From ce28889569c1e0914baca84a6ee893c734e079e7 Mon Sep 17 00:00:00 2001
From: Christian Cleberg <hello@cleberg.net>
Date: Tue, 3 Jun 2025 18:45:02 -0500
Subject: feat: build script now automatically updates index posts

---
 build.sh | 172 ++++++++++++++++++++++++++++++++++++++++++++-------------------
 1 file changed, 122 insertions(+), 50 deletions(-)

(limited to 'build.sh')

diff --git a/build.sh b/build.sh
index 66887b3..506909c 100755
--- a/build.sh
+++ b/build.sh
@@ -1,56 +1,128 @@
-#!/bin/bash
-
-# Ensure the latest post is included on the home page
-printf "Did you update the 'Recent Blog Posts' section? [yn] "
-read answer
-
-# Only continue if latest post is included on the home page
-if [[ "$answer" =~ ^[Yy]$ ]]; then
-    # Check if the environment flag is set to PROD
-    if [[ "$ENV" == "prod" ]]; then
-        echo "Environment: Production"
-
-        # Check if publishing via LAN or remotely
-        printf "Publishing on remote or LAN? [r|l] "
-
-        # Update ubuntu_server variable based on answer
-        read method
-        if [[ "$method" =~ ^[Rr]$ ]]; then
-            ubuntu_server="ubuntu-remote"
-        elif [[ "$method" =~ ^[Ll]$ ]]; then
-            ubuntu_server="ubuntu"
-        else
-            echo "Invalid input. Assuming LAN (ubuntu)"
-            ubuntu_server="ubuntu"
-        fi
-
-        # Remove previous build
-        rm -rf .build/*
-
-        # Minify CSS
-        minify -o theme/static/styles.min.css theme/static/styles.css
-
-        # Run publishing script
-        emacs --script publish.el &>/dev/null
-
-        # Deploy changes
-        rsync -r --delete-before .build/* $ubuntu_server:/var/www/cleberg.net/
-    else
-        echo "Environment: Development"
+#!/usr/bin/env bash
+set -e
+
+# -----------------------------------------------------------------------------
+# Function: generate_recent_posts
+#     After publishing to .build/, finds the 3 newest HTML files under .build/blog
+#     (excluding blog index.html), extracts each post’s date/title/tags by:
+#         - <time datetime="...">
+#         - <h1>…</h1>
+#         - <span class="tag">…</span> lines
+#     Replaces everything between <!-- RECENT-POSTS-START --> and
+#     <!-- RECENT-POSTS-END --> in .build/index.html.
+#     Tested on macOS.
+# -----------------------------------------------------------------------------
+generate_recent_posts() {
+    BUILD_DIR="${SCRIPT_DIR}/.build"
+    INDEXFILE="$BUILD_DIR/index.html"
+    BLOGDIR="$BUILD_DIR/blog"
+    TMPFILE="$(mktemp)"
+    MARKER_START="<!-- RECENT-POSTS-START -->"
+    MARKER_END="<!-- RECENT-POSTS-END -->"
+
+    # 1) Verify generated index.html exists
+    if [[ ! -f "$INDEXFILE" ]]; then
+        echo "Error: Generated index.html not found at $INDEXFILE" >&2
+        exit 1
+    fi
+
+    # 2) Verify .build/blog exists
+    if [[ ! -d "$BLOGDIR" ]]; then
+        echo "Error: Generated blog directory not found at $BLOGDIR" >&2
+        exit 1
+    fi
+
+    # 3) Collect the three newest post HTML files, excluding /index.html
+    POSTS=()
+    for FILEPATH in $(ls -1t "$BLOGDIR"/*.html 2>/dev/null | grep -v "/index.html\$" | head -n 3); do
+        [[ -f "$FILEPATH" ]] && POSTS+=("$FILEPATH")
+    done
+
+    # 4) Build the HTML snippet into TMPFILE
+    {
+        for POST in "${POSTS[@]}"; do
+            BASENAME="$(basename "$POST")"
+            URL="/blog/${BASENAME}"
+
+            # 4a) DATE: extract from first <time datetime="...">
+            POST_DATE_FULL="$(sed -n 's/.*<time datetime="\([^"]*\)".*/\1/p' "$POST" | head -n1)"
+            if [[ -n "$POST_DATE_FULL" ]]; then
+                POST_DATE="${POST_DATE_FULL%% *}"
+            else
+                POST_DATE="$(stat -f "%Sm" -t "%Y-%m-%d" "$POST")"
+            fi
+
+            # 4b) TITLE: extract from first <h1>…</h1>
+            TITLE="$(sed -n 's/.*<h1[^>]*>\(.*\)<\/h1>.*/\1/p' "$POST" | head -n1)"
+            if [[ -z "$TITLE" ]]; then
+                TITLE="${BASENAME%.html}"
+            fi
 
