| 1 | #!/bin/bash
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| 2 | #
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| 3 |
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| 4 | #-----------------------------------------------------------------------------#
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| 5 | # This is a set of (recursive) functions for manipulating a dependency graph. #
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| 6 | # We use algorithms and definitions from chapter 4 (mainly section 4.2) of #
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| 7 | # https://algs4.cs.princeton.edu/. The graph we manipulate is the directed #
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| 8 | # graph of the dependencies: nodes are packages in the BLFS book. A node A is #
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| 9 | # connected to a node B if package A depends on B. A topological order (rev- #
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| 10 | # erted) is exactly what we want for a build order. But a topological order #
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| 11 | # only exists if the graph is acyclic. We'll therefore have to remove cycles. #
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| 12 | # There are a number of other features we want to consider: #
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| 13 | # - edges are weighted according to the dependency requirement: #
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| 14 | # 1 for required #
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| 15 | # 2 for recommended #
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| 16 | # 3 for optional #
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| 17 | # 4 for external #
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| 18 | # We should consider only edges with weight lower or equal to that #
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| 19 | # specified by the user, but see below. #
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| 20 | # - we do not want to build the whole book. The user specifies a set of #
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| 21 | # packages, and we have to consider only nodes reachable from this set #
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| 22 | # using edges of weight not exceeding the specified weight. #
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| 23 | # - when doing the topological sort, we want to consider all the edges and #
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| 24 | # not only those not exceeding the specified weight: If a package A in the #
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| 25 | # reachable subgraph depends optionally on another package B in the same #
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| 26 | # subgraph, we want to build B before A. But this means we'll have to #
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| 27 | # remove cycles for all weights. #
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| 28 | # - dependencies have another qualifier: before or after. The problem: if a #
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| 29 | # package A depends on B with an "after" qualifier, and a package C depends #
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| 30 | # on A with a "before" qualifier, C may need B to be able to use A. So the #
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| 31 | # only safe way to consider "after" qualifiers is to consider that they are #
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| 32 | # "before" deps for any parent of the packages considered. There is an #
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| 33 | # exception to that rule: if B depends on C (possibly through a chain of #
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| 34 | # several dependencies), then C should still be built before B. #
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| 35 | # We'll therefore have a 3 pass procedure. First build the set of nodes #
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| 36 | # reachable from the root set. Second, remove dangling edges (those pointing #
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| 37 | # to packages outside the node set), and move "after" edges to "before" edges #
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| 38 | # originating from the parents. Third remove cycles and generate a #
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| 39 | # topological sort. #
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| 40 | # #
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| 41 | # Pass 1: graph generation #
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| 42 | # ======================== #
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| 43 | # Data layout for pass 1 #
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| 44 | # ---------------------- #
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| 45 | # A node of the tree is represented by a text file <nodeName>.dep. Each edge #
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| 46 | # starting from this node is represented by a line in this file. We keep #
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| 47 | # those files in the same directory. We introduce a special node named root, #
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| 48 | # whose edges point to the list of nodes requested by the user. Each line #
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| 49 | # contains three fields: #
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| 50 | # - the weight of the edge #
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| 51 | # - the qualifier: "before" (b), "after" (a), or "first" (f) #
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| 52 | # - the name of the destination of the edge (without the ".dep" extension) #
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| 53 | # #
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| 54 | # Recursive function "generate_subgraph" #
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| 55 | # -------------------------------------- #
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| 56 | # This function treats a node of the graph that is not a leaf and that is #
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| 57 | # seen for the first time in the DFS. The dependencies of this node are #
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| 58 | # known, and stored in a .dep file. For each dependency in that file, there #
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| 59 | # are three cases: #
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| 60 | # - the weight of the edge leading to that dependency is higher than #
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| 61 | # requested. This dependency is discarded (some information printed) #
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| 62 | # - the weight of the edge is lower or equal to requested, but the node #
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| 63 | # has already been visited (the .dep file exists). Discard too (some #
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| 64 | # information printed) #
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| 65 | # - the weight of the edge is lower or equal to requested, and the node #
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| 66 | # has not been seen: then the dependencies of that node are generated, #
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| 67 | # and there are two cases: #
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| 68 | # - the node has no dependencies: just create an empty .dep file, so #
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| 69 | # that we know the node has been visited #
