upstream/mercurial-mirror Files · tests/test-cat.t

show: use consistent (and possibly shorter) node lengths...

show: use consistent (and possibly shorter) node lengths `hg show` makes heavy use of shortest() to limit the length of the node hash. For the "stack" and "work" views, you are often looking at multiple lines of similar output for "lines" of work. It is visually appeasing for things to vertically align. A naive use of {shortest(node, N)} could result in variable length nodes and for the first character of the description to vary by a column or two. We implement a function to determine the longest shortest prefix for a set of revisions. The new function is used to determine the printed node length for all `hg show` views. .. feature:: show: use consistent node length in views Our previous shortest node length of 5 was arbitrarily chosen. shortest() already does the work of ensuring that a partial node isn't ambiguous with an integer revision, which is our primary risk of a collision for very short nodes. It should be safe to go with the shortest node possible. Existing code is also optimized to handle nodes as short as 4. So, we decrease the minimum hash length from 5 to 4. We also add a test demonstrating that prefix collisions increase the node length. .. feature:: show: decrease minimum displayed hash length from 5 to 4 Differential Revision: https://phab.mercurial-scm.org/D558

Yuya Nishihara - - Load All Authors

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        $ hg init

        $ echo 0 > a

        $ echo 0 > b

        $ hg ci -A -m m

        adding a

        adding b

        $ hg rm a

        $ hg cat a

        0

        $ hg cat --decode a # more tests in test-encode

        0

        $ echo 1 > b

        $ hg ci -m m

        $ echo 2 > b

        $ hg cat -r 0 a

        0

        $ hg cat -r 0 b

        0

        $ hg cat -r 1 a

        a: no such file in rev 7040230c159c

        [1]

        $ hg cat -r 1 b

        1

      Test multiple files

        $ echo 3 > c

        $ hg ci -Am addmore c

        $ hg cat b c

        1

        3

        $ hg cat .

        1

        3

        $ hg cat . c

        1

        3

      Test fileset

        $ hg cat 'set:not(b) or a'

        3

        $ hg cat 'set:c or b'

        1

        3

        $ mkdir tmp

        $ hg cat --output tmp/HH_%H c

        $ hg cat --output tmp/RR_%R c

        $ hg cat --output tmp/h_%h c

        $ hg cat --output tmp/r_%r c

        $ hg cat --output tmp/%s_s c

        $ hg cat --output tmp/%d%%_d c

        $ hg cat --output tmp/%p_p c

        $ hg log -r . --template "{rev}: {node|short}\n"

        2: 45116003780e

        $ find tmp -type f | sort

        tmp/.%_d

        tmp/HH_45116003780e3678b333fb2c99fa7d559c8457e9

        tmp/RR_2

        tmp/c_p

        tmp/c_s

        tmp/h_45116003780e

        tmp/r_2

      Test template output

        $ hg --cwd tmp cat ../b ../c -T '== {path} ({abspath}) ==\n{data}'

        == ../b (b) == (glob)

        1

        == ../c (c) == (glob)

        3

        $ hg cat b c -Tjson --output -

        [

         {

          "abspath": "b",

          "data": "1\n",

          "path": "b"

         },

         {

          "abspath": "c",

          "data": "3\n",

          "path": "c"

         }

        ]

        $ hg cat b c -Tjson --output 'tmp/%p.json'

        $ cat tmp/b.json

        [

         {

          "abspath": "b",

          "data": "1\n",

          "path": "b"

         }

        ]

        $ cat tmp/c.json

        [

         {

          "abspath": "c",

          "data": "3\n",

          "path": "c"

         }

        ]

      Test working directory

        $ echo b-wdir > b

        $ hg cat -r 'wdir()' b

        b-wdir

      Environment variables are not visible by default

        $ PATTERN='t4' hg log -r '.' -T "{ifcontains('PATTERN', envvars, 'yes', 'no')}\n"

        no

      Environment variable visibility can be explicit

        $ PATTERN='t4' hg log -r '.' -T "{envvars % '{key} -> {value}\n'}" \

        >                 --config "experimental.exportableenviron=PATTERN"

        PATTERN -> t4

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				$ hg init
				$ echo 0 > a
				$ echo 0 > b
				$ hg ci -A -m m
				adding a
				adding b
				$ hg rm a
				$ hg cat a
				0
				$ hg cat --decode a # more tests in test-encode
				0
				$ echo 1 > b
				$ hg ci -m m
				$ echo 2 > b
				$ hg cat -r 0 a
				0
				$ hg cat -r 0 b
				0
				$ hg cat -r 1 a
				a: no such file in rev 7040230c159c
				[1]
				$ hg cat -r 1 b
				1

				Test multiple files

				$ echo 3 > c
				$ hg ci -Am addmore c
				$ hg cat b c
				1
				3
				$ hg cat .
				1
				3
				$ hg cat . c
				1
				3

				Test fileset

				$ hg cat 'set:not(b) or a'
				3
				$ hg cat 'set:c or b'
				1
				3

				$ mkdir tmp
				$ hg cat --output tmp/HH_%H c
				$ hg cat --output tmp/RR_%R c
				$ hg cat --output tmp/h_%h c
				$ hg cat --output tmp/r_%r c
				$ hg cat --output tmp/%s_s c
				$ hg cat --output tmp/%d%%_d c
				$ hg cat --output tmp/%p_p c
				$ hg log -r . --template "{rev}: {node\|short}\n"
				2: 45116003780e
				$ find tmp -type f \| sort
				tmp/.%_d
				tmp/HH_45116003780e3678b333fb2c99fa7d559c8457e9
				tmp/RR_2
				tmp/c_p
				tmp/c_s
				tmp/h_45116003780e
				tmp/r_2

				Test template output

				$ hg --cwd tmp cat ../b ../c -T '== {path} ({abspath}) ==\n{data}'
				== ../b (b) == (glob)
				1
				== ../c (c) == (glob)
				3

				$ hg cat b c -Tjson --output -
				[
				{
				"abspath": "b",
				"data": "1\n",
				"path": "b"
				},
				{
				"abspath": "c",
				"data": "3\n",
				"path": "c"
				}
				]

				$ hg cat b c -Tjson --output 'tmp/%p.json'
				$ cat tmp/b.json
				[
				{
				"abspath": "b",
				"data": "1\n",
				"path": "b"
				}
				]
				$ cat tmp/c.json
				[
				{
				"abspath": "c",
				"data": "3\n",
				"path": "c"
				}
				]

				Test working directory

				$ echo b-wdir > b
				$ hg cat -r 'wdir()' b
				b-wdir

				Environment variables are not visible by default

				$ PATTERN='t4' hg log -r '.' -T "{ifcontains('PATTERN', envvars, 'yes', 'no')}\n"
				no

				Environment variable visibility can be explicit

				$ PATTERN='t4' hg log -r '.' -T "{envvars % '{key} -> {value}\n'}" \
				> --config "experimental.exportableenviron=PATTERN"
				PATTERN -> t4