fix: broken links in pdf

Author: astansler

README.md

@@ -99,7 +99,7 @@ The following programs must be installed on the observer machine:
 * awk
 * sed
 * pandoc *
-* wkhtmltopdf *
+* wkhtmltopdf >= 0.12.4 *
 
 Pandoc and wkhtmltopdf optional, they need for generating HTML and PDF versions
 of report (see `--pdf` and `--html`).
@@ -121,9 +121,14 @@ sudo apt-get install postgresql
 sudo apt-get install coreutils
 sudo apt-get install jq
 sudo apt-get install golang
-# Optional
+# Optional (if you need PDF/HTML)
+# Pandoc (needed for both HTML and PDF generation)
 sudo apt install pandoc
-sudo apt-get install wkhtmltopdf
+# wkhtmltopdf (needed for PDF generation)
+wget https://github.com/wkhtmltopdf/wkhtmltopdf/releases/download/0.12.4/wkhtmltox-0.12.4_linux-generic-amd64.tar.xz
+tar xvf wkhtmltox-0.12.4_linux-generic-amd64.tar.xz
+sudo mv wkhtmltox/bin/wkhtmlto* /usr/local/bin
+sudo apt-get install -y openssl libssl-dev libxrender-dev libx11-dev libxext-dev libfontconfig1-dev libfreetype6-dev fontconfig
 ```
 
 MacOS (assuming that Homebrew is installed):

checkup

@@ -370,6 +370,16 @@ validate_args() {
       echo "[$(date +'%Y-%m-%dT%H:%M:%S%z')] ERROR: 'wkhtmltopdf' not found. Cannot generate PDF." >&2
       exit 1
     fi
+
+    wkhtmltopdf_ver_resp=$(wkhtmltopdf -V)
+    wkhtmltopdf_ver_resp_lines=${wkhtmltopdf_ver_resp// /\\n}
+    wkhtmltopdf_current_ver=$(echo -e $wkhtmltopdf_ver_resp_lines | awk '/([0-9.]+)/')
+    wkhtmltopdf_required_ver="0.12.4"
+
+    if [ "$(printf '%s\n' "$wkhtmltopdf_required_ver" "$wkhtmltopdf_current_ver" | sort -V | head -n1)" != "$wkhtmltopdf_required_ver" ]; then 
+      echo "[$(date +'%Y-%m-%dT%H:%M:%S%z')] ERROR: 'wkhtmltopdf' version is outdated. Update to $wkhtmltopdf_required_ver or newer. See README. Cannot generate PDF." >&2
+      exit 1
+    fi
   fi
 
   # custom UNIX domain socket directory for PostgreSQL
@@ -782,7 +792,7 @@ glue_md_reports() {
   tableOfContents=""
   content=""
   echo "" >> "${out_fname}"
-  echo "<a name=\"postgres-checkup_top\"></a>" >> "${out_fname}"
+  echo "<a name=\"postgres-checkup_top\">&nbsp;</a>" >> "${out_fname}"
   echo "### Table of contents ###" >> "${out_fname}"
   #generate table of contents and glue reports together
   for cur_report in "${MD_REPORTS_DIR}"/*.md; do
@@ -795,7 +805,7 @@ glue_md_reports() {
     title="${title%"${title##*[![:space:]]}"}"
     checkId=$(echo $title | cut -c 1-4)
     tableOfContents="$tableOfContents\n[$title](#postgres-checkup_$checkId)  "
-    content="$content\n\n\n---\n<a name=\"postgres-checkup_$checkId\"></a>\n[Table of contents](#postgres-checkup_top)"
+    content="$content\n\n\n---\n<a name=\"postgres-checkup_$checkId\">&nbsp;</a>\n[Table of contents](#postgres-checkup_top)"
     report=$(cat "${cur_report}")
     content="$content\n$report"
   done

resources/pdf.style

@@ -259,7 +259,7 @@ body input {
 }
 
 body a {
-  color: black;
+  color: #0366d6;
   text-decoration: none;
 }
 
@@ -1020,4 +1020,4 @@ body .pl-12 {
   font-weight: bold;
   color: #333;
 }
-</style>
+</style>