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| 70 | # - the node has dependencies: call generate_subgraph for that node #
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| 71 | # #
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| 72 | # This function takes four parameters: #
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| 73 | # - The node filename: this is the only one useful for the algorithm #
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| 74 | # - The depth: number of steps starting from root (for pretty print only) #
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| 75 | # - The weight of the edge leading to that node (for printing) #
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| 76 | # - The qualifier (for printing) #
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| 77 | # #
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| 78 | # Pass 2: graph transformation #
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| 79 | # ============================ #
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| 80 | # We now have three loops over nodes of the graph #
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| 81 | # Loop 1: Remove dead edges #
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| 82 | # ------------------------- #
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| 83 | # Since some nodes have not been created because the edge leading to them #
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| 84 | # had too high a weight, the edges leading to them have to be suppressed. #
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| 85 | # For each existing node file, we make a list of lines to remove by #
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| 86 | # testing whether the destination exists. We then remove the lines. #
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| 87 | # Another approach would be to make a temporary file and output only #
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| 88 | # lines that should stay, then rename the file. This would save a loop. #
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| 89 | # All in all it is an N*e process, where N is the number of nodes and e #
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| 90 | # the average number of edges originating from a node. #
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| 91 | # Loop 2: Treat "after" edges #
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| 92 | # --------------------------- #
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| 93 | # If a node is the origin of edges qualified as "after", we want the #
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| 94 | # nodes which are the destination of those edges to be built after #
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| 95 | # the origin node, but before any node that depend on the origin #
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| 96 | # node. For that, the general rule is to change: #
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| 97 | # P---b--->A---a--->D #
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| 98 | # to: #
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| 99 | # P---b--->Agroupxx---b--->A #
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| 100 | # | #
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| 101 | # ---b--->D #
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| 102 | # But there is a problem if D depends on P, possibly through a chain, #
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| 103 | # because we create a cycle which shouldn't exist. If this is the case, #
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| 104 | # we leave A as a dependency of P: #
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| 105 | # P---b--->A #
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| 106 | # #
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| 107 | # Agroupxx---b--->A #
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| 108 | # | #
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| 109 | # ---b--->D #
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| 110 | # Doing so, it may happen that Agroupxx has no parent. We then add #
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| 111 | # Agroupxx as a dependency of root. The problem with this algorithm is #
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| 112 | # the search for paths from D to A, which may be exponential in the #
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| 113 | # number of nodes in the graph. #
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| 114 | # TODO: document other passes #
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| 115 | # TODO: needs also to document the .tree files #
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| 116 | # TODO: The following is obsolete #
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| 117 | # Circular dependencies: #
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| 118 | # #
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| 119 | # In case we find a cirdular dependency, it has the form : #
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| 120 | # parent->dependency_0->...->dependency_n->dependency_0 #
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| 121 | # If we want to build dependency_n before dependency_0, no problem: #
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| 122 | # we just prune the tree at dependency_n. If we want to build first #
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| 123 | # dependency_0, we need to put dependency_n as a dependency of parent, #
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| 124 | # then erase and rebuild the subtree from there. Now, we may have met #
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| 125 | # another circular dependency in the subtree, and erasing the tree makes #
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| 126 | # us forget the decision which was made. So, after first generating the #
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| 127 | # list of dependencies from packages.xml, we keep the generated list in #
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| 128 | # a file <nodeName>.odep, which we modify according to the decision which #
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| 129 | # was made. #
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| 130 | #---------------------------------------------------------------------------#
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| 131 |
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| 132 | # Global variables:
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| 133 | # A string of spaces for indenting:
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| 134 | declare -a spaceSTR=" "
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| 135 | # When we are backing up from a circular dependency, `parentNode'
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| 136 | # contains the node which has an edge entering the cycle
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| 137 | declare parentNode
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| 138 |
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| 139 | #---------------------#
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| 140 | generate_subgraph() { #
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| 141 | #---------------------#
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| 142 | : <<inline_doc
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| 143 | function: Create a subgraph of all the nodes reachable from the node
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| 144 | represented by the file whose name is $1. The edges considered
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| 145 | are those with maximal weight DEP_LEVEL (recursive function).
