Ruby Scan method, regex

Syirtblplmj

Hi Im trying to parse this string with scan method

test = "Disk/File System/[/dev/mapper/rhel-var (/var)]/MB free=14791, Disk/File System/[/dev/mapper/rhel-home (/home)]/MB free=9451, Disk/File System/[/dev/mapper/rhel-opt (/opt)]/percent full=1.0"

I have to capture the path : /dev/mapper/rhel-var (/var) and the number on percent full: 1.0

I have tried with many regex but I can get it to work

testa = test.gsub(',', '')
r = testa.scan(/Disk\/File System\/\[((.*))\]\/percent full=([^[:space:]]+)/)
puts r

---Edit---

the string can have multiple ocurrences of of the FS and the percentage:

test = "Disk/File System/[/dev/mapper/rhel-var (/var)]/MB free=14791, Disk/File System/[/dev/mapper/rhel-home (/home)]/MB free=9451, Disk/File System/[/dev/mapper/rhel-opt (/opt)]/percent full=1.0, Disk/File System/[/dev/sda2 (/boot)]/MB total=1974, Disk/File System/[/dev/mapper/rhel-home (/home)]/MB total=10015, Disk/File System/[/dev/mapper/rhel-root (/)]/percent full=61.0, Disk/File System/[/dev/mapper/rhel-var (/var)]/percent full=23.0, Disk/File System/[/dev/mapper/rhel-opt (/opt)]/MB total=452543, Disk/File System/[/dev/mapper/rhel-opt (/opt)]/MB free=426145, Disk/File System/[/dev/mapper/rhel-root (/)]/MB total=10015, Disk/File System/[/dev/mapper/rhel-root (/)]/MB free=3717, Disk/File System/[/dev/mapper/rhel-var (/var)]/MB total=20030, Disk/File System/[/dev/sda2 (/boot)]/percent full=9.0, Disk/File System/[/dev/sda2 (/boot)]/MB free=1699, Disk/File System/[/dev/mapper/rhel-home (/home)]/percent full=1.0, Disk/File System/[devtmpfs (/dev)]/MB total=3851, Disk/File System/[devtmpfs (/dev)]/percent full=0.0, Disk/File System/[devtmpfs (/dev)]/MB free=3851"

help please, thanks

Wiktor Stribiżew

You can use

/Disk\/File System\/\[([^\]\[]*)\]\/percent full=(\d+(?:\.\d+)?)/

See the Rubular demo (regex101 demo). Details:

Disk\/File System\/\[ - a Disk/File System/[ string
([^\]\[]*) - Group 1: any zero or more chars other than [ and ], as many as possible
\]\/percent full= - a ]/percent full= text
(\d+(?:\.\d+)?) - Group 2: one or more digits and then an optional sequence of a . and one or more digits.

In Ruby:

test = "Disk/File System/[/dev/mapper/rhel-var (/var)]/MB free=14791, Disk/File System/[/dev/mapper/rhel-home (/home)]/MB free=9451, Disk/File System/[/dev/mapper/rhel-opt (/opt)]/percent full=1.0, Disk/File System/[/dev/sda2 (/boot)]/MB total=1974, Disk/File System/[/dev/mapper/rhel-home (/home)]/MB total=10015, Disk/File System/[/dev/mapper/rhel-root (/)]/percent full=61.0, Disk/File System/[/dev/mapper/rhel-var (/var)]/percent full=23.0, Disk/File System/[/dev/mapper/rhel-opt (/opt)]/MB total=452543, Disk/File System/[/dev/mapper/rhel-opt (/opt)]/MB free=426145, Disk/File System/[/dev/mapper/rhel-root (/)]/MB total=10015, Disk/File System/[/dev/mapper/rhel-root (/)]/MB free=3717, Disk/File System/[/dev/mapper/rhel-var (/var)]/MB total=20030, Disk/File System/[/dev/sda2 (/boot)]/percent full=9.0, Disk/File System/[/dev/sda2 (/boot)]/MB free=1699, Disk/File System/[/dev/mapper/rhel-home (/home)]/percent full=1.0, Disk/File System/[devtmpfs (/dev)]/MB total=3851, Disk/File System/[devtmpfs (/dev)]/percent full=0.0, Disk/File System/[devtmpfs (/dev)]/MB free=3851"
rx = /Disk\/File System\/\[([^\]\[]*)\]\/percent full=(\d+(?:\.\d+)?)/
puts test.scan(rx)

Output:

[
   ["/dev/mapper/rhel-opt (/opt)", "1.0"],
   ["/dev/mapper/rhel-root (/)", "61.0"],
   ["/dev/mapper/rhel-var (/var)", "23.0"],
   ["/dev/sda2 (/boot)", "9.0"],
   ["/dev/mapper/rhel-home (/home)", "1.0"],
   ["devtmpfs (/dev)", "0.0"]
]

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