diff --git a/CHANGELOG.md b/CHANGELOG.md
new file mode 100644
index 0000000..146762e
--- /dev/null
+++ b/CHANGELOG.md
@@ -0,0 +1,29 @@
+Changelog
+=========
+
+## Unreleased
+- Nothing for now...
+
+## [1.0~ynh5](https://github.com/YunoHost-Apps/minidlna_ynh/pull/14) - 2019-02-03
+
+#### Added
+- [Add progression bar](https://github.com/YunoHost-Apps/minidlna_ynh/pull/14/commits/be7ea84d8ffd37175b424d040918c458047fecf9)
+* [Changelog & html email](https://github.com/YunoHost-Apps/minidlna_ynh/pull/14/commits/ad18af04b853609f0d5c6089a035671ce2e0d96f)
+
+
+## [1.0~ynh4](https://github.com/YunoHost-Apps/minidlna_ynh/pull/13) - 2019-01-21
+
+#### Changed
+- [Update to last standart](https://github.com/YunoHost-Apps/minidlna_ynh/pull/13/commits/c51297661c89a304f585d973fa5caa24c275036b)
+
+
+## [1.0~ynh3](https://github.com/YunoHost-Apps/minidlna_ynh/pull/12) - 2018-09-30
+
+#### Added
+- [Panel-config + actions fully tested](https://github.com/YunoHost-Apps/minidlna_ynh/pull/12/commits/945664af7e4215c099d7b623d74a57207bdf7dae)
+
+
+## [1.0~ynh3](https://github.com/YunoHost-Apps/minidlna_ynh/pull/01) - 2018-07-16
+
+#### Changed
+- [Upgrade helpers](https://github.com/YunoHost-Apps/minidlna_ynh/pull/11/commits/e344e99aef40915c63f97d6f82fe50c5ff07af0d)
diff --git a/scripts/_common.sh b/scripts/_common.sh
index e74bc0f..f2837b0 100755
--- a/scripts/_common.sh
+++ b/scripts/_common.sh
@@ -730,18 +730,141 @@ ynh_maintenance_mode_OFF () {
#=================================================
-# Download and check integrity of a file from app.src_file
+# Create a changelog for an app after an upgrade from the file CHANGELOG.md.
#
-# The file conf/app.src_file need to contains:
+# usage: ynh_app_changelog [--format=markdown/html/plain] [--output=changelog_file] --changelog=changelog_source]
+# | arg: -f --format= - Format in which the changelog will be printed
+# markdown: Default format.
+# html: Turn urls into html format.
+# plain: Plain text changelog
+# | arg: -o --output= - Output file for the changelog file (Default ./changelog)
+# | arg: -c --changelog= - CHANGELOG.md source (Default ../CHANGELOG.md)
#
-# FILE_URL=Address to download the file
-# FILE_SUM=Control sum
-# # (Optional) Program to check the integrity (sha256sum, md5sum...)
-# # default: sha256
-# FILE_SUM_PRG=sha256
-# # (Optionnal) Name of the local archive (offline setup support)
-# # default: Name of the downloaded file.
-# FILENAME=example.deb
+# The changelog is printed into the file ./changelog and ./changelog_lite
+ynh_app_changelog () {
+ # Declare an array to define the options of this helper.
+ local legacy_args=foc
+ declare -Ar args_array=( [f]=format= [o]=output= [c]=changelog= )
+ local format
+ local output
+ local changelog
+ # Manage arguments with getopts
+ ynh_handle_getopts_args "$@"
+ format=${format:-markdown}
+ output=${output:-changelog}
+ changelog=${changelog:-../CHANGELOG.md}
+
+ local original_changelog="$changelog"
+ local temp_changelog="changelog_temp"
+ local final_changelog="$output"
+
+ if [ ! -n "$original_changelog" ]
+ then
+ echo "No changelog available..." > "$final_changelog"
+ echo "No changelog available..." > "${final_changelog}_lite"
+ return 0
+ fi
+
+ local current_version=$(ynh_read_manifest --manifest="/etc/yunohost/apps/$YNH_APP_INSTANCE_NAME/manifest.json" --manifest_key="version")
+ local update_version=$(ynh_read_manifest --manifest="../manifest.json" --manifest_key="version")
+
+ # Get the line of the version to update to into the changelog
+ local update_version_line=$(grep --max-count=1 --line-number "^## \[$update_version" "$original_changelog" | cut -d':' -f1)
+ # If there's no entry for this version yet into the changelog
+ # Get the first available version
+ if [ -z "$update_version_line" ]
+ then
+ update_version_line=$(grep --max-count=1 --line-number "^##" "$original_changelog" | cut -d':' -f1)
+ fi
+
+ # Get the length of the complete changelog.