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| 146 | input vars: $1 : file name corresponding to the node whose edges will be
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| 147 | followed for the DFS
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| 148 | $2 : weight of the edge leading to this node
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| 149 | $3 : depth (root is 1)
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| 150 | $4 : qualifier (a for after, b for before, f for first)
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| 151 | externals: vars: DEP_LEVEL contains 1 if we want to build the
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| 152 | tree only for required dependencies,
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| 153 | 2 if we want also recommended ones,
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| 154 | 3 if we want also optional ones, but only
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| 155 | for the requested packages,
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| 156 | 4 if we want all the dependencies
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| 157 | (excluding external of course)
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| 158 | MAIL_SERVER contains the name of the MTA we want to use.
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| 159 | files: ../xsl/dependencies.xsl: stylesheet for creating the
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| 160 | .dep files
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| 161 | ../packages.xml: File containing packages id
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| 162 | and dependencies
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| 163 | returns: 0 if the tree has been successfully created
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| 164 | output: files: for each node reachable from $1, a file <node>.dep.
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| 165 | on error: nothing
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| 166 | on success: nothing
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| 167 | inline_doc
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| 168 |
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| 169 | local depFile=$1
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| 170 | local -i weight=$2
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| 171 | local -i depth=$3
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| 172 | local qualifier=$4
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| 173 | local -i spacing=0
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| 174 | local priostring
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| 175 | local buildstring
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| 176 | local id_of_dep
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| 177 | local prio_of_dep
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| 178 | local build_of_dep
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| 179 | local dep_level
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| 180 |
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| 181 | if (( depth < 10 )); then spacing=1; fi
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| 182 | case $weight in
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| 183 | 1) priostring=required ;;
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| 184 | 2) priostring=recommended ;;
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| 185 | 3) priostring=optional ;;
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| 186 | esac
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| 187 | case $qualifier in
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| 188 | a) buildstring=runtime ;;
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| 189 | b|f) buildstring= ;;
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| 190 | esac
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| 191 | dep_level=$DEP_LEVEL
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| 192 | if [ "$dep_level" = 3 ] && [ "$depth" -gt 2 ]; then dep_level=2; fi
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| 193 | if [ "$dep_level" -gt 3 ]; then dep_level=3; fi
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| 194 | echo -en "\nNode: $depth${spaceSTR:0:$(( depth + spacing ))}${RED}${depFile%.dep}${OFF} $priostring $buildstring"
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| 195 |
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| 196 | depth=$(( depth + 1 ))
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| 197 | if (( depth < 10 )); then spacing=1; else spacing=0; fi
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| 198 | # Start of loop
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| 199 | {
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| 200 | while read prio_of_dep build_of_dep id_of_dep; do
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| 201 | case $prio_of_dep in
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| 202 | 1) priostring=required ;;
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| 203 | 2) priostring=recommended ;;
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| 204 | 3) priostring=optional ;;
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| 205 | 4) priostring=external ;;
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| 206 | esac
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| 207 | case $build_of_dep in
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| 208 | a ) buildstring=runtime ;;
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| 209 | b|f) buildstring= ;;
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| 210 | esac
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| 211 | # Has this entry already been seen?
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| 212 | # TODO: no there is no special case!
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| 213 | # We have a special case here: if the entry has been seen at depth > 2
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| 214 | # and now depth=2 and DEP_LEVEL=3, optional deps have not been processed.
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| 215 | # If this is the case, just consider it has not been seen.
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| 216 | if [ -f ${id_of_dep}.dep ] ; then
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| 217 | case $depth$DEP_LEVEL in
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| 218 | 23) ;;
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| 219 | *)
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| 220 | # Just display it and proceed.
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| 221 | echo -en "\nEdge: $depth${spaceSTR:0:$((depth + spacing))}${MAGENTA}${id_of_dep}${OFF} $priostring $buildstring"
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| 222 | continue
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| 223 | ;;
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| 224 | esac
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| 225 | fi
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| 226 | # Is the weight higher than requested?
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| 227 | if [ "$prio_of_dep" -gt $dep_level ]; then
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| 228 | # Just display it and proceed.
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| 229 | echo -en "\n Out: $depth${spaceSTR:0:$((depth + spacing))}${YELLOW}${id_of_dep}${OFF} $priostring $buildstring"
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| 230 | continue
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| 231 | fi
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| 232 | # Otherwise, let's build the corresponding subgraph.
