[jhalfs] 06/06: BLFS Dependencies: Fix pass2 not run

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commit 141d072bf6b54a3eef0e6ad04cfb2b6c1ae6606c
Author: Pierre Labastie <[email protected]>
AuthorDate: Sun Dec 19 17:26:23 2021 +0100

    BLFS Dependencies: Fix pass2 not run
    
    With the way we manage "first" deps, it may happen that no node
    unreference the pass2 node. In that case, we add it to root.
    Add some documentation for what we do for those deps, too.
---
 BLFS/libs/func_dependencies | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/BLFS/libs/func_dependencies b/BLFS/libs/func_dependencies
index 6a45525..6a7f30e 100644
--- a/BLFS/libs/func_dependencies
+++ b/BLFS/libs/func_dependencies
@@ -298,6 +298,13 @@ clean_subgraph() { #
                 the name of the group is chosen so that it is unlikely as
                 a package name (so that it is removed when building the
                 xml book).
+                Also change the "first" qualifier so that a cycle:
+                 A -first-> B ---chain---> A becomes:
+                 B ---chain---> A -before-> B-pass1
+                and we remove all the dependencies which have a chain to
+                A in B-pass1.
+                Since we do not change anything else, it may happen that
+                nothing depends on B. In that case, B is appended to root.
     input       vars: None
                 files: <node>.dep files containing dangling edges and
                        "after" qualifiers
@@ -396,6 +403,9 @@ for node in $(grep -l ' f ' *); do
   } <$node
   for id_of_dep in $lines_to_change; do
     sed "/\ $id_of_dep\$/"'{s/[[:digit:]] f /1 b /;s/$/-pass1/}' -i $node
+    if ! grep -q " $id_of_dep\$" *.dep; then
+      echo 1 b $id_of_dep >>root.dep
+    fi
   done
 done
 } # End clean_subgraph

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