implement header & footer substitution system

README.md

@@ -37,4 +37,7 @@ or
 you can optionally add a text at the end of the HTML page title as the second argument  
 ```./genlog.sh /path/to/your/choosen/folder "Your custom title"```
 
+you can also put your own `header.html` or `footer.html` in the `html/substitutes` folder  
+so they will be used instead of the default ones and you can freely personalize them
+
 this project uses the [HotChocolateLicence](https://codeberg.org/OniriCorpe/HotChocolateLicence)

genlog.sh

@@ -36,9 +36,23 @@ else
 fi
 
 
+# if header or footer file exists in the substitutes folder, use it instead of the default ones
+if [ -f html/substitutes/header.html ]; then
+    header_template="html/substitutes/header.html"
+else
+    header_template="html/header.html"
+fi
+
+if [ -f html/substitutes/footer.html ]; then
+    footer_template="html/substitutes/footer.html"
+else
+    footer_template="html/footer.html"
+fi
+
+
 # get the current date for the footer (UTC and ISO 8601 with hours and minutes)
 date=$(date -u --iso-8601=minutes)
-sed "s/GEN_DATE/${date}/" html/footer.html > "$tempdir/footer.html"
+sed "s/GEN_DATE/${date}/" "$footer_template" > "$tempdir/footer.html"
 
 
 # finding recursively all ".gmi" files on the working path
@@ -52,7 +66,7 @@ do
 
     # in the header.html, replacing the "<\-- TITLE -->" by the previously
     # saved title, and save the modified file in our temporary directory
-    sed "s#<\!-- TITLE -->#${title}#" html/header.html > "$tempdir/header.html"
+    sed "s#<\!-- TITLE -->#${title}#" "$header_template" > "$tempdir/header.html"
 
     # convertig .gmi files in .html
     /usr/local/bin/gmnitohtml < "$gmi_file" > "$tempdir/body.html"

html/substitutes/.gitignore

@@ -0,0 +1,4 @@
+# Ignore everything in this directory
+*
+# Except this file
+!.gitignore