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| 233 | xsltproc --stringparam idofdep "$id_of_dep" \
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| 234 | --stringparam MTA "$MAIL_SERVER" \
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| 235 | -o ${id_of_dep}.dep \
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| 236 | ../xsl/dependencies.xsl ../packages.xml
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| 237 |
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| 238 | if [[ -s ${id_of_dep}.dep ]]; then # this dependency has dependencies
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| 239 | generate_subgraph ${id_of_dep}.dep $prio_of_dep $depth $build_of_dep
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| 240 | else # id_of_dep has no dependencies, just touch the file and display
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| 241 | touch ${id_of_dep}.dep
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| 242 | echo -en "\nLeaf: $depth${spaceSTR:0:$((depth + spacing))}${CYAN}${id_of_dep}${OFF} $priostring $buildstring"
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| 243 | fi
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| 244 | done
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| 245 | } <$depFile
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| 246 | depth=$(( depth - 1 ))
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| 247 | if (( depth < 10 )); then spacing=1; else spacing=0; fi
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| 248 | echo -en "\n End: $depth${spaceSTR:0:$((depth + spacing))}${GREEN}${depFile%.dep}${OFF}"
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| 249 | return 0
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| 250 | }
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| 251 |
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| 252 | #-----------#
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| 253 | path_to() { #
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| 254 | #-----------#
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| 255 | : <<inline_doc
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| 256 | function: check whether there is a path from $1 to $2 on the graph
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| 257 | input vars: $1 contains the filename of the starting node.
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| 258 | $2 contains the name of the node to reach
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| 259 | $3 contains the weight above which we do not want to
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| 260 | follow an edge
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| 261 | $seen (global) contains the list of already seen nodes.
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| 262 | It must ve set to " " prior to calling the function
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| 263 | returns: 0 if the node has been found
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| 264 | 1 if not
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| 265 | on error: nothing
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| 266 | on success: nothing
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| 267 | inline_doc
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| 268 | local start=$1
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| 269 | local seek=$2
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| 270 | local prio=$3
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| 271 | local prio_of_dep
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| 272 | local build_of_dep
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| 273 | local id_of_dep
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| 274 | local r
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| 275 |
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| 276 | if test "${start%.dep}" = "$seek"; then return 0; fi
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| 277 | seen="$seen${start%.dep} "
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| 278 | if test -s $start; then
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| 279 | {
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| 280 | while read prio_of_dep build_of_dep id_of_dep; do
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| 281 | if test "$prio" -lt "$prio_of_dep"; then continue; fi
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| 282 | if ! test "${seen% $id_of_dep *}" = "$seen"; then continue; fi
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| 283 | if path_to ${id_of_dep}.dep $seek $prio; then return 0; fi
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| 284 | done
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| 285 | } < $start
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| 286 | fi
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| 287 | return 1
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| 288 | }
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| 289 | #------------------#
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| 290 | clean_subgraph() { #
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| 291 | #------------------#
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| 292 | : <<inline_doc
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| 293 | function: Remove dangling edges and create groups of deps for "after"
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| 294 | deps: A-before->B-after->C becomes:
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| 295 | A -before-> Bgroupxx -before-> B
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| 296 | \
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| 297 | -before-> C
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| 298 | the name of the group is chosen so that it is unlikely as
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| 299 | a package name (so that it is removed when building the
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| 300 | xml book).
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| 301 | Also change the "first" qualifier so that a cycle:
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| 302 | A -first-> B ---chain---> A becomes:
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| 303 | B ---chain---> A -before-> B-pass1
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| 304 | and we remove all the dependencies which have a chain to
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| 305 | A in B-pass1.
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| 306 | Since we do not change anything else, it may happen that
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| 307 | nothing depends on B. In that case, B is appended to root.
