1 files changed, 161 insertions, 0 deletions
diff --git a/lib/generate.source.sh b/lib/generate.source.sh
new file mode 100644
index 0000000..6f042eb
--- /dev/null
+++ b/lib/generate.source.sh
@@ -0,0 +1,161 @@
+# Generate a HTML or Markdown link from given Gemtext link.
+generate::make_link () {
+    local -r what="$1"; shift
+    local -r line="${1/=> }"; shift
+    local link
+    local descr
+
+    while read -r token; do
+        if [ -z "$link" ]; then
+            link="$token"
+        elif [ -z "$descr" ]; then
+            descr="$token"
+        else
+            descr="$descr $token"
+        fi
+    done < <(echo "$line" | tr ' ' '\n')
+
+    if $GREP -E -q "$IMAGE_PATTERN" <<< "$link"; then
+        if [[ "$what" == md ]]; then
+            md::make_img "$link" "$descr"
+        else
+            html::make_img "$link" "$(html::encode "$descr")"
+        fi
+        return
+    fi
+
+    if [[ "$what" == md ]]; then
+        md::make_link "$link" "$descr"
+    else
+        html::make_link "$link" "$(html::encode "$descr")"
+    fi
+}
+
+# Add other docs (e.g. images, videos) from Gemtext to output format.
+generate::fromgmi_add_docs () {
+    local -r src="$1"; shift
+    local -r format="$1"; shift
+    local -r dest=${src/gemtext/$format}
+    local -r dest_dir=$(dirname "$dest")
+
+    if [[ ! -d "$dest_dir" ]]; then
+        mkdir -p "$dest_dir"
+    fi
+    cp "$src" "$dest"
+    git::add "$format" "$dest"
+}
+
+# Remove docs from output format which aren't present in Gemtext anymore.
+generate::fromgmi_cleanup_docs () {
+    local -r src="$1"; shift
+    local -r format="$1"; shift
+    local dest=${src/.$format/.gmi}
+    dest=${dest/$format/gemtext}
+
+    if [[ ! -f "$dest" ]]; then
+        git::rm "$format" "$src"
+    fi
+}
+
+# Convert the Gemtext Atom feed to a HTML Atom feed.
+generate::convert_gmi_atom_to_html_atom () {
+    local -r format="$1"; shift
+    if [[ "$format" != html ]]; then
+        return
+    fi
+
+    log INFO 'Converting Gemtext Atom feed to HTML Atom feed'
+
+    $SED 's|.gmi|.html|g; s|gemini://|https://|g' \
+        < $CONTENT_BASE_DIR/gemtext/gemfeed/atom.xml \
+        > $CONTENT_BASE_DIR/html/gemfeed/atom.xml
+
+    git::add "$format" "$CONTENT_BASE_DIR/html/gemfeed/atom.xml"
+}
+
+# Internal helper function for generate::fromgmi
+generate::_fromgmi () {
+    local -r src="$1"; shift
+    local -r format="$1"; shift
+    local dest=${src/gemtext/$format}
+    dest=${dest/.gmi/.$format}
+    local dest_dir=$(dirname "$dest")
+
+    if [[ ! -d "$dest_dir" ]]; then
+        mkdir -p "$dest_dir"
+    fi
+
+    if [[ "$format" == html ]]; then
+        cat "$HTML_HEADER" > "$dest.tmp"
+        html::fromgmi < "$src" >> "$dest.tmp"
+        cat "$HTML_FOOTER" >> "$dest.tmp"
+
+    elif [[ "$format" == md ]]; then
+        md::fromgmi < "$src" >> "$dest.tmp"
+    fi
+
+    local title=$($SED -n '/^# / { s/# //; p; q; }' "$src" | tr '"' "'")
+    if [[ -z "$title" ]]; then
+        title=$SUBTITLE
+    fi
+    $SED -i "s|%%TITLE%%|$title|g" "$dest.tmp"
+    mv "$dest.tmp" "$dest"
+
+    git::add "$format" "$dest"
+}
+
+# Generate a given output format from a Gemtext file.
+generate::fromgmi () {
+    local -i num_gmi_files=0
+    local -i num_doc_files=0
+
+    log INFO "Generating $* from Gemtext"
+
+    while read -r src; do
+        num_gmi_files=$(( num_gmi_files + 1 ))
+        for format in "$@"; do
+            generate::_fromgmi "$src" "$format"
+        done
+    done < <(find "$CONTENT_BASE_DIR/gemtext" -type f -name \*.gmi)
+
+    log INFO "Converted $num_gmi_files Gemtext files"
+
+    # Add non-.gmi files to html dir.
+    log VERBOSE "Adding other docs to $*"
+
+    while read -r src; do
+        num_doc_files=$(( num_doc_files + 1 ))
+        for format in "$@"; do
+            generate::fromgmi_add_docs "$src" "$format"
+        done
+    done < <(find "$CONTENT_BASE_DIR/gemtext" -type f | $GREP -E -v '(\.git.*|\.gmi|atom.xml|\.tmp)$')
+
+    log INFO "Added $num_doc_files other documents to each of $*"
+
+    # Add atom feed for HTML
+    for format in "$@"; do
+        generate::convert_gmi_atom_to_html_atom "$format"
+    done
+
+    # Remove obsolete files from ./html/.
+    # Note: The _config.yml is the config file for GitHub pages (md format).
+    # Anoter note: The CNAME file is required by GitHub pages as well for custom domains.
+    for format in "$@"; do
+        find "$CONTENT_BASE_DIR/$format" -type f |
+        $GREP -E -v '(\.git.*|_config.yml|CNAME)$'|
+        while read -r src; do
+            generate::fromgmi_cleanup_docs "$src" "$format"
+        done
+    done
+
+    if [[ -z "$GIT_COMMIT_MESSAGE" ]]; then
+        GIT_COMMIT_MESSAGE='Publishing new version'
+    fi
+    git::commit gemtext "$GIT_COMMIT_MESSAGE"
+    git::commit meta "$GIT_COMMIT_MESSAGE"
+
+    for format in "$@"; do
+        git::commit "$format" "$GIT_COMMIT_MESSAGE"
+        log INFO "$format can be found in $CONTENT_BASE_DIR/$format now"
+    done
+}