-        # Remove previous build
-        rm -rf .build/*
+            # 4c) TAGS: extract each <span class="tag">…</span> line, re-indent by 6 spaces
+            TAGSPAN="$(grep -o '^[[:space:]]*<span class="tag">[^<]*</span>' "$POST" \
+                | sed 's/^[[:space:]]*/            /' || true)"
 
-        # Minify CSS
-        minify -o theme/static/styles.min.css theme/static/styles.css
+            # 4d) Emit one <div class="post">…</div> block
+            cat <<EOF
+    <div class="post">
+        <time datetime="${POST_DATE}">${POST_DATE}</time>
+        <div class="post-content">
+            <a href="${URL}">${TITLE}</a>
+            <div class="post-tags">
+                $(printf "%s\n" "$TAGSPAN")
+            </div>
+        </div>
+    </div>
+EOF
+        done
+    } > "$TMPFILE"
 
-        # Run publishing script
-        emacs --script publish.el
+    # 5) Replace everything between the markers in .build/index.html (keeping markers)
+    sed -i '' -e "/${MARKER_START}/,/${MARKER_END}/{ 
+        /${MARKER_START}/{p; r $TMPFILE
+            }; 
+        /${MARKER_END}/p; 
+        d
+    }" "$INDEXFILE"
 
-        # Launch development web server
-        cd .build/
-        python3 -m http.server
+    rm "$TMPFILE"
+    echo "→ Injected up to 3 newest posts into $INDEXFILE"
+}
+
+
+# -------------------- Main build.sh logic --------------------
+SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
+
+# Step 1: Clean previous build
+rm -rf "${SCRIPT_DIR}/.build"/*
+
+# Step 2: Minify CSS
+minify -o "${SCRIPT_DIR}/theme/static/styles.min.css" "${SCRIPT_DIR}/theme/static/styles.css"
+
+# Step 3: Run Emacs publish.el (outputs into .build/)
+emacs --script "${SCRIPT_DIR}/publish.el" &>/dev/null
+
+# Step 4: Inject the “Recent Blog Posts” section into the generated index.html
+generate_recent_posts
+
+if [[ "$ENV" == "prod" ]]; then
+    echo "Environment: Production"
+    printf "Publishing on remote or LAN? [r|l] "
+    read -r method
+    if [[ "$method" =~ ^[Rr]$ ]]; then
+        ubuntu_server="ubuntu-remote"
+    elif [[ "$method" =~ ^[Ll]$ ]]; then
+        ubuntu_server="ubuntu"
+    else
+        echo "Invalid input. Assuming LAN (ubuntu)"
+        ubuntu_server="ubuntu"
     fi
+
+    # Step 5: Deploy via rsync
+    rsync -r --delete-before "${SCRIPT_DIR}/.build/" "$ubuntu_server":/var/www/cleberg.net/
 else
-    echo "Please update the 'Recent Blog Posts' section before publishing!"
-fi
+    echo "Environment: Development"
+    # Step 5: Launch local HTTP server from .build/
+    cd "${SCRIPT_DIR}/.build/" || exit
+    python3 -m http.server
+fi
\ No newline at end of file
-- 
cgit v1.2.3-70-g09d2