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| 308 | input vars: None
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| 309 | files: <node>.dep files containing dangling edges and
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| 310 | "after" qualifiers
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| 311 | returns: 0
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| 312 | output: files: <node>.dep files containing no dangling edges and
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| 313 | no "after" qualifiers
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| 314 | on error: nothing
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| 315 | on success: nothing
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| 316 | inline_doc
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| 317 |
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| 318 | local node
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| 319 | local id_of_dep
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| 320 | local prio_of_dep
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| 321 | local build_of_dep
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| 322 | local lines_to_remove
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| 323 | local lines_to_change
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| 324 | local parent
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| 325 | local p
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| 326 | local b
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| 327 | local start
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| 328 | local seen
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| 329 |
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| 330 | for node in $(ls *.dep); do
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| 331 | if test $node = root.dep; then continue; fi
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| 332 | echo Cleaning $node
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| 333 | lines_to_remove=
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| 334 | {
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| 335 | while read prio_of_dep build_of_dep id_of_dep; do
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| 336 | if ! test -f ${id_of_dep}.dep; then
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| 337 | lines_to_remove="$lines_to_remove $id_of_dep"
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| 338 | continue
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| 339 | fi
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| 340 | done
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| 341 | } <$node
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| 342 | for id_of_dep in $lines_to_remove; do
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| 343 | sed "/\ $id_of_dep\$/d" -i $node
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| 344 | done
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| 345 | done
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| 346 | for node in $(grep -l ' a ' *.dep); do
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| 347 | lines_to_remove=
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| 348 | echo Process "runtime" deps in $node
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| 349 | if ! [ -e ${node%.dep}groupxx.dep ]; then
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| 350 | b=0 # Nothing depends on <node>groupxx
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| 351 | for parent in $(grep -l ${node%.dep}\$ *); do
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| 352 | p=0 # No "after" dependency depends on this parent
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| 353 | for start in $(grep ' a ' $node | cut -d' ' -f3); do
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| 354 | seen=" " # global variable used in "path_to"
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| 355 | if path_to ${start}.dep ${parent%.dep} 3; then p=1; break; fi
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| 356 | done
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| 357 | if test $p = 0; then
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| 358 | b=1
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| 359 | sed -i "s/\ ${node%.dep}\$/&groupxx/" $parent
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| 360 | fi
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| 361 | done
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| 362 | echo "1 b ${node%.dep}" > ${node%.dep}groupxx.dep
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| 363 | if test $b = 0; then echo "1 b ${node%.dep}groupxx" >> root.dep; fi
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| 364 | fi