+ local changelog_length=$(wc --lines "$original_changelog" | awk '{print $1}')
+ # Cut the file before the version to update to.
+ tail --lines=$(( $changelog_length - $update_version_line + 1 )) "$original_changelog" > "$temp_changelog"
+
+ # Get the length of the troncated changelog.
+ changelog_length=$(wc --lines "$temp_changelog" | awk '{print $1}')
+ # Get the line of the current version into the changelog
+ # Keep only the last line found
+ local current_version_line=$(grep --line-number "^## \[$current_version" "$temp_changelog" | cut -d':' -f1 | tail --lines=1)
+ # If there's no entry for this version into the changelog
+ # Get the last available version
+ if [ -z "$current_version_line" ]
+ then
+ current_version_line=$(grep --line-number "^##" "$original_changelog" | cut -d':' -f1 | tail --lines=1)
+ fi
+ # Cut the file before the current version.
+ # Then grep the previous version into the changelog to get the line number of the previous version
+ local previous_version_line=$(tail --lines=$(( $changelog_length - $current_version_line )) \
+ "$temp_changelog" | grep --max-count=1 --line-number "^## " | cut -d':' -f1)
+ # If there's no previous version into the changelog
+ # Go until the end of the changelog
+ if [ -z "$previous_version_line" ]
+ then
+ previous_version_line=$changelog_length
+ fi
+
+ # Cut the file after the previous version to keep only the changelog between the current version and the version to update to.
+ head --lines=$(( $current_version_line + $previous_version_line - 1 )) "$temp_changelog" | tee "$final_changelog"
+
+ if [ "$format" = "html" ]
+ then
+ # Replace markdown links by html links
+ ynh_replace_string --match_string="\[\(.*\)\](\(.*\)))" --replace_string="\1)" --target_file="$final_changelog"
+ ynh_replace_string --match_string="\[\(.*\)\](\(.*\))" --replace_string="\1" --target_file="$final_changelog"
+ elif [ "$format" = "plain" ]
+ then
+ # Change title format.
+ ynh_replace_string --match_string="^##.*\[\(.*\)\](\(.*\)) - \(.*\)$" --replace_string="## \1 (\3) - \2" --target_file="$final_changelog"
+ # Change modifications lines format.
+ ynh_replace_string --match_string="^\([-*]\).*\[\(.*\)\]\(.*\)" --replace_string="\1 \2 \3" --target_file="$final_changelog"
+ fi
+ # else markdown. As the file is already in markdown, nothing to do.
+
+ # Keep only important changes into the changelog
+ # Remove all minor changes
+ sed '/^-/d' "$final_changelog" > "${final_changelog}_lite"
+ # Remove all blank lines (to keep a clear workspace)
+ sed --in-place '/^$/d' "${final_changelog}_lite"
+ # Add a blank line at the end
+ echo "" >> "${final_changelog}_lite"
+
+ # Clean titles if there's no significative changes
+ local line
+ local previous_line=""
+ while read line <&3
+ do
+ if [ -n "$previous_line" ]
+ then
+ # Remove the line if it's a title or a blank line, and the previous one was a title as well.
+ if ( [ "${line:0:1}" = "#" ] || [ ${#line} -eq 0 ] ) && [ "${previous_line:0:1}" = "#" ]
+ then
+ ynh_replace_special_string --match_string="${previous_line//[/.}" --replace_string="" --target_file="${final_changelog}_lite"
+ fi
+ fi
+ previous_line="$line"
+ done 3< "${final_changelog}_lite"
+
+ # Remove all blank lines again
+ sed --in-place '/^$/d' "${final_changelog}_lite"
+
+ # Restore changelog format with blank lines
+ ynh_replace_string --match_string="^##.*" --replace_string="\n\n&\n" --target_file="${final_changelog}_lite"
+ # Remove the 2 first blank lines
+ sed --in-place '1,2d' "${final_changelog}_lite"
+ # Add a blank line at the end
+ echo "" >> "${final_changelog}_lite"
+
+ # If changelog are empty, add an info
+ if [ $(wc --words "$final_changelog" | awk '{print $1}') -eq 0 ]
+ then
+ echo "No changes from the changelog..." > "$final_changelog"
+ fi
+ if [ $(wc --words "${final_changelog}_lite" | awk '{print $1}') -eq 0 ]
+ then
+ echo "No significative changes from the changelog..." > "${final_changelog}_lite"
+ fi
+}
#
# usage: ynh_download_file --dest_dir="/destination/directory" [--source_id=myfile]
# | arg: -d, --dest_dir= - Directory where to download the file