 lines
3.7 KiB
Bash
Executable File
124 lines
3.7 KiB
Bash
Executable File
#!/bin/bash
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#####################################################################
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# Substitutes the given environment variables in the given files.
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# Parameters:
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# $1: Comma-delimited list of file paths
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# $2: Comma-delimited list of environment variables
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# $3: Absolute path to nginx html directory (optional)
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# $4: Should restart nginx (optional)
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#####################################################################
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echo 'Substituting environment variables...'
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num_args=0
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# The first parameter is a comma-delimited list of paths to files which should be substituted
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if [[ -z $1 ]]; then
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echo 'ERROR: No target files given.'
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exit 1
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else
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num_args=1
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fi
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# The second parameter is a comma-delimited list of environment variable names
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if [[ -z $2 ]]; then
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echo 'ERROR: No environment variables given.'
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exit 1
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else
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num_args=2
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fi
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# The third parameter is the absolute path to the nginx html directory
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if [[ -z $3 ]]; then
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echo '' # It's optional. Don't print anything.
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else
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num_args=3
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fi
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# The fourth parameter, if 'true', is whether we should reload nginx
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if [[ -z $4 ]]; then
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echo '' # It's optional. Don't print anything.
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else
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num_args=4
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fi
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# Find & replace BASE_HREF in all files in the nginx html directory
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if [[ "$2" == *"BASE_HREF"* ]] && [[ "$2" == *"DEPLOY_URL"* ]]; then
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# Add trailing slash to $BASE_HREF if needed
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length=${#BASE_HREF}
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last_char=${BASE_HREF:length-1:1}
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[[ $last_char != "/" ]] && BASE_HREF="$BASE_HREF/"; :
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# Add trailing slash to $DEPLOY_URL if needed
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length=${#DEPLOY_URL}
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last_char=${DEPLOY_URL:length-1:1}
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[[ $last_char != "/" ]] && DEPLOY_URL="$DEPLOY_URL/"; :
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# The third parameter is the absolute path to the nginx html directory
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if [[ $num_args -ge 3 ]]; then
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# Replace all instances of __REPLACE_ME_WITH_BASE_HREF__ with $BASE_HREF
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find "$3" \( -type d -name .git -prune \) -o -type f -print0 | \
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xargs -0 sed -i 's@__REPLACE_ME_WITH_BASE_HREF__@'"$BASE_HREF"'@g'
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echo 'Replacing base href...'
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# Wait a few seconds in case find | sed needs more time
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sleep 3
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# Replace all instances of __REPLACE_ME_WITH_DEPLOY_URL__ with $DEPLOY_URL
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find "$3" \( -type d -name .git -prune \) -o -type f -print0 | \
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xargs -0 sed -i 's@__REPLACE_ME_WITH_DEPLOY_URL__@'"$DEPLOY_URL"'@g'
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echo 'Replacing deploy url...'
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# Wait a few seconds in case find | sed needs more time
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sleep 3
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fi
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fi
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# Convert "VAR1,VAR2,VAR3,..." to "\$VAR1 \$VAR2 \$VAR3 ..."
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env_list="\\\$${2//,/ \\\$}" # "\" and "$" are escaped as "\\" and "\$"
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for file_path in ${1//,/ }
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do
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echo "replacing environment variables in $file_path"
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# Replace strings in the given file(s) in env_list
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envsubst "$env_list" < "$file_path" > "$file_path".tmp && mv "$file_path".tmp "$file_path"
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echo '...'
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# Wait a second in case envsubst needs more time
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sleep 1
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# If this is the nginx default.conf file, replace double slashes with single slashes
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if [[ $file_path == *"/default.conf"* ]]; then
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sed -i -e 's@//@/@g' "$file_path"
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fi
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done
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echo 'Finished substituting environment variables.'
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for env_var in ${2//,/ }
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do
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echo "$env_var = ${!env_var}"
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done
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# Reload nginx
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if [ $num_args -ge 4 ] && [ "$4" == "true" ]; then
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# Check to see if nginx command is available
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if hash nginx 2> /dev/null; then
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# Check to see if nginx is already running
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if [ -e /var/run/nginx.pid ]; then
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echo "nginx is currently running. Reloading nginx..."
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exec nginx -s reload
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echo "nginx reloaded."
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else
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echo "nginx is not yet running. Starting nginx..."
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exec nginx -g 'daemon off;'
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echo "nginx started."
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fi
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else
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echo "nginx command not found on this system."
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fi
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fi
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# Execute all other commands with parameters
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num_args=$((num_args + 1))
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exec "${@:num_args}"
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