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| 365 | {
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| 366 | while read prio_of_dep build_of_dep id_of_dep; do
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| 367 | if test $build_of_dep = a; then
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| 368 | if ! grep -q ${id_of_dep} ${node%.dep}groupxx.dep; then
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| 369 | echo "$prio_of_dep b ${id_of_dep}" >> ${node%.dep}groupxx.dep
|
|---|
| 370 | fi
|
|---|
| 371 | lines_to_remove="$lines_to_remove $id_of_dep"
|
|---|
| 372 | fi
|
|---|
| 373 | done
|
|---|
| 374 | } <$node
|
|---|
| 375 | for id_of_dep in $lines_to_remove; do
|
|---|
| 376 | sed "/\ $id_of_dep\$/d" -i $node
|
|---|
| 377 | done
|
|---|
| 378 | done
|
|---|
| 379 | for node in $(grep -l ' f ' *); do
|
|---|
| 380 | echo Process "first" deps in $node
|
|---|
| 381 | lines_to_change=
|
|---|
| 382 | {
|
|---|
| 383 | while read prio_of_dep build_of_dep id_of_dep; do
|
|---|
| 384 | if test $build_of_dep = f; then
|
|---|
| 385 | if ! test -f ${id_of_dep}-pass1.dep; then
|
|---|
| 386 | cp ${id_of_dep}{,-pass1}.dep;
|
|---|
| 387 | fi
|
|---|
| 388 | lines_to_change="$lines_to_change $id_of_dep"
|
|---|
| 389 | unset lr # lines to remove in -pass1
|
|---|
| 390 | {
|
|---|
| 391 | while read p b start; do
|
|---|
| 392 | seen=" " # global variable used in "path_to"
|
|---|
| 393 | if path_to ${start}.dep ${node%.dep} $p; then
|
|---|
| 394 | lr="$lr $start"
|
|---|
| 395 | fi
|
|---|
| 396 | done
|
|---|
| 397 | } < ${id_of_dep}-pass1.dep
|
|---|
| 398 | for p in $lr; do
|
|---|
| 399 | sed "/\ $p\$/d" -i ${id_of_dep}-pass1.dep
|
|---|
| 400 | done
|
|---|
| 401 | fi
|
|---|
| 402 | done
|
|---|
| 403 | } <$node
|
|---|
| 404 | for id_of_dep in $lines_to_change; do
|
|---|
| 405 | sed "/\ $id_of_dep\$/"'{s/[[:digit:]] f /1 b /;s/$/-pass1/}' -i $node
|
|---|
| 406 | if ! grep -q " $id_of_dep\$" *.dep; then
|
|---|
| 407 | echo 1 b $id_of_dep >>root.dep
|
|---|
| 408 | fi
|
|---|
| 409 | done
|
|---|
| 410 | done
|
|---|
| 411 | } # End clean_subgraph
|
|---|
| 412 |
|
|---|
| 413 | #----------------------------#
|
|---|
| 414 | generate_dependency_tree() { #
|
|---|
| 415 | #----------------------------#
|
|---|
| 416 | : <<inline_doc
|
|---|
| 417 | function: Create a subtree of the dependency tree
|
|---|
| 418 | (recursive function)
|
|---|
| 419 | input vars: $1 : file with a list of targets (child nodes)
|
|---|
| 420 | the first line of the file is the link
|
|---|
| 421 | $2 : priority (1=req, 2=rec, 3=opt)
|
|---|
| 422 | returns: 0 if the tree has been successfully created
|
|---|
| 423 | 1 if we are backing up to the parent of a circular dep
|
|---|
| 424 | and there are only required deps in the cycle
|
|---|
| 425 | 2 if we are backing up to the parent of a circular dep
|
|---|
| 426 | and there are recommended deps and no optional deps in the
|
|---|
| 427 | cycle
|
|---|
| 428 | 3 if we are backing up to the parent of a circular dep
|
|---|
| 429 | and there are optiional deps in the cycle
|
|---|
| 430 | modifies: vars: ParentNode is set when return is not 0
|
|---|
| 431 | output: files: for each <pkg> with dependencies in $1,
|
|---|
| 432 | a file <pkg>.tree and its dependencies
|
|---|
| 433 | on error: nothing
|
|---|
| 434 | on success: nothing
|
|---|
| 435 | inline_doc
|
|---|
| 436 |
|
|---|
| 437 | local depFile=$1
|
|---|
| 438 | local priority=$2
|
|---|
| 439 | local -a rootlink
|
|---|
| 440 | local -a priolink
|
|---|
| 441 | local -a otherlink
|
|---|
| 442 | local -i depth
|
|---|
| 443 | local -i count=0
|
|---|
| 444 | local id_of_dep
|
|---|
| 445 | local build_of_dep
|
|---|
| 446 | local prio_of_dep
|
|---|
| 447 | local parent
|
|---|
| 448 | local lines_to_remove=
|
|---|
| 449 | local srootlink
|
|---|
| 450 | local priostring
|
|---|
| 451 | local dpriostring
|
|---|
| 452 | local i
|
|---|
| 453 |
|
|---|
| 454 | {
|
|---|
| 455 | read -a rootlink
|
|---|
| 456 | depth=${#rootlink[*]}
|
|---|
| 457 | read -a priolink
|
|---|
| 458 | srootlink="${rootlink[*]} "
|
|---|
| 459 | case $priority in
|
|---|
| 460 | 1) priostring=required ;;
|
|---|
| 461 | 2) priostring=recommended ;;
|
|---|
| 462 | 3) priostring=optional ;;
|
|---|
| 463 | esac
|
|---|
| 464 | # start of depFile
|
|---|
| 465 | echo -en "\nNode: $depth${spaceSTR:0:$depth}${RED}${depFile%.tree}${OFF} $priostring"
|
|---|
| 466 |
|
|---|
| 467 | while read prio_of_dep build_of_dep id_of_dep; do
|
|---|
| 468 | case $prio_of_dep in
|
|---|
| 469 | 1) dpriostring=required ;;
|
|---|
| 470 | 2) dpriostring=recommended ;;
|
|---|
| 471 | 3) dpriostring=optional ;;
|
|---|
| 472 | esac
|
|---|
| 473 | # count entries in file
|
|---|
| 474 | (( count++ ))
|
|---|
| 475 | # Has this entry already been seen?
