Stow scripts

scripts/bin/installers/install-lib.sh

@@ -0,0 +1,62 @@
+# Program version number comparison.
+function versionGreater() {
+    if [[ $1 == $2 ]];then
+        return 0
+    fi
+    local IFS=.
+    local i ver1=($1) ver2=($2)
+    # fill empty fields in ver1 with zeros
+    for ((i=${#ver1[@]}; i<${#ver2[@]}; i++)); do
+        ver1[i]=0
+    done
+    for ((i=0; i<${#ver1[@]}; i++)); do
+        if [[ -z ${ver2[i]} ]]; then
+            # fill empty fields in ver2 with zeros
+            ver2[i]=0
+        fi
+        if ((10#${ver1[i]} > 10#${ver2[i]})); then
+            return 1
+        fi
+        if ((10#${ver1[i]} < 10#${ver2[i]})); then
+            return 2
+        fi
+    done
+    return 0
+}
+
+# Check if installed to the most recent version.
+function checkUptoDate() {
+    if versionGreater $2 $3; then
+	echo $1 is up to date. Installed version $2 web version $3
+	exit
+    else
+	echo Updating $1 from $2 to $3...
+    fi
+}
+
+# Returns installed programs with a given name.
+function searchProgramInstalled() {
+    dnf list -q | grep $1 
+}
+
+# Filters string to Semantic Versioning.
+function filterVersion() {
+    grep -Po -m 1 '\d{1,4}\.\d{1,4}\.*\d{0,4}'
+}
+
+# Downloads a file to the given download directory with
+# the given name.
+function downloadPackage() {
+    mkdir -p ~/Downloads/installers/${1}
+    cd ~/Downloads/installers/${1}
+    wget -O ${3} ${2}
+}
+
+# Get package manager
+function packageManager() {
+    if command -v dnf &> /dev/null; then
+	echo dnf
+    elif command -v apt &> /dev/null; then
+	echo apt
+    fi
+}