kicad.updateScript: full shellcheck

pkgs/applications/science/electronics/kicad/update.sh

@@ -1,7 +1,9 @@
 #!/usr/bin/env nix-shell
 #!nix-shell -i bash -p coreutils git nix curl
+# shellcheck shell=bash enable=all
 
 set -e
+shopt -s inherit_errexit
 
 # this script will generate versions.nix in the right location
 # this should contain the versions' revs and hashes
@@ -25,10 +27,12 @@ export TMPDIR=/tmp
 # remove items left in /nix/store?
 
 # get the latest tag that isn't an RC or *.99
-latest_tag="$(git ls-remote --tags --sort -version:refname \
-  https://gitlab.com/kicad/code/kicad.git \
-  | grep -o 'refs/tags/[0-9]*\.[0-9]*\.[0-9]*$' \
-  | grep -v "\.99" | grep -v "\.9\.9" | head -n 1 | cut -d '/' -f 3)"
+latest_tags="$(git ls-remote --tags --sort -version:refname https://gitlab.com/kicad/code/kicad.git)"
+# using a scratch variable to ensure command failures get caught (SC2312)
+scratch="$(grep -o 'refs/tags/[0-9]*\.[0-9]*\.[0-9]*$' <<< "${latest_tags}")"
+scratch="$(grep -ve '\.99' -e '\.9\.9' <<< "${scratch}")"
+scratch="$(head -n 1 <<< "${scratch}")"
+latest_tag="$(cut -d '/' -f 3 <<< "${scratch}")"
 
 all_versions=( "${latest_tag}" master )
 
@@ -60,11 +64,15 @@ tmp="${here}/,versions.nix.${RANDOM}"
 
 libs=( symbols templates footprints packages3d )
 
-get_rev="git ls-remote --heads --tags"
+get_rev() {
+  git ls-remote --heads --tags "$@"
+}
 
 gitlab="https://gitlab.com/kicad"
 # append commit hash or tag
-gitlab_pre="https://gitlab.com/api/v4/projects/kicad%2Fcode%2Fkicad/repository/archive.tar.gz?sha="
+src_pre="https://gitlab.com/api/v4/projects/kicad%2Fcode%2Fkicad/repository/archive.tar.gz?sha="
+lib_pre="https://gitlab.com/api/v4/projects/kicad%2Flibraries%2Fkicad-"
+lib_mid="/repository/archive.tar.gz?sha="
 
 count=0
 
@@ -104,16 +112,19 @@ for version in "${all_versions[@]}"; do
         printf "%6ssrc = {\n" ""
 
     echo "Checking src" >&2
-    src_rev="$(${get_rev} "${gitlab}"/code/kicad.git "${version}" | cut -f1)"
+    scratch="$(get_rev "${gitlab}"/code/kicad.git "${version}")"
+    src_rev="$(cut -f1 <<< "${scratch}")"
     has_rev="$(grep -sm 1 "\"${pname}\"" -A 4 "${file}" | grep -sm 1 "${src_rev}" || true)"
     has_hash="$(grep -sm 1 "\"${pname}\"" -A 5 "${file}" | grep -sm 1 "sha256" || true)"
+
     if [[ -n ${has_rev} && -n ${has_hash} && -z ${clean} ]]; then
       echo "Reusing old ${pname}.src.sha256, already latest .rev" >&2
-      grep -sm 1 "\"${pname}\"" -A 5 "${file}" | grep -sm 1 "rev" -A 1
+      scratch=$(grep -sm 1 "\"${pname}\"" -A 5 "${file}")
+      grep -sm 1 "rev" -A 1 <<< "${scratch}"
     else
+          prefetched="$(${prefetch} "${src_pre}${src_rev}")"
           printf "%8srev =\t\t\t\"%s\";\n" "" "${src_rev}"
-          printf "%8ssha256 =\t\t\"%s\";\n" \
-            "" "$(${prefetch} "${gitlab_pre}${src_rev}")"
+          printf "%8ssha256 =\t\t\"%s\";\n" "" "${prefetched}"
           count=$((count+1))
     fi
         printf "%6s};\n" ""
@@ -126,20 +137,23 @@ for version in "${all_versions[@]}"; do
           for lib in "${libs[@]}"; do
             echo "Checking ${lib}" >&2
             url="${gitlab}/libraries/kicad-${lib}.git"
-            lib_rev="$(${get_rev} "${url}" "${version}" | cut -f1 | tail -n1)"
+            scratch="$(get_rev "${url}" "${version}")"
+            scratch="$(cut -f1 <<< "${scratch}")"
+            lib_rev="$(tail -n1 <<< "${scratch}")"
             has_rev="$(grep -sm 1 "\"${pname}\"" -A 19 "${file}" | grep -sm 1 "${lib_rev}" || true)"
             has_hash="$(grep -sm 1 "\"${pname}\"" -A 20 "${file}" | grep -sm 1 "${lib}.sha256" || true)"
             if [[ -n ${has_rev} && -n ${has_hash} && -z ${clean} ]]; then
               echo "Reusing old kicad-${lib}-${today}.src.sha256, already latest .rev" >&2
-              grep -sm 1 "\"${pname}\"" -A 20 "${file}" | grep -sm 1 "${lib}" -A 1
+              scratch="$(grep -sm 1 "\"${pname}\"" -A 20 "${file}")"
+              grep -sm 1 "${lib}" -A 1 <<< "${scratch}"
             else
+              prefetched="$(${prefetch} "${lib_pre}${lib}${lib_mid}${lib_rev}")"
               printf "%8s%s.rev =\t" "" "${lib}"
               case "${lib}" in
                 symbols|templates) printf "\t" ;; *) ;;
               esac
               printf "\"%s\";\n" "${lib_rev}"
-              printf "%8s%s.sha256 =\t\"%s\";\n" "" \
-                "${lib}" "$(${prefetch} "https://gitlab.com/api/v4/projects/kicad%2Flibraries%2Fkicad-${lib}/repository/archive.tar.gz?sha=${lib_rev}")"
+              printf "%8s%s.sha256 =\t\"%s\";\n" "" "${lib}" "${prefetched}"
               count=$((count+1))
             fi
           done