|
|---|
| 476 | if [ -f ${id_of_dep}.tree ]; then # found ${id_of_dep}.tree already in tree
|
|---|
| 477 | otherlink=($(head -n 1 ${id_of_dep}.tree))
|
|---|
| 478 | if [ -z "${otherlink[*]}" ]
|
|---|
| 479 | then echo otherlink empty for $id_of_dep.tree
|
|---|
| 480 | echo This should not happen, but happens to happen...
|
|---|
| 481 | exit 1
|
|---|
| 482 | fi
|
|---|
| 483 | #Do not use "${rootlink[*]}" =~ "${otherlink[*]}": case rootlink=(1 11)
|
|---|
| 484 | # and otherlink=(1 1)
|
|---|
| 485 | if [[ ${srootlink#"${otherlink[*]} "} != ${srootlink} ]]; then # cir. dep
|
|---|
| 486 | echo -en "\nCirc: $((depth+1))${spaceSTR:0:$((depth+1))}${YELLOW}${id_of_dep}${OFF} $dpriostring"
|
|---|
| 487 | # Find lowest priority in branch from parent to depFile:
|
|---|
| 488 | p2=0
|
|---|
| 489 | for (( i=${#otherlink[*]}; i < $depth ; i++ )) ; do
|
|---|
| 490 | if (( ${priolink[i]} > $p2 )); then p2=${priolink[i]}; fi
|
|---|
| 491 | done
|
|---|
| 492 | if (( $prio_of_dep >= $p2 )); then # prune
|
|---|
| 493 | lines_to_remove="$lines_to_remove $id_of_dep"
|
|---|
| 494 | sed -i "/$id_of_dep/d" ${depFile/.tree/.dep}
|
|---|
| 495 | else # find and set parent, then return lowest priority
|
|---|
| 496 | # The parent has the same link without the last entry.
|
|---|
| 497 | # We do not need otherlink anymore so just destroy the last element
|
|---|
| 498 | unset otherlink[-1]
|
|---|
| 499 | parentNode=$(grep ^"${otherlink[*]}"\$ -l *)
|
|---|
| 500 | return $p2
|
|---|
| 501 | fi
|
|---|
| 502 | else # not circular: prune tree (but not .dep, since it may happen that
|
|---|
| 503 | # the tree is destroyed and rebuilt in another order)
|
|---|
| 504 | lines_to_remove="$lines_to_remove $id_of_dep"
|
|---|
| 505 | fi # circular or not
|
|---|
| 506 | continue # this dependency has already been seen, and the associated
|
|---|
| 507 | # subtree computed. We are done
|
|---|
| 508 | fi # Has this entry already been seen?
|
|---|
| 509 | # So, this entry has not already been seen. Let's build the corresponding
|
|---|
| 510 | # subtree. First check there is a subtree...
|
|---|
| 511 | # Use -s, because it may happen that after removing lines, .dep exists
|
|---|
| 512 | # but is empty.
|
|---|
| 513 | if [[ -s ${id_of_dep}.dep ]]; then # this dependency has dependencies
|
|---|
| 514 | sed "1i${rootlink[*]} $count\\
|
|---|
| 515 | ${priolink[*]} $prio_of_dep" < ${id_of_dep}.dep \
|
|---|
| 516 | > ${id_of_dep}.tree # add link and priolink
|
|---|
| 517 | generate_dependency_tree ${id_of_dep}.tree $prio_of_dep
|
|---|
| 518 | # Test return value, in case we exchange dependencies
|
|---|
| 519 | p2=$?
|
|---|
| 520 | case $p2 in
|
|---|
| 521 | 0) # Normal return
|
|---|
| 522 | ;;
|
|---|
| 523 | $prio_of_dep) # we remove this dep, but since it may become unreachable,
|
|---|
| 524 | # move it to be built later (as a dep of parent).
