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GH-1041: Move compress_path to a bif that uses normalize_path

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This commit is contained in:
Tim Wojtulewicz 2020-07-06 11:24:34 -07:00
parent 3d3d5e7eb4
commit 560ee0c05e
4 changed files with 22 additions and 39 deletions
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39
scripts/base/utils/paths.zeek
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@ -21,45 +21,6 @@ function extract_path(input: string): string
return parts[1];
}
## Compresses a given path by removing '..'s and the parent directory it
## references and also removing dual '/'s and extraneous '/./'s.
##
## dir: a path string, either relative or absolute.
##
## Returns: a compressed version of the input path.
function compress_path(dir: string): string
{
const cdup_sep = /((\/)*([^\/]|\\\/)+)?((\/)+\.\.(\/)*)/;
local parts = split_string_n(dir, cdup_sep, T, 1);
if ( |parts| > 1 )
{
# reaching a point with two parent dir references back-to-back means
# we don't know about anything higher in the tree to pop off
if ( parts[1] == "../.." )
return join_string_vec(parts, "");
if ( sub_bytes(parts[1], 0, 1) == "/" )
parts[1] = "/";
else
parts[1] = "";
dir = join_string_vec(parts, "");
return compress_path(dir);
}
const multislash_sep = /(\/\.?){2,}/;
parts = split_string_all(dir, multislash_sep);
for ( i in parts )
if ( i % 2 == 1 )
parts[i] = "/";
dir = join_string_vec(parts, "");
# remove trailing slashes from path
if ( |dir| > 1 && sub_bytes(dir, |dir|, 1) == "/" )
dir = sub_bytes(dir, 0, |dir| - 1);
return dir;
}
## Constructs a path to a file given a directory and a file name.
##
## dir: the directory in which the file lives.