update for t11, and fixes for find file

[distro-functions] / src / identify-distros

diff --git a/src/identify-distros b/src/identify-distros
index 0d7a8fe1a9a1eff9b93a178efbe4839871c40c41..a3bc4028f26c6559e4d4901cddc5aef2a17da82d 100644 (file)
--- a/src/identify-distros
+++ b/src/identify-distros
@@ -13,26 +13,162 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-distro_name() {
-    if [[ -f /etc/fedora-release ]]; then
-        echo fedora
+distro-name() {
+  local x
+  if [[ -f /etc/fedora-release ]]; then
+    echo fedora
+  elif [[ -e /etc/os-release ]]; then
+    sed -rn 's/^ID=(.*)/\1/p' /etc/os-release
+  elif type -p lsb_release &>/dev/null; then
+    # well, this is more standard, but it's 2 ms vs 200 ms
+    x=$(lsb_release -si); echo ${x,,}
+  else
+    echo "unknown distro"
+    return 1
+  fi
+}
+
+distro-name-compat() {
+  local x=$(distro-name)
+  case $x in
+    trisquel)
+      echo ubuntu
+      ;;
+    *)
+      echo $x
+      ;;
+  esac
+}
+
+distro-name-ver() {
+  echo $(distro-name)$(debian-archive)
+}
+
+distro-num() {
+  # Subshell keeps environment clean.
+  ( . /etc/os-release
+    # in ubuntu the .x matters, trisquel it doesnt
+    if [[ $ID == ubuntu ]]; then
+      echo $VERSION_ID
     else
-        grep "^ID=.*" /etc/os-release | sed 's/^ID=//'
+      echo ${VERSION_ID%%.*}
+    fi
+  )
+}
+
+debian-archive() {
+  isdeb || return 0
+  local archive expression pri name highpri shortest
+  local policy="${1:-$(apt-cache policy)}" || return $?
+  # a = archive
+  # n = codename
+  # o = origin
+  # c = component (licensing component)
+  # l = label (Debian{,-Security,-Updates})
+  local d=$(distro-name)
+  # goto b for archive lines we are interested in, a for lines we arent
+  # print priority + archive name. priority is in
+  # the previous line from the archive line.
+  # case insensitive, because $d is lower and we are matching with first char upper
+  read -rd '' expression <<EOF ||:
+/o=$d/I!b a;/l=$d/I!b a;/c=main/!b a b b;
+: a;s/^ *([-0-9]+).*/\1/;h;b;
+: b;s/^.*a=([^,]+).*/ \1/;H;x;s/\n//;p
+EOF
+  while read -r pri name; do
+    # in ubuntu, we get archives like flidas, flidas-updates, all the same pri,
+    # so just pick the shortest one.
+    if [[ ! $highpri ]]; then
+      highpri=$pri;
+      shortest=$name
+      continue
+    fi
+    if [[ $pri != $highpri ]]; then
+      break
+    fi
+    if (( ${#shortest} > ${#name} )); then
+      shortest=$name
     fi
+  done < <(echo "$policy" | sed -rn "$expression" | sort -rn || [[ $? == 141 ]])
+  echo "$shortest"
 }
+
+# formatted for use in pfile() in package-manager-abstractions
+positive-origins() {
+  isdeb || return 0
+  local archive expression pri name highpri shortest
+  local policy="${1:-$(apt-cache policy)}" || return $?
+  # a = archive
+  # n = codename
+  # o = origin
+  # c = component (licensing component)
+  # l = label (Debian{,-Security,-Updates})
+  read -rd '' expression <<EOF ||:
+/^ *([-0-9]+).*/{s/^ *([-0-9]+).*/\1/;h}
+/^.*o=([^,]+).*/{s/^.*o=([^,]+).*/ \1/;H;x;s/\n//;p}
+EOF
+  origins=
+  while read -r pri name; do
+    if (( pri > 0 )); then
+      if [[ ! $origins ]]; then
+        origins=$name
+      else
+        origins+=,$name
+      fi
+    fi
+  done < <(echo "$policy" | sed -rn "$expression" | sort -rn || [[ $? == 141 ]])
+  echo $origins
+}
+
+isdebian-testing() {
+  [[ $(debian-archive) == testing ]]
+}
+# I only do testing or stable.
+isdebian-stable() {
+  [[ $(debian-archive) == stable ]]
+}
+
+debian-codename() {
+  isdeb || return 0
+  local policy="$(apt-cache policy)" || return $?
+  archive=$(debian-archive "$policy")
+  echo "$policy" | sed -rn "s/^.*a=$archive,n=([a-z]+).*/\1/p;T;q" || [[ $? == 141 ]]
+}
+debian-codename-compat() {
+  local n=$(debian-codename)
+  case $n in
+    flidas)
+      echo xenial
+      ;;
+    etiona)
+      echo bionic
+      ;;
+    nabia)
+      echo focal
+      ;;
+    aramo)
+      echo jammy
+      ;;
+    *)
+      echo $n
+      ;;
+  esac
+}
+
 isfedora() {
-    local d=$(distro_name)
-    [[ $d == fedora ]] || return 1
+  [[ $(distro-name) == fedora ]]
 }
 isdebian() {
-    local d=$(distro_name)
-    [[ $d == debian ]] || return 1
+  [[ $(distro-name) == debian ]]
 }
-isdeb() {
-    local d=$(distro_name)
-    [[ $d == debian || $d == ubuntu ]] || return 1
+isarch() {
+  [[ $(distro-name) == arch ]]
 }
 isubuntu() {
-    local d=$(distro_name)
-    [[ $d == ubuntu ]] || return 1
+  [[ $(distro-name) == ubuntu ]]
+}
+istrisquel() {
+  [[ $(distro-name) == trisquel ]]
 }
+# is debian/apt based
+isdeb() { command -v apt-get &>/dev/null; }