|
|---|
| 525 | tree_erase ${id_of_dep}.tree
|
|---|
| 526 | lines_to_remove="$lines_to_remove $id_of_dep"
|
|---|
| 527 | sed -i "/${id_of_dep}/d" ${depFile/.tree/.dep}
|
|---|
| 528 | echo "$prio_of_dep b $id_of_dep" >> $parentNode
|
|---|
| 529 | # must be added to .dep in case parentNode is destroyed when erasing
|
|---|
| 530 | # the tree
|
|---|
| 531 | echo "$prio_of_dep b $id_of_dep" >> ${parentNode/.tree/.dep}
|
|---|
| 532 | continue
|
|---|
| 533 | ;;
|
|---|
| 534 | *) # We are backing up
|
|---|
| 535 | return $p2
|
|---|
| 536 | ;;
|
|---|
| 537 | esac
|
|---|
| 538 | else # id_of_dep has no dependencies, just record the link in a file
|
|---|
| 539 | # and print
|
|---|
| 540 | echo "${rootlink[*]} $count" > ${id_of_dep}.tree
|
|---|
| 541 | echo -en "\nLeaf: $(($depth+1))${spaceSTR:0:$(($depth+1))}${CYAN}${id_of_dep}${OFF} $dpriostring"
|
|---|
| 542 | fi
|
|---|
| 543 | done
|
|---|
| 544 | echo -en "\n End: $depth${spaceSTR:0:$depth}${GREEN}${depFile%.tree}${OFF}"
|
|---|
| 545 | } <$depFile
|
|---|
| 546 | # It may happen that a file is created with several times
|
|---|
| 547 | # the same line. Normally, all those lines but one
|
|---|
| 548 | # would be flagged to be removed (or all of them if
|
|---|
| 549 | # the dependency appeared before). A simple sed /$line/d
|
|---|
| 550 | # destroys all the lines. We should instead remove
|
|---|
| 551 | # only one for each appearance of it in lines_to_remove.
|
|---|
| 552 | # so first get the position of last line and then delete
|
|---|
| 553 | # that line
|
|---|
| 554 | for line in $lines_to_remove
|
|---|
| 555 | do lineno=$(sed -n /^[[:digit:]]\ b\ $line\$/= $depFile | tail -n1)
|
|---|
| 556 | sed -i ${lineno}d $depFile
|
|---|
| 557 | done
|
|---|
| 558 | return 0
|
|---|
| 559 | }
|
|---|
| 560 |
|
|---|
| 561 |
|
|---|
| 562 | #---------------#
|
|---|
| 563 | tree_browse() { #
|
|---|
| 564 | #---------------#
|
|---|
| 565 | local file=$1
|
|---|
| 566 | local f
|
|---|
| 567 |
|
|---|
| 568 | #echo file=$file
|
|---|
| 569 | for f in $(grep '[^0-9 ]' $file | sed 's/.* //'); do
|
|---|
| 570 | # echo f=$f
|
|---|
| 571 | if grep -q '[^0-9 ]' ${f}.tree ; then
|
|---|
| 572 | tree_browse ${f}.tree
|
|---|
| 573 | fi
|
|---|
| 574 | echo $f
|
|---|
| 575 | done
|
|---|
| 576 | }
|
|---|
| 577 |
|
|---|
| 578 | #--------------#
|
|---|
| 579 | tree_erase() { #
|
|---|
| 580 | #--------------#
|
|---|
| 581 | local file=$1
|
|---|
| 582 | local f
|
|---|
| 583 | local rootlink
|
|---|
| 584 | local rootlink2
|
|---|
| 585 |
|
|---|
| 586 | #echo file=$file
|
|---|
| 587 | rootlink="$(head -n1 $file) "
|
|---|
| 588 | for f in $(grep '[^0-9 ]' $file | sed 's/.* //'); do
|
|---|
| 589 | if [ -f ${f}.tree ]; then
|
|---|
| 590 | rootlink2="$(head -n1 ${f}.tree) "
|
|---|
| 591 | # We want two things:
|
|---|
| 592 | # i) do not erase the file if it is in another branch
|
|---|
| 593 | # ii) do not erase the file if there is a circular dependency
|
|---|
| 594 | # for case i), we test that rootlink is contained in rootlink2
|
|---|
| 595 | # for case ii), we test that rootlink2 is not contained in
|
|---|
| 596 | # rootlink.
|
|---|
| 597 | # See comment above about srootlink
|
|---|
| 598 | if [[ ${rootlink2#${rootlink}} != ${rootlink2} &&
|
|---|
| 599 | ${rootlink#${rootlink2}} == ${rootlink} ]] ; then
|
|---|
| 600 | tree_erase ${f}.tree
|
|---|
| 601 | fi
|
|---|
| 602 | fi
|
|---|
| 603 | done
|
|---|
| 604 | rm -f $file
|
|---|
| 605 | }
|
|---|
