crontab: ease the customization of path/pythonpath

now only the variable GHLISTER_ROOT at the beginning of the crontab needs to be
properly customized

bin/update-github-list

@@ -1,6 +1,6 @@
 #!/bin/bash
 
-# PYTHONPATH should be set via cron
+# PYTHONPATH and PATH (for ghlister) should be set via cron
 # export PYTHONPATH=$HOME/src/swh-lister-github/
 
 log_dir=$(grep log_dir ~/.config/swh/lister-github.ini | cut -f 3 -d' ')
@@ -8,7 +8,7 @@ test -d "$log_dir" || mkdir -p "$log_dir"
 logfile="${log_dir}/$(date +%Y%m%d).log"
 
 # catchup with recent changes
-$HOME/src/github-list-repos/bin/ghlister catchup &> "$logfile"
+ghlister catchup &> "$logfile"
 
 # XXX: computing the following stats via this script forced to have double
 # configuration for shell-vs-python. Also it's unneeded: we can compute the

etc/crontab

@@ -1,2 +1,4 @@
+GHLISTER_ROOT=$HOME/src/swh-lister-github
+
 # m h  dom mon dow   command
-  0 8  *   *   *     $HOME/bin/update-github-list
+  0 8  *   *   *     PATH=$GHLISTER_ROOT/bin:$PATH PYTHONPATH=$GHLISTER_ROOT update-github-list