[parabola-dependents]: accept param in multiple forms

1 files changed, 29 insertions, 25 deletions

diff --git a/parabola-dependents b/parabola-dependents
index 397dc94..fd61a56 100755
--- a/parabola-dependents
+++ b/parabola-dependents
@@ -3,6 +3,9 @@
 readonly ABS_DIR=/packages/abslibre
 
 readonly BE_VERBOSE=$( [[ "${1}" == '-v' ]] && echo 1 || echo 0 ) ; (( $BE_VERBOSE )) && shift ;
+readonly PKGBUILD_SED_RX='s|/PKGBUILD$|| ; s|([^/]*/)?([^/]+)/([^/]+)$|\2 \3|'
+readonly DEP=$( sed -E "${PKGBUILD_SED_RX}" <<<${1} | cut -d ' ' -f 2 )
+
 
 # readonly REPOS=( nonprism nonsystemd{-testing,} libre{-testing,}
 readonly REPOS=( nonprism{-testing,} nonsystemd{-testing,} libre{-testing,}
@@ -19,26 +22,30 @@ license=(GPL)
 source=(PKGBUILD)
 sha256sums=(SKIP)
 package() { echo "created '"'\${pkgname}'"' package" ; }'
-readonly USAGE='USAGE:
-  parabola-dependents [-v] <PACKAGE_NAME>
+readonly USAGE="USAGE:
+  parabola-dependents [-v] <PACKAGE_BASE>
+  parabola-dependents [-v] <PKGBUILD>
 
   List all parabola packages which are dependents of a specified package.
   This includes direct dependents, transitive dependents, and makedepends dependents.
 
   NOTE: The verbose report does not account for makedepends of packages not in abslibre.
 
+  The positional argument: <PACKAGE_BASE> or <PKGBUILD> may be a 'pkgbase' name,
+  or a path to an abslibre 'pkgbase' directory, or a path to a PKGBUILD.
+  Paths may be absolute or relative. They will all resolve to a 'pkgbase' name.
+
+  If 'pkgbase' does not exist in any database, a dummy package will be created,
+  in memory, upon which for pactree to reflect.
+
   By default, only first-order dependents are listed,
   with counts of higher-order dependents.
 
-  If <PACKAGE_NAME> does not exist, a dummy package will be created,
-  in memory, for pactree to reflect upon.
-
-  Note: this script can take several minutes to complete,
-        if the dependency-tree for <PACKAGE_NAME> is large.
+  Note: this script can take several minutes to complete, if the dependency-tree is large.
 
   Options:
     -v
-      Itemize all higher-order dependents, displaying the dependency-chain.'
+      Itemize all higher-order dependents, displaying the dependency-chain."
 readonly INVALID_ARG_MSG="no dependency package specified\n\n${USAGE}"
 readonly UNPRIVILEGED_MSG="this script requires super-user privileges"
 readonly CBLUE='\033[0;36m'
@@ -73,10 +80,9 @@ LogError() # (source_file func_name line_n)
   printf "${CRED}ERROR: in ${func_name}\n${line_n}: %s${CEND}\n" "${err_loc=}" >&2
 }
 
-Init() # (dep_pkgname)
+Init()
 {
-  local dep_pkgname=$1
-  local dummy_pkg=${dep_pkgname}-0.0.0-42-$(uname -m).pkg.tar.xz
+  local dummy_pkg=${DEP}-0.0.0-42-$(uname -m).pkg.tar.xz
 
   readonly DB_DIR="$(su $(logname) -c 'mktemp -d -t parabola-dependents-XXXXXXXXXX')"
   readonly CFG_FILE=${DB_DIR}/pacman-all.conf
@@ -91,17 +97,17 @@ Init() # (dep_pkgname)
   pacman ${OPTS} -Sy &> /dev/null || true
 
   # create dummy for missing dependency package
-  if   ! pacman ${OPTS} -Ss ^${dep_pkgname}$ &> /dev/null
-  then Log "package '${dep_pkgname}' not found - creating dummy"
+  if   ! pacman ${OPTS} -Ss ^${DEP}$ &> /dev/null
+  then Log "package '${DEP}' not found - creating dummy"
        cd ${DB_DIR}
-       printf "${DUMMY_PKGBUILD}\n" ${dep_pkgname} > ./PKGBUILD
+       printf "${DUMMY_PKGBUILD}\n" ${DEP} > ./PKGBUILD
        su $(logname) -c 'makepkg --force &> /dev/null'
 
        [[ -f ./${dummy_pkg} ]]
 
        repo-add --new parabola-dependents.db.tar ./${dummy_pkg} &> /dev/null
 
-       Log "dummy package '${dep_pkgname}' created"
+       Log "dummy package '${DEP}' created"
        printf "[parabola-dependents]\nServer = file://${DB_DIR}\n"  >> ${CFG_FILE}
   fi
   pacman ${OPTS} -Sy &> /dev/null
@@ -112,9 +118,8 @@ IsArchRepo() # (repo)
   local repo=$1 ; [[ "${repo}" =~ ^(community|core|extra|multilib|testing)$ ]]
 }
 
-CollectResults() # (dep_pkgname)
+CollectResults()
 {
-  local dep_pkgname=$1
   local dep_chains dep_chain dep_pkg via_pkg repos repo pkgbase
 
 # TODO: --chain is a custom pactree feature
@@ -123,19 +128,18 @@ export PATH="/code/pacman-contrib/src:${PATH}"
   # query database for dependents
   Log "querying database ...."
   mapfile -t dep_chains < <(pactree ${OPTS} --sync --reverse --unique --chain \
-                                    ${dep_pkgname} | sort                     )
+                                    ${DEP} | sort                             )
 
   # parse PKGBUILDs for makedepends
   Log "searching abslibre ...."
   cd ${ABS_DIR}
   for pkgbuild in $(find . -name PKGBUILD)
-  do  if   git ls-tree master ${pkgbuild} | grep -E '/PKGBUILD$' > /dev/null          &&
-           ( source ${pkgbuild} ; grep ${dep_pkgname} <<<${makedepends[*]} > /dev/null )
-      then repo=$(    dirname $( dirname ${pkgbuild} ))
-           pkgbase=$( dirname ${pkgbuild}             )
+  do  if   git ls-tree master ${pkgbuild} | grep -E '/PKGBUILD$' > /dev/null  &&
+           ( source ${pkgbuild} ; grep ${DEP} <<<${makedepends[*]} > /dev/null )
+      then repo=$(   sed -E "${PKGBUILD_SED_RX}" <<<${pkgbuild} | cut -d ' ' -f 1)
+           pkgbase=$(sed -E "${PKGBUILD_SED_RX}" <<<${pkgbuild} | cut -d ' ' -f 2)
            Makedependents+=( ${repo}/${pkgbase} )
       fi
-
   done
 
   # compile results
@@ -208,6 +212,6 @@ trap 'LogError "${BASH_SOURCE[0]}" "${FUNCNAME[0]}" "${LINENO}"' ERR
 
 
 LANG=C
-Init           $1
-CollectResults $1
+Init
+CollectResults